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:
Feb. 10, 1976
Filed:
Aug. 28, 1974
Darwin R Grahl, Newark, NY (US);
Gary L Garcia, Newark, NY (US);
Parker-Hannifin Corporation, Cleveland, OH (US);
Abstract
A refrigerant fluid charging device that comprises an expansion valve, a charging tube for connecting the outlet of the expansion valve to the system to be charged, a thermally conductive tube enveloping the charging tube, and a thermal sensing tube connected to the expansion valve, the sensing tube being in temperature sensing contact with the conductive tube at spaced locations and at one of such locations being adapted to be brought into temperature sensing contact with the suction line of the system to be charged. The method includes the steps of providing a charging device in accordance with the foregoing, connecting the inlet of the expansion valve with a source of refrigerant fluid, connecting the charging tube to the suction line of the system to be charged, bringing the thermal sensing tube at one location thereof into temperature sensing contact with the system suction line, and initiating flow of refrigerant fluid from the source of supply through the expansion valve and charging line to the system suction line, and permitting flow of fluid into the system until the expansion valve is automatically closed under the influence of the sensing tube.