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. 19, 2007
Filed:
May. 27, 2004
Applicants:
Ralph G. Greene, Soddy Daisy, TN (US);
Nelson Edwards, Chattanooga, TN (US);
Inventors:
Ralph G. Greene, Soddy Daisy, TN (US);
Nelson Edwards, Chattanooga, TN (US);
Assignee:
Other;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
F16K 17/32 (2006.01);
U.S. Cl.
CPC ...
Abstract
An automatic shutoff valve is provided. The valve is preferably constructed of a check valve (which is normally shut) and a shutoff valve which is open during static, no-flow, operation. Upon initiation of flow, even a drip flow, the check valve opens, and the pressure differential from the inlet to the outlet causes a piston in the shutoff valve to move toward a shut position. As long as the pressure differential stops before the piston closes, the shutoff valve resets to the fully open position. However, if the shutoff valve shuts, it preferably must be manually reset.