Dry sump scavenging system with independent head source

Details Dry sump scavenging system with independent head source Dry sump scavenging system with independent head source

1987-04-13

1988-08-09

Freeh, William L.

Lubrication

Systems

Dry sump

417 41, 417126, F01M 910, F01M 1104

Patent

active

047622016

ABSTRACT:
A scavenging system (10 or 110) for hydraulic circulation installations. A pump (25) delivers the hydraulic fluid (19) which is thereafter collected in a sump (18 or 18A) that is to be maintained essentially dry. A reservoir (28), independent of the sump (18 or 18A), is supplied for storing the requisite volume of hydraulic fluid (19) for the installation with which the scavenging system (10 or 110) is to be used, and a pump (25) supplies the fluid (19) from this reservoir (28). At least one pickup head assembly (22) is disposed within each sump (18 or 18A), and a float valve (45) is mounted within each pickup head assembly (22). The float valve (45) acts, in response to the level of the fluid (19) within the sump (18 or 18A), to open and close communication through a scavenging conduit system (38) that connects between the sump (18 or 18A) and the reservoir (28). Means (59 or 85) independent of the pump (25) provide a pressure differential between the reservoir (28) and each sump (18 or 18A) sufficient to lift the fluid (19) within the sump (18 or 18A), through the scavenging conduit system (38) and into the reservoir (28) without reducing the pressure within the reservoir (28) to a level that would interefere with the operation of the pump (25) in delivering the fluid (19) from the reservoir (28).

REFERENCES:
patent: 432849 (1890-07-01), Wright
patent: 1457286 (1923-05-01), Sparks
patent: 2177517 (1939-10-01), Cuthrell
patent: 2453217 (1948-11-01), Gregg et al.
patent: 2874804 (1959-02-01), Haas

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