A compressor may include a crankshaft, first and second cylinder housings, first and second rotors, a divider plate, and first and second valves. The crankshaft includes first and second eccentric portions. The cylinder housings define cylindrical recesses. The rotors are disposed within respective cylindrical recesses and engage respective eccentric portions of the crankshaft. The first rotor and the first cylindrical recess define a first compression chamber therebetween. The second rotor and the second cylindrical recess define a second compression chamber therebetween. The divider plate may be disposed between the cylinder housings and may include first and second fluid openings in communication with the first and second compression chambers. The valves may be moveable relative to the divider plate between a first position allowing fluid flow through the fluid openings and a second position restricting fluid flow through the fluid openings.

An electric pump includes a housing 2 configured of a housing body 3 and a cover 4, a stator 6 having a plurality of coils 15, a rotor 7 configured of an inner side outer rotor 16 and an outer side rotor body 17, a pump part 8 disposed on the inner circumferential side of the rotor 7 of an electric motor 5, side plates 11 and 12 disposed on both side surfaces of the rotor 7, an inner rotor 9, and a plurality of connecting plates 10 interposed between the outer rotor 16 and the inner rotor 9. The side plate 12 of the side plates 11 and 12 is pressed to the rotor 7 by a compression coil spring 28.

An electric pump includes a housing 2 configured of a housing body 3 and a cover 4, a stator 6 having a plurality of coils 15, a rotor 7 configured of an inner side outer rotor 16 and an outer side rotor body 17, a pump part 8 disposed on the inner circumferential side of the rotor 7 of an electric motor 5, side plates 11 and 12 disposed on both side surfaces of the rotor 7, an inner rotor 9, and a plurality of connecting plates 10 interposed between the outer rotor 16 and the inner rotor 9. The side plate 12 of the side plates 11 and 12 is pressed to the rotor 7 by a compression coil spring 28.

An automotive pendulum-slider pump for providing a pressurized lubricant. The automotive pendulum-slider pump includes a non-rotatable rotor housing, a rotor ring which rotates within the rotor housing and which encloses a pumping chamber which includes a suction opening, a discharge opening, and an automatically switching pressure adaption valve, a rotor hub which is connected with the rotor ring to co-rotate therewith, and pendulum vanes which are arranged over a circumference of the rotor ring. The pendulum vanes are pivotably hinged via a respective pendulum hinge at the rotor ring. The pendulum vanes fluidically separate the pumping chamber into pumping compartments. The automatically switching pressure adaption valve of the pumping chamber pre-opens a fluidic connection between at least one of the pumping compartments and the discharge opening immediately before the at least one of the pumping compartments has arrived at the discharge opening.

An automotive pendulum-slider pump for providing a pressurized lubricant. The automotive pendulum-slider pump includes a non-rotatable rotor housing, a rotor ring which rotates within the rotor housing and which encloses a pumping chamber which includes a suction opening, a discharge opening, and an automatically switching pressure adaption valve, a rotor hub which is connected with the rotor ring to co-rotate therewith, and pendulum vanes which are arranged over a circumference of the rotor ring. The pendulum vanes are pivotably hinged via a respective pendulum hinge at the rotor ring. The pendulum vanes fluidically separate the pumping chamber into pumping compartments. The automatically switching pressure adaption valve of the pumping chamber pre-opens a fluidic connection between at least one of the pumping compartments and the discharge opening immediately before the at least one of the pumping compartments has arrived at the discharge opening.