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. 17, 2007
Filed:
Sep. 08, 2004
Albert S. Thanhauser, Stamford, CT (US);
Russell W. Sherwood, Olathe, KS (US);
Albert S. Thanhauser, Stamford, CT (US);
Russell W. Sherwood, Olathe, KS (US);
Longwood Corporation, Riverdale, NY (US);
Abstract
Alarms are often required on various vehicles and equipment such as fork lifts, dump trucks, bulldozers, etc. An alarm is disclosed controlled by a microprocessor, which is an integral part of the basic circuit. The alarm has a flat diaphragm, and a novel acoustic lens. The acoustic lens is constructed such that sound emanating from the center of the diaphragm has a direct path to the outside of the alarm. Sound produced around the periphery of the diaphragm must pass through a path containing switchbacks, that serve as an acoustic delay line, so this sound is delayed in exiting the alarm. The result is an alarm that with full sound in the important regions such as behind and to the side rear of the vehicle, but is very quiet for the operator or driver of the vehicle. The microprocessor is relied upon for adjusting alarm output based on source voltage and varying the signal based on ambient noise, as well as specific signals for particular applications.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile