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:
Jan. 12, 1988
Filed:
Feb. 06, 1987
Applicant:
Inventor:
Robert H Ahrens, deceased, late of Janesville, WI (US);
Assignee:
Bergstrom Manufacturing Co., Rockford, IL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16K / ;
U.S. Cl.
CPC ...
13761411 ; 13761421 ; 251901 ;
Abstract
A valve in which a rotary valve member includes rollers which support two endless belts to roll along the cylindrical wall of a valve housing as the valve member is opened and closed. The belts seal tightly against the wall and close off inlet and outlet ports when the valve member is in its closed position.