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US 6,206,140 B1Granted
Pressure lubrication system for countershaft transmission
AssigneeEaton Corporation
InventorsRobert B. Craft, Daniel A. Monette
Life of this patent
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AssigneeEaton Corporation
InventorsRobert B. Craft, Daniel A. Monette
Estimating the term…
A lubrication system for transmissions is provided wherein a lubrication flow path is provided from an oil pump located within a transmission casing to front countershaft bearings. A second flow path provides oil directly to a predetermined number of gear sets located along a main shaft. In one embodiment, oil flows through a first tube from the oil pump to an annular ring located in a groove between a front wall of the transmission main case and a rear face of a clutch housing. The ring is provided with a plurality of apertures along its outer circumference spaced to allow oil to flow directly to front bearings of any counter shaft placed adjacent the main shaft. A closed ended tube connects to the annular ring and extends perpendicularly from the annular ring through the front wall of the transmission main case. The closed ended tube extends substantially parallel to the driven main shaft, and includes spaced apertures that deliver oil directly to a predetermined number of gear sets located axially along the main shaft.
In a transmission having at least one main shaft and at least one countershaft enclosed by a transmission housing, wherein the at least one countershaft is supported on a first end by a countershaft bearing, and wherein the transmission housing further encloses an oil sump, a transmission lubrication system, comprising:
A lubrication system for a transmission, comprising:
A lubrication system for a transmission, comprising:
Dependencies are inferred from the claim text.