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:
Aug. 17, 1982
Filed:
Mar. 28, 1980
Applicant:
Inventors:
Mitsuo Suzuki, Hitachi, JP;
Takeshi Tokunaga, Hitachi, JP;
Seiji Yonekura, Hitachi, JP;
Shigeru Matsuoka, Hitachi, JP;
Kenji Nakamura, Hitachi, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E05F / ;
U.S. Cl.
CPC ...
49199 ; 49 28 ; 318266 ;
Abstract
A garage door operation control apparatus comprises a disc rotatable in interlocked relation with a door driving system, which disc actuates an upper limit switch and a lower limit switch at the door upper and lower limit positions respectively. The interlocked relation of the driving system and the disc may be cancelled thereby to adjust the responsive position of the limit switches.