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:
Dec. 25, 2007
Filed:
Jun. 18, 2003
Nils D. Sellman, Simsbury, CT (US);
Nils D. Sellman, Simsbury, CT (US);
Power Access Corporation, New Hartford, CT (US);
Abstract
An automatic door opener () for opening or closing a door () includes a motor () driving a drive shaft () and an opener arm () connected to the door () and being responsive to rotation of the drive shaft () for moving the door () to an open or closed position. A clutch () operable to disengage the drive shaft () from the opener arm () is provided in the event of the door () engaging an obstacle, electric power being unavailable, or the door being fully open or fully closed. The door opener () may also include a brake () for selectively preventing movement of the door (). Various embodiments of the invention are provided, including an electromagnet () and an electromagnetic brake ().