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. 02, 2005
Filed:
Oct. 31, 2003
Applicants:
Pierre-emmanuel Cavarec, San Diego, CA (US);
Winston Glenn Walker, Littleton, CO (US);
Inventors:
Pierre-Emmanuel Cavarec, San Diego, CA (US);
Winston Glenn Walker, Littleton, CO (US);
Assignee:
Somfy SAS, Cluses, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02P003/00 ;
U.S. Cl.
CPC ...
Abstract
A motor for turning the rod of an object such as a window covering is attached to an elongated ferromagnetic bar. Magnets are closely spaced from the bar, and as the bar rotates to cut the magnetic field lines, pickup coils generate signals that can be used to determine the direction and speed of rotation and also the position of the motor (and, hence, the position of the object being moved). The magnets brake the motor from turning under the weight of the object when the motor is deenergized.