US 2026/0243250 A1Published application

Connecting rod-crosshead assembly, and plunger pump

AssigneeYantai Jereh Petroleum Equipment & Technologies Co., Ltd.

InventorsWenping CUI, Yanjing SUN, Zimeng GUO, Xiaosong WEI, Xiaobin LI

Life of this patent

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Abstract

A crosshead assembly includes a crosshead, a connecting rod, and a pin shaft. The crosshead is provided with an arc-shaped groove, and the crosshead is further provided with a first mounting hole. One end of the connecting rod has a circular arc shape and is disposed in the arc-shaped groove; the connecting rod is further provided with a second mounting hole corresponding to the first mounting hole; a first oil hole penetrates through the connecting rod in a length direction of the connecting rod. The pin shaft extends into the first mounting hole and the second mounting hole, such that the connecting rod is rotatably connected to the crosshead; the pin shaft is provided with a second oil hole, such that two first oil holes located at two ends of the second mounting hole are in communication.

Claims10

Dependent claims

A connecting rod-crosshead assembly, comprising:

a crosshead, provided with an arc-shaped groove, wherein the crosshead is further provided with a first mounting hole;
a connecting rod, one end of the connecting rod having a circular arc shape and being disposed in the arc-shaped groove, wherein the connecting rod is further provided with a second mounting hole corresponding to the first mounting hole, a first oil hole penetrates through the connecting rod in a length direction of the connecting rod, and an extension path of the first oil hole penetrates through the second mounting hole;
and
a pin shaft, extending into the first mounting hole and the second mounting hole, such that the connecting rod is rotatably connected to the crosshead, wherein the pin shaft is provided with a second oil hole, and the second oil hole communicates two first oil holes located at two ends of the second mounting hole.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 19/644,642Filed 10 Apr 2026
Priority: CN 202322732235.711 Oct 2023
Published: 20 Aug 2026
Term ends: Not estimatedThe source records don’t support an estimate.

Classification11 codes

F04B 53/144
Pistons, piston-rods or piston-rod connections: adaptation of piston-rods
F04B 9/02
Piston machines or pumps characterised by the driving or driven means to or from their working members: the means being mechanical
F04B 9/045
The means being cams, eccentrics or pin-and-slot mechanisms: the means being eccentrics
F04B 15/02
Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts: the fluids being viscous or non-homogeneous

Family

Application19/644,642Continuation
US 2026/0243250 A1This patent

From the US filing history. Foreign family members aren’t listed.

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