Lubrication – Systems – Gearing
Reexamination Certificate
1999-06-24
2001-02-20
Bonck, Rodney H. (Department: 3681)
Lubrication
Systems
Gearing
C074S467000, C074S60600R, C192S219000
Reexamination Certificate
active
06189655
ABSTRACT:
BACKGROUND OF THE INVENTION
This invention relates to a transmission housing, or more specifically, to a transmission housing having an integrally formed lubrication system.
Transmissions have lubrication systems that circulate lubricating fluid within the transmission housing to various transmission components to reduce the friction of those components and lower the temperature of the transmission. The lubrication system may be discussed in terms of three main portions: the collection system, the distribution system, and the pump which draws fluid from the collection system and moves it through the distribution system.
Typically, the collection and distribution systems utilize external tubing connected to the pump to carry the oil throughout the transmission. For example, an inlet tube may be submersed in a sump portion, which holds the oil, so that oil may be drawn from the sump and distributed to the transmission components. The tubing must be packaged around the transmission components within the housing. Further, the tubing must be secured to the housing to prevent any movement during transmission operation. One example is a distribution tube that extends though a hole in a wall within the housing over the gears. Using, many separate components adds cost to the transmission and poses design problems. Therefore, what is needed is oil passages integral with the transmission housing so that components may be eliminated while still achieving a robust design.
SUMMARY OFF THE INVENTION AND ADVANTAGES
The present invention provides a transmission having an integral lubrication system for delivering lubrication fluid to transmission components. The lubrication system has a housing with a sump portion for holding the fluid. The lubrication system also includes a pump assembly with inlet and outlet chambers wherein the pump assembly moves the fluid from the inlet chamber to the outlet chamber. The housing has a collection system with an inlet passageway which interconnects the inlet chamber and the sump to provide fluid communication between them. The housing has a distribution system with a plurality of fluid distribution ports for delivering the fluid to the transmission components. The distribution system interconnects said distribution ports and said outlet chamber to provide fluid communication between them. First, second, and third passageways are integrally formed within various portions of the housing and deliver the fluid to bearing portions of the shafts and to the transmission gears.
Accordingly, the above described invention provides a lubrication system that eliminates the external tubing of the prior art.
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Garrett Peggy M.
Picone Kenneth T.
Scheib Patrick L.
Bonck Rodney H.
Carlson & Gaskey & Olds
ZF Meritor L.L.C.
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