B - Operations – Transporting – 65 – D
Patent
B - Operations, Transporting
65
D
206/11
B65D 51/16 (2006.01)
Patent
CA 1120006
PATENT APPLICATION of BILLY G. CRUTE for PRESSURE-VACUUM RELIEF FUEL TANK CAP WITH ROLL-OVER SAFETY VALVE FEATURE (Case 19533.1) ABSTRACT OF THE DISCLOSURE A pressure-vacuum cap for a chamber such as an auto- mobile gas tank having a normally upwardly extending filler neck formed with a peripherally and radially extending, upwardly facing sealing surface concentric with the longitudinal axis of the neck, the cap comprising a cover, a concentric housing extending downwardly from the cover into the filler neck and a gasket or gaskets providing a seal between the housing and the sealing surface, the housing providing a valve body having a centrally disposed, concentric passageway extending axially therethrough and in communication with the chamber. A pressure- vacuum valve assembly is disposed in that passageway for norma- lizing the pressure in the chamber, venting the chamber to atmosphere when the pressure in the chamber exceeds a predetermined superatmospheric level and when the pressure in the chamber drops below a predetermined subatmospheric level. The cap also pro- vides, in addition to the pressure vacuum valve assembly, a roll-over valve assembly. Particularly, a rubber-like insert is disposed in the passageway to provide a downwardly facing, generally conical valve seat, and a ball is disposed in the passageway to move against the valve seat to close the passage- way against movement of fluid from the chamber when the filler neck is tilted downwardly to a predetermined angle relative to a horizontal plane. The rubber-like insert also provides a seal against the pressure-vacuum valve assembly.
325436
Ridout & Maybee Llp
Stant Manufacturing Company Inc.
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