A pump comprises a frame and a docking platform connected to the frame. A motor is mounted to the docking platform and has a rotatable drive shaft extending therefrom. Roller bearings are mounted to cross beams attached to the frame. A vertically reciprocable slide bar driven is reciprocable through the at least one pair of roller bearings. A pump rod connector is attached to the slide bar and connectable to a pump rod extending into a well.

A pump comprises a frame and a docking platform connected to the frame. A motor is mounted to the docking platform and has a rotatable drive shaft extending therefrom. Roller bearings are mounted to cross beams attached to the frame. A vertically reciprocable slide bar driven is reciprocable through the at least one pair of roller bearings. A pump rod connector is attached to the slide bar and connectable to a pump rod extending into a well.

An outer gear and an inner gear expand and contract volume of pump chambers formed between both the gears, and rotate to suction fuel into the pump chambers and then discharge fuel from the pump chambers sequentially. The inner gear includes an insertion hole that is depressed along its axial direction. A joint member includes a main body portion that is fitted to a rotary shaft, a foot portion that extends from the main body portion along the axial direction and is inserted in the insertion hole with a clearance therebetween, and a protruding portion that protrudes from the foot portion toward a rotation progress side of the inner gear and has its width in the axial direction further narrowed toward a top portion of the protruding portion.

The disclosure relates to a pump assembly for a vehicle having an internal combustion engine with or without transmission or electric motor with transmission or for an oil supply having a double-pipe pump, wherein the two pipes are separated from each other and a second pipe can be connected to a first pipe, wherein the pump has at least one input drive point for an electric machine and also for a drive motor, including, for example, via a gearbox.

A uniaxial eccentric screw pump includes: a rotor 1 including a shaft body of a male screw type; a stator 2 having a through hole 2a of a female screw type through which the rotor 1 is inserted; a casing 3 connected to one end side of the stator 2; an end stud 4 connected, to the other end side of the stator 2; and a position adjusting member 5 that adjusts a relative position of the stator 2 with respect to the rotor 1 in an axial direction.

The disclosed technology includes pumps, pipes, valves, seals, and systems for pumping and controlling high temperature fluids, such as liquid tin, at temperatures of between 1000-3000 C. The systems and device may be partially or entirely constructed using brittle materials, such as ceramics, that are capable of withstanding extreme heat without significantly degrading, and may be secured using components made of refractory metals, such as tungsten. The systems and devices may utilize static and dynamic seals made from brittle materials, such as graphite, to enable the high temperature operation of such pumps, pipes, valves, and systems without leakage.

A coupling element for connecting a helix-shaped eccentric screw pump rotor to a drive shaft, with a drive shaft receiving portion and a rotor connecting portion arranged at an opposite end of the coupling element from the drive shaft receiving portion, the rotor connecting portion is constituted as a hollow cylinder for receiving a rotor end of the screw pump rotor, wherein the hollow cylinder has at least two inner circumferential surfaces which are complementary to the rotor and have a radius which is fixed with respect to the cross-sectional center of the hollow cylinder.

A gear pump that is used to pump fluid, such as oil, in a vehicle. The gear pump comprises a gear assembly having a drive shaft including a drive shaft key; a set of drive gears mounted on the drive shaft, with a drive gear of the set of drive gears being keyed with the drive shaft key; a driven shaft including a driven shaft key; a set of driven gears mounted on the driven shaft, with a driven gear of the driven gear set being keyed with the driven shaft key; and a torque drive feature associated with the drive shaft or the driven shaft, wherein the torque drive feature is configured to check keying with the driven shaft key.

Mobile means of transport (100) with a pump apparatus (1) and mobile pump apparatus (1) for use in mobile means of transport (100) such as semitrailers, tank trailers, tank semitrailers (101), tank trucks and trucks (102), comprising a drive motor (40) and a rotary piston pump (2). The drive motor (40) comprises a motor shaft (41) for driving the rotary piston pump (2). The rotary piston pump (2) comprises a housing (3) and two pump openings (4, 5) configured thereon, one of which serves as a pump inlet (4) and the other, as a pump outlet (5).

The rotary piston pump (2) comprises at least two rotor units (10, 20) rotatably accommodated in the housing (3) in a pump chamber (6) for conveying a fluid from the pump inlet (4) to the pump outlet (5). The two rotor units (10, 20) are accommodated on rotatably mounted rotor shafts (11, 21), each rotor shaft (11, 21) being equipped with a rotor gear wheel (12, 22) arranged outside the pump chamber (6). A drive pinion (32) of a drive shaft (31) of the rotary piston pump (2) is coupled to one of the rotor gear wheels (12). The motor shaft (41) of the drive motor (40) has a recess (81) at its front end (41a), where the drive shaft (31) of the rotary piston pump (2) is accommodated and coupled to the drive shaft (31).

An oil pump includes a pump housing, a pump shaft, and a pump rotor assembly. The pump housing is capable of forming a pump cavity. The pump cavity includes a first cavity and a second cavity. The pump rotor assembly is provided in the first cavity. At least part of the pump shaft is provided in the second cavity. The pump rotor assembly includes a first rotor and a second rotor. The first rotor is capable of rotating the second rotor, and is fixedly connected to the pump shaft. The pump shaft is capable of rotating the first rotor. The first rotor includes a connecting portion. A connecting hole is provided in the connecting portion. At least part of the pump shaft is provided in the connecting hole. At least part of the connecting portion engages with at least part of the pump shaft.