Fluid handling – Control by change of position or inertia of system – Vent opening or closing on tipping container
Patent
1980-01-03
1981-11-10
Nilson, Robert G.
Fluid handling
Control by change of position or inertia of system
Vent opening or closing on tipping container
F16K 1736
Patent
active
042992478
ABSTRACT:
A fuel tank vent apparatus includes an upper housing for enclosing a movable weight in the form of a metal ball. The lower part of the apparatus is provided with venting ports closable by a push rod operated piston, wherein such push rod is spring biased upwardly toward the aforementioned metal ball. For a normal, upright position of the apparatus, the ball is centered in its housing by a ramp and urges the push rod downwardly against spring bias whereby ports into the tank are open allowing venting. However, if the apparatus becomes inclined to a predetermined angle, the ball is supported to a greater extent by the ramp surrounding the push rod, allowing the biasing spring to urge the push rod upwardly for moving the piston and closing the vents. Thus, should a vehicle containing this vent apparatus overturn or otherwise be oriented at greater than a predetermined angle whereby fuel would be apt to escape, the vent will be closed in response to spring bias.
REFERENCES:
patent: 2869563 (1959-01-01), Schoengrun
patent: 3021856 (1962-02-01), Bend
patent: 3389715 (1968-06-01), Hebard
patent: 3994360 (1976-11-01), Leibold
patent: 4185651 (1980-01-01), Paulson
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