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:
Jul. 17, 1990
Filed:
Jun. 17, 1988
Applicant:
Inventors:
Otto E Kersten, Milwaukee, WI (US);
Jack E Moll, New Berlin, WI (US);
George C Balbach, Lake Forest, IL (US);
Assignee:
ASI Technologies, Inc., Milwaukee, WI (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E06B / ; E06B / ; F16D / ;
U.S. Cl.
CPC ...
60437 ; 60436 ; 60441 ; 60442 ; 60464 ; 74625 ; 7466 / ; 160310 ; 160311 ; 160312 ; 49 27 ; 49360 ; 417442 ;
Abstract
A door operator having a fluid drive motor and a manual override. The bidirectional hydraulic motor connects to a drive shaft through a power train including a shiftable --quill--type manual clutch mechanism which allows an alternate connection of the drive shaft to a manually-operated wheel. When the cable which shifts the clutch for manual drive is pulled, a switch disables the control for the hydraulic motor. When the motor is not provided with pressured fluid from the pump a hydraulic brake engages the motor.