Capillary valve for hydraulic systems

Details Capillary valve for hydraulic systems Capillary valve for hydraulic systems

1987-08-10

1988-11-08

Cohan, Alan

Fluid handling

Diverse fluid containing pressure systems

Fluid separating traps or vents

137590, 137565, F16N 714

Patent

active

047828510

ABSTRACT:
A scavenger system (10) for a hydraulic recirculating installation, such as may be employed with a vehicular transmission (11), which employs a sump (18) to collect the recirculating hydraulic fluid (19). The sump (18) is to be maintained essentially dry, and as a result the requisite volume of hydraulic fluid (19) for the recirculating installation is stored within an independent reservoir (28). The sump (18) is provided with one or more collecitng wells (21), and a unique pickup head assembly (22) is received within each well (21). The pickup head assembly incorporates capillary ducts (46) which control communication between the well (21) and the conduit means (29) in response to the hydraulic fluid (19) within the well. The capillary filter serves to admit the flow of hydraulic fluid freely therethrough but precludes the passage of air therethrough. A circulating pump (25) has an inlet port (30) which communicates with the reservoir (28) by virtue of a conduit means (29). The conduit means (29) also effects communication between the inlet port (30) of the pump (25) and each pickup head assembly (22).

REFERENCES:
patent: 2436147 (1948-02-01), Le Clair
patent: 4489745 (1984-12-01), Netter
patent: 4666594 (1987-05-01), Schneider
Ward's Engine Update, 12/1/86; p. 3, "Walbro's Fuel Pump".

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