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:
Feb. 08, 2000
Filed:
Jul. 14, 1998
Applicant:
Inventor:
James M Walker, Fond du Lac, WI (US);
Assignee:
Alliance Laundry Systems LLC, Ripon, WI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
D06F / ; F17D / ;
U.S. Cl.
CPC ...
68207 ; 137554 ;
Abstract
A valve member position sensor for continuously monitoring the position of the valve member of a flow-control valve in a dry-cleaning apparatus using CO.sub.2 as the cleaning fluid. The valve member position sensor includes a potentiometer with its shaft connected to the drive shaft of the valve such the resistance of the potentiometer changes with the valve member position. The resistance value of the potentiometer is detected by passing a constant current through the potentiometer to produce a voltage drop across the potentiometer. The voltage drop is measured by a controller to determine the valve position.