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. 26, 1988
Filed:
Aug. 29, 1986
Applicant:
Inventor:
John V Ballun, Plainfield, IL (US);
Assignee:
AMSTED Industries Incorporated, Chicago, IL (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F17D / ;
U.S. Cl.
CPC ...
137599 ;
Abstract
An anti-cavitation arrangement for a rotary valve including a conduit by-passing the valve passage and connecting the upstream end to the downstream end of the valve passage. A normally closed pressure controlled or manual valve is disposed in the conduit and is open upon sensing a vacuum on the downstream end of the valve or by manual means so that process fluid is free to flow into the vacuum and thereby prevent cavitation.