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. 09, 2010
Filed:
Oct. 16, 2002
Douglas R. Domel, Santa Clarita, CA (US);
Winston G. Walker, Littleton, CO (US);
Douglas R. Domel, Santa Clarita, CA (US);
Winston G. Walker, Littleton, CO (US);
Harmonic Design, Inc., Poway, CA (US);
Abstract
A motorized window covering has a motor and a housing that holds the motor and a dc battery. When the motor is energized to move a window covering, a pulse detector counts the motor current pulses to determine the position of the window covering. A user can save a motor current pulse count corresponding to a desired position and then return the desired position from a different position by simply pressing a button on a remote control unit. Further, inaccuracies caused by motor current pulses that were not counted by the pulse detector, e.g., at start up, at shut down, or during coast down, are minimized by error correction logic.