Abstract: A pump system includes: a housing with a pump and an electric motor therein; a pump inlet with a pump inlet port; a pump outlet with a pump outlet port; a drive shaft rotatably driven by the electric motor, for driving the pump to pressurize fluid received through a main path of the pump from the pump inlet for output from an outlet path to the pump outlet; and a controller having a sensor. A portion of the pressurized fluid is directed to an auxiliary circuit for temperature measurement to provide an internal temperature check point of fluid within the system. The sensor is exposed to the auxiliary path, with or without use of a heat sink. Fluid is redirected to a return path for motor cooling and then a secondary path through the housing to return to the outlet path or the pump inlet.

Abstract: A vane pump has a rotor and a control slide mounted within an internal chamber of a housing. The rotor has a number of vane mounting openings and vanes. Rotation of the rotor generates a pressure differential between inlet and outlet ports of the pump to draw fluid in and output the fluid out. Both the vane mounting openings and vanes are arranged in pairs that are diametrically opposed to one another with respect to the rotor axis. The vanes in each said pair have an intermediate transfer member extending therebetween that shifts with one vane of each said pair retracting radially inwardly by engagement with the internal surface of the rotor receiving space for extension of the opposing vane of each said pair radially outwardly toward the internal surface of the rotor receiving space. The intermediate transfer member may be a pin provided between the vanes of the pair.

Abstract: An epitrochoidal vacuum pump includes a housing having a chamber, a rotor rotatably received within the internal space of the chamber, and a drive shaft configured to rotate the rotor eccentrically about an axis within the chamber in an epitrochoidal manner. An externally toothed guide sprocket meshes with and guides movement of a guide gear of the rotor as it is driven by the drive shaft. A chamber inlet draws air under negative pressure into the housing, and an outlet is provided to expulse air under positive pressure from the housing. Further, a fluid inlet is provided to input lubricant along the drive shaft and into the internal space of the chamber. The fluid inlet is communicated by channel(s) in an interior of the housing. The lubricant is drawn into the housing via a pressure differential.