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:
May. 18, 1999
Filed:
May. 29, 1997
Applicant:
Inventors:
Manfred Stahle, Sandton, ZA;
Dieter H Kallenbach, Sandton, ZA;
Assignee:
Corrupipe CC, , ZA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G05D / ;
U.S. Cl.
CPC ...
137114 ; 137907 ;
Abstract
A relief valve for use with automatic suction operated swimming pool cleaners which has a tubular body and a bypass passage into the body inclined at an acute angle to the inlet and controlled by a closure pivotally supported about an end upstream of the normal flow direction through the valve and with the closure biased, preferably by at least one tension spring, to the closed position.