公开(公告)号：US12209667B2

公开(公告)日：2025-01-28

申请号：US17740569

申请日：2022-05-10

Applicant: CATERPILLAR INC.

Inventor： Ananda Sudhakar Ponnusamy ,  Rameshkrishnan Lakshminarayanan ,  Justin Douglas Speichinger ,  Cody Patrick Renshaw ,  Jaime E. Ruiz

IPC: F16J15/32 ,  F15B15/14 ,  F16J15/16 ,  F16J15/3232

Abstract: A combination of seals and wear guides for use in a hydraulic cylinder provides a sealed engagement between a piston rod of the hydraulic cylinder and an inner circumferential surface of a rod end of a cylinder barrel of the hydraulic cylinder through which the piston rod is axially movable. The combination includes a cylindrical metallic wear guide for seating within a first annular groove formed around the inner circumferential surface, a buffer seal assembly including an annular buffer seal cooperatively mated with an annular backup ring for seating within a second annular groove, a U-cup seal for seating within a third annular groove, a cylindrical plastic wear guide for seating within a fourth annular groove, and a triple lip wiper seal including three ringed lip portions for seating within a fifth annular groove.

公开(公告)号：US20230366466A1

公开(公告)日：2023-11-16

申请号：US17740569

申请日：2022-05-10

Applicant: CATERPILLAR INC.

Inventor： Ananda Sudhakar Ponnusamy ,  Rameshkrishnan Lakshminarayanan ,  Justin Douglas Speichinger ,  Cody Patrick Renshaw ,  Jaime E. Ruiz

IPC: F16J15/3232 ,  F15B15/14 ,  F16J15/16

CPC classification number: F16J15/3232 ,  F15B15/1452 ,  F16J15/166

Abstract: A combination of seals and wear guides for use in a hydraulic cylinder provides a sealed engagement between a piston rod of the hydraulic cylinder and an inner circumferential surface of a rod end of a cylinder barrel of the hydraulic cylinder through which the piston rod is axially movable. The combination includes a cylindrical metallic wear guide for seating within a first annular groove formed around the inner circumferential surface, a buffer seal assembly including an annular buffer seal cooperatively mated with an annular backup ring for seating within a second annular groove, a U-cup seal for seating within a third annular groove, a cylindrical plastic wear guide for seating within a fourth annular groove, and a triple lip wiper seal including three ringed lip portions for seating within a fifth annular groove.