Power plants – Pressure fluid source and motor – Coaxial impeller and turbine unit
Reexamination Certificate
2006-10-03
2006-10-03
Look, Edward K. (Department: 3745)
Power plants
Pressure fluid source and motor
Coaxial impeller and turbine unit
C060S358000
Reexamination Certificate
active
07114331
ABSTRACT:
A pump drive shaft for an automatic transaxle wherein the cross-sectional profile of the internal flow tube has been modified to a non-cylindrical configuration to increase the flow of transmission fluid through the pump drive shaft from the torque converter. A selected surface of the non-cylindrical tube is positioned at a predetermined angular orientation within the pump drive shaft to provide increased radial clearance between the flow tube and the fluid inlets/outlets to increase the flow of transmission fluid from the torque converter. In various embodiments the flow tube is elliptical, rectangular, bi-lobular in cross-section or a variation thereof, which produces an axially extending fluid passage between the flow tube and the fluid inlets/outlets having an increased cross-sectional and flow capacity from the torque converter. The present disclosure also sets forth a method of installing the present internal flow tube within the pump drive shaft.
REFERENCES:
patent: 4177694 (1979-12-01), Lachaize
Leslie Michael
Rey Clifford F.
Sonnax Industries, Inc.
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