Patent · US Expired

Bypass valve

US5048396A · kind A · utility

4Cited by

2References

16Claims

0Family size

Assignee

Mannesmann Rexroth AG · DE

Inventors

Heinz Torkler · Lohr am Main, DE
Werner Peschel · Lohr am Main, DE

Key dates

Filing date	Jun 29, 1988
Grant date	Sep 17, 1991
Priority date	—
Expiry date	Jun 29, 2008

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T137/87378
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

In the neutral position of a directional control valve in which the connection of the constant pump to the consumer is interrupted the entire delivery of the constant pump is led via a bypass valve to the tank. According to the invention the regulating range of the bypass valve is increased by an additional connection which is controlled by a further piston which in the neutral position of the directional control valve is displaced by a weak spring into the open position and thus ensures a pressureless circulation of the pump working medium to the tank.

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