Certain exemplary embodiments can provide a piston comprising a piston head, a connecting rod coupled to the piston head, a stabilizer bar, a retaining ring, and a stabilizer bar collar. The stabilizer bar collar defines one or more apertures. The one or more apertures are constructed to receive the stabilizer bar. The piston is constructed to reduce energy losses in an engine comprising the piston.

Certain exemplary embodiments can provide a piston comprising a piston head, a connecting rod coupled to the piston head, a stabilizer bar, a retaining ring, and a stabilizer bar collar. The stabilizer bar collar defines one or more apertures. The one or more apertures are constructed to receive the stabilizer bar. The piston is constructed to reduce energy losses in an engine comprising the piston.

The present invention discloses a power head of a vertical reciprocating pump with multi-spherical connection, and a water injection pump using the same, which includes a hydraulic end, a centralizing sleeve, an adjustable ball seat, a circular pull-back plate, pull rods of the power head, and a hydraulic end, an integrated base and the alike. By using the structure with multiple movable spherical surfaces, the error of the oblique disk during its motion along the elliptic trajectory can be eliminated. The power end can be linked with hydraulic ends and can be applied to boosting water injection processes for feeding liquid at low pressure or feeding liquid at high pressure in oil fields and various high-pressure liquid delivery fields. The fast on-site installation of the water injection pump of the present invention can be realized by the integrated base, so as to save the investment and improve the safety factor.

The present invention discloses a power head of a vertical reciprocating pump with multi-spherical connection, and a water injection pump using the same, which includes a hydraulic end, a centralizing sleeve, an adjustable ball seat, a circular pull-back plate, pull rods of the power head, and a hydraulic end, an integrated base and the alike. By using the structure with multiple movable spherical surfaces, the error of the oblique disk during its motion along the elliptic trajectory can be eliminated. The power end can be linked with hydraulic ends and can be applied to boosting water injection processes for feeding liquid at low pressure or feeding liquid at high pressure in oil fields and various high-pressure liquid delivery fields. The fast on-site installation of the water injection pump of the present invention can be realized by the integrated base, so as to save the investment and improve the safety factor.

To provide a brake hydraulic pressure control apparatus capable of simplifying a measure against NVH and downsizing an outer shape of the apparatus.

The brake hydraulic pressure control apparatus that controls a hydraulic pressure in each of plural systems of hydraulic circuits includes: a pressure supply unit that includes a motor and a pump element; and a hydraulic block that includes an oil channel connected to the pressure supply unit and control valves regulating the hydraulic pressure of each of the plural systems of the hydraulic circuits. The pressure supply unit includes: the motor including a stator and a rotor; a swash plate arranged to be tilted with respect to an axial direction of a rotation axis of the rotor; and the pump element having plural pump sections driven by rotation of the motor. At least a part of the pump element is arranged in the rotor.

To provide a brake hydraulic pressure control apparatus capable of simplifying a measure against NVH and downsizing an outer shape of the apparatus.

The brake hydraulic pressure control apparatus that controls a hydraulic pressure in each of plural systems of hydraulic circuits includes: a pressure supply unit that includes a motor and a pump element; and a hydraulic block that includes an oil channel connected to the pressure supply unit and control valves regulating the hydraulic pressure of each of the plural systems of the hydraulic circuits. The pressure supply unit includes: the motor including a stator and a rotor; a swash plate arranged to be tilted with respect to an axial direction of a rotation axis of the rotor; and the pump element having plural pump sections driven by rotation of the motor. At least a part of the pump element is arranged in the rotor.

A multi-stage electric gas pump includes a driving mechanism and an eccentric shaft including a main body having a longitudinal axis, a first eccentric portion, and a second eccentric portion, wherein the first eccentric portion and the second eccentric portion are fixed on the main body. The eccentric shaft is driven by the driving mechanism to produce a first circular movement of the first eccentric portion around the longitudinal axis and a second circular movement of the second eccentric portion around the longitudinal axis, wherein the second circular movement is synchronized with the first circular movement. The multi-stage electric gas pump further includes a first cylinder, a second cylinder, and a third cylinder. The cylinders in three stages are driven by the eccentric shaft so as to achieve three-stage pressurization of gas.

A multi-stage electric gas pump includes a driving mechanism and an eccentric shaft including a main body having a longitudinal axis, a first eccentric portion, and a second eccentric portion, wherein the first eccentric portion and the second eccentric portion are fixed on the main body. The eccentric shaft is driven by the driving mechanism to produce a first circular movement of the first eccentric portion around the longitudinal axis and a second circular movement of the second eccentric portion around the longitudinal axis, wherein the second circular movement is synchronized with the first circular movement. The multi-stage electric gas pump further includes a first cylinder, a second cylinder, and a third cylinder. The cylinders in three stages are driven by the eccentric shaft so as to achieve three-stage pressurization of gas.

A fluid pump is proposed. The fluid pump includes: a housing having an operation space and having connection ports disposed at a side in the operation space to discharge working fluid and suctioning working fluid from the outside; a swash plate coupled to the housing at an opposite side to the connection ports and having an inclined surface on a top facing the operation space; a cylinder block disposed in the operation space to be rotated by a driving shaft and having several cylinder rooms therein that extend in parallel with the driving shaft.

A fluid pump is proposed. The fluid pump includes: a housing having an operation space and having connection ports disposed at a side in the operation space to discharge working fluid and suctioning working fluid from the outside; a swash plate coupled to the housing at an opposite side to the connection ports and having an inclined surface on a top facing the operation space; a cylinder block disposed in the operation space to be rotated by a driving shaft and having several cylinder rooms therein that extend in parallel with the driving shaft.