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. 27, 2012
Filed:
Mar. 23, 2010
Birk Cliff Sorensen, Whittier, CA (US);
Ping Hsien Tsai, Walnut, CA (US);
Wai Pang Wong, Orange, CT (US);
John Edward Walsh, Wallingford, CT (US);
Louis Romo Martinez, Montebello, CA (US);
Birk Cliff Sorensen, Whittier, CA (US);
Ping Hsien Tsai, Walnut, CA (US);
Wai Pang Wong, Orange, CT (US);
John Edward Walsh, Wallingford, CT (US);
Louis Romo Martinez, Montebello, CA (US);
Emtek Products, Inc., City of Industry, CA (US);
Abstract
A keypad lockset adapted for deadbolt as well as lever locks, and having as a first embodiment an exterior gear train, an interior gear train, and an electronically controlled clutch for coupling the gear trains when engaged and for uncoupling the gear trains when the clutch is disengaged, so that when the clutch is engaged rotation of an external thumb turn will permit the door latch to be withdrawn and thus to permit opening of the door, and a mechanical override mechanism that can be operated in case of electrical failure, and in which clutch mechanism and the override mechanism both operate through the single, standard 2 and ⅛ inch door preparation hole, or alternatively as a second embodiment, a keypad lockset in which two four-bar mechanical linkages are used in place of gears as means to actuate the clutch, and alternatively to provide for a pass-through override function.