Abstract: An auto cycle pump in accordance with the invention includes a housing having a reservoir for storing hydraulic fluid. A hydraulic pump in the housing provides hydraulic flow. A directional valve has neutral, advance and retract positions to respectively restrict hydraulic flow, direct hydraulic flow to an advance port and direct hydraulic flow to a retract port, the ports for hydraulic connection to the hydraulic tool, in use. Fluid conduits are provided connecting the pump and reservoir to the directional valve. A flow switch detects return flow from the directional valve to the reservoir. A pressure sensor sense hydraulic pressure from the pump. A dump valve is operatively connected to the pump for directing hydraulic flow back to the reservoir when the directional valve is in the neutral position. A control is operatively connected to the pump, the directional valve, the flow switch and the pressure sensing means for controlling operation of the auto cycle pump in automatic mode of operation.

Abstract: A combination hydraulic pressure regulator and pressure switch includes a housing having an interior chamber connecting an inlet port to an outlet port. A seating device is movably received in the interior chamber and has a seat surrounding an opening. The opening is in communication with the outlet port. A poppet is movable in the interior chamber. An adjustment spring normally urges the poppet into engagement with the seat to close the opening, the poppet being movable in a direction away from the seat in response to hydraulic pressure in the interior chamber sufficient to overcome the force of the adjustment spring. A limit switch is mounted to the body. A switch actuator is associated with the poppet for actuating the limit switch in response to movement of the poppet in a direction away from the seat.

Abstract: A control valve for controlling the flow of fluid to and from a single-acting cylinder and having a metered flow-controlling valve section and a rotatable valve member movable to four different positions to provide four different operations of the single-acting cylinder, namely: rapid advance, slow metered advance, hold and return.

Abstract: An air-hydraulic pump wherein an air-motor drives the pump. The air-motor includes a reciprocal piston which is driven in one direction by fluid under pressure and is returned by a spring. A control valve is utilized to control the action of fluid under pressure on the piston with the control valve having an open position which is maintained by trapped fluid pressure within a piston chamber in which the control valve is positioned. The control valve is closed by physical contact thereof with an end wall of the cylinder movably mounting the piston at the end of the return stroke and a resilient member is positioned adjacent the cylinder end wall to maintain the control valve in closed position for a portion of the piston stroke as it moves away from the cylinder end wall in the pumping stroke to avoid a possible stall condition for the motor.