Patent · US Active

Pressure back-up valve

US11105416B2 · kind B2 · utility

1Cited by

4References

16Claims

0Family size

Assignee

ZF FRIEDRICHSHAFEN AG · DE

Inventors

Florian Langenbacher · Kreßbronn, DE
Tobias Schmidt · Munich, DE
Hans-Joachim Martin · Kreßbronn, DE
Rainer Novak · Bregenz, AT

Key dates

Filing date	Jun 12, 2020
Grant date	Aug 31, 2021
Priority date	—
Expiry date	Jun 12, 2040

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF16H2061/0279
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

A pressure back-up valve (300) includes a release piston (320) movable between first and second stop positions and a closing body (340) movable to a closing position in which this separates first and second connection pressure chambers (327, 326) when the release piston (320) is in a first stop position. The release piston (320) moves the closing body (340), in the second stop position, into an opening position. The release piston (320) is pressurizable on a first pressure surface (A1) from a first side via a third connection pressure chamber (324) and on a second pressure surface (A2) from a second side via a second connection pressure chamber (326). The closing body (340) is pressurized, in the closing position, from a first side via the second connection pressure chamber (326) on a first pressure surface (A4) and from a second side via the first connection pressure chamber (327) on a second pressure surface (A3) of the closing body (34).

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