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:
Feb. 09, 1988
Filed:
Jul. 08, 1987
Applicant:
Inventors:
Andrew J Hart, Downsview, CA;
Michael T Nailor, Toronto, CA;
Assignee:
Nailor-Hart Industries Inc., Toronto, CA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E05F / ;
U.S. Cl.
CPC ...
981212 ; 49-1 ; 98-1 ; 25112911 ; 251279 ;
Abstract
An air control damper is provided with an actuator coupled to a shaft for operating the blades of the damper. The actuator includes an electric drive motor that turns the shaft by way of a lever that is coupled to the shaft. The lever has a pulley at an outer end and a cable extends from the drive motor around the pulley and back to a fixed point adjacent the motor. When the motor is operated, the cable is wound around the motor drive shaft, pulling the lever towards the motor and turning the shaft. The arrangement provides a mechanical advantage in transmitting the motor output force to the blade actuating shaft.