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:
Jul. 20, 1976
Filed:
Dec. 08, 1975
James A Bernard, Dayton, OH (US);
General Motors Corporation, Detroit, MI (US);
Abstract
A refrigerant control valve for an air conditioning system including a flow passage formed by a tubular member of non-magnetizable material encircled by an annularly shaped electromagnetic coil. The electromagnet is housed in a shell having an inner cylindrical wall located adjacent the tubular member and which extends from one end of the shell toward the second end and terminating therebetween to form an end surface. The second end of the housing shell has a threaded opening which encircles the tubular member and into which a calibration nut or member extends. The calibration member has an end surface which is spaced closely from the end surface of the cylindrical wall by rotation of the calibration member to produce a desired magnetic field therebetween when the electromagnetic coil is energized. The magnetic field across the end surfaces attracts an accumulation of small iron particles which are mixed with the refrigerant to the inner wall of the tubular member in a location near the spaced end surfaces and thereby restricts fluid flow through the tubular member.