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:
Jan. 03, 1995
Filed:
Jan. 21, 1993
Applicant:
Inventors:
Douglas E Boyd, Dublin, OH (US);
Charles A Burton, Columbus, OH (US);
Assignee:
American Metal Door Company, Inc., Richmond, IN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E05F / ;
U.S. Cl.
CPC ...
49360 ; 49-4 ; 49139 ; 49141 ; 49362 ;
Abstract
A door positioning mechanism with a moveable carriage driven by a motor through a lead screw, wherein the moveable carriage is connected to open and close the door by movement of the door rectilinearly along a track through the expedient of a drive train utilizing a multiple sheave and cable connection between the door and the moveable carriage. A hand disconnect is provided to disable the positioning mechanism and allow manual movement of the door. A thermal (fire switch) dead weight control is also provided to over-ride the positioning mechanism and automatically shut the door.