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. 05, 1991
Filed:
Aug. 30, 1989
Applicant:
Inventor:
Wilhelm Strache, Bremen, DE;
Assignee:
GESTRA Aktiengesellschaft, Bremen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16K / ; F16H / ;
U.S. Cl.
CPC ...
192 / ; 74 8915 ; 7442 / ; 251 69 ; 251 71 ;
Abstract
There is provided an electromotive drive for a control element, the overall drive is without self-inhibition, for which purpose its screw transmission has rolling elements in the thread, and the drive motor is a rotating field magnet. Provision is made for a freewheel clutch disposed between the drive motor and the screw transmission. A non-inhibiting reduction gear may be arranged between the freewheel clutch and the drive motor.