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57.39
This subclass is indented under subclass 54.  Wrench or screwdriver comprising a clutching element so arranged that the movement of the wrench handle in one direction will drive the work engaging means while movement in the opposite direction permits relative movement between the handle and work engaging means.

SEE OR SEARCH THIS CLASS, SUBCLASS:

60,for ratchet wrench or screwdriver.


 
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Patent Number
Title
  Date
3930776 Hydraulic wrench Jan-6-1976
A hydraulic wrench has a support, and a drive assembly which is mounted thereon and which includes a shaft that is turnable, a pair of sector drive plates which are mounted on the shaft turnable relative to the same and spaced from one another, each drive plate having an arcuate edge face formed with...     
3941017 Plier type ratchet wrench Mar-2-1976
A plier-type ratchet wrench of simple, economical and robust construction employs a single rigid thrust rod or bar to operate the ratchet drive and a single extensible helical spring which both biases the operating handle to its normal position and keeps the thrust rod and a pawl engaged with the ratchet.
3972242 Hydraulic wrench Aug-3-1976
A high-torque hydraulic wrench useful for tightening and loosening bolts and nuts on heavy machinery is described.
4027561 Hydraulic wrench Jun-7-1977
A hydraulically operated wrench for tightening and loosening threaded connectors, such as nuts and bolts, includes a shaft and a socket removably mounted on one end of the shaft for engaging a polygonal portion of a threaded connector which has to be tightened or loosened. The shaft carries a ratchet...     
4031784 Device for unlocking frozen valves Jun-28-1977
A first lever engages a first collar rotationally immobile about the body of a valve. A second lever interconnects the first collar with a second collar, which second collar is non-rotatably mounted upon the stem of the valve. Manual vertical manipulation of the levers toward one another is translated...     
4031785 Squeeze actuated wrench Jun-28-1977
A squeeze actuated wrench includes a body, a rotatable socket supported at one end of the body, a driver member for effecting rotation of the socket and a handle adapted to be gripped by the user's hand and rotated relative to the body to actuate the driver member and effect rotation of the socket. One...     
4050155 Can opener gun Sep-27-1977
A portable can opener tool shaped as a gun, with an elongated trigger pivoted to a butt handle. Pulling of the trigger to the butt of the handle serves to rotate a can past the blade of the tool so as to cut the top of the can away from the can rim. The tool incorporates a basic frame member to which...     
4079641 Hydraulic wrench Mar-21-1978
A hydraulically operated wrench for tightening and loosening threaded connectors, such as nuts and bolts, includes a shaft and a socket removably mounted on one end of the shaft for engaging a polygonal portion of a threaded connector which has to be tightened or loosened. The shaft carries a ratchet...     
4086830 Hydraulic wrench May-2-1978
A hydraulic wrench comprising: an elongated body; a drive assembly mounted at one end of the body for rotating a socket member connected thereto; a hydraulic power member connected to the drive assembly and the body for rotating the drive assembly; and an elongated reaction member engageable with the...     
4091890 Very high torque ratchet wrench May-30-1978
The high-torque ratchet wrench comprises two parallel side plates. Each plate has at one end thereof a bore. An annular ratchet wheel and a cooperating pawl are operatively disposed between the plates. The ratchet wheel defines a socket and carries a plurality of angularly-spaced teeth. A hub laterally...     
4137800 Torque wrench Feb-6-1979
There is disclosed a torque wrench, including a main body, an actuator including a piston/cylinder arrangement and cooperating spool valve which selectively supplies pressurized fluid to either side of the piston member. The actuator is supported in the main body and adapted to act upon and selectively...     
4141261 Hydraulic wrench Feb-27-1979
A manually operable plunger extends rearwardly out of an elongated housing. An hydraulic force-multiplying system inside the housing causes a piston inside the housing to be moved forward when the plunger is pushed forward. A means causes an axially extending shaft that protrudes forwardly out of the...     
4141262 Remote operated wrench Feb-27-1979
The specification discloses a remote operated wrench whereby a squeezable handle connected to a ratchet via a flexible cable imparts a torque to a drive. The ratchet and drive are carried by a housing. A guide extending from the housing receives a flexible cable which imparts a torque to a movable arm...     
4155279 Hydraulically operated valve wrench May-22-1979
A hydraulically operated wrench comprised of a body saddle, bonnet clamp and hydraulic system providing controlled high torque turning force for in-line assembly and disassembly of threadedly connected valve housing components such as the body and bonnet. With the saddle and clamp separately secured...     
4200011 High power wrenching tool Apr-29-1980
The high power wrenching tool includes a high-torque ratchet wrench, a reaction frame which supports the ratchet wrench, and a fluid actuator on the frame for actuating the wrench. The wrench comprises two parallel side plates. Each plate has at one end thereof a bore. A ratchet wheel and a cooperating...     
4201099 Hydraulic wrench May-6-1980
A hydraulic wrench comprises an integrally cast housing having a first housing portion and a second elongated housing portion extending transverse to the first portion and forming a cylinder in which a piston is reciprocably mounted. A shaft extending transverse to the axis of the cylinder is turnably...     
4228704 Marine riser tool Oct-21-1980
A tool for preloading a marine riser connection having a first member, a second member and a nut having a lug extending therefrom, the connection being made up by rotating the nut with respect to the first member so as to place the nut in tension, such tension operating to hold the first and second members...     
4233865 Hydraulic wrench Nov-18-1980
A hydraulic wrench includes a housing formed with two parallel cylinder bores in which axially displaced pistons are guided movable between an active forward stroke and a return stroke. A pair of piston rods are each pivotally connected at one of the ends thereof to a respective one of said pistons and...     
4253354 Hydraulic catworks system Mar-3-1981
A hydraulic catworks system for use on a well drilling rig for making up and breaking out a drill string which includes a hydraulic makeup piston and cylinder assembly for actuating a makeup line connected to the makeup tongs, and a breakout piston and cylinder assembly connected to a breakout line for...     
4266444 High-low speed rotary drive mechanism May-12-1981
High-low speed rotary drive mechanism for rotatably driving driven elements of a tool, for example a hydraulic chuck, while permitting axial movement of the driven elements relative thereto, said mechanism including a housing, a tubular spindle rotatably mounted by the housing top and bottom walls, drive...     
4269088 Wrench tools for castellated nuts May-26-1981
The power tool is adapted for driving one of a plurality of adjacently-spaced castellated nuts. Each castellated nut has a number of radial slots. Each nut is adapted to connect with a stud having an axial threaded bore. The power tool comprises a wrench driver for turning one of the castellated nuts....     
4279171 Torque applicator Jul-21-1981
A double-acting piston and a rotatable torque applicator stem are mounted in a torque applicator housing such that the stem is actuated by the double-acting piston. A coupling member is non-movably mounted on the stem and another coupling member is mounted for axial movement thereon, each coupling member...     
4299145 Ratchet wrench Nov-10-1981
A ratchet wrench comprising a head with an axle rotatably mounted therein carrying a drive bevel gear which is mounted for rotation within the head. A pair of driven bevel gears are rotatably mounted in the head and meshed with the drive bevel gear for rotation in opposite directions with the rotations...     
4304157 Torque wrench Dec-8-1981
The main body of a wrench has incorporated in its hollow interior an eccentric ring for receiving input, a ratchet wheel for giving output, pushing bars disposed between the eccentric ring and the ratchet wheel and linearly movable by the rotation of the eccentric ring, and pawls for intermittently rotating...     
4308767 Stud wrench Jan-5-1982
The wrench for wrenching a shaft or stud comprises a housing having a longitudinal recess therein for mounting the housing over the shaft to be turned. A pawl is pivotably connected to the housing. A first clamping jaw is slidably mounted in the recess. A second jaw is slidably mounted in the recess....     
4325274 Hydraulic force producing device Apr-20-1982
A hydraulically operated device for applying a force to a component, for example to tighten a component such as a nut comprises a square peg to engage the nut, first hydraulic means in the form of a motor to rotate the square peg rapidly and second hydraulic means in the form of a piston and co-operating...     
4339968 Hydraulic torque multiplier wrench Jul-20-1982
A power wrench includes a relatively flat elongated housing with an output shaft at one end operatively connected to one end of a drive segment lever arm whose opposite end is connected to a hydraulic cylinder mounted transverse to the lever arm. The hydraulic cylinder is connected through hydraulic...     
4339969 Ratchet wrench Jul-20-1982
A ratchet wrench includes a housing, a ratchet wheel and pawl within the housing, and a bell crank linkage for effecting rotational movement of the ratchet wheel by pivotal movement of the bell crank relative to the housing.
4346630 Ratchet wrench Aug-31-1982
Ratchet wrench, having a motor drive and having a member which oscillates angularly, cooperating with a rotor, which intermittently drives a shaft angularly through a pre-determined number of degrees, the shaft being configurated to carry a socket to fit a nut to be turned. The wrench has a head which...     
4357844 Unidirectional drive hand operated wrench Nov-9-1982
A hand operated wrench in which the driver head is rotated in the same direction regardless of the direction of movement of the wrench handle. In a first embodiment, the wrench includes nested handles operating bevel gears having shiftable pawls for reversing the direction of rotation of the driver head....     
4368655 Continuous ratchet drive Jan-18-1983
A continuous ratchet drive, especially for use in a wrench for tightening or loosening a threaded connector, mainly comprises a support on which a ratchet gear is mounted for rotation about its axis. The ratchet drive includes further a pair of drive pawls engaging with free ends thereof the teeth of...     
4372181 Compact power wrenching machine Feb-8-1983
The compact power wrenching machine (10) has an elongated, rigid frame (11). A fluid-operated cylinder (20') having a reciprocating ram (20) is mounted at one end of the frame. A wrench (22), preferably a ratcheting-type, is rotatably mounted at the opposite end of the frame. A force-transferring mechanism...     
4377955 Screw spanner or wrench Mar-29-1983
A wrench having a handle with an actuating lever arm pivoted for operation to rotate a nut engaging ring geometrically configured to accept a nut or bolt head. The nut engaging ring includes two tappets extending in the plane of rotation of the lever arm. A torque applied to the lever arm engages these...     
4385533 Universal reaction plate May-31-1983
A reaction plate assembly for use in a hydraulic torque wrench is disclosed comprising a reaction plate having a perimeter section provided with a series of spaced apart bolt openings and an adjacent perimeter section provided with at least one ring nut, bolt opening, a clevis pivotly mounted at one...     
4407175 Tool for rotating threaded fasteners Oct-4-1983
A tool for rotating a threaded fastener comprises a wrench head, a drum mounted therein and rotable by pulling on a ring attached to the free end of steel tape wound therearound to rotate a loose fastener rapidly, the rotary drive being imparted through a free-wheel mechanism and an output shaft on the...     
4409865 Continuous ratchet drive Oct-18-1983
A ratchet drive comprises a support on which a ratchet gear is mounted turnably about a first pivot axis. A lever is mounted on the support tiltable about a second pivot axis spaced from and parallel to the first pivot axis between a forward stroke and a return stroke. A pair of drive pawls are mounted...     
4425828 Right angle drive ratchet screw-driver Jan-17-1984
A ratchet drive screw-driver includes a handle, a rotor journaled in one end of the handle with a screw-driver shank extending axially therefrom, a ratchet wheel and pawl mechanism for rotating the rotor, and an actuator mechanism for driving the ratchet. The actuator mechanism includes an elongated...     
4426895 Ratchet wrench Jan-24-1984
A ratchet wrench having a top housing and a first handle cooperating with the top housing; a bottom housing with a cooperating second handle, a ratchet drum disposed within the top housing and the bottom housing and provided with exterior splines and a pair of side bevel gears rotatably mounted on a...     
4429597 Hydraulic torque wrench Feb-7-1984
A pneumatically driven power torque wrench comprising an elongate frame with front and rear ends, a transversely extending drive shaft rotatably carried by the frame at the front end thereof; a ratchet drive to rotate the shaft and including a ratchet wheel on the shaft; a drive ring about the wheel;...     
4432256 Adjustable powered wrench Feb-21-1984
An adjustable powered wrench for turning threaded members consists of a wrench adapted to be positioned over a threaded member, viz. nut or bolt, for applying a torque for tightening or loosening the same. The wrench has an operating arm for transmission of power, preferably having a head with teeth...     
4440046 Power wrench Apr-3-1984
This power wrench includes a wrench head that rotatably supports a ring having a non-circular internal profile. A ratchet device moves the ring only in one direction of rotation with respect to the wrench head. The wrench head has an internal extension and a support element is coaxially pivotally attached...     
4448096 Flutter lift for torque wrench May-15-1984
An improved torque wrench having a ratcheting assembly provided with a locking pawl activated flutter lift for disengaging a torque wrench racheting pawl during the return stroke of hydraulic cylinder piston arm.
4458563 Torque wrenches Jul-10-1984
A torque producing tool of compact design may have its driven output member displaced from the tool body through use of an easily attachable extension drive. By providing a plurality of different extension drives the maximum output torque of the tool may be varied in stepwise fashion.
4480510 Powered ratchet wrench Nov-6-1984
A powered ratchet wrench for turning threaded members, such as nuts or bolt heads, consists of a wrench assembly having a reaction arm adapted to be positioned over a threaded member, viz. nut or bolt, for supporting the same and operating a socket wrench through a ratchet mechanism applying a torque...     
4487094 Turnbuckle ratchet tightening tool Dec-11-1984
A turnbuckle ratchet tightening tool which is used in rapidly tightening and loosening barge turnbuckles used with lashing lines to lash a plurality of barges together. The tool has an extendable overcenter lock holder that fits over the turnbuckle that is resting on roller supports. The turnbuckle carrier...     
4487095 Squeeze torque wrench Dec-11-1984
A gearless squeeze torque wrench for use with a power means is provided comprising a wrench case, a fixed gripping jaw rigidly attached to said wrench case, a floating gripping jaw freely movable inside of said wrench case and a power transfer means connecting said floating gripping jaw to said power...     
4507989 Ratchet tool Apr-2-1985
A ratchet tool comprises a tubular body (1) with a handle (2) at one end and a ratchet drive (3) at the other end. The handle mounts a lever mechanism (12) which is operatively connected to the ratchet drive (3) by a plunger (4), a gear mechanism (7) and a flexible member (8). When the lever mechanism...     
4507990 Ratchet wrench Apr-2-1985
A ratchet wrench having a top housing and a first handle cooperating with the top housing; a bottom housing with a cooperating second handle; a ratchet drum disposed within the top housing and the bottom housing and provided with exterior teeth and a pair of side bevel gears rotatably mounted on a shaft...     
4513644 Fluid powered torque wrench Apr-30-1985
A fluid-powered torque wrench connectible to external fluid lines including an elongated cylindrical body having ports for introducing pressurized fluid therein; an output shaft rotatably disposed within the body and having a drive end for securing a socket thereto for engaging and driving a nut by rotation...     
4513645 Hydraulic wrench Apr-30-1985
In a pneumatically driven power torque wrench comprising a frame stopped from movement relative to a related structure, a hydraulic cylinder and ram unit carried by the frame, a work output shaft rotatable relative to the frame and coupled with work to be turned in axial alignment therewith, a lever...     
4524650 Squeeze-ratchet tool assembly Jun-25-1985
A two-part tool assembly comprising a squeeze wrench section and a ratchet wrench section adapted to be fitted into one another. The squeeze wrench section serves to convert squeezing motion into rotary motion on a variable torque basis, and the ratchet wrench section transmits the rotary motion to the...     
4524651 Power wrench Jun-25-1985
A power wrench operated with a pressure medium comprises a wrench head casing (10) which is engaged by a piston-cylinder unit (28,29). The other end of the piston-cylinder unit (28,29) is pressing against a support element (27) guided on a guideway (22) of the wrench head casing (10). The outer end (28)...     
4541309 Torque wrench Sep-17-1985
A power torque wrench operated by pulling a flexible tension element tangentially from a drum which is connected through ratchet means to a coaxial driver and having a second tension element wrapped around the drum in the opposite direction so that the work stroke of the motor winds the second tension...     
4574664 Powered back-up tongs Mar-11-1986
A powered back-up assembly is provided for securing a pipe against rotation. A plurality of heads are supported by a cage plate assembly, and are brought into gripping engagement with the pipe by rotating the cage plate assembly relative to a cam ring fixed to the body of the tong body. The cage plate...     
4589271 Two-armed hand-lever press May-20-1986
A two-armed hand-lever press, particularly for the solderless connecting of electric cables by means of a piece to be pressed, where pressing tool movable in longitudinal direction of the press can be actuated via at least one eccentric by a pawl from a lever arm, has at a part connecting the pressing...     
4592254 Ratchet wrench Jun-3-1986
A tool for turning a rotatable element for example, nuts, bolts or screws, the tool including a body having a drive head at one end of a handle which consists of a fixed portion and a movable portion connected by a flexible cable to an element driving socket via side plate pawl and ratchet teeth so that...     
4607546 Power wrench Aug-26-1986
A power wrench which includes a driving unit for driving a wrench head, a casing for the driving unit, a support foot carried nonrotatably by the casing for offsetting reaction forces created by the driving unit, a pressure member, a spherical ball and socket connection between the pressure member and...     
4619160 Power wrench Oct-28-1986
The piston-cylinder unit (30') of a power wrench presses against the arm (16), by means of a ball and socket joint (44, 45), for swivelling the ring (11), which is connected secure against rotation to the wrench head to be turned. The piston (35) and the arm (16) have complementary spherical surfaces...     
4622869 Sucker rod ratchet wrench Nov-18-1986
A ratchet barrel is placed upon the lower half of sucker rod joint. A wrench is placed upon the upper half of the joint. A torque handle is pivoted to the wrench. A pawl upon the torque handle engages a ratchet wheel upon the barrel to tighten or loosen the joint. A stop upon the wrench permits the wrench...     
4643190 Medical forceps Feb-17-1987
Medical forceps for example for excision of tissue in arthroscopic applications, comprises a jaw element rigidly connected to a shaft and a movable jaw element which is operated via a rotary rod extending through the shaft and a first bevel gear secured to the rod within a proximal housing. The first...     
4644829 Fluid-operated wrench Feb-24-1987
A fluid-operated wrench has a support, a ratchet gear mounted on the support turnably about its axis, a pair of driving pawls having free ends engageable with teeth of the ratchet gear, a driving arm which is turnable by a driving element and cooperates with the driving pawls so that during both a forward...     
4663997 Fluid-operated wrench May-12-1987
A fluid-operated wrench, comprises at least one cylinder-piston unit having an axis and including a cylinder and a piston provided with a piston rod and movable together with the latter in axial direction, the piston rod having a free end operative for engaging one object, and a linkage connected with...     
4669338 Ratcheting box wrench Jun-2-1987
A hydraulic torque wrench in which the base of the hydraulic cylinder attaches directly to the end of the torque wrench body, and the piston rod of the hydraulic cylinder attaches to the lever arm of the tool head whereby the lever arm is provided with a tracking arm guided within a recess of the torque...     
4671142 Fluid operated wrench Jun-9-1987
A fluid-operated wrench has a support, a ratchet gear turnably mounted on the support, a pair of driving pawls respectively having free ends engagable with the teeth of the ratchet gear, a drive with a driving element reciprocable along a forward and reverse stroke, a transmission between the driving...     
4674368 Ratchet mechanism for hydraulic wrench Jun-23-1987
An improved ratchet construction for a powered wrench of the type which includes an oscillating power unit adapted to provide torque to a socket assembly during each forward stroke, and a ratchet mechanism which permits the drive mechanism to return to its initial position at the completion of each stroke...     
4680994 Socket wrench with reversing ratchet Jul-21-1987
A speed socket wrench which substantially reduces the work required to remove nuts or bolts is disclosed. The wrench includes a bevel gear and mating bevel pinion mounted respectively on a gear shaft and pinion shaft. A drive shaft is provided on the outer end of the pinion shaft. Interlocking cap elements...     
4706526 Fluid operated wrench Nov-17-1987
A fluid-operated wrench for tightening and loosening threaded connectors comprises an action part having a turnable ratchet gear, and driving elements for turning the ratchet gear, and a reaction part arranged to counteract a reaction force created during tightening or loosening a threaded connector...     
4722252 Power driven wrench Feb-2-1988
A power driven wrench includes a rotatable drive rotor journalled between fixed arms of a yoke affixed to one end of a wrench handle containing a motor. Disposed between the yoke arms is a ratchet head which is driven in reciprocal angular motion by the motor. The ratchet head is engaged with the drive...     
4723348 Hydraulic cylinder repair fixture Feb-9-1988
A torque-applying device for a cylinder rod and piston in which the threaded end of the rod extends through the piston and is retained thereon by a nut tightened against the piston composed of an open-ended, elongated, horizontally extending rectangular square tube, a stabilizing stand supporting one...     
4739838 Hand-squeeze powered motorless driver Apr-26-1988
A hand-squeeze driver tool which serves to convert squeezing motion into rotary motion on a variable torque basis, with the torque being inversely related to the driving speed. The torque versus driving speed relationship is determined by the position of a squeeze lever as it is displaced from its most...     
4744271 Ratcheting box wrench May-17-1988
A ratcheting hydraulic torque wrench in which the lever arm is provided with a tracking arm guided within a channel in a wrench body. The tool head is divided into a ratcheting portion containing roller drive pins, and a notched portion to allow access to pipe flange nuts.
4748873 Power wrench Jun-7-1988
A low profile power wrench is provided which is useful both for general application and for easy accesses to bolts and nuts in cramped or hard to reach places. The drive of the wrench and the reaction system are in tension, thereby resulting in important advantages for the wrench. The wrench includes...     
4753139 Fluid-operated wrench Jun-28-1988
A fluid-operated wrench has a reciprocable driving element having a driving end, and a lever arm element pivotable about an axis and having a connecting end pivotably connected with the reciprocable driving element by means of opening provided in the one end of one of the elements and having one straight...     
4765210 Hydraulically powered screwing means Aug-23-1988
The nut-runner has a power arm and a reaction arm constructed preferably as a casing, each of which is guided in a first end region so as to be pivotable opposite the other about a common axis. It has a clamp wheel with gearing mounted in a drilled hole in the first end region of the power arm so as...     
4791836 Ratchet mechanism Dec-20-1988
An improved ratchet wrench tool ratcheting mechanism is provided wherein springs encased in the shank spindle have balls at each end of the springs to abut fixed washer surfaces so that tool operation and life is improved by increasing the frictional force and reducing the spring stress, unbalanced load,...     
4794825 Hydraulic power wrench Jan-3-1989
A split roller block assembly is interposed and captively retained between facing surfaces of the drive pin and drive piston rod disposed within the housing of a hydraulic power wrench. The assembly smoothly couples these two elements to substantially strengthen the interconnection therebetween to increase...     
4794826 Hydraulic powered wrench Jan-3-1989
A hydraulic powered wrench for fastening and unfastening a bolt, or the like, is presented. A wrench comprises a control valve capable of coupling hydraulic fluid to either of two hydraulic conduits, one on each side of a hydraulic piston within a hydraulic cylinder so that the control valve can move...     
4805496 Hydraulic power wrench Feb-21-1989
The power wrench comprises a housing (10) with a rearward housing member (12) which forms a protection against bursting for the hydraulic cylinder (27) arranged within the housing member (12). Through a joint (38, 40) and self-aligning, the piston (35) acts upon the lever (18) which is supported coaxially...     
4819520 Stationary cylinder torque wrench Apr-11-1989
A stationary cylinder hydraulic torque wrench comprising a cylinder fixedly connected to a wrench housing, a track and roller assembly for controlling alignment of a piston rod during a stroke of a piston, and a roller, rotatably connected to the end of the piston rod for transferring power to a lever...     
4825730 Fluid operated wrench May-2-1989
A fluid operated wrench for tightening and loosening threaded connectors comprises a housing having a first axis, a drive arranged in the housing and providing a driving force in an axial direction, an engaging unit of one type provided in a polygonal opening for engaging respective threaded connector...     
4838130 Power wrench Jun-13-1989
A wrench is presented which includes a power cylinder having a piston rod extending therethrough. An anchor or reaction assembly comprising an anchoring ring and attached anchor rod is adjustably attached to the piston rod to permit connection of the anchoring ring to a nut spaced from the nut to be...     
4846028 Fluid-operated wrench Jul-11-1989
A fluid-operated wrench for tightening and loosening of threaded connectors, comprises a housing, drive unit arranged substantially in the housing, and engaging unit arranged to engage a threaded connector for tightening or loosening the same, the engaging unit being operatively connected with the drive...     
4854197 Torque wrenches Aug-8-1989
The double-acting piston of a torque wrench has a piston rod, the free end of which receives a pin which is guided at each end in straight or curved guide channels in the wrench housing. The pin passes through drive shoes which are slidably received in slots at the upper end of a drive lever. As it reciprocates,...     
4913008 Torquing apparatus Apr-3-1990
A torquing apparatus is presented having a split ring which engages a member to which a torque load is to be applied. The split ring is initially loaded to establish a threshold friction load between the split ring and the member. The split ring is loaded into gripping engagement with the member during...     
4916986 Fluid operated wrench Apr-17-1990
A fluid operated wrench for tightening or loosening threaded connectors comprises a drive unit performing a forward and a rearward stroke, an abutment element arranged to abut against a neighboring object, and an engaging element arranged to engage and turn a threaded connector, the drive unit, the abutment...     
4919018 Hydraulic power wrench Apr-24-1990
The power wrench is provided with a hydraulic cylinder unit (12) and a wrench head (10). The cylinder unit (12) is movable with an arm (11) of the wrench head along a female guiding track (15), which is substantially parallel to the axis (16) of the wrench head (10). This way, the wrench head (10) may...     
4970919 Torquing apparatus Nov-20-1990
A torquing apparatus is presented having a split ring which engages a member to which a torque load is to be applied. The split ring is loaded into gripping engagement with the member during a forward (torque input) operation; and the split ring is released from the member during a return operation to...     
4974476 Fluid-operated wrench Dec-4-1990
A fluid-operated wrench as comprising a cylinder-piston unit with a cylinder having a guide and a piston performing an active stroke in one direction and a reverse stroke in an opposite direction, an engaging member arranged to engage a threaded connector to be tightened or loosened, and formed so that...     
4982626 Hydraulic torque wrench Jan-8-1991
A hydraulic torque wrench comprises a body member housing a piston-cylinder assembly and a drive member pivotal by the piston of the assembly about an axis radially spaced from the line of action of the piston, the drive member carrying a shaft or socket connected to the drive member by a ratchet connection....     
4987802 Power wrench Jan-29-1991
A power wrench includes a socket which is rotatably retained in a head portion of the wrench by a retainer. A yoke is actuated to swing by a driving axle. A number of grooves are formed in the yoke and in the retainer, each groove gradually changes from narrow to wide and receives a roller and a spring....     
4987803 Power wrench Jan-29-1991
A power wrench includes a socket which is rotatably retained in a head portion of the wrench by a retainer. A yoke is actuated to rotate reciprocally by a driving axle. A number of recesses are formed in the middle portion and the upper portion of the socket, each recess in the middle portion of the...     
5003847 Hydraulic power wrench Apr-2-1991
The hydraulic power wrench is provided with a wrench head (10) including a rotatably supported ring member (14) to be connected for rotation with a bolt head. The ring member (14) is driven be a piston (40) accommodated in a cylinder housing (11). Mutual engagement of the wrench head (10) and the cylinder...     
5005447 Torque wrench Apr-9-1991
A torque wrench for tightening or loosening of threaded connectors comprises a turnable engaging unit arranged to be turned and to engage threaded connector so as to tighten or loosen the latter in response to turning of the engaging unit, and a power drive unit for turning the engaging unit, the power...     
5016502 Power wrench May-21-1991
A power wrench for tightening and loosening of threaded connectors comprises fluid operated drive units including a cylinder and a piston movable in the cylinder and having an end, engaging units arranged to engage and turn a threaded connector for tightening or loosening the latter, a ratchet-pawl mechanism...     
5022289 Ratchet tool with flattened pocket Jun-11-1991
The ratchet tool comprises an elongated housing and a drive body carried by the housing and being rotated by a ratchet ring the toothed opening of which is in engagement with a pawl carried by the drive body. A pocket in the ring has semi-cylindrical side surfaces which engage mating semi-cylindrical...     
5029497 Continuous ratchet drive Jul-9-1991
A continuous ratchet drive for a fluid-operated wrench or the like comprises a support, a ratchet gear mounted on the support means turnably about a first pivot axis and having a plurality of ratchet teeth, a lever pivotable about a second pivot axis extending laterally from and parallel to the first...     
5056384 Torque wrench Oct-15-1991
A torque wrench in which the torquing forces are applied to the article torqued equally and oppositely in a diametrically opposed manner. The body of the wrench comprises a two-part metal frame which permits the wrench to be significantly lighter than prior art wrenches. The applied forces are provided...     
5095780 Pressure-operated power wrench Mar-17-1992
The pressure-operated power wrench is provided with an annular member (14) rotatably supported within a headpiece (10). The annular member (14) can be coupled to the bolt to be rotated and is taken along in a moving direction by a ratchet lever (18). The lever (18) is actuated by a hydraulically moved...     
5097730 Inline ratcheting tool Mar-24-1992
A wrench body pivotally connected to an end of a reciprocating power source, a tool head assembly attached to the opposite end of the reciprocating power source, which would include a tool head, having an aperture for the work piece, tracking arm attached to the tool head and for being matingly slideable...     
5103696 Pressure-operated power wrench Apr-14-1992
The power wrench is provided with two pistons (38,41) arranged within each other. The pistons (38,41) abut against a pressure member (26) for pivoting a lever (18). The lever (18) is connected by an annular member (14) to the bolt head to be rotated. In a working stroke, the path of the first piston...     
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