Abstract: Apparatus for controlling and taking up the axial displacement of large rotating cylinders, comprising a pair of end bearings, of which one is provided with driven rollers, while the other is provided with idle rollers, one of which is carried by a bearing orientable about a vertical axis. A first transducer senses the axial displacement of the cylinder and its output is connected to an input to a first device effecting a comparison with a reference signal; the output of the first comparing device is connected through an amplifier to an input to a second comparing device, a second input of which is connected to the output of a second transducer sensing the displacement of the guide roller bearing. The output of the second comparing device controls a servoactuator mechanically connected to the orientable bearing of the guide roller.

Abstract: A control apparatus comprising a cylinder including therein a piston non-stepwise controllable in terms of the amount of piston portion protruded and the speed of its protruding movement. The amount of piston portion protruded is controlled by an attachment position at which the cylinder is attached to an adaptor for fastening the control apparatus to a device desired to be controlled and the position of a bar extended into the cylinder through one end portion thereof to abut against a piston head. The speed of protruding movement of the piston is controlled by a control fluid fed into and discharged from a cylinder chamber divided by the piston head into two parts.

Abstract: An extensible outrigger construction comprises a tubular housing secured to a vehicle frame, having an outrigger beam telescoped into it. The outrigger beam comprises upper and lower horizontal plates with semicircular cut-outs at their ends to receive the cylinder of the jack; a pair of vertical flange plates have surfaces on a diametral plane of the cut-out. A cap includes upper and lower horizontal plates with semi-circular cut-outs, and vertical flange plates engaging the first mentioned flange plates, the holding cap being secured by bolts through the flange plates. The jack cylinder has an upwardly facing shoulder that engages the bottom surfaces of the lower beam plate and the lower plate of the holding cap. The cylinder of the jack has a chamfer which seats in a corresponding chamfer of the top plates.

Abstract: A vehicle mounted apparatus for loading and unloading containers onto and off of the vehicle is disclosed. The apparatus comprises a tilting frame on the body of the vehicle, a hydraulic cylinder mounted on the tilting frame for longitudinal movement along the tilting frame and a cable extending from the tilting frame around a sheave mounted on the front of the hydraulic cylinder back to the container. The sheave is concentrically mounted on cross supports extending between guides in the tilting frame. Supports are provided on the tilting frame and cylinder to prevent vibration of the cylinder when the cylinder is in an extended position and the cylinder is detachable from the tilting frame for removal for maintenance or replacement purposes.

Abstract: A self-aligning and end fixity connector for connecting a hydraulic cylinder piston rod to its respective boom section in a multi-section telescopic boom assembly wherein the piston rod end is rigidly and fixedly secured to a structural part of one boom section. The cylinder barrel has a lost motion connection with a next adjacent boom section whereby slight movement in a vertical direction can occur between the cylinder barrel and said next adjacent boom section. The arrangement significantly increases the column loading capacity of telescoping crane boom hydraulic cylinders and reduces significantly the tendency for cylinders to bind with their piston rods due to inevitable cocking of boom sections.

Abstract: A self-aligning and end fixity connector for connecting a hydraulic cylinder piston rod to its respective section in a multi-section telescopic boom assembly wherein a pair of rectangular plates are secured to the free end of the piston rod, the plates being received in retainers secured to the boom section to thereby prevent the piston rod from rotating and thus providing end fixity to the rod. A clearance is provided between the plates and the retainers to allow a slight floating action of the rod in a vertical plane so that the rod connection point is substantially in alignment with the cylinder connection point to allow full retraction without binding of the boom sections.

Abstract: A control apparatus comprising a cylinder including therein a piston non-stepwise controllable in terms of the amount of piston portion protruded and the speed of its protruding movement. The amount of piston portion protruded is controlled by an attachment position at which the cylinder is attached to an adaptor for fastening the control apparatus to a device desired to be controlled and the position of a bar extended into the cylinder through one end portion thereof to abut against a piston head. The speed of protruding movement of the piston is controlled by a control fluid fed into and discharged from a cylinder chamber divided by the piston head into two parts.

Abstract: A pair of sleeves are fixedly mounted in axial alignment on opposite sides of the power plant enclosure of a bulldozer. Rotatably received in each sleeve is a trunnion having at its outer end a yoke holding one of the blade lift cylinders of the bulldozer. The pair of opposed fluid chambers in each lift cylinder are in communication with a pressurized fluid source and drain via passages formed in the respective trunnion and sleeve. For holding the trunnions in position in the respective sleeves against the axial thrust which may be applied thereto in both directions, a stop disc is bolted to the inner end of each trunnion for engagement with one of the sleeves and with a cover bolted to the inner end of each sleeve.

Abstract: A cylinder piece for a cylinder of a pile driving ram comprises inlet and outlet ports and at least two guide girdles for supporting guide members adapted to co-operate with a guide stay of a guide frame.This considerable cylinder piece can be readily made in such a way that the possibility of unexpected damage is reduced and that it has a long lifetime, in that a core of the cylinder piece is made from ferritic-perlitic nodular cast iron with at least two substantially cylindrical guide girdle faces for guide girdles and in that at least two guide girdles are clamped around the guide girdle faces, which guide girdles are each mainly formed by a ring from predominantly ferritic nodular cast iron with a cylindrical bore.

Abstract: A tree shear head includes a frame which supports a pair of parallel crank shafts which are respectively linked to a pair of shear blades for moving the latter together into the trunk of a tree being sheared. The crank shafts are rotated by means of an actuator including a cylinder in which a pair of piston and piston rod units are mounted with the rods projecting oppositely and being respectively pivotally connected to a pair of crank arms respectively formed integrally with the pair of crank shafts. To prevent the cylinder of the actuator from shifting axially along the piston rods, a pair of links are connected between the cylinder and the frame, and for preventing the cylinder from rotating about the piston rods, a pair of rollers are mounted on the cylinder and engage the frame.

Abstract: A tree shear head includes a frame which supports a pair of parallel crank shafts which are respectively linked to a pair of shear blades for moving the latter together into the trunk of a tree to be sheared upon rotation of the crank shafts. The crank shafts are rotated by means of an actuator including a cylinder in which a pair of piston and rod units are mounted with the rods projecting oppositely and being respectively connected to the pair of crankshafts. To prevent the cylinder of the actuator from shifting axially relative to the rods and from rotating on the rods, cables are connected between the cylinder and the frame.

Abstract: A rotary actuator wherein linear movement of a piston and rack assembly disposed in a unitary housing is converted to precise rotational movement of an operating member mounted to a pinion which operably engages the rack. The operating member extends outwardly from opposite sides of the housing and is adapted for coupling with either a single or a pair of mechanisms for purposes of selectively controlling operation of the mechanisms. The actuator includes new means for locating and supporting the rack, for locating and sealing a pinion assembly in the housing, for precisely controlling rotational movement of the operating member, and for precisely and positively locating mechanism mounting brackets to the housing. The actuator may be either single or double acting.

Abstract: A power slide mechanism comprising a supporting frame, a moving frame mounted slidable on said supporting frame, double-acting fluid pressure device including a cylinder, a piston fitted slidably in the cylinder and a respective piston rod fixed to the piston at each end thereof and penetrating through the cylinder so that one end of each piston rod projects from respective end face of the cylinder, and a respective engaging and fastening device mounted at each end of the supporting frame and adapted to releasably engage the free end of a respective one of the piston rods.

Abstract: A torque collar provided with adjustable stops to engage torque transmitting members disposed at angularly spaced locations around the stator of a motor. The collar is particularly suited for use with high torque low-speed hydraulic motors wherein some free play between the stator of the motor and the collar is desirable. One embodiment provides for adjustment of the stops through means of screw mountings for the stop surfaces. Another embodiment provides for adjustment of the stops by mounting the stop surfaces on supports which are hydraulically coupled to balance the forces on the angularly disposed torque transmitting members.

Abstract: A double acting fluid pressure operated linear motor has an extruded cylinder member with a head endwall and mounting tang formed integrally thereon and has an annular step formed in the interior chamber at the rod end. A piston within the cylinder member is connected to a rod which extends through an end cap fitted against the annular step, the ends of the cylinder member being deformed inwardly to retain the end cap, rod and piston in place. This construction enables such devices to be manufactured extremely economically so that it is practical to discard and replace the actuator, if necessary, rather than performing repairs.

Abstract: This is concerned with a crusher clearing system using a plurality of hydraulic jacks disposed with relation to the adjustment ring and main frame of the crusher such that the jacks, as a unit, apply a generally vertical thrust directly between the upper main frame flange and the adjustment ring so that uncrushable material may be removed from the crushing cavity in a stalled or jammed crusher.

Abstract: An orbiting, floating mechanism which reciprocates while rotating and is capable of varying, stopping, or reversing a flow of fluid therethrough at any one revolution or any combination of revolutions or any part thereof.

Abstract: An adjustable stroke length fluid cylinder used to move agricultural or industrial machinery is disclosed. The cylinder is an enclosed unit having a movable piston therein which is attached to an axial piston rod secured to the load. A fluid valve directs the application of pressure fluid to either side of the piston to extend or retract the piston rod. One end of the cylinder houses a head unit containing an internal valve which is operated by a stop member positioned on the piston rod. The internal valve is effective to stop retraction of the piston rod when actuated by the stop member by blocking fluid flow through the cylinder. Subsequent extension of the piston rod automatically returns the internal valve to its open position.