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:
Oct. 08, 2002
Filed:
Nov. 16, 2000
Immanuel Buschatz, Unterensingen, DE;
Behr Thermot-tronik GmbH & Co., Kornwestheim, DE;
Abstract
An actuator for a device such as a tappet of a valve. The actuator having a thermostatic operating element electrically heated by an electrical heating element, and including an operating piston. A proportional piston stroke regulator detects and controls the position of the operating piston. The proportional piston stroke regulator includes a piston travel detection device, that detects the actual position of the operating piston, connected to a conventional closed-loop controller which compares the measured piston position to a predetermined piston control position entered into the closed-loop controller. Based on the comparison, the closed-loop controller regulates the electrical supply to the electrical heating element.