Method and apparatus for lubricating a differential gear...

Details Method and apparatus for lubricating a differential gear... Method and apparatus for lubricating a differential gear...

2007-01-09

2007-01-09

Estremsky, Sherry (Department: 3681)

Planetary gear transmission systems or components

With lubricaton

For differential planetary gearing

Reexamination Certificate

active

10859831

ABSTRACT:
An inter-axle differential gear assembly includes a first side gear driven by an input shaft, a plurality of inter-axle differential pinion gears in meshing engagement with the first side gear, and a second side gear in meshing engagement with the inter-axle differential pinion gears. The second side gear includes a gear body having a front face and a rear face positioned opposite of the front face. At least one channel, formed within the gear body, extends between the front and rear faces. Lubricating fluid is pumped through the channel to lubricate the inter-axle differential gear assembly. A tapered roller bearing is positioned adjacent the rear face of the second side gear. A seal, positioned between the tapered roller bearing and the rear face of the second side gear, forms a sealed fluid cavity. Rotation of the tapered roller bearing generates a pumping action that pumps the lubricating fluid through the tapered roller bearing, into the sealed fluid cavity, and into the channel.

REFERENCES:
patent: 1529804 (1925-03-01), Nogrady
patent: 3495298 (1970-02-01), Engle et al.
patent: 4031780 (1977-06-01), Dolan et al.
patent: 5302158 (1994-04-01), Kwasniewski
patent: 6413183 (2002-07-01), Ishikawa et al.

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