Patent · US Expired

Positive displacement rotary gas compressor pump

US4531899A · kind A · utility

8Cited by

9References

2Claims

0Family size

Assignee

Pierburg GmbH & Co. KG · DE

Inventors

Rainer Sudbeck · Duisburg, DE
Hans Baumgartner · Viersen, DE
Manfred Brandstadter · Düsseldorf, DE

Key dates

Filing date	Aug 24, 1983
Grant date	Jul 30, 1985
Priority date	—
Expiry date	Aug 24, 2003

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF01C17/06
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A positive displacement rotary gas compressor pump comprising a ring piston having an annular wall with a gap forming confronting inlet and outlet ends, the outlet end, during the compression of the gas in the inner and/or outer pumping chambers, cooperating with a bridging wall portion joining two concentric cylinder walls, or with the end of the inner cylinder wall near its transfer port, so that the gas is compressed before being discharged from the pump.

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