Fluid handling – Control by change of position or inertia of system – Vent opening or closing on tipping container
Patent
1978-04-03
1980-04-01
Cohan, Alan
Fluid handling
Control by change of position or inertia of system
Vent opening or closing on tipping container
137453, 137205, B67D 300
Patent
active
041956524
ABSTRACT:
A liquid level control for a transmission sump wherein excess fluid is stored in an external reservoir. The external reservoir is connected to a vacuum source, such as the engine manifold, above the liquid level in the external reservoir. The external reservoir is connected through a passage to the transmission sump. The passage is connected to the external reservoir at a position above the liquid level, such that the vacuum in the external reservoir can be imposed upon the passage and terminates in the transmission sump at the desired level. The vacuum is thus transmitted to the transmission sump to withdraw liquid when the level therein is above the desired level whereby the sump liquid level is determined at a substantially constant level dependent upon the position of the passage in the transmission sump. If the sump level is below the passage terminus, fluid enters the sump, from the external reservoir, through a fill passage connected at the bottom of the external reservoir.
REFERENCES:
patent: 1909836 (1933-05-01), Kline
patent: 1972962 (1934-09-01), Weber
patent: 2207527 (1940-07-01), Weber
patent: 3703716 (1972-11-01), Moore
Cohan Alan
General Motors Corporation
Scherer Donald F.
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