ROD

An adjustable work support having a work supporting plunger adjustable to a position for support of a workpiece and having two sets of locking pins with one set being movable with respect to the other along with the work supporting plunger and selectively operable means for exerting a horizontal force...     

A piston is mounted for relative sliding movement in the cylindrical bore of a sleeve. The piston comprises a plurality of piston parts, one, a driving piston part connected with a prime mover or a fixed support. A piston rod, supported by the piston at one end and by a sleeve guide at the other end,...     

A power slip for supporting a well pipe, including a plurality of downwardly tapering slips adapted to be wedged against a pipe by engagement with a slip bowl, with the slips being mounted for movement between an active position about the pipe and a retracted position offset to a side of the pipe, and...     

A motion transmitting remote control assembly including a hanger body having a slideway extending therethrough in which a rod is slidably disposed with the rod attached to a flexible wire element which is, in turn, movably supported in a flexible conduit attached to the hanger body. The improvement resides...     

A transmission device has input and output members interconnected by two transmission members. One of the transmission members has only Restricted movement in either direction, and relative movement between the transmission members is necessary for movement of the output member. A pair of brakes are...     

A brake system comprising in combination a swash plate mounted on a rotating member such as an axle and a lever system connected to the swash plate and adapted to be driven by the swash plate. A caliper holding a piston is positioned adjacent one of the levers in the lever system so that the piston can...     

A coupling for use with two relatively movable members to transmit force between the members comprising a resilient coil element having convolutions positioned between the members and a solid core element positioned within the convolutions of the resilient element, the resilient element being positioned...     

The linear motion arresting device has a stationary member with an internal bore. A mating piston, formed of a plurality of piston parts, is slidable in said bore. One piston part is connected to a prime mover and the others are slidable toward and away from, and lengthwise of, said one piston part....     

A locking device adapted to lock a driven member automatically against the force which applies thereon comprising a locking plate which has an arbitrary length and locking flanks on both sides thereof; a locking member which has contact members with which locking flanks of the locking plate contact and...     

A pneumatically operated rotary power slip assembly which is mountable in a rotary drilling table. It includes a stationary housing having an annular opening therethrough adapted for mounting generally coaxially with the pipe opening in the rotary table. The stationary housing has a conduit therein for...     

A locking device for a reciprocating rod brake actuator movable between brake applying and brake releasing positions includes a pivoted pawl movable between locking and releasing positions for releasably locking the rod in its brake applying position. A spring normally biases the pawl to its locking...     

The subject matter of this specification pertains to improvements intended to be utilized in a ribbon inking machine having a frame, a drum mounted on the frame, a carriage movably mounted on the frame so as to be capable of being used with respect to the drum, a ribbon feed roller mounted on the carriage,...     

Relative translational movement between a pair of X-ray apparatus components is selectively arrested by a bidirectional lineal lock structure including an elongated locking rod carried by one of the components and a locking unit carried by the other component. The locking unit is movable along the locking...     

Structure for locking a cylinder piston or the like in one limiting position thereof including a housing, a wedge member secured to the piston for reciprocation therewith mounted within the housing and having a cam surface thereon, and a locking piston positioned within the housing for reciprocal movement...     

A device which in normal use restricts relative movement between two members to one direction. Attempted movement opposite to the one direction causes an hydraulic lock to prevent such attempted movement, which also causes wedges actuated by the hydraulic lock to engage in locking co-operation to prevent...     

A manual suspension support, in which a pair of tubes are telescoped using a vacuum source. A slidable piston in a cylinder is selectively brakable by manipulation of a handle which also carries a valve operable to vary the vacuum in the cylinder.

In a gas spring having a cylinder and a piston rod movable within the cylinder, braking elements are provided which brake or block the movement of the piston rod with respect to the cylinder when the interior pressure within the cylinder is reduced below a predetermined pressure. So the risk is eliminated...     

An impact deflection absorber and stabilizer for providing an interface between two items, surfaces, etc. permitting regulated and controlled travel (energy absorption) along its longitudinal axis and constraining motion in all other directions. An energy absorbing spring is positioned within a housing...     

A reciprocating member and a retainer cooperate to limit rotation of the reciprocating member in a bore. Grooves in the reciprocating member cooperate with corresponding portions of a retainer to guide the reciprocating member and limit rotation of the member in the bore due to the compressive engagement...     

A gripper for locking against an elongated body such as a cable is subjected to relative displacement along the length of the body and is capable of locking at any place therealong, the gripper comprising a rigid member, at least two jaws provided with surfaces for locking against the body and a system...     

A drill string holder for a rock drilling machine has two jaws opposite each other for gripping a drill string, e.g. the drill string in core drilling with a diamond drill bit. The jaws are forced into their gripping positions by means of a heavy spring. A first selectively actuatable hydraulic piston...     

A brake apparatus is disclosed in which a rotary shaft coupled to a load to be rotated is rotatably supported by a plain bearing and a biasing device is located near the shaft to bias or move the shaft to the biasing device to applying braking force to the rotating load by the friction between the shaft...     

This invention relates to a height gage of a type to be attached to a digital readout and in which a source of air under pressure is utilized for providing anti-friction means for moving a slide which carries a tool for measuring distance.

Apparatus for securely locking tractor pin drive apparatus against unintended movement transverse to the movement of the paper being fed by the device comprising a split U-shaped clamping member surrounding an elongated support means carrying the tractor and secured to the tractor body. A flat sided,...     

A brake mounted upon a moveable phototypesetter lens carriage is in continuous braking contact with a stationary flat elongated way member positioned along the path of motion of the carriage. A central portion of a brake shoe member is rigidly affixed to the moveable carriage and has first and second...     

Disclosed is a mechanical locking device for locking a rod in a conventional hydraulic actuator, such as a hydraulic cylinder or a rotary actuator. The device comprises a radially contractible locking ring having a cylindrical inner surface for gripping the rod when the locking ring is contracted and...     

A friction support device adapted to support two members in variable positions relative to one another, through the utilization of friction, until an external force is applied to bring the two members together. The friction support device comprises a slide rod inserted into the aperture in a slide holder....     

A slip assembly for supporting well pipe in a rotary table and including a slip bowl structure to be received and supported within the rotary table in a relation to turn with it, a carrier structure supporting a plurality of slips and mounted for upward and downward movement relative to the slip bowl...     

An assembly comprising an inner and an outer cylindrical members, the inner member being displaceable within the outer member and provided with an annular recess, a locking ring being housed in the recess to allow displacement of the inner member in a first direction but locking the members relative...     

A locking device includes an annular locking face formed on the inner surface of a casing and an annular lockable face opposed to the locking face and provided on a driven member turnably mounted on the casing. The lockable face is movable into pressing contact with the locking face to lock a lever when...     

A well slip assembly including a support structure adapted to be placed on a well drilling rotary table and to turn therewith, a vertically movable slip suspending carrier structure, latch means for releasably retaining the carrier structure and slips in a lower active position relative to the support...     

An assembly comprising an inner and an outer cylindrical members, the inner member being displaceable within the outer member and provided with an annular recess, a locking ring being housed in the recess to allow displacement of the inner member in a first direction but locking the members relative...     

A bidirectional steering mechanism is disclosed for a vehicle such as a motor boat wherein a manually steerable wheel is connected through the steering mechanism to steer an outboard motor; however, wave action or torque reaction from the motor cannot act in an opposite direction through the steering...     

A tapered, hollow bowl of a well spider fitted to an elongated base member and supporting a circumferential array of well casing gripping slips mounted within the bowl for vertical movement to radially enlarge and contract a circular hole within the center of the slip receiving the well casing is segmented...     

A cylinder gripping apparatus having a jaw, a body and a floating interfacing assembly having a curved surface bearing against an opposing surface or groove, the interfacing assembly being operable to generate a proportional gripping force in response to an axial force upon the cylinder to be gripped....     

A chain tensioner comprises: a plunger yieldably urged and displaceable in one direction to transmit chain tensioning force to a chain, and a wedgable means co-acting with the plunger to block its retraction.

A mechanical locking device includes multiple components that must move before axial travel of a load exerting component becomes unblocked. Such elements include a main lock means that is radially movable to unblock said axial travel; axially movable holder means that blocks radial movement of the main...     

A pipe hanger for supporting and sealing a tubular conduit in a producing well. The initial application of the tubular conduit weight to the hanger automatically actuates the seal and both sets of pipe gripping members. The upper set of pipe gripping slips initiates support of the tubular conduit and...     

An actuating rod is locked firmly in position by a split spring locking ring which engages matching shoulders in a groove on the rod. An electrical signal operates to energize a squib gas generator which produces pressure forcing a piston inward unlocking the ring and engaging wedge faces on the split...     

A well bowl has an opening extending through the bowl, at least a portion of which is formed in the shape of a pyramidal frustum. A plurality of slips are movable along the pyramidal surfaces and together define an inner opening, the slip surfaces which define the inner opening being adapted to engage...     

Improved rotary power slips having a housing for mounting in a rotary table of an earth drilling rig. Air is transferred from a stationary fluid source on the drilling rig to pneumatic cylinders carried by the housing when said housing is static to operate said slips. Transfer is accomplished by expansion...     

A clamp used on pipe comprises a clamp having a body adapted to be positioned around the pipe having first and second ends, gripping members for engaging the pipe connected to the body and a screw member pivotally connected to the first end of the body for extending through a passageway in a member connected...     

A wire or band electrode type electric discharge machine for machining hard metals by an electric spark generated between the metal workpiece and a wire electrode which is fed longitudinally to provide a fresh supply thereof while a prescribed relative motion is established between the workpiece and...     

For mechanism for releasably locking or braking an elongate element and associated structure comprises mechanism including a member adapted to be mounted on the associated structure and providing clutching surface means engageable with one side of the elongate element. A locking lever has one end pivotally...     

An improved slip-type elevator locking mechanism has a lock rod which has one end connected to the slip setting yoke and a free end extending generally parallel with the direction of movement of the slips in the elevator bowl. A cam arm mounted on the elevator at a central pivot point has a cam throat...     

A tubing string anchor (20) is provided for anchoring a tubing string (14) within a well bore (10). This prevents motion of the tubing string during a pumping operation. The anchor (20) includes a support (26) for mounting a number of roller assemblies (32-38). Each roller assembly includes a roller...     

A dual string spider having a body of two halves pivotally secured at one side and releasably secured at the other side with bowls extending through the body and open to each other, gripping means for each bowl, an actuator for each gripping means, and bars extend through the body halves to divide the...     

A fluid pressure activated mechanism in a rollable side wheel irrigating device allows gravity to maintain the sprinkler head portion of the device perpendicular or level to the ground as the device is rolled in position, and prevents nozzle pressure from moving the sprinkler head once fluid has entered...     

A slide is confined for travel along a guide having a surface which can be interengaged by one or more friction pads on the slide. An operating lever rigid to the slide and projecting outwardly therefrom may be grasped at its outer end for the purpose of operating the slide, and because the slide is...     

A seat-positioning mechanism is disclosed and is of the type which includes an elongated housing having a rod slidably received therein for movement in either direction with respect to the housing. The housing contains friction lock elements which have a locked position canted about a fulcrum to be in...     

A slip unit for releasably supporting a well pipe, including a support structure to be positioned on and turn with a rotary table and preferably taking the form of a slip bowl, and a vertically movable slip carrier structure suspending a number of pipe-gripping slips and adapted to be releasably retained...     

A fluid pressure actuator which locks in the extended position. The lock is a roller operated, dual segment pawl mechanism that unlocks in response to a pressure difference between extend and retract pressures. The two lock segments, chamfered for engagement with the cylinder end, are in diametrically...     

A mechanical lock normally preventing axial motion of a rod with respect to a housing sleeve that surrounds the rod includes a coil spring whose diameter is slightly less than the diameter of the rod so that the coil spring normally encircles and grips the rod tightly. The coil spring is mounted on the...     

The structure disclosed is that part of a complete drilling apparatus which suspends the string of drill pipe in the well from the derrick floor. The apparatus is disclosed as automatically actuated to grip the pipe below the box on its upper end while either awaiting attachment to a hoist apparatus...     

A mechanical lock of the type in which axial translational movement of a rod is prevented by a coil spring which encircles the rod and grips it and being readily released by application of a relatively small force through a relatively short stroke, thereby permitting the mechanical lock to be controlled...     

A brake for retarding rotation of a powered shaft in which the shaft includes a crankshaft section having opposed pistons disposed on the crank section, pistons oriented in respective laterally extending cylinders, sections of the cylinder on a side of the piston remote from the crankshaft provided with...     

A slip elevator apparatus for elevating hand-type slips and slip assemblies provides a frame and has means accompanying the frame for removably affixing the frame to a drilling rig rotary table allowing the frame to rotate therewith, with the frame occupying during operation a peripheral position on...     

Load support apparatus comprising a housing on which a suspension device is mounted for movement between an operative load suspension position and an inoperative relaxed position. Also mounted on the housing is a holding bolt which is movable between a first position in which a load is supported by the...     

A mechanical lock normally preventing axial motion of a rod with respect to a housing includes a coil spring which normally encircles and grips the rod tightly. The coil spring is mounted on the rod between a fixed bushing and a rotatable bushing. The two bushings are identical and interchangeable to...     

A chain tensioner comprises a plunger yieldably urged and displaceable in one direction to transmit chain tensioning force to a chain, and a wedgable means co-acting with the plunger to block its retraction. Body structure associated with the plunger and wedgable means may incorporate an outer body and...     

A rod wrench is provided for use with hollow stem auger drills of the type wherein auger sections are connected through a key system and secured together with a fastener. The wrench comprises a body portion which seats on and connects to the top of an auger section, a slip jaw riding in an inclined jaw...     

A gas spring comprising a cylinder, a rod slidably extending from the cylinder, and a novel locking mechanism. The mechanism comprises first and second axially contiguous recesses in the circumference of the rod, a locking member normally located in the first recess and snappingly and rockingly movable...     

A shock absorber for a vehicle is provided with an elongated rod which is longitudinally displaceable with respect to a carrier which supports at least one frictional rod engagement member for producing a rod travel retardation force. The rod engagement member is arranged to apply a lateral force to...     

A clamping device includes three clamping jaws guided at an angle in a hong for engaging an axially displaceable load-bearing rod. Reliable clamping is obtained without alteration of the setting position reached. This is achieved by providing a servo-piston in the housing, which piston is displaceable...     

A clamping device for the play-free fixing of a bar has clamping jaws radly slidably mounted in the housing of the device, into an outer release position and an inner clamping position. A double-acting servo-piston is disposed about the bar and has connected to it wedge elements which extend axially...     

An exercise machine for simulating the stroke of a canoe paddle is disclosed. A tube is pivotably mounted on the longitudinal axis of a frame. A paddle-like shaft is pivotally connected to a frictional resistance element sidably mounted on the tube. The frictional resistance element provides greater...     

A ball screw brake and stop assembly having an elastomeric compression pad or elastomer member circumferentially surrounding the ball screw and received in a counter bore of a non-rotating assembly having a bore receiving the ball screw with the pad confined on its outer diameter and at one axial end....     

A ball locking mechanism for the releasable locking of a movable part comprises a locking or arresting ball arranged in at least one bore of a stationary or fixed part or component and can be pushed, by means of a slide member, into one of a number of bores of the movable part or element, so that such...     

A disk brake operating mechanism including an hydraulically operated piston in a cylinder arranged to move a friction pad into contact with a disc, in which a mechanically actuated brake operating mechanism is provided, the mechanism consisting of a piston rod abutting the piston and being axially movable...     

Fluid pressure mechanism for locking a movable rod or similar member in scted positions of adjustment. The mechanism includes a fluid housing having at least one annular rod-gripper element encircling a movable rod. Introduction of fluid pressure into the housing causes the gripper element to expand...     

A motor driven treadmill having a speed control operated by the user and an elevation control operated by the user so that the user can vary the speed and the inclination of the treadmill as desired both at the start and during exercise. Spaced elevation units carried at one end of the treadmill frame...     

An electromechanical pipe snubbing system and an electromechanical pipe snubber. In the system, each pipe snubber, in a set of pipe snubbers, has an electromechanical mechanism to lock and unlock the snubber. A sensor, such as a seismometer, measures a quantity related to making a snubber locking or...     

Slip mechanisms for selectively gripping and releasing conduit in a well drilling operation, particularly useable as elevators or spiders. Three slips are positioned within a tapered bore of the slip mechanism having a split front opening, and are articulatingly suspended from a vertically movable ring....     

A plate is attached to a rail which moves vertically in a housing. The housing includes a brake which rubs on one side of the rail; on the other side, there is a roller. A leaf spring is positioned between the housing and the roller. When the rail moves vertically in one direction, the roller is pushed...     

Apparatus for decelerating a sheet moving at a predetermined linear speed along a travel path. The apparatus, located in juxtaposition with the sheet travel path, engages a sheet traveling along such path to apply a deceleration force to such sheet. The deceleration force imparted to such sheet is progressively...     

High speed pipe handling apparatus is disclosed. A pipe gripping system includes fluid pressure piston-and-cylinder propulsion systems to manipulate pipe gripping slip members, and includes a mechanical latching system that locks the pistons to the cylinders in the pipe-gripping configuration by latch...     

A hydraulic cylinder safety lock allows an operator of an implement controlled through the use of an extendable and retractable hydraulic cylinder to mechanically lock the cylinder in a transport position. The lock also is used to lock the cylinder during storage between seasons so that the implements...     

The apparatus comprise a generally tubular outer element, a generally cylindrical inner element disposed therewithin and sized relative thereto to provide a generally annular operating space therebetween. An intermediate element is disposed in said operating space and is dimensioned relative thereto...     

A chair height mechanism in which a threaded nut (30) is threaded onto a threaded spindle (16) and a hub tube (18) supports the spindle through a clutch comprising a locking tube (34) secured to the nut (30) and having lower tapered portion (36), and a cylindrical liner (46) secured to the hub tube and...     

A stretchable tube-like sleeve surrounds and frictionally grips an inner rod or tube. A coil spring surrounds the sleeve in position to resist movement of one end of the sleeve against the spring force. Moving the rod axially relative to the spring in a direction against the spring force on the sleeve...     

An adjustable stop for gripping a rod at selected locations intermittent the length of the rod, including a base member with a pair of longitudinally spaced openings for receiving a rod having a longitudinal axis. A clamp member is provided with an opening located between the base member openings for...     

An automotive seat adjusting device which includes a rod slidably received within a plurality of lockwashers counted into locking engagement with the rod. The operative elements of the locking mechanism are enclosed within a housing and a hollow tubular steel fulcrum is supported by a pin projecting...     

An isokinetic muscular exercise mechanism for the human body having an elongated tubular rail (14), a tubular slide member (20) mounted on the rail for sliding movement therealong, and a brake (32) mounted within the tubular slide member adapted to provide substantially higher frictional resistance to...     

A braking device for arresting an axial relative movement between a bearing, and a shaft slidably engaging the bearing and extending through a cylinder which is axially immovable to the bearing. The device comprises: an annular piston slidably received in the cylinder and slidably engaging the shaft;...     

A no drip caulking gun which includes a rigid open barrel. The caulking cartridge is inserted in the barrel. A rod is coaxially movable with the barrel. At the end of the rod a plunger is mounted. The forward motion of the plunger against the cartridge forces the caulking compound out of the cartridge,...     

A locking wheeled locking carrier including a pair of identical molded half carriage parts each of which carries a pair of canted wheels to support the carrier within a track, and a pendulum part pivoted between the carriage halves and extending downward through the bottom slot in the ceiling track for...     

A hydraulically operated slip assembly, connectible to a well head or well pipe handling machine and useful to intermittently grip pipe being run into or pulled from the well. The slip assembly has upper and lower plates with passages for pipe. Wedges, carrying unique slip systems, are positioned around...     

An infinitely positionable mechanical lock having a housing and at least one bushing fixed to the housing, the bushing having an inclined spring abutment surface. A rod is axially slidable through the bushing relative to the housing. A coil spring is wound about the rod, the spring having a normal inner...     

An oscillation damping device having a differentiated action in the two directions of sliding of a rigid stem with respect to a rigid case, comprising a plurality of rigid rolling elements, interposed between a rolling race of viscoelastic material and one or more skidding metallic races, shaped in such...     

A piston-controlled locking mechanism including an external cylinder having annular retaining means, a first elongated piston located adjacent the cylinder and having ball lock positioning apertures in the extension, a second coaxially located piston positioned inside of the skirt of the first piston...     

A linearly infinitely variable mechanism comprises first and second portions which are relatively axially positionable to establish the effective length of the mechanism. A rotary element is axially captured on the second portion. The operative connection between the first portion and the second portion...     

There is disclosed an improved device for locking reciprocating piston type fluid actuators in a desired position. The device includes a body, a piston having a lost motion connection to the body, a locking piston being movable with respect to the piston, an actuating cone supported on the piston, split...     

An electric pipe snubber has an annular housing, fixed to a supporting surface, surrounding a pipe and a plurality of brake means fixed to the housing radially disposed about the pipe, which are biased towards and engage a serrated section on the pipe, and a means for electromagnetically releasing the...     

The headframe supports tubular pipe guides in the shaft. Each guide comprises a multiplicity of pipes threaded one to another and extends below the normal range of conveyance travel in the shaft. Each guide is suspended from the headframe by a substantially solid bar depending from the headframe and...     

A frictional damping assembly operated by a load bearing spring assembly, either an elastomerically damped coil spring or a reinforced elastomeric spring, together provide damped, resilient load bearing support for a telescoping load bearing assembly. The strut is particularly suitable for use in front...     

The piston cylinder type damper comprises a cylinder connected to either member of the pair of a main body and an openable object, and a piston connected to the other member of the pair and adapted to fit into the cylinder and the piston incorporates therein a check valve adapted to allow the air in...     

A rear wheel suspension system for bicycles having "on-demand" mode selection. The bicycle can be made "rigid" (no shock-absorbing movement of the rear wheel) or "sprung" (rear wheel movement) by means of a swing-arm wheel mount and an elastomer cylinder inside a rear shock absorber, which is manually...     

Rotary power slips mounted in the rotary table of an earth drilling rig and having slips for gripping and releasing pipe in the rotary table. The air transfer ring has concentric grooves in the upper surface. An annular seal ring is secured to the body of the rotary power slips and has a pair of air...     

The invention relates to a fluid power actuator with a cylinder, a piston and a piston rod whose motion is controlled by a positioning device which halts it in selected settings. The positioning device has a row of depressions, for example gaps between the teeth of a rack, running parallel to the piston...     

A locking device for a circumferentially grooved reciprocating member is disclosed. In one embodiment the locking device includes a housing, through which the reciprocating member passes, having a pair of spring biased locking elements and a release element disposed therein. Locking is achieved by insertion...