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. 26, 1988
Filed:
Jul. 08, 1986
Gunter Piesche, Ubstadt-Weiher, DE;
Ranco Incorporated, Dublin, OH (US);
Abstract
A temperature responsive switch includes a housing(1) which can be secured to the engine block of a motor vehicle and a temperature sensitive element (4) which is in contact with the cooling medium of the motor. In order to guarantee switching dependent on the temperature (T) and the pressure (P) of the cooling medium, in the housing (1) a hermetically sealed bellows-capillary-unit (4) is disposed which responds to temperature (T) and pressure (P) of the cooling medium and around which the cooling medium circulates, being sealed against the housing portion through which the cooling medium flows, a movable switching contact (6) mounted on the bellows-capillary-unit (4) is disposed in a room (7) open towards the atmosphere and covered by a cover (8) and a fixed switching contact is disposed in said cover (8), and the bellows-capillary-unit (4) is filled with a liquid having a vapor pressure curve of between about 1,2 bar at 96.degree. C. and 1,8 bar at 110.degree. C.