Scroll compressor with bypass release passage in stationary scroll member

Patent 5055012 Issued on October 8, 1991. Estimated Expiration Date:

August 15, 2009. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

Variable-capacity scroll-type compressor Patent #: 4846633
Issued on: 07/11/1989
Inventor: Suzuki , et al.

Inventors

Assignee

Kabushiki Kaisha Toshiba

Application

No. 394134 filed on 08/15/1989

US Classes:

417/440, Having separate noncyclic valve (e.g., bypass, etc.)418/55.1Helical working member, e.g., scroll

Examiners

Primary: Vrablik, John J.

Attorney, Agent or Firm

Shaw, Jr.; Philip M.

Foreign Patent References

54-81513 JP. 06/19/1979
57-16292 JP 01/19/1982
61-197783 JP 09/19/1986

International Classes

F04B 049/02
F04C 018/04
F04C 029/08

Foreign Application Priority Data

1988-08-31 JP

Abstract

A scroll compressor for use in compressing gases includes a stationary scroll member having a top surface, a movable scroll member orbiting about the stationary scroll member for compressing gases together with the stationary scroll member as it orbits about the stationary scroll member, a discharge port formed in the center of the stationary scroll member for discharging the compressed gases, a plurality of release ports which are offset different distances from the center of the stationary scroll member, a release cavity formed in the stationary scroll member and in communication with one of the plurality release ports, a release guide passage passing through the stationary scroll member in parallel with the top surface of the stationary scroll member in communication with the release cavity, a sealed case for housing the stationary scroll member and the movable scroll member and a release pipe connected to the release guide passage through the sealed case.