Patent · US Expired

Hydraulically unblockable non-return valve

US4562862A · kind A · utility

5Cited by

5References

9Claims

0Family size

Assignee

Mannesmann Rexroth AG · DE

Inventors

Norbert Mucheyer · Lohr am Main, DE
Heinz Schulte · Paderborn, DE

Key dates

Filing date	Dec 16, 1983
Grant date	Jan 7, 1986
Priority date	—
Expiry date	Dec 16, 2003

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T137/86984
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

A hydraulically unblockable non-return valve has a control piston (21), the control side of which can be connected with a control pressure medium source (35) and the other side of which can be connected with a supply container (33). In order to create a hydraulically unblockable non-return valve, in which the control side of the control piston does not need to be relieved of pressure, the other side of the control piston is perpetually connected with the supply container. Also provided is a throttle bore (27) which connects the two sides of the control piston with each other.

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