Receptacles – Container attachment or adjunct – Filling member
Patent
1986-04-28
1987-09-01
Lowrance, George E.
Receptacles
Container attachment or adjunct
Filling member
220288, 220304, 220DIG33, B65B 3100, B65D 4104
Patent
active
046902937
ABSTRACT:
A filler cap structure for a vehicular fuel tank particularly designed to prevent the discharge of fuel vapor to the ambient atmosphere and hence possible air pollution resulting therefrom upon filling of the fuel tank. The fuel tank has a filler tube closed by a filler cap. The filler tube is provided on its inner peripheral surface at a location inward of the bottom end of the filler cap with an annular seal seat. Defined by the annular seal seat, the inner peripheral surface of the fillter tube, and the bottom portion of the filler cap is an annular space which is connected through a communication tube with a canister. The annular space is sealed from the atmosphere by a first seal member disposed between the inner peripheral surface of the filler tube and the filler cap at a location outward of the annular space. The filler cap is provided on its bottom end with a second seal member which is adapted to be placed, upon complete closure of the filler cap against the filler tube, in sealing engagement with the annular seal seat on the inner peripheral surface of the filler tube for sealing of the fuel vapor in the fuel tank, the second seal member being moved away from the annular seal seat so as to place the fuel tank in communication with the canister when the filler cap is partially loosened.
REFERENCES:
patent: 3477611 (1969-11-01), Niles
patent: 3907153 (1975-09-01), Matty
patent: 4142756 (1979-03-01), Henning
patent: 4228915 (1980-10-01), Hooper
patent: 4337873 (1982-07-01), Johnson
patent: 4494673 (1985-01-01), Hiraishi
Itoh Takaaki
Uranishi Kouji
Lowrance George E.
Toyota Jidosha & Kabushiki Kaisha
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