Patent · US Active

Hydraulic cylinder with end position damping

US10502242B2 · kind B2 · utility

0Cited by

7References

8Claims

0Family size

Assignee

KOMATSU MINING GERMANY GMBH · DE

Inventors

Henry Schwarz · Grand Rapids, US
Christian HESS · Bochum, DE
Oliver Martens · Marl, DE

Key dates

Filing date	Nov 12, 2013
Grant date	Dec 10, 2019
Priority date	—
Expiry date	Nov 7, 2034

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF15B2211/755
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

A hydraulic cylinder includes a cylinder having axially spaced-apart first and second bores, and a piston having a piston rod and arranged in the cylinder for movement between two end positions and dividing the cylinder into a piston side and a piston-rod side. A hydraulic pump pumps hydraulic oil into the piston side to move the piston from one end position toward the other end position while hydraulic fluid is discharged from the piston-rod side via the first bore and a first outlet line. A throttling device is operably connected to the cylinder to throttle a flow of the hydraulic fluid as the piston moves past and seals the first bore so that hydraulic fluid is discharged via the second bore, thereby reducing a delivery amount of the hydraulic oil and thereby braking and damping a movement of the piston toward the other one of the end positions.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.