Patent · US Expired

Vacuum generator with power failure operation mode

US6719536B2 · kind B2 · utility

8Cited by

4References

11Claims

0Family size

Assignee

J.SCHMALZ GMBH · DE

Inventors

Kurt Schmalz · Dornstetten, DE
Thomas Eisele · Fluorn-Winzeln, DE

Key dates

Filing date	Apr 17, 2002
Grant date	Apr 13, 2004
Priority date	—
Expiry date	Apr 17, 2022

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF04F5/52
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

Vacuum generator comprising an ejector nozzle which is connected to a compressed-air supply via a compressed-air line, and with a first valve for opening and closing the compressed-air line, wherein a second electrical valve is connected to the suction line of the ejector which is open in the currentless state to connect a pneumatic vacuum switch, circuited in parallel with the first valve, to the suction line.

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