Patent · US Expired

Device for venting a pump unit

US7029248B2 · kind B2 · utility

0Cited by

5References

9Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Armin Merz · Landgut Burg, DE
Walter Fuchs · Stuttgart, DE
Andreas Dutt · Stuttgart, DE

Key dates

Filing date	Feb 13, 2003
Grant date	Apr 18, 2006
Priority date	—
Expiry date	Feb 13, 2023

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T137/7927
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A pump unit for the metered delivery of fuel to internal combustion engines. The pump unit comprises a housing which comprises a longitudinal bore. Located in the longitudinal bore is an overflow valve, via which fuel flows back through a channel into a fuel tank. The passage can be opened or closed by a spring-loaded closing element. Fastened to the valve shaft of the overflow valve is a ring fitting. In the longitudinal bore of the housing there is an additional thread section, via which air flows out through vent gaps into a cavity of the ring fitting.

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