Patent ID: 11965497
Assignee: CATERPILLAR INC.
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F  B | IPC B  F

Claim 0:
1. A fluid end of a reciprocating pump, the fluid end comprising:
a body defining a plunger bore, the body having a first inner diameter threaded surface and a second inner diameter threaded surface, wherein the first inner diameter threaded surface and the second inner diameter threaded surface are oriented on two offset interior surfaces of the body;
a plunger sleeve having a first threaded profile along an exterior-facing surface of the plunger sleeve, the first threaded profile configured for engagement with the first inner diameter threaded surface of the body, the plunger sleeve defining a throughbore configured to receive a plunger reciprocating within the plunger bore during operation of the reciprocating pump, the plunger sleeve including a first end and a second end, wherein the first end of the plunger sleeve is closer than the second end of the plunger sleeve to a power end of the reciprocating pump;
a packing assembly including at least one annular seal disposed between the plunger sleeve and the plunger; and
a packing nut having a second threaded profile along an exterior-facing surface of the packing nut within the plunger bore of the body, the second threaded profile being configured for engagement with the second inner diameter threaded surface of the body, the packing nut including a first end and a second end, wherein the first end of the packing nut is closer than the second end of the packing nut to the power end of the reciprocating pump, and
wherein the second end of the packing nut contacts the first end of the plunger sleeve within the fluid end.