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:
Feb. 25, 1997
Filed:
May. 24, 1995
Rudolph Bergsma, Ann Arbor, MI (US);
Lindsey E Waldorf, Whitmore Lake, MI (US);
Other;
Abstract
A fluid-responsive vent control valve for an automobile fuel tank in which a liquid level responsive float controls a flexible, ribbon type valve member to peel it on and off a valve seat to open and close the valve. In one embodiment the float and outlet structure are offset. In an alternate embodiment the float and vent outlet are coaxial, and the ribbon valve is attached between the float and the valve body with a vent closure portion aligned with the outlet and a hinge portion offset from the outlet and connected to the float to provide opening and closing force to the ribbon valve. The outlet is preferably circular, and further includes a roundoff notch which cannot be closed by the pressure differential across the ribbon valve, but requires a final closing movement by the float and closure assist structure to fully close the valve.