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:
Oct. 23, 2001
Filed:
Apr. 13, 2000
Rudy Yorio, Pompano Beach, FL (US);
Andrzej T. Guzik, Pompano Beach, FL (US);
William Boone Mullen, III, Coral Springs, FL (US);
Danny E. Ross, Plantation, FL (US);
Raymond C. Vivian, Jr., Clearwater, FL (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
A piezoelectric active-mode incrementor switch system (,) includes two ratchet wheels (,) that are rotationally mounted on a drive shaft (,) having a knob (,). The ratchet wheels (,) form a slipping clutch with their respective drive wheels (,) which are rigidly mounted to the drive shaft and mechanically loaded with spring (,). The ratchet wheels (,) are mounted inversely to each other on the drive shaft (,) and make contact with their respective cantilever beams (,) which each have a piezoelectric film. In operation, the switch (,) functions by mechanically stimulating the piezoelectric beams. When the knob (,) is rotated in one direction, only one of the beams (,) is displaced causing a generation of an electrical charge that acts as a signal. The other beam (,or,) is prevented from moving and therefore its beam does not produce a signal. When the knob (,) is rotated in the opposite direction, the other beam that was previously prevented from moving is displaced causing an electrical signal to be generated by the switch.