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:
Oct. 30, 1990
Filed:
Mar. 20, 1990
Penrod C Geisinger, Dewey, AZ (US);
Vaporless Manufacturing, Inc., Prescott Valley, AZ (US);
Abstract
A check valve for a leak detector used in conjuction with a gasoline dispenser maintains the delivery line under pressure to accelerate translation of the leak detector from the relaxed position through the leak position and to the non leak position unless there is a line leak resulting in flow above a predetermined flow rate. Upon cessation of fuel delivery at the outlet nozzle, the check valve isolates the leak detector from damage due to hydraulic hammer. In the event of leak in the delivery line, the bleed off of pressure locked in by the check valve will permit the leak detector to sense the low pressure when in the leak position and signal the station operator by restricting the flow rate.