A system includes a variable displacement pump (VDP) in fluid communication with an inlet line and with an outlet line. The VDP includes a variable displacement mechanism configured to vary pressure to the outlet line. A bypass valve (BPV) includes a BPV inlet in fluid communication with the outlet line, and a BPV outlet in fluid communication with a bypass line that feeds into the inlet line upstream of the VDP. The BPV includes a thermostatic actuator configured to control recirculation flow amount through the BPV based on fluid temperature in the BPV. A method includes thermostatically controlling a bypass valve (BPV) to recirculate flow from the outlet line to an input line of the VDP in the event of flow demanded by the downstream system dropping below a predetermined low threshold of flow through the VDP based on fluid temperature in the BPV.

A system includes a variable displacement pump (VDP) in fluid communication with an inlet line and with an outlet line. The VDP includes a variable displacement mechanism configured to vary pressure to the outlet line. A bypass valve (BPV) includes a BPV inlet in fluid communication with the outlet line, and a BPV outlet in fluid communication with a bypass line that feeds into the inlet line upstream of the VDP. The BPV includes a thermostatic actuator configured to control recirculation flow amount through the BPV based on fluid temperature in the BPV. A method includes thermostatically controlling a bypass valve (BPV) to recirculate flow from the outlet line to an input line of the VDP in the event of flow demanded by the downstream system dropping below a predetermined low threshold of flow through the VDP based on fluid temperature in the BPV.

A washing machine including a cabinet, a drum forming a laundry room, and a detergent supply apparatus, to supply detergent to the laundry room, and including a detergent container forming a detergent receiving space and a detergent pump coupleable to and decouplable from the detergent container and configured to pump detergent accommodated in the detergent receiving space. The detergent pump comprises a pumping portion including a compression space having a volume controllable to be varied such that the detergent accommodated in the detergent receiving space is drawn into an inner side of the detergent pump or is discharged to an outer side of the detergent pump as the volume of the compression space is varied. The detergent pump comprises a detergent discharge flow path connectable to the compression space to allow the detergent discharged from the compression space to move to the outer side of the detergent pump.

A washing machine including a cabinet, a drum forming a laundry room, and a detergent supply apparatus, to supply detergent to the laundry room, and including a detergent container forming a detergent receiving space and a detergent pump coupleable to and decouplable from the detergent container and configured to pump detergent accommodated in the detergent receiving space. The detergent pump comprises a pumping portion including a compression space having a volume controllable to be varied such that the detergent accommodated in the detergent receiving space is drawn into an inner side of the detergent pump or is discharged to an outer side of the detergent pump as the volume of the compression space is varied. The detergent pump comprises a detergent discharge flow path connectable to the compression space to allow the detergent discharged from the compression space to move to the outer side of the detergent pump.

A lubrication pump includes a housing defining a bore, an adjustable cylinder sleeve within the bore, and a piston slidably movable within the bore along a longitudinal axis of the bore. A connector may be drivingly interposed between a cam and the piston for driving the piston in reciprocating axial motion. The connector may have a coupling for engaging the piston, which may enable rotational engagement between the connector and the piston. The connector may have a roller for bearing engagement with the cam, which may enable the connector to rotate about the longitudinal axis relative to the housing as the connector moves axially within the bore. The cam may be laterally displaceable relative to the connector. The cylinder sleeve may be adjustable relative to the piston for varying lubricant fluid output flow. The cylinder sleeve and corresponding piston may be interchangeably disposed in the housing.

Disclosed is a device that includes a natural-gas compression system having a natural-gas powered combustion engine, a compression cylinder configured to receive natural gas and output compressed natural gas, a piston disposed in the compression cylinder and configured to translate through the compression cylinder in response to mechanical power received from the natural-gas powered combustion engine, and a variable-volume head mounted to the compression cylinder and configured to vary a compressed volume of the compression cylinder. In some instances, the variable-volume head includes a head body, an adjustment screw rotatably coupled to the head body, a plug moveable in threaded engagement with the adjustment screw, and an anti-rotation device coupled to the plug, the head body, or both. The anti-rotation device may be configured to impede the plug from rotating relative to the head body as the adjustment screw rotates.

Disclosed is a device that includes a natural-gas compression system having a natural-gas powered combustion engine, a compression cylinder configured to receive natural gas and output compressed natural gas, a piston disposed in the compression cylinder and configured to translate through the compression cylinder in response to mechanical power received from the natural-gas powered combustion engine, and a variable-volume head mounted to the compression cylinder and configured to vary a compressed volume of the compression cylinder. In some instances, the variable-volume head includes a head body, an adjustment screw rotatably coupled to the head body, a plug moveable in threaded engagement with the adjustment screw, and an anti-rotation device coupled to the plug, the head body, or both. The anti-rotation device may be configured to impede the plug from rotating relative to the head body as the adjustment screw rotates.

Devices for sealing and inflating inflatable objects, wherein the device has as a source of compressed gas a compressor unit, which is formed as a reciprocating piston compressor driven by a slider crank mechanism and has a piston moved in an oscillating manner in a cylinder, wherein the piston and the cylinder delimit a compression chamber and the cylinder is closed on the output side by a cylinder head with an outlet valve, wherein the device also has a reservoir for an automatic sealant that can be filled into the inflatable object and a valve-and-distributor unit for sealant and compressed gas, which connects the reservoir and the compressor unit and has a line that can be connected to the inflatable object, wherein the valve-and-distributor unit allows the device to be operated according to choice in the two operating modes inflate and feed sealant.

Devices for sealing and inflating inflatable objects, wherein the device has as a source of compressed gas a compressor unit, which is formed as a reciprocating piston compressor driven by a slider crank mechanism and has a piston moved in an oscillating manner in a cylinder, wherein the piston and the cylinder delimit a compression chamber and the cylinder is closed on the output side by a cylinder head with an outlet valve, wherein the device also has a reservoir for an automatic sealant that can be filled into the inflatable object and a valve-and-distributor unit for sealant and compressed gas, which connects the reservoir and the compressor unit and has a line that can be connected to the inflatable object, wherein the valve-and-distributor unit allows the device to be operated according to choice in the two operating modes inflate and feed sealant.

Devices for sealing and inflating inflatable objects, in particular for sealing and inflating motor vehicle tires, wherein the devices have as a source of compressed gas a compressor unit, which is formed as a reciprocating piston compressor driven by a slider crank mechanism and has a piston moved in an oscillating manner in a cylinder, and wherein the piston and the cylinder delimit a compression chamber and the cylinder is closed on the output side by a cylinder head with an outlet valve.