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:
Jun. 06, 1989
Filed:
Dec. 24, 1987
Applicant:
Inventors:
Donald E Knoop, Longview, TX (US);
John K Paustian, Benton Township, Berrien County, MI (US);
Assignee:
Whirlpool Corporation, Benton Harbor, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
D06F / ; D06F / ;
U.S. Cl.
CPC ...
68 1 / ; 68207 ;
Abstract
An automatic water level control is provided which utilizes a single pneumatic pressure sensor for detecting minimum water level, maximum water level and tub motion during agitation. Relative tub movement change during agitation and filling is used to determine an optimum water level for washing. A horizontal portion of the sensor fills with water during the tub filling process and provides the arrangement for detecting tub motion. A microprocessor stores and compares successive peak pressure signals to determine relative changes in tub motion amplitude.