A pump system includes a pump, a mounting bracket, and three fastener assemblies. The pump includes a housing having three pump attachment features. The mounting bracket includes three bracket attachment features. The three fastener assemblies are each coupled to one of the pump attachment features and to one of the bracket attachment features to form an attachment. Each of three extend through the pump attachment feature, the bracket attachment feature, and the fastener assembly at each attachment. The three attachment axes are perpendicular to each other.

The cluster block accommodates connection terminals and has conductive member insertion holes, into which the conductive members are inserted. The cluster block is disposed between the bottom wall of the housing and second coil ends. The conductive member insertion holes are located on the radially outer side of the inner circumferential surface of the stator core. The cluster block includes a second wall portion in the vicinity of the electric motor and a first wall in the vicinity of the bottom wall of the housing. The second wall portion has a pressed surface on the radially inner side of the inner circumferential surface of the stator core. The outer surface of the first wall portion has a contact surface that is lined up with the pressed surface in the axial direction of the stator core. The contact surface is allowed to contact the bottom wall of the housing.

A scroll compressor is provided which includes: a revolving scroll, a fixed scroll, an autorotation preventing mechanism, a frame, a crank shaft provided with an eccentric pin portion which is eccentric with respect to an axis, the crank shaft being provided with a flange portion at a lower portion of the eccentric pin portion, the flange portion being larger than the diameter of the eccentric pin portion, a balance weight mounted on the flange portion, a sealing member performing sealing between the revolving scroll and the flange portion, and a thrust bearing arranged between the frame and the flange portion. The scroll compressor reduces the amount of oil flowing into a back pressure chamber, thereby improving the performance of the scroll compressor.

An electric compressor includes: a driving part being a driving source configured to generate a rotating force of the electric compressor, the driving part including a stator; a motor housing surrounding the driving part, the motor housing including: one or more first mounting lugs installed on an outer surface of the motor housing; and a press fitting portion formed on an inner surface of the motor housing, the stator of the driving part is press fitted into the press fitting portion; a rear housing surrounding a compressing part configured to rotate due to a rotational driving force generated by the driving part so as to compress a refrigerant; and a center housing installed between the motor housing and the rear housing, wherein the first mounting lugs are installed spaced at a first distance from a center of gravity of the electric compressor overlapping with the press fitting portion.

A water pump for a marine engine includes a cap covering an internal cavity of the pump's housing when the pump is operating. The cap functions as a tool to remove a damaged or worn impeller from inside the internal cavity. A threaded hub of the cap engages internal threads of the impeller to assist a user in removing the impeller for replacement. A cap lock ring threaded onto the pump housing retains the cap over the internal cavity. A rotatable drive shaft has splines which mate with a splined portion of the impeller to rotate the impeller. The cap lock ring is disengaged from the housing and the cap removed to enable a person to use the threaded hub of the cap to remove the impeller.

A rotary compressor including a cylindrical compressor housing provided with an inlet unit of a refrigerant and a discharging unit of the refrigerant, a compressing unit which is disposed inside the compressor housing and includes a cylinder and a piston for compressing the refrigerant sucked in from the inlet portion, a rotation shaft provided with the piston of the compressing unit, and a motor which includes a cylindrical stator and a rotor that is provided on another end side of the rotation shaft and that rotates inside the stator, and which drives the compressing unit via the rotation shaft, in which an outer circumferential portion of the stator includes a concave portion and is fixed to an inner circumferential portion of the compressor housing in a transition fit state, and in which the compressor housing includes a weld portion which is joined to the concave portion of the stator.

A method for operating a progressive cavity pump wherein the stator has at least first and second active stator sections that are at different locations on the stator, comprising inserting a first rotor having a first active rotor section that is aligned with the first active stator section, and rotating the first rotor relative to the first active stator section such that the aligned first active rotor and stator sections generate a pumping force. Subsequently, the first rotor is removed and a second rotor is inserted having a second active rotor section that is aligned with the second active stator section, and rotating the second rotor relative to the second active stator section such that the aligned second active rotor and stator sections generate a pumping force.

A vane pump includes: a rotor connected to a driving shaft; a plurality of vanes provided so as to be capable of reciprocating in a radial direction with respect to the rotor; a cam ring having a cam face on which a tip-ends of the vanes slide with the rotation of the rotor, the cam ring being provided so as to be capable of being made eccentric with respect to the rotor; a second pump body configured to accommodate the cam ring; and a spring interposed between the cam ring and the second pump body in a compressed state, the spring being configured to bias the cam ring in the direction in which the amount of eccentricity with respect to the rotor is increased. The cam ring and the second pump body have seating surfaces on which the spring is seated and grooves formed in the seating surfaces.

A scroll accommodation portion (3b) for accommodating a driving-side scroll member (70), a driven-side scroll member (90), a first support member (33), and a second support member (35) is provided. The first driving-side scroll portion (71) and a second driving-side scroll portion (72) are fixed by a wall fixing bolt (31). The driven-side scroll member (90) and the second support member (35) are fixed by a second support fixing bolt (36). The scroll accommodation portion (3b) is formed with an access hole (3b1) accessible to the wall fixing bolt (31) and the second support fixing bolt (36).

A compressor and a method of assembling the compressor are provided. The compressor includes: a shell; a motor arranged in the shell, the motor having a stator, a spacer mounted with a first bearing therein, a drive shaft supported by the first bearing and a rotor fixed onto the drive shaft; a low bearing support; a positioning member positioning the second bearing and being connected to the low bearing support; and a second bearing connected to the positioning member and/or the low bearing support and supporting the drive shaft. Furthermore, the positioning member may be removed from or maintained in the compressor after it is assembled. The present disclosure can avoid the adverse effects of the gravity of the rotor and the drive shaft and/or the magnetic force between the rotor and the stator on positioning the bearings and the drive shaft and can improve positioning accuracy and assembling efficiency.