US 6,123,175 AGranted

Interconnected vents for motor vehicle axle assembly

AssigneeDana Corporation

InventorGregory A. Fett

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Abstract

Interconnected vents for a motor vehicle axle assembly, transmission or transfer case which interconnects multiple vents at different locations together with another vent positioned at the highest point the lubricant travels. This allows the lubricant to flow out of one vent and return to the other vent without leaking onto the ground. Such an interconnected vent arrangement will minimize the extent of external lubricant leakage due to such factors as foaming of the lubricant, air entrapment in the lubricant, volumetric expansion of the lubricant due to elevated operating temperatures, pumping or splashing of the lubricant by internal rotating or moving parts, flow of the lubricant due to tilting of the motor vehicle, and thus the motor vehicle axle assembly, transmission and transfer case, and/or acceleration or deceleration of the motor vehicle.

Claims7

Dependent claims

An interconnecting vent for a motor vehicle axle assembly, the motor vehicle axle assembly including a first side axle having a cavity with lubricant therein and a first vent in an upper portion thereof and a second side axle having a cavity with lubricant therein and a second vent in an upper portion thereof, said interconnecting vent comprising:

an interconnecting tube having a first end and a second end, said first end of said interconnecting tube is adapted for attachment to the first vent in the cavity of the first side axle of the motor vehicle axle assembly and said second end of said interconnecting tube is adapted for attachment to the second vent in the cavity of the second side axle of the motor vehicle axle assembly, said interconnecting tube is adapted to be in communication with and capture and retain lubricant flowing from one or more of the first vent and the second vent;
and
a vent positioned in an upper portion of said interconnecting tube which is in communication with the outside environment and which is adapted to act to equalize the pressure in the cavity of the first side axle of the motor vehicle axle assembly and the pressure in the cavity of the second side axle of the motor vehicle axle assembly with the outside environment.

Dependencies are inferred from the claim text.