Abstract: A recoil damper (10) for a reciprocating member (12) mounted in a housing (24) includes a annular ring (38,138) mounted adjacent a shoulder (28) formed on the reciprocation member, the annular ring (38,138) mounted in a viscous fluid interior of the housing. The annular ring (38,138) cooperates with the shoulder (28) of the reciprocating member (12) to allow a relatively free flow of the viscous fluid around the shoulder (28) upon motion of the reciprocating member (12) in one direction and to restrict flow of the viscous fluid around the shoulder (28) upon motion of the reciprocating member (12) in the other opposite direction.

Abstract: A gear pump (10) is disclosed having a housing (12) defining first and second gear cavities (38,40) and inlet and outlet ports (42,44). A pair of intermeshing gears (20,22) having a plurality of teeth (32) and teeth roots (36) are positioned in the cavities. A pair of bleed slots (50) are provided for directly communicating with the gear tooth roots and permitting entrained air and fluid thereat to be delivered away from the inlet and outlet ports. Advantageously, the bleed slots are located generally adjacent the breakaway points (46) of the respective cavities, and a pair of charging slots (62) are provided for communicating pressure from the outlet port with the gear teeth and encouraging movement of entrained air radially inwardly toward the bleed slots.

Abstract: PCT No. PCT/US79/01087 Sec. 371 Date Dec. 13, 1979 Sec. 102(e) Date Dec. 13, 1979 PCT Filed Dec. 13, 1979An impactor (10) having a fracturing portion (11) including a crank (12) and a force transferring structure (13). The force transferring structure (13) is hammered as a result of rotation of the crank (12) by a hammer (14) rotatably mounted to the crank for concurrent revolution about the crank axis (16) and rotation about a hammer axis (24). The hammer is rotated in synchronization with the crank to move a contacting portion (20) of the hammer reciprocatively toward and from the force transfer structure (13) with contact between the hammer and force transfer structure being free of rolling movement therebetween.

Abstract: A gear pump (10) has a pair of intermeshing gears (12,14) located in a corresponding pair of intersecting cavities (16,18) in a housing (20), and air bleed passages (60) are defined in the housing (20) for passing entrained air collected in the fluid at the tooth roots (42) of the gears (12,14) as a result of centrifugal force away from a preselected region (61,62) of each of the gear cavities (16,18). Preferably, a pair of arcuate air bleed passages (64) are formed in the housing (20) and are located in a trailing portion (62) of the preselected region, and a pair of grooves (70) transmit pressure from a discharge opening (48) back to the tooth roots (42) to positively encourage movement of fluid with entrained air toward the arcuate air bleed passages (64).

Abstract: An improved ripper assembly (10) wherein a ripper shank (19) is mounted to the beam (11) of a tractor by a clevis pin (22) so as to minimize side forces acting on the shank pin (25). The vertical axis of the clevis pin may be aligned with the distal end (34) of the ripper tip (21) and the horizontal axis (24) of the shank pivot pin (25). The impact surfaces (28,29) of the impacting mechanism (18) and shank (19) preferably define a plane of abutment in which lies a radius (30) from the horizontal shank pivot pin axis (24). This plane is further preferably accurately perpendicular to the ripper tip axis (31) extending perpendicularly to the radius (30). The arrangement provides a free pivoting action of the ripper assembly about the vertical axis of the clevis pin so as to effectively minimize side loads for improved extended life of the ripper assembly (10).

Abstract: A pump has three gears disposed in three cavities of a housing, with the first and second gears being connected and the second and third gears being connected. A pressurized fluid source is connected to the housing for rotating the gears, whereupon fluid is drained into and expelled from housing through a plurality of passages therein.

Abstract: A cooling system for cooling the cutting edge of an impact type ripper tip includes a source of liquid coolant under pressure and conduit means for supplying the coolant to a spray head mounted below and behind the ripper tip in a position to distribute liquid coolant to the lower surface of the tip behind the cutting edge. The spray head is detachably mounted directly behind the ripper tip and projects downward beyond the lower surface of the tip.

Abstract: A lubricating and damping system for mechanisms which undergo large changes in orientation during operation is disclosed. The system includes a scavenge compartment built into the housing of the system and a plurality of scavenge pumps mounted within the housing having separate inlets so located that at least one of the inlets is submerged within the lubricating oil regardless of the orientation of the housing with the oil picked up by the scavenge pumps delivered through deaeration means and into a collection tank. A lubrication pump draws the oil from the collection tank and supplies it for lubrication of the mechanism and for the damping means of the system.

Abstract: An earth working apparatus having a ripper for loosening earth and the like. An impact member is associated with the ripper to provide a cushioned transfer of impact force for improved earth working operation.

Abstract: An impact rock breaker includes detachable mounting means and latching means operative for mounting the rock breaker on the stick of a backhoe or excavator adjacent the bucket such that the rock breaker can be pivoted to a nonoperative position latched to the stick out of the way of the bucket to permit normal operation of the bucket and an operative position pivoted to and latched to the bucket for movement with the bucket for normal operation of the rock breaker.

Abstract: An impact rock breaker includes detachable mounting means and latching means operative to mount the rock breaker on the stick of a backhoe or excavator adjacent the bucket such that the rock breaker can be pivoted between a non-operative position out of the way of the bucket to permit normal operation of the bucket and an operative position latched to the bucket for movement with the bucket for normal operation of the rock breaker.

Abstract: A cooling system for cooling the cutting edge of an impact type ripper tip includes a source of liquid coolant under pressure and conduit means for supplying the coolant to a spray head mounted below and behind the ripper tip in a position to distribute liquid coolant to the lower surface of the tip behind the cutting edge. The spray head is detachably mounted directly behind the ripper tip and projects downward beyond the lower surface of the tip.