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:
Jan. 05, 1982
Filed:
Mar. 20, 1979
Tsuneyuki Chiyoda, Matsuyama, JP;
Diesel Kiki Co., Ltd., Tokyo, JP;
Abstract
A device for detecting the quantity of a refrigerant circulating in an air conditioner for vehicles, provided with a sensing means which comprises a body having a hollow portion of a construction open to the outside thereof, projecting into the interior of the refrigerant receiver of the air conditioner. The sensing means also includes a floating element disposed within the hollow portion so as to float on the surface of the refrigerant therein. Thus, the sensing means has excellent resistance to shocks and vibrations, and can also be mounted in the refrigerant receiver even after the latter has been assembled. Also provided is an alarm means electrically connected with the sensing means to be actuated in response to the motions of the floating element, which may comprise a comparator means coupled to a time constant circuit, thus providing a stable alarm operation.