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:
Dec. 28, 1976
Filed:
Oct. 28, 1975
Applicant:
Inventor:
James A Bernard, Dayton, OH (US);
Assignee:
General Motors Corporation, Detroit, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16K / ; F16K / ;
U.S. Cl.
CPC ...
137807 ; 137 13 ; 137251 ;
Abstract
A refrigerant control valve for an air conditioning system in which a flow passage is formed between closely spaced poles of an electro-magnet which may be selectively magnetized by energizing a coil to produce a magnetic field through the pole members and across the flow passage. This attracts a quantity of small iron particles which are mixed with and circulate with the refrigerant and lubricating oil. The accumulation of iron particles on the surfaces of the pole members decreases the flow area between the poles and controls refrigerant flow.