Lubrication – Systems – With safety or indicating means
Patent
1991-04-22
1992-05-26
Lazarus, Ira S.
Lubrication
Systems
With safety or indicating means
184 612, 184 613, 417 2, F01M 118
Patent
active
051158876
ABSTRACT:
A transmission transfer case has a sump or reservoir that is lower than the main transmission sump or reservoir. A scavenge pump is provided to prevent excess fluid storage in the transfer case during normal vehicle operation by transferring the fluid stored therein to the main transmission sump. During normal operation and vehicle towing, an output driven pump is provided to supply lubricating fluid to the transfer case components. A control valve, actuated by a signal from the main transmission control, directs fluid to the output driven pump from the main transmission sump during normal operation and from the transfer case sump during towing operation. The control valve also connects the scavenge pump with the transfer case during normal operation. A single supply passage is connected between the transfer case sump and the control valve.
REFERENCES:
patent: 1997700 (1935-04-01), Short
patent: 2440371 (1948-04-01), Holley, Jr.
patent: 2550967 (1951-05-01), Burks et al.
patent: 2642155 (1953-06-01), Wilhelm, Jr. et al.
patent: 2871981 (1959-02-01), Baits
patent: 4891934 (1990-01-01), Huelster
patent: 4976335 (1990-12-01), Cappellato
Cariaso Alan B.
General Motors Corporation
Lazarus Ira S.
Scherer Donald F.
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