Abstract: A locking assembly has two members which are moveable into coupling engagement with one another. The two members have lock engaging walls, and one of the members has an opening between the lock engaging walls for receiving a lock. The lock comprises a lock body and a retainer. The lock body has a channel for receiving a portion of the retainer. An end of the retainer extends underneath a retainer engaging wall, thus resisting movement of the lock out of the opening.

Abstract: A locking assembly has two members which are moveable into coupling engagement with one another. The two members have lock engaging walls, and one of the members has an opening between the lock engaging walls for receiving a lock. The lock comprises a lock body and a retainer. The lock body has a channel for receiving a portion of the retainer. An end of the retainer extends underneath a retainer engaging wall, thus resisting movement of the lock out of the opening.

Abstract: A locking assembly has two members which are moveable into coupling engagement with one another. The two members have lock engaging walls, and one of the members has an opening between the lock engaging walls for receiving a lock. The lock comprises a lock body and a retainer. The lock body has a channel for receiving a portion of the retainer. An end of the retainer extends underneath a retainer engaging wall, thus resisting movement of the lock out of the opening.

Abstract: A lock assembly for a surface subject to abrasive wear including a base element and a wear element coupled either by conforming T-shaped elements or dovetails and which includes a lock resiliently urged against an integral keeper in the base or wear element.

Abstract: A tree saw includes a frame adapted to be attached to the boom of a prime mover, a tree clamping mechanism on the frame, and a carriage assembly on the frame below the clamping mechanism. The carriage assembly includes a generally plate-like chassis, a generally U-shaped bulkhead upstanding from the chassis and providing a recessed base portion and forwardly-extending arm portions, and a slide mechanism on the arm portions. A rail mechanism on the frame receives the slide mechanism for reciprocating movement of the carriage assembly. A hydraulic cylinder assembly interconnects the bulkhead and frame for reciprocating the carriage assembly. An annular rim member rotatably mounted on the chassis has a geared inner circumference and a toothed outer circumference projecting forwardly of the base portion. A motor-driven pinion mechanism on the chassis engages the rim member inner circumference to rotate the rim member.

Abstract: A hydraulic snubber suitable for a skidding grapple or the like in which a twisted figure eight housing is provided to oppose free swinging in two mutually perpendicular horizontal directions, each portion of the figure eight having a cylinder housing with a rotor, each rotor having radially extending vanes. At least one vane has a flexible extension including at least two orifices equipped with a pocket for adjustably limiting the flow of hydraulic fluid to each respective side of the vane. The cylinder housing is equipped with a safety relief valve so that hydraulic fluid can bypass a vane to prevent excessive pressure buildup on one side of the vane.

Abstract: A hydraulic snubber suitable for a skidding grapple or the like in which a twisted figure eight housing is provided to oppose free swinging in two mutually perpendicular horizontal directions, each portion of the figure eight body having a cylinder housing a rotor with each rotor and cylinder having radially extending vanes equipped with flexible, orifice equipped vane extensions.

Abstract: A mounting and actuating apparatus for the tongs of a grapple wherein a pair of pulleys carrying the tongs are interconnected by cable means extending between the pulleys in generally figure eight configuration, one embodiment teaching driving one pulley by a fluid pressure cylinder positioned between the pulleys and utilizing axially offset cable links, the other embodiment including a multiplying linkage between the two tongs.