A high-pressure fuel pump includes a pump housing which defines a pumping chamber, a fuel inlet which allows low-pressure fuel into the pumping chamber, a fuel outlet which allows high-pressure fuel out of the pumping chamber, and a plunger bore which extends along an axis and opens into the pumping chamber. The high-pressure fuel pump also includes a pumping plunger which reciprocates within the plunger bore along the axis such that reciprocation of the pumping plunger within the plunger bore increase and decreases a volume of the pumping chamber. The pumping plunger includes a sealing ring groove which is concentric with the plunger bore, the sealing ring groove including a sealing ring therein which engages the plunger bore in an interference fit. A diametric clearance greater than 12 microns is provided between the pumping plunger and the plunger bore.

A high-pressure fuel pump includes a pump housing which defines a pumping chamber, a fuel inlet which allows low-pressure fuel into the pumping chamber, a fuel outlet which allows high-pressure fuel out of the pumping chamber, and a plunger bore which extends along an axis and opens into the pumping chamber. The high-pressure fuel pump also includes a pumping plunger which reciprocates within the plunger bore along the axis such that reciprocation of the pumping plunger within the plunger bore increase and decreases a volume of the pumping chamber. The pumping plunger includes a sealing ring groove which is concentric with the plunger bore, the sealing ring groove including a sealing ring therein which engages the plunger bore in an interference fit. A diametric clearance greater than 12 microns is provided between the pumping plunger and the plunger bore.

A fuel pump module which may be easily assembled and mounted in a flat bombe having a small height in an LPG vehicle, may have a structure in which a reservoir cup may be rotated and restored with respect to a plate by support bars and springs, so that the fuel pump module may be easily assembled and mounted even in a flat bombe having a small height. Furthermore, members for blocking noise and absorbing vibration are combined with a fuel pump, so noise and vibration may be reduced when the pump is operated.

The present disclosure provides a high-pressure fuel pump having barrel sets comprising offset, opposing barrel units within the same plane and having plungers disposed therein. The high-pressure fuel pump further includes a camshaft having at least one offset lobe and a cam ring encircling the lobe and in contact with the plungers, which translate the rotational movement of the camshaft to longitudinal movement of the plungers, controlling inflow, compression, and outflow of fuel within the pump.

A diaphragm pump includes a pump head, a pump drive, a socket formed on the pump head configured to be releasably fixed to a mounting formed on the pump drive via a rotary closure, wherein the rotatory closure includes a securing device that includes a pushrod which is received in the mounting and is configured to be biased by a spring via a lever and engages in a positive-locking manner into a bore formed on the socket for locking.

The present invention concerns an axial piston pump (1, 1′, 1″,1′″) for the pumping of a liquid comprising: a head (20) in which there is at least partially made a plurality of cylinders (25) in a number greater than three, with central axes parallel between them, a plurality of pistons (75) each of which slide in a respective cylinder (25) of the plurality of cylinders (25) for the pumping of the liquid, and a suction channel of the liquid to pump, which is equipped with a primary duct (140) and a plurality of branch ducts (145, 145′,145″), each of said branch ducts (145, 145′,145″) being adapted to place the primary duct (140) in fluid communication with a respective cylinder (25) of the plurality of cylinders (25), in which the primary duct (140) is positioned between the central axes of the cylinders (25).

The present invention relates to an axial piston pump (1,1′) with inclined plate for pumping a liquid comprising: a head (20) in which there are at least partially a plurality of cylinders (25) in a number greater than three, with parallel central axes, a plurality of pistons (75), each one sliding inside a respective cylinder (25) of the plurality of cylinders (25) for pumping liquid, a housing seat of a suction valve (115) made in the head (20), a housing seat of a delivery valve (120) made in the head (20). The housing seat of the suction valve (115) and the housing seat of the delivery valve (120) are in direct fluid communication with each other via a rectilinear channel (155) made in the head, said channel in turn being in direct fluid communication with a cylinder (25) of the plurality of cylinders.

This describes an axial piston pump (1, 1′) with inclined plate for pumping a liquid comprising: a head (20) in which there are at least partially made a plurality of cylinders (25a, 25b, 25c, 25d, 25e) in a number greater than three, with central axes parallel to each other, a plurality of pistons (75) each one sliding in a respective cylinder (25a, 25b, 25c, 25d, 25e) of the plurality of cylinders (25a, 25b, 25c, 25d, 25e) for pumping liquid, a plurality of suction valves (115), each one housed in a respective housing seat made in the head (20), a plurality of suction channels (155a, 155b, 155c, 155d, 155e) made in the head, one for each suction valve (115), each of which, independently from the other suction channels, places a housing seat of a suction valve (115) in fluid communication with the corresponding cylinder (25a, 25b, 25c, 25d, 25e), a plurality of delivery valves (120), each one housed in a respective housing seat made in the head (20), a plurality of delivery channels (160a, 160b, 160c, 160d, 160e) made in the head, one for each delivery valve (120), each of which, independently from the other delivery channels, places a cylinder (25a, 25b, 25c, 25d, 25e) in fluid communication with the housing seat of the corresponding delivery valve (120).

This describes an axial piston pump (1, 1′) with inclined plate for pumping a liquid comprising: a head (20) in which there are at least partially made a plurality of cylinders (25a, 25b, 25c, 25d, 25e) in a number greater than three, with central axes parallel to each other, a plurality of pistons (75) each one sliding in a respective cylinder (25a, 25b, 25c, 25d, 25e) of the plurality of cylinders (25a, 25b, 25c, 25d, 25e) for pumping liquid, a plurality of suction valves (115), each one housed in a respective housing seat made in the head (20), a plurality of suction channels (155a, 155b, 155c, 155d, 155e) made in the head, one for each suction valve (115), each of which, independently from the other suction channels, places a housing seat of a suction valve (115) in fluid communication with the corresponding cylinder (25a, 25b, 25c, 25d, 25e), a plurality of delivery valves (120), each one housed in a respective housing seat made in the head (20), a plurality of delivery channels (160a, 160b, 160c, 160d, 160e) made in the head, one for each delivery valve (120), each of which, independently from the other delivery channels, places a cylinder (25a, 25b, 25c, 25d, 25e) in fluid communication with the housing seat of the corresponding delivery valve (120).

A retainer assembly and plug for a fluid end of a pump system includes a retainer body. A plurality of tongues are movably arranged about the retainer body. The tongues are moveable between a pre-installed configuration and an installed configuration depending on the position of the retainer body relative to the tongues. In the installed configuration engaging flanges of the tongues are positioned in a retaining channel formed in a bore of the fluid end and retain the retainer assembly to the fluid end. A plug is configured to sealingly fit to the bore of the fluid end inboard of the retainer assembly and a locking mechanism is configured to secure the retainer assembly to the plug, and when so secured, the position of the retainer body is maintained relative to the plurality of tongues and the retainer assembly is maintained in the installed configuration.