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:
Jul. 18, 1995
Filed:
Aug. 05, 1994
Robert W Guertin, Troy, OH (US);
Catlow, Inc., Tipp City, OH (US);
Abstract
A coaxial breakaway coupling and a coaxial hose connect a fuel dispensing pump to a coaxial fuel dispensing nozzle, and the coupling includes first and second tubular valve bodies releasably coupled together by an annular canted coil spring. Each valve body supports therein an axially movable tubular valve member for defining an inner vapor return passage and an outer fuel supply passage, and a vapor return check valve member is supported for axial movement within the vapor return passage upstream of an annular valve seat. All of the valve members are spring biased towards closed positions and move to open positions when the valve bodies are coupled together. When the valve bodies are uncoupled or separate in response to an axial breakaway force, the valve members close, and suction from a vacuum pump connected to the vapor return passage pulls the check valve member towards it closed position against the valve seat. In a modification, the breakaway coupling is integrated with a 45.degree. coaxial swivel coupling connected to a coaxial fuel dispensing nozzle.