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. 16, 1990
Filed:
Mar. 24, 1989
Applicant:
Inventor:
Wolfgang Schmierer, Pforzheim, DE;
Assignee:
Dr. Ing. h.c.F. Prosche AG, Weissach, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B60C / ;
U.S. Cl.
CPC ...
340444 ; 340442 ; 200 6122 ; 200 / ; 200 / ; 200 / ; 116 / ; 731465 ;
Abstract
A pressure switch for monitoring a tire pressure of a motor vehicle tire is fastened to a wheel rim and is actuated by the inflating pressure in the tire. The pressure switch comprises a reference pressure chamber which is sealed off by an electrically conductive switching diaphragm in the direction of the tire, and carries a contact pin interacting with this diaphragm. The switching diaphragm has a mass which is controlled as a function of centrifugal force in response to tire rotation such that the switching point of the pressure switch can be changed automatically as a function of vehicle speed.