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. 08, 2011
Filed:
Feb. 02, 2006
Todd C Zimmer, Meriden, CT (US);
Todd C Zimmer, Meriden, CT (US);
Sargent Manufacturing Company, New Haven, CT (US);
Abstract
A return spring assembly for returning a handle to the horizontal orientation includes a spring housing having an outer flange that contacts an outer surface of a door around the perimeter of a bored opening and an inner portion with a curved section that securely supports a latchbolt lock mechanism when an identical return spring assembly is installed on an opposite side of the door. A spring is driven by two spring drivers operating with a lost motion connection to the handle spindle to alternately compress the spring from opposite directions as the handle is rotated in opposite directions. The spring is positioned to not interfere with a linkage extending out from the latchbolt lock mechanism.