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:
Apr. 13, 1993
Filed:
May. 03, 1991
Steven W Rogers, Conway, AR (US);
Hanford D Monroe, Conway, AR (US);
FMC Corporation, Chicago, IL (US);
Abstract
A force sensing apparatus and method in a vehicle wheel balancer is disclosed which in one embodiment includes use of a voltage controlled oscillator connected to drive a piezoelectric crystal at an oscillation frequency which is compared in phase to a frequency generated by the wheel balancer spin shaft encoder. When unbalance force imposed changes occur in the crystal oscillation frequency, an unbalance output is provided by the comparison which contains the unbalance force magnitude and angular orientation information. The unbalance output is processed to provide operator indications for facilitating application of counterweights to the vehicle wheel.