Ancillary oil pumping for gear box assembly

Details Ancillary oil pumping for gear box assembly Ancillary oil pumping for gear box assembly

2011-06-21

2011-06-21

Hannon, Thomas R (Department: 3656)

Machine element or mechanism

Gearing

Lubrication

C074S60600R, C184S006120, C418S015000, C418S206400

Reexamination Certificate

active

07963186

ABSTRACT:
A gear box assembly as used in an inverted portal axle or transfer case includes a drive gear and at least one driven gear in meshing engagement with the drive gear at a contact point. A gear housing closely surrounds portions of an outer circumference of the drive and driven gears to form a baffle area. The gear housing includes an discharge orifice that is located near the contact point and a fluid gallery that extends from the discharge orifice to other locations within the gear housing. As the drive gear drives the driven gear, fluid is pumped into the discharge orifice and through the fluid gallery to fluid outlets positioned at desired locations to lubricate other gear box components. Radial inlets with elongated chamfers and stator vanes can be formed within the gear housing to draw air ingested during pumping away from the discharge orifice. Additionally, a bypass loop can be used to scavenge unwanted air ingested into meshing gear teeth.

REFERENCES:
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patent: 2996999 (1961-08-01), Trautman
patent: 3529698 (1970-09-01), Nelson
patent: 3601515 (1971-08-01), Pelizzoni
patent: 4266915 (1981-05-01), McBurnett et al.
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patent: 6616432 (2003-09-01), Szczepanski et al.
patent: 2004/0000445 (2004-01-01), Smith et al.
patent: 2005/0271538 (2005-12-01), Knighton et al.
patent: 2006/0035741 (2006-02-01), Mierisch et al.

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