Input pump and rotary output motor system having displacement varying type of direction or speed selector

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487
This subclass is indented under subclass 325.  Apparatus comprising a pump feeding a rotary motor, either the pump or motor including externally settable internal structure by which the amount of motive fluid moved therethrough on each cycle or revolution may be selected or by which the direction of flow therethrough may be reversed.

SEE OR SEARCH THIS CLASS, SUBCLASS:

389,for a system in which a displacement adjuster is positioned by a servo-motor having a feed-back linkage.
443,for a system in which a displacement adjuster is positioned by a manually controlled servo-motor.
445,for a system in which a displacement adjuster is positioned by a condition responsive means.
465,for a system having a manual displacement adjuster in combination with a condition responsive motive fluid flow controller.


 
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3968651 Trans-clutch torque converter Jul-13-1976
A multi-speed trans-clutch torque converter having pairs of input and output gears positioned on parallel input and output shafts in a closed chamber, a plurality of pairs of idler gears journalled on the shafts between the input and output gears, means to supply pressure liquid to the driven input gears...     
3972189 Control for hydrostatic transmissions Aug-3-1976
A control valve for a variable displacement pump or motor. The valve includes a pair of solenoids which are independently actuatable to port relatively high pressure fluid to their respective servo motor. A shuttle valve actuated by the high pressure fluid is used to simultaneously port the fluid from...     
3973400 Hydrostatic transmission Aug-10-1976
The hydrostatic transmission includes a main pump having a plurality of reciprocating pistons projecting into and biased towards a drive chamber and has both its inlet and its drive chamber connected to a substantially constant pressure charge circuit. Displacement of the pump is controlled by controlling...     
3975910 Variable volume liquid pumping system Aug-24-1976
A rotary input shaft is provided having an axially shiftable cam mounted thereon including circumferentially spaced and axially tapering cam lobes. A pair of reciprocating piston oil pumps are provided and include piston actuating followers engaged with the cam and operable thereby to pump oil through...     
4011722 Variable displacement hydraulic pump apparatus Mar-15-1977
A hydraulic pump apparatus including an outer housing having internal walls which are spherically configured, a hydraulically actuable variable position control ring which cooperates with the spherical housing walls to define the geometry of a hydraulic working cavity, and a rotor assembly having vanes...     
4046029 Hydromechanical transmission Sep-6-1977
A hydromechanical transmission including an input shaft, an axial piston hydraulic pump assembly associated with the shaft to be driven thereby, a pivotal swash plate operatively associated with the pump for selectively varying the displacement thereof, an axial piston hydraulic motor assembly coaxial...     
4075843 Hydraulic transmission Feb-28-1978
A hydraulic transmission operates throughout a continuous range between a neutral condition and a direct drive one to one ratio of input shaft speed to output shaft speed. The input shaft carries a rotor which provides a hydraulic pump for the input side of the transmission. Reciprocating pistons of...     
4087970 Hydrostatic transmission control May-9-1978
A hydrostatic transmission drive pump swash plate control including a control arm and a cam which are mounted on axes perpendicular to one another. The control arm is connected to the swash plate to effect simultaneous movement of the control arm and swash plate. Cushioned link means operatively interconnect...     
4109466 Hydraulic transmission Aug-29-1978
A co-axial co-planar combined hydraulic vane pump and motor having an interposed annular unitary common connecting element functioning as both pump stator and motor rotor and subject to manipulation as a unit to vary the speed ratio between said pump and motor while presenting continuous smooth annular...     
4116003 Multi-speed hydraulic drive torque converter Sep-26-1978
The trans-clutch torque converter of the invention includes a pair of parallel input and output shafts having pairs of interengaging input and output gears on the shafts together with pairs of idler or transfer gears positioned on the shafts between the other pairs of gears thereon and with hydraulic...     
4132072 Hydrostatic converter Jan-2-1979
A hydrostatic converter has at least one hydromotor and at least one pump. The characteristic curve of the pump, which represents the relationship between pressure and stroke volume, has a hyperbolic part. The performance graph of the hydromotor, which represents the relationship between motor driving...     
4137717 Hydrostatic transmission Feb-6-1979
A hydrostatic transmission having an inclined-disk variable-displacement pump and a drive-flange hydrostatic motor on a common support which includes a body having a cylindrically concave surface turned toward the motor. Between the motor drum and the surface, there is provided an intermediate disk having...     
4188859 Fluid drive mechanisms and methods Feb-19-1980
A fluid driven mechanism in the form of a fluid motor or fluid pump which is transmissionless, wherein speed and power are selectively varied by the operator through corresponding adjustment in the orientation of angularly disposed power transmitting structure. A large capacity unrestricted rotating...     
4215546 Hydrostatic transmission control system Aug-5-1980
A hydrostatic transmission control system including a variable displacement pump driving a constant displacement motor arranged in a hydraulic circuit having a controlled by-pass valve interconnected for positioning the pump swash plate in two established positions corresponding respectively to a stand...     
4240333 Hydrostatically driven road rollers Dec-23-1980
A hydrostatically driven road roller having a swash plate pump controlling the supply of pressurized fluid to a drive motor, a dead man's handle or the like controlling pressurization of the fluid in the fluid system, a manual speed control lever connected to the swash plate pump, and a disconnectible...     
4244279 Hydrostatic transmission lubrication Jan-13-1981
A hydrostatic transmission having a pump and a motor of the radial piston type with each cylinder slipper bearing rotatably supported by a hybrid or combination hydrostatic and hydrodynamic bearing on an internal bearing. The hydrostatic bearing component has a restricted port connecting hydrostatic...     
4258548 Hydrostatic transmission and controls Mar-31-1981
A hydrostatic transmission, especially for a steer drive of a propulsion and steer drive transmission, having a variable displacement pump, a fixed displacement motor, and a pump displacement control, and including a low pressure fluid source supplying the charging and lubrication systems of the hydrostatic...     
4274505 Hydrostatic-drive tractor Jun-23-1981
A narrow gauge, hydrostatic-drive tractor comprises an air-cooled prime mover, a Sundstrand hydraulic transmission mechanically coupled thereto, a fixed-displacement hydraulic motor hydraulically coupled to the Sundstrand transmission, an air conduit extending vertically upward from the fan housing of...     
4531365 Neutral start for hydrostatic transmission Jul-30-1985
A hydrostatic transmission including a pump and motor unit wherein the pump unit is displaceable effectuated by an operative member integral to the pump unit. A neutral start switch communicating with a carrying machine is mounted in the pump unit to contact the operative member in a manner causing the...     
4616478 Rotatable hydrostatic transmission Oct-14-1986
A rotatable hydrostatic transmission is formed by a hydraulic pump and a hydraulic motor which are coupled coaxially together. The pump and motor both have housing members and shaft members which are independently rotatable relative to a mounting structure. One member of the pump is rigidly coupled to...     
4624175 Quiet hydraulic apparatus Nov-25-1986
The hydraulic apparatus may either be a quiet hydrostatic drive with an axial piston pump and an axial piston motor or may be a quiet pump unit formed by two axial piston pumps. In either case, the apparatus includes two rotatable cylinder blocks disposed on opposite sides of a rotationally stationary...     
4663937 Electro-mechanical-hydraulic power generating system May-12-1987
A power generating system comprising a hydraulic transmission driven by an electric motor. The hydraulic transmission drives electric generators for recharging the electric motor battery, and a speed reducing mechanism and reverse speed reducing mechanism before and after the hydraulic transmission,...     
4686829 Rotary hydrostatic radial piston machines Aug-18-1987
A rotary radial piston pump or motor has a cylinder barrel rotating on a fixed pintle with a fluid exit at the fixed end of the pintle and an inlet at the opposite free end. A fluid impeller boosts the pressure entering the inlet and a filter prevents dirt entering. When applied to a hydrostatic transmission...     
4688815 Hydraulically driven bicycle Aug-25-1987
A hydraulically driven bicycle frame with two axle members coupled to the bicycle frame and front and rear wheels mounted on such axles for rotation about the axis of the respective axle and a pair of pedals mounted on a pedal drive shaft coupled to the bicycle frame for rotation for applying manual...     
4691512 Rotary hydrostatic machines or transmissions Sep-8-1987
A hydrostatic machine includes a casing (10) containing a rotary member (12) having radial cylinders (24) each with a piston (25) engaging a track ring (27). The member (20) is coupled to an external shaft (13) via reduction gearing (43,44) which also acts as a gear pump. This can be used to supply external...     
4716726 Adjustable rotary vane pump Jan-5-1988
An adjustable rotary vane pump for changing the direction and rate of fluid flow through the pump. The pump comprises a first pump housing having a generally cylindrical chamber therein along a central axis of the housing. A second housing is provided having a second chamber therein coaxially oriented...     
4748810 Hydromechanical torque transmission device Jun-7-1988
A hydromechanical torque transmission device comprises three coaxial rotatable bodies. These are a driving body, an intermediary body and a driven body. The driving and driven bodies are adapted to be coupled to respective coaxial shafts that are to be coupled together in rotation. A speed correlator...     
4748898 Switching valve device Jun-7-1988
A switching valve device provided in an oil passage in which the flow of oil pressure is supposed to occur in both directions, the switching valve device having two check valves provided in the oil passage so as to allow a flow of oil pressure in respective directions opposite to each other, the check...     
4751818 Hydraulic drive system for platen Jun-21-1988
A hydraulic drive system for driving a platen in forward and return reciprocatory strokes includes a hydraulically driven reciprocable piston and a reversible rotary hydraulic motor having a crank coupled to the platen by a link. A hydraulic circuit employs a variable output pump connected via a reversible...     
4773217 Earthmoving machine Sep-27-1988
An earthmoving machine comprises a first system for moving the machine, a second system for moving a mobile part of the machine, and an actuator device for the first or second system. The actuator device comprises a variable flowrate pump and a mechanism for adjusting the flowrate of the pump. A ram...     
4794756 Hydraulic differential Jan-3-1989
A hydraulic differential having a pair of axial piston displacement units, with one being a fixed displacement unit, and the other being a variable displacement unit, and having flow-directing valve and port plates positioned therebetween. The hydraulic sealing of the components which rotate relative...     
4815288 Non-step hydraulic transmission Mar-28-1989
A non-step hydraulic transmission is provided which includes a hydraulic pump having a pump cylinder and a plurality of pump plungers slidably fitted into the pump cylinder. The pump plungers are arranged in a circular pattern around the axis of the pump cylinder. A hydraulic motor having a motor cylinder...     
4821936 Hydraulic index drive system Apr-18-1989
An hydraulic index drive system including a variable displacement pump closely coupled to a fixed displacement motor through an adaptor which feeds oil to and returns oil from the motor. A lever on the pump controls the position of a swash plate which determines the pump displacement. The lever is positioned...     
4827721 Hydrostatic continuously variable transmission May-9-1989
In a hydrostatic continuously variable transmission comprising a swashplate type hydraulic pump having a pump swashplate and annularly arranged pump plungers whose suction and discharge strokes are provided by the pump swashplate, a swashplate type hydraulic motor having a motor swashplate and annularly...     
4838024 Hydraulically operated continuously variable transmission Jun-13-1989
A hydraulic motor and a hydraulic pump are interconnected by a closed hydraulic circuit. A lubricating chamber is defined around the sliding surfaces of the swash plate and the plungers of at least one of the hydraulic pump and the hydraulic motor. A hydraulically hermetic chamber is defined in surrounding...     
4843817 Integrated hydraulic transmission Jul-4-1989
A vehicle includes at least a pair of drive wheels, each wheel being independently controlled by an integrated transmission, each transmission being powered by an input shaft operably driven by a common engine. Each transmission is of a type wherein a pump head with pistons is driven by the input shaft...     
4845949 Parking brake for integrated transmission Jul-11-1989
A vehicle includes at least a pair of drive wheels, each wheel being independently controlled by an integrated transmission, each transmission being powered by an input shaft operably driven by a common engine. Each transmission is of a type wherein a pump head with pistons is driven by the input shaft...     
4845961 Hydraulically operated continuously variable transmission Jul-11-1989
A hydraulically operated continuously variable transmission includes a hydraulic motor coupled to an output shaft, a hydraulic pump coupled to an input shaft, and a closed hydraulic circuit interconnecting the hydraulic motor and the hydraulic pump. The hydraulic motor has an annular array of slidable...     
4850192 Hydraulically operated power transmission Jul-25-1989
A hydraulically operated power transmission includes a hydraulic pump drivable by a power source, a hydraulic motor for driving a device, a primary oil passage leading from the hydraulic pump to the hydraulic motor, a secondary oil passage leading from the hydraulic motor to the hydraulic pump, a plurality...     
4854125 Hydrostatically operated continuously variable transmission Aug-8-1989
A hydrostatically operated continuously variable transmission includes a cylinder block centrally coupled to a transmission shaft coupled to an engine, a swash-plate-type axial-piston hydraulic pump having a group of pump plungers, a hydraulic motor having a group of motor plungers, and a closed hydraulic...     
4856264 Hydraulic transmission apparatus Aug-15-1989
A hydraulic transmission apparatus comprises an input unit to which power from a power source is applied in a first direction, a direction changing unit hydraulically coupled to the input unit for extracting power in a second direction which is different from the first direction, and a case supporting...     
4856279 Hydraulically operated continuously variable transmission Aug-15-1989
A hydraulically operated continuously variable transmission includes a fixed shaft mounted in a transmission case, an output shaft rotatably supported in the transmission case, and a hydraulic motor coupled to the output shaft and having a motor cylinder and an annular array of slidable motor plungers...     
4864823 Hydraulically operated continuously variable transmission Sep-12-1989
A hydraulically operated continuously variable transmission includes a hydraulic pump coupled to an input shaft, a hydraulic motor coupled to an output shaft, a closed hydraulic circuit interconnecting the hydraulic pump and the hydraulic motor, a hydraulic actuator for actuating a controlled member...     
4891941 Free piston engine-pump propulsion system Jan-9-1990
A stored energy-type propulsion system for a vehicle employing a free piston engine-pump hydraulically connected to a drive motor, which in turn connects to the vehicle wheels. The hydraulic connection between the engine-pump and the drive motor includes a large-capacity pressure accumulator which is...     
4891943 Axle driving apparatus Jan-9-1990
An axle driving apparatus which houses within a casing thereof a hydraulic motor and a hydraulic pump constituting a hydro-static-transmission, provides in the wall of the lower half casing oil passages connecting the hydraulic motor and hydraulic pump, integrally forms a pump mounting surface at the...     
4891944 Hydraulically operated continuously variable transmission Jan-9-1990
A hydraulically operated continuously variable transmission comprises a hydraulic motor coupled to an output shaft, a hydraulic pump coupled an input shaft, and a closed hydraulic circuit interconnecting the hydraulic motor and the hydraulic pump. The hydraulic motor has an annular array of slidable...     
4893524 HST system axle driving apparatus Jan-16-1990
An HST type axle driving apparatus integrally assembling a hydraulic pump and a hydraulic motor at an HST type driving speed changing unit, in which a transmission casing, a pump casing and a motor casing are formed of soft metal material, such as aluminum cast, whereby mechanically processed portions...     
4896506 Transmission with integrated gear reduction Jan-30-1990
A vehicle includes at least a pair of drive wheels, each wheel being independently controlled by an integrated transmission, each transmission being powered by an input shaft operably driven by a common engine. Each transmission is of a type wherein a pump head with pistons is driven by the input shaft...     
4899541 Axle driving apparatus Feb-13-1990
An axle driving apparatus which fixes a hydraulic pump and a hydraulic motor constituting a hydrostatic transmission to one of laterally dividable transmission casings, and provides check valves capable of sacking operating oil used in the hydrostatic transmission and also used as lubricating oil in...     
4901529 Hydraulically operated continuously variable transmission Feb-20-1990
A hydraulically operated continuously variable transmission includes a hydraulic pump coupled to an input shaft, a variable-displacement hydraulic motor coupled to an output shaft, and a closed hydraulic circuit interconnecting the hydraulic pump and the hydraulic motor and including a passage connecting...     
4905472 Axle driving apparatus Mar-6-1990
An axle driving apparatus which laterally divides a transmission casing into two, a hydraulic pump vertically disposing a pump shaft and a hydraulic motor horizontally disposing a motor shaft are fixed in one transmission casing, the hydraulic pump and hydraulic motor are tight enclosed within the transmission...     
4907408 Variable displacement hydraulic servomotor system Mar-13-1990
A bidirectional hydraulic servomotor system includes a variable-displacement motor which may impel or brake movement of a load member that either resists or assits movement by the servomotor, respectively. The direction of load movement is under control of a directional control valve with motor displacement...     
4914907 Axle driving apparatus Apr-10-1990
An axle driving apparatus, in which a transmission casing thereof is vertically divided into an upper half casing and a lower half casing, the butt joint surfaces therebetween are used as bearing surfaces for axles, a motor shaft and a counter shaft, a center section is disposed in the transmission casing,...     
4914914 Hydrostatically operated continuously variable transmission Apr-10-1990
A hydrostatically operated continuously variable transmission has a hydraulic pump and a hydraulic motor which are interconnected by a closed hydraulic circuit. The hydraulic pump comprises a plurality of pump plungers reciprocably disposed radially in a cylinder block, and an eccentric pump ring engaging...     
4916900 Hydraulically operated continuously variable transmission Apr-17-1990
A hydraulically operated continuously variable transmission for an automobile includes a hydraulic pump coupled to an input shaft and having an outlet port, a hydraulic motor coupled to an output shaft, at least one of the hydraulic pump and the hydraulic motor being of the variable-displacement type,...     
4918918 Variable displacement piston machine Apr-24-1990
A variable displacement piston machine includes a valve plate (3) provided with high-pressure and low-pressure ports (5, 6) to supply and discharge fluid into and from piston chambers (80) in a cylinder block (2) and first and second control ports (P1, P2) disposed in opposite directions between the...     
4922715 Hydraulically operated continuously variable transmission May-8-1990
A hydraulically operated continuously variable transmission includes a hydraulic pump coupled to an input shaft, a hydraulic motor coupled to an output shaft, a closed hydraulic circuit interconnecting the hydraulic pump and the hydraulic motor, and a control valve coupled to an inlet of the hydraulic...     
4932209 Axle driving apparatus Jun-12-1990
An axle driving apparatus wherein a hydraulic motor and a hydraulic pump for a hydro-static-transmission are housed in a transmission casing of the axle driving apparatus and a center section for connecting the hydraulic motor and hydraulic pump is disposed in the transmission casing, the center section...     
4938024 Hydrostatic continuously variable transmission Jul-3-1990
In a hydrostatic continuously variable transmission, a pump cylinder of a swashplate type hydraulic pump is integrally and coaxially coupled with a motor cylinder of a swashplate type hydraulic motor. A number of distributor valves are radially arranged for reciprocal movement between radially inner...     
4939900 Hydraulically operated continuously variable transmission Jul-10-1990
A hydraulic motor and a hydraulic pump are interconnected by a closed hydraulic circuit. A lubricating chamber is defined around the sliding surfaces of the swash plate and the plungers of at least one of the hydraulic pump and the hydraulic motor. A shuttle valve has two input ports connected to respective...     
4944154 Hydraulically operated continuously variable transmission Jul-31-1990
A hydraulically operated continuously variable transmission includes a hydraulic motor coupled to an output shaft and having a motor swash plate and a motor cylinder supporting an annular array of slidable motor plungers held in slidable contact with the motor swash plate, a distribution member integral...     
4951469 Hydrostatic continuously variable transmission Aug-28-1990
A hydrostatic continuously variable transmission comprising a hydraulic pump having a pump cylinder, a hydraulic motor having a motor cylinder and a hydraulic closed circuit between the pump and motor, wherein the pump cylinder and motor cylinder are connected integrally rotatably to form a transmission...     
4967556 Hydrostatically operated continuously variable transmission Nov-6-1990
A hydrostatically operated continuously variable transmission includes a cylinder block centrally coupled to a transmission shaft coupled to an engine, a swash-plate-type axial-piston hydraulic pump having a group of pump plungers, a hydraulic motor having a group of motor plungers, and a closed hydraulic...     
4970862 Hydraulic continuously variable speed transmission Nov-20-1990
A hydraulic continuously variable speed transmission includes means for detecting a speed reduction ratio of said continuously variable speed transmission, means for detecting an accelerator opening, and means for detecting vehicle speed. During running, when the means for detecting the accelerator opening...     
4972675 Hydraulically operated continuously variable transmission Nov-27-1990
A hydraulically operated continuously variable transmission comprises a hydraulic pump and a hydraulic motor having a motor cylinder including an integral tubular member. A distribution disc is coupled to the motor cylinder at one end of the tubular portion and has oil passages communicating with the...     
4981201 Variable drive apparatus Jan-1-1991
An infinitely variable high efficiency drive mechanism that can act as a transmission or as a coupling between a prime mover and the reducing gears of a standard or automatic transmission, replacing a clutch or torque converter as a means of power transmission. This mechanism includes a hydraulic pump...     
4982566 Expander band for hydrostatic transmission Jan-8-1991
The present invention is an expander band for use in hydraulic pumps, motors, and hydrostatic transmissions. The band has a plurality of elongated slots located circumferentially which receive slippers attached to pistons. One reduced dimension slot fixes the position of a slipper relative to the expander...     
4986073 Axle driving apparatus Jan-22-1991
An axle driving apparatus which houses in a transmission casing thereof a hydraulic motor and a hydraulic pump at a hydro-static-transmission and disposes in the transmission casing a center section for connecting the hydraulic motor and hydraulic pump, thereby fixing the center section at the butt joint...     
5031403 Axle driving apparatus Jul-16-1991
In order that a hydraulic pump and a hydraulic motor of a hydrostatic transmission hitherto disposed to the exterior are attached to a hydrostatic transmission support member provided in a mission case, a charging pump hitherto attached to the hydraulic pump at the hydrostatic transmission is also attached...     
5072587 Hydraulically operated continuously variable transmission Dec-17-1991
A hydraulically operated continuously variable transmission includes a hydraulic pump coupled to an input shaft, a hydraulic motor coupled to an output shaft, a closed hydraulic circuit interconnecting the hydraulic pump and the hydraulic motor, a hydraulic actuator for actuating a controlled member...     
5078659 Variable speed transaxle Jan-7-1992
A transaxle driving apparatus for a small-sized vehicle such as a grass-mowing lawn tractor, formed from a two-piece housing to encapsulate a hydrostatic transmission with associated reduction gearing and mechanical differential member. One housing element is provided with a vertical input shaft which...     
5094078 Hydraulic transmission for motor vehicle Mar-10-1992
A continuously variable hydraulic transmission operatively interconnects a transmission mechanism and a clutch mechanism. The hydraulic transmission includes an oil pump having an inlet port and an outlet port and a transmission ratio control member such as a swash plate which is displaceable for varying...     
5095698 Hydrostatic transmission Mar-17-1992
A hydrostatic transmission in a closed circuit which includes a hydraulic engine having a stroke-volume control device and a hydraulic pump connected to said hydraulic engine by two pressure lines. The stroke volume of the pump and/or the engine is regulated by the stroke-volume control device. The closed...     
5101925 Hydraulic wheel motor and pump Apr-7-1992
A hydraulic wheel motor and pump are provided for use with a motor vehicle having a pair of mechanically driven wheels and a pair of non-mechanically driven wheels. The hydraulic pumps cooperate with the mechanically driven wheels, and the hydraulic motors are coupled to the non-mechanically driven wheels....     
5119632 Hydraulic transmission for motor vehicle Jun-9-1992
A continuously variable hydraulic transmission operatively interconnects a transmission mechanism and a clutch mechanism. The hydraulic transmission includes an oil pump having an inlet port and an outlet port and a transmission ratio control member such as a swash plate which is displaceable for varying...     
5142940 Vehicle transmission assembly Sep-1-1992
In a transmission assembly comprising a transmission casing (11) disposed between left and right rear wheels (13) and a hydrostatic transmission (16) supported by a plate member (15) secured to a front of the transmission casing, an axial plunger-type hydraulic pump (17) of the hydrostatic transmission...     
5156576 Compact integrated transaxle Oct-20-1992
A compact integrated transaxle has a two-piece transaxle casing for rotatably mounting a pair of oppositely extending axles along a peripheral seam formed between an upper casing part and a lower casing part. A hydrostatic transmission is also mounted in the transaxle casing and has a center section...     
5177964 Hydraulic drive traveling system Jan-12-1993
A hydraulic drive traveling system has a pressure compensated low control valve connected between a hydraulic pump and a variable displacement type hydraulic motor for controlling a flow rate of the hydraulic fluid supplied to the motor. The flow rate is controlled in accordance with the delivery pressure...     
5177967 Hydrostatic transaxle Jan-12-1993
A hydrostatic transaxle includes a hydrostatic transmission with a pump and motor, the pump and motor each including a track ring radially surrounding a cylinder in which are disposed a plurality of pistons rotatable on a fixed conduit. The motor track ring includes radially extending lugs disposed 180.degree....     
5203169 Axle drive apparatus Apr-20-1993
An axle drive apparatus of compact construction with improvements in the arrangement of the hydraulic speed change gearing and axle, and in the configuration of the transmission case. In the transmission case, there are horizontally disposed, when viewed in side elevation, a pump shaft of the HST type...     
5205123 Infinitely variable differential hydrostatic transmission Apr-27-1993
An infinitely variable differential hydrostatic transmission utilizing a fixed displacement pump/motor and a variable displacement pump/motor interconnected with appropriate valving, to provide a mechanical/hydraulic differential drive which is capable of achieving an overall efficiency in the 98.degree.-99.degree....     
5205201 Displacement control valve Apr-27-1993
A displacement control valve has a valve body with a fluid metering valve spool axially movable between pilot pressure chambers formed at opposite ends of an interior bore in the valve body. An internal spring feedback apparatus is mounted on the valve spool in one of the pilot pressure chambers and...     
5211077 Hydrostatic transmission center section May-18-1993
An intergrated hydrostatic transaxle having a common housing for a hydrostatic transmission and a pair of oppositely-extending differentially-connected axles to have the common housing provide a common sump therefor and with a specifically-shaped center section interconnecting the pair of hydraulic displacement...     
5218886 Hydrostatic transmission center section Jun-15-1993
An integrated hydrostatic transaxle having a common housing for a hydrostatic transmission and a pair of oppositely-extending differentially-connected axles to have the common housing provide a common sump therefor and with a specifically-shaped center section interconnecting the pair of hydraulic displacement...     
5239827 Hydrostatic track ring snubber Aug-31-1993
A fluid pressure independent, mechanically controlled dampener for a hydrostatic transmission pump track ring is shown. In one embodiment, two opposing wedge-shaped blocks are biased against each other by a spring-loaded bolt. A pad, axially adjacent the track ring on one side and axially adjacent and...     
5259193 Hydraulic transmission system Nov-9-1993
A hydraulic transmission system comprising a housing having at least an oil tank containing oil, an oil pump mounted in the housing and having an inlet port and an outlet port, an oil motor mounted in the housing and having an inlet port and an outlet port, a high-pressure oil passage defined in the...     
5314387 Hydrostatic transmission May-24-1994
An improved hydrostatic transmission which is compact, reliable and economical to manufacture, including a novel means for reducing the speed of the input to the transaxle using both hydraulics and mechanical gearing; an improved differential which is stronger and less complicated than prior art designs;...     
5333453 High-efficiency reduced-noise swash-plate-type hydraulic device Aug-2-1994
A swash-plate plunger-type hydraulic device has a cylinder block with a plurality of plungers slidably fitted in cylinder bores, a swash plate confronting one end of the cylinder block, and a distribution valve plate slidably held against the other end of the cylinder block. The cylinder block has an...     
5335496 Axle driving apparatus Aug-9-1994
An axle driving apparatus which is so constructed that an input pulley for engine power is set lower in mounting position with respect to the axis of a driving axle so s to enable the platform of a vehicle to be lowered. The engine position lowers to promote miniaturization, a lower center of gravity...     
5339631 Axle driving system Aug-23-1994
The present invention, firstly, lowers the lower end of pump shaft to lower the belt transmitting mechanism to thereby provide the axle driving system for the integral hydraulic transmission matching with the running vehicle of lower floor system, which is concretely the L-like-shaped center section...     
5394699 Axle driving apparatus Mar-7-1995
An axle driving apparatus wherein a brake disk is fixed to one of the output shaft of a hydraulic motor and a rotary shaft of a power transmission, and the disk, and a brake disk and an actuator cooperative therewith are held immersed in oil retained in a housing. The advantage of compactness of the...     
5396768 Gearless hydro-mechanical transmission Mar-14-1995
A hydro-mechanical transmission 10 having fluid motor 48 that is entirely rotatable to eliminate the need for separate gearing is disclosed. The gearless hydro-mechanical transmission 10 provides a variable speed and torque output from an external mechanical power source 14 and an external hydraulic...     
5412947 Continuously variable transmission May-9-1995
A working machine such as a powered lawn mower has a continuously variable transmission for transmitting the power of an engine to wheels at a variable speed reduction ratio. The continuously variable transmission comprises an axial-plunger-type hydraulic pump disposed in a case for producing a hydraulic...     
5423182 Improved hydrostatic transmission Jun-13-1995
An improved hydrostatic transmission for use in a transaxle comprising a means for mechanically diverting hydraulic fluid from the hydraulic transmission to a sump to enable the vehicle to be moved with minimal resistance from the hydraulic fluid by unseating at least one of the hydraulic displacement...     
5438831 Axle driving apparatus Aug-8-1995
A pair of axles and a hydrostatic transmission which drives them are housed in a common housing. The hydrostatic transmission comprises a hydraulic pump, with a movable swash plate, which drives a hydraulic motor with pressurized oil. Adjusting the angle and direction of slant of the movable swash plate...     
5440878 Variable hydraulic machine Aug-15-1995
A hydraulic machine is disclosed in several embodiments as a pump, as a motor, and as a combination pump/motor. The machine's fixed cylinders are positioned circumferentially to a drive shaft, the pistons being driven by, or acting against, a split swash-plate which is supported primarily by the same...     
5447028 Axle driving apparatus Sep-5-1995
An axle driving apparatus which is so constructed that an input pulley for engine power is set lower in mounting position with respect to the axis of a driving axle so as to enable the platform of a vehicle to be lowered. The engine position lowers to promote miniaturization, a lower center of gravity...     
5456068 Axle driving apparatus Oct-10-1995
An axle driving apparatus has in a housing a hydrostatic transmission with a variable displacement type hydraulic system having a slantingly movable swash plate. In one embodiment, the movable swash plate is manually slantingly operable. A leg member integrally extends from an inner wall of the housing,...     
5473964 Axle driving apparatus Dec-12-1995
An axle driving apparatus wherein a hydraulic motor and a hydraulic pump for a hydro-static-transmission are housed in a transmission casing of the axle driving apparatus and a center section for connecting the hydraulic motor and hydraulic pump is disposed in the transmission casing, the center section...     
5495712 Variable displacement type hydraulic system Mar-5-1996
A variable displacement type hydraulic system is contained in a housing. A guide is provided on an axis of slanting movement of a swash plate. The guide is fitted into an inner ring of a roller bearing. The roller bearing is fitted into a groove formed at an inner wall of the housing and a groove formed...     
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