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. 19, 2005
Filed:
May. 14, 2003
Applicant:
Hideki Nakano, Sakura, JP;
Inventor:
Hideki Nakano, Sakura, JP;
Assignee:
Otis Elevator Company, Farmington, CT (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E05F011/00 ; E05F017/00 ; E05C007/06 ;
U.S. Cl.
CPC ...
Abstract
A device for urging a door into a first position includes a spring apparatus () including a winding drum () having a conical outer peripheral surface () and a torsional spring () for imparting a relatively constant urging force to a cablesecured to the door in the direction of the first position.