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:
May. 09, 2000
Filed:
Oct. 01, 1998
Eric J Giasson, Somerset, MA (US);
George Verras, Mansfield, MA (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
A flow regulating valve (100) for an air conditioning system is shown in which a body member (104) is provided with a fixed passageway (104a) and a variable passageway (104b) which results in regulating flow of refrigerant into the evaporator of the air conditioning system. Under high ambient and low or idle speeds, the system refrigerant pressure rises. This increases pressure in the evaporator and an increase in the saturation temperature of refrigerant in the evaporator. This increase in temperature is sensed by a helical thermostatic metal element (110) which moves to rotate an inlet sleeve (112) having a web (104c) formed between first and second windows (112a, 112b) to move into alignment with the inlet port (104c) of passageway (104b) to increase restriction to the flow of the refrigerant fluid through the valve thereby decreasing pressure of the refrigerant entering the evaporator. Upon continued increase in ambient temperature, the web continues to rotate bringing window (112b) into alignment with the inlet (104c) to increase refrigerant flow to prevent excessive pressure build-up in the compressor with resulting compressor cycling.