A hydraulic system for an aircraft. The hydraulic system can include a hydraulic actuator that is operatively coupled to a flight control member. Hydraulic fluid is moved through the hydraulic system by an engine driven pump that delivers hydraulic fluid to the actuator at a first pressure, and a boost pump that delivers hydraulic fluid to the actuator at a second pressure that is higher than the first pressure. The hydraulic system is configured such that the hydraulic fluid returning from the actuator to the engine driven pump can be delivered to the boost pump prior to reaching the engine driven pump.

A variable stroke high pressure pump is disclosed. The pump uses a wobble plate design with dynamically variable tilt to provide continuous adjustment of pump stroke length and output. Dynamically variable tilt is accomplished using a linearly actuated tilt thruster rotationally coupled to the drive shaft to maintain a selected tilt of the wobble plate through the rotation of the wobble plate.

In an adjustable coolant pump for delivering a coolant for a combustion engine, a delivery flow of the coolant can be limited by a regulating slide which is actuated by a hydraulic actuator in a hydraulic control loop, wherein the hydraulic control loop is supplied with the coolant from the delivery flow, and includes an axial piston pump and a proportional valve for generation and adjustment of a pressure on the hydraulic actuator. A sliding shoe, which is arranged on an intake side of the axial piston pump, surrounds an inlet of the axial piston pump, and a filter disk for filtering the coolant prior to entry into the hydraulic control loop is in sliding contact with the sliding shoe so that coolant from the pump chamber is sucked into the axial piston pump through the filter disk and the sliding shoe, while a rotational movement of the filter disk is transformed into a stroke movement of the axial piston pump. The filter disk consists of a ceramic material.

The present disclosure discloses a swashplate-type axial plunger pump with multi-channel oil feed and full-flow self-cooling and double-end-face flow distribution. The cooling oil suctioned by the plunger pump firstly cools the friction pair of the cylinder block and the plunger; then, one part of the cooling oil passes through a gap between the pump case and the cylinder block and enters the control chamber by passing by the friction pair of the oil distribution plate and the cylinder block to cool the friction pair of the oil distribution plate and the cylinder block; and the other part of the cooling oil passes through a gap between the pump case and the cylinder block and enters the control chamber by passing by the friction pair of the slipper and the swashplate to cool the friction pair of the slipper and the swashplate.

The present disclosure discloses a swashplate-type axial plunger pump with multi-channel oil feed and full-flow self-cooling and double-end-face flow distribution. The cooling oil suctioned by the plunger pump firstly cools the friction pair of the cylinder block and the plunger; then, one part of the cooling oil passes through a gap between the pump case and the cylinder block and enters the control chamber by passing by the friction pair of the oil distribution plate and the cylinder block to cool the friction pair of the oil distribution plate and the cylinder block; and the other part of the cooling oil passes through a gap between the pump case and the cylinder block and enters the control chamber by passing by the friction pair of the slipper and the swashplate to cool the friction pair of the slipper and the swashplate.

A control plate, for alternatingly fluidically connecting hydrostatic operating chambers, in particular of an oblique axis type axial piston machine, with pressure medium connections, includes a first end face, a second end face, at least a first recess, a first kidney-like control opening, and at least one through-recess. The first face extends transversely to a rotation axis. The second face faces away from the first face. The first recess is bounded in the first end face by the first control opening, and at least partially forms the at least one through recess, which extends toward the second end face from the first end face at an end portion of the first control opening, and which is arranged in or counter to a rotation direction of the rotation axis. An oblique axis construction type axial piston machine includes such a control plate.

A control plate, for alternatingly fluidically connecting hydrostatic operating chambers, in particular of an oblique axis type axial piston machine, with pressure medium connections, includes a first end face, a second end face, at least a first recess, a first kidney-like control opening, and at least one through-recess. The first face extends transversely to a rotation axis. The second face faces away from the first face. The first recess is bounded in the first end face by the first control opening, and at least partially forms the at least one through recess, which extends toward the second end face from the first end face at an end portion of the first control opening, and which is arranged in or counter to a rotation direction of the rotation axis. An oblique axis construction type axial piston machine includes such a control plate.

The present invention relates to a hydraulic pump system including a variable displacement pump that generates an outlet pressure. The hydraulic pump system also includes a control system that decreases a displacement volume of the variable displacement pump in response to an increase in the outlet pressure and increases a displacement volume of the variable displacement pump in response to a decrease in the outlet pressure.

A handheld sprayer (10) includes a fluid module (12′) mounted to a drive module (14′) at a static connection (16) and a dynamic connection (18′). The static connection (16) supportably attached the fluid module (12′) to the drive module (14). The dynamic connection (18′) connects a drive (84) of the drive module (14′) to a pump (24) of the fluid module (12) such that the drive (84) can power the pump (24) by the dynamic connection (18). The fluid contacting components of the handheld sprayer (10′) are in the fluid module (12′). The fluid module (12′) can be mounted to and dismounted from the drive module (14′) by a sliding motion.

A handheld sprayer (10) includes a fluid module (12′) mounted to a drive module (14′) at a static connection (16) and a dynamic connection (18′). The static connection (16) supportably attached the fluid module (12′) to the drive module (14). The dynamic connection (18′) connects a drive (84) of the drive module (14′) to a pump (24) of the fluid module (12) such that the drive (84) can power the pump (24) by the dynamic connection (18). The fluid contacting components of the handheld sprayer (10′) are in the fluid module (12′). The fluid module (12′) can be mounted to and dismounted from the drive module (14′) by a sliding motion.