The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 05, 1996
Filed:
Jul. 03, 1995
Hubert Richardson, Jr, Brooklyn, MI (US);
Todd W Herrick, Tecumseh, MI (US);
Tecumseh Products Company, Tecumseh, MI (US);
Abstract
A compressor is provided with a check valve which is disposed in a suction chamber adjacent a suction port opening. The check valve provides fast response and enhanced operating characteristics for preventing reverse refrigerant flow and reverse scroll operation during compressor shutdown. During normal compressor operation the check valve is open to allow communication of refrigerant into the suction chamber where the refrigerant is acted upon by the scroll mechanism and discharged through a discharge port. A positive pressure differential exists between the discharge port and the suction port which unimpeded causes reverse scroll operation upon compressor shutdown. The positive pressure condition in the suction chamber forces the check valve to pivot to a closed position whereby it covers and substantially seals the suction port. By preventing reverse refrigerant flow through the suction port the check valve effectively eliminates the pressure differential and thereby prevents reverse scroll operation.