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:
Jun. 20, 1995
Filed:
May. 20, 1994
Applicant:
Inventor:
Tommy L Lyman, Piqua, OH (US);
Assignee:
General Motors Corporation, Detroit, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F25B / ;
U.S. Cl.
CPC ...
62471 ; 62503 ;
Abstract
A bottom feed accumulator canister for an automotive air conditioning system includes a novel means to prevent drain down when the system compressor is off. A valve chamber located at the bottom of, and to one side of, the accumulator return tube surrounds a small bleed orifice through the tube. A valve seat in the valve chamber holds a weight that is sufficiently massive to block the valve seat against liquid ingress when the compressor is off. When the compressor is on, the suction at the bottom of the return tube is also seen in the valve chamber, lifting the weight so that liquid can be drawn into the tube through the small orifice.