Abstract: A two-stage pump assembly employs a rotary-type gerotor pump combined with a reciprocating axial piston-type pump both mounted on and driven by a common shaft of a motor. A single key drivingly connects the rotor of the gerotor pump and the angle plate of the axial piston pump to the shaft of the motor for simultaneous operation of the two pumps. A wear sleeve is seated on the shaft of the motor and coacts with an oil seal carried by a common wall between the motor and the gerotor housing to prevent leaking of the fluid being pumped.

Abstract: A swing clamp having a clamp arm pivotally mounted on a rotatable pivot shaft for movement between operative and inoperative positions and with the rotation of the pivot shaft being under the control of a pair of oppositely-acting pistons engageable with a crescent-shaped cam integral with the pivot shaft. Externally adjustable stops control the action of the pistons and limit the forces applied to the pivot shaft. The body of the swing clamp has two sets of passages alternately usable for controlling the direction of operation of the swing clamp and including a relocatable sequence valve.

Abstract: A three-way control valve for a single-acting cylinder or other type of motor in which a valve body has an inlet port, a tank port and a control port, with a pair of poppet-type check valves operable to block flow from the control port to either the inlet port or the tank port. A poppet valve member is operable to control flow between the inlet port and the tank port. Means are provided for operating the poppet valve member and the check valves to cause either advance, return or hold operations of the cylinder and with decompression means for bleeding-off the cylinder pressure prior to opening of one of the check valves to connect the control port to the tank port to reduce the amount of force required to open the latter check valve.

Abstract: A portable timber felling device for controlled felling of a tree including a hydraulic ram unit positionable in a backcut of the tree for extension therein to fell the tree. A hydraulic power unit includes a pump and control valves to generate and regulate the hydraulic power required to operate the hydraulic ram unit. A hose means of a considerable length interlinks the power and ram units for the transmission of the generated hydraulic power. A remote control unit with a manually operable control member controls at least one of the valves on the power unit via a communication means which places the operator of the remote control at a substantial distance from the power unit and the tree to be felled. The entire structure is portable and a battery provides the electrical power for remote control.

Abstract: A waste compactor having a casing with an opening in the front wall thereof with a wheeled cart movable into the casing and holding a container to receive waste material with means for locking the cart to the casing, a loading chute carried by the cart and compacting structure in the casing including a fluid operated movable disc having a downwardly concave contour to have compacting forces acting radially inwardly toward the centerline of the compacting force and exerting a predetermined maximum pressure for a sufficient period of time to impart a "set" to the waste material in the container carried by the cart.

Abstract: 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 against the sides of the two series of pins to provide frictional engaging forces between locking pins to resist the vertical force of the load of the workpiece against the adjustable work support.

Abstract: A three-way control valve for a single-acting cylinder or other type of motor in which a valve body has an inlet port, a tank port and a control port, with a pair of poppet-type check valves operable to block flow from the control port to either the inlet port or the tank port. A poppet valve member is operable to control flow between the inlet port and the tank port. Means are provided for operating the poppet valve member and the check valves to cause either advance, return or hold operations of the cylinder and with decompression means for bleeding-off the cylinder pressure prior to opening of one of the check valves to connect the control port to the tank port to reduce the amount of force required to open the latter check valve.