Sealed, non-permeable fuel tank for spark-ignition motors
First Claim
1. A fuel tank for a spark-ignition motor having a vapor intake port, the fuel tank comprising:
- a tank body having a tank wall enclosing a tank volume;
a filler port at a filler-port location in a first upper portion of the tank wall, the filler-port location spaced radially from a vertical axis passing through a geometric center of the tank when the tank is in a horizontal position, the filler port establishing a liquid fill-level limit for the tank volume;
a vapor dome formed by a second upper portion of the tank wall, the vapor dome subtending a vapor space above the liquid fill-level limit; and
a vapor vent valve mounted in the vapor dome, the vapor vent valve connectable to the vapor intake port,the vapor dome having a shape and size allowing the tank body to tilt from about the horizontal position to about thirty degrees from the horizontal position in at least two orthogonal directions before a liquid filling the tank volume to the liquid fill-level limit contacts the vapor vent valve.
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Accused Products
Abstract
A fuel tank for a spark-ignition motor with a vapor intake port has a tank body having a tank wall enclosing a tank volume. A filler port in a first upper portion of the tank wall establishes a liquid fill-level limit for the tank volume. A vapor dome formed by a second upper portion of the tank wall subtends a vapor space above the liquid fill-level limit. A vapor vent valve is mounted in the vapor dome and is connectable to the vapor intake port. The vapor dome has a shape and size allowing the tank body to tilt from about a horizontal position to about thirty degrees in any direction from the horizontal position before a liquid filling the tank volume to the liquid fill-level limit contacts the vapor vent valve.
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Citations
13 Claims
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1. A fuel tank for a spark-ignition motor having a vapor intake port, the fuel tank comprising:
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a tank body having a tank wall enclosing a tank volume; a filler port at a filler-port location in a first upper portion of the tank wall, the filler-port location spaced radially from a vertical axis passing through a geometric center of the tank when the tank is in a horizontal position, the filler port establishing a liquid fill-level limit for the tank volume; a vapor dome formed by a second upper portion of the tank wall, the vapor dome subtending a vapor space above the liquid fill-level limit; and a vapor vent valve mounted in the vapor dome, the vapor vent valve connectable to the vapor intake port, the vapor dome having a shape and size allowing the tank body to tilt from about the horizontal position to about thirty degrees from the horizontal position in at least two orthogonal directions before a liquid filling the tank volume to the liquid fill-level limit contacts the vapor vent valve. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification