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. 31, 2012
Filed:
May. 07, 2009
Applicant:
Mark P. Barrieau, Baldwinville, MA (US);
Inventor:
Mark P. Barrieau, Baldwinville, MA (US);
Assignee:
SimplexGrinnell LP, Westminster, MA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E05C 17/56 (2006.01); E05C 1/06 (2006.01); E05C 1/02 (2006.01); E05B 47/00 (2006.01); E05B 15/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A system for securing and releasing doors includes at least two electromagnetic latches and a controller. Each of the electromagnetic latches includes a coil configured to be energized by a power signal to create a magnetic field. The controller switches the power signal between the electromagnetic latches so that the power signal is supplied to the electromagnetic latches one at a time. The electromagnetic latches may be electromagnetic door holders, electromagnetic door locks, or any combination of the two.