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. 15, 2002
Filed:
Aug. 28, 2000
John F. McGaffey, Murrieta, CA (US);
Wayne L. Russell, Ontario, CA;
Randy Van Cruz, La Habra, CA (US);
Polara Engineering, Inc., Fullerton, CA (US);
Abstract
A pedestrian push button assembly for activating a signal generator to generate a signal at a street crosswalk. The pedestrian push button assembly has a rigid frame having a piezoelectric material of a solid state switch positioned across a central aperture, and an elastic sealing ring positioned in a groove surrounding the piezoelectric material. A button is secured to the rigid frame such that (1) a seal contact portion of the button sealably rests against the elastic sealing ring, (2) a very small space separates an abutment surface of the button and a stopper surface of the rigid frame, and (3) an elastic pressure portion of the button contacts the piezoelectric material. When operated, the elastic sealing ring is sufficiently biased to urge the elastic pressure portion against the piezoelectric material to generate a signal pulse.