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. 14, 1995
Filed:
Feb. 01, 1994
Applicant:
Inventors:
Robert A Schueler, Oconomowoc, WI (US);
Stuart J Schueler, Middleton, WI (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01V / ;
U.S. Cl.
CPC ...
250221 ; 180272 ;
Abstract
A non-contact operator present engine cut-off switch includes an emitter for directing a radiated signal away from a control handle on power machinery and a detector positioned to receive the radiated, reflected signal from the hand of an operator in order to detect the operator presence in an operating zone to permit operation of the power machinery. The non-contact sensing circuitry may be hermetically sealed to protect the circuitry from adverse environmental conditions.