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:
Mar. 24, 1992
Filed:
Jun. 25, 1991
Norbert Ronzon, Balve, DE;
Knebel & Rottger GmbH, Iserlohn, DE;
Abstract
A valve has a housing having a nonrotatable polygonal-section stem centered on a valve axis and a spindle coaxial with the stem, projecting axially therefrom, and formed with at least one peripheral tooth. A valve actuator has an electric drive motor having a housing and a drive shaft projecting from the housing along the axis and a sleeve fixed to the drive-motor housing coaxially with the shafts and formed with a seat complementarily engageable with the polygonal-section stem. Thus the sleeve and drive-motor housing are rotationally locked to the stem. A coupling fixed on the drive shaft fits complementarily over the spindle at the tooth thereof to rotationally interconnect the spindle and drive shaft and a rotary potentiometer in the sleeve between the coupling and the drive motor has a rotary part fixed on the drive shaft and a nonrotating part fixed on the motor housing.