Hydrostatic transmission
AssigneeHydro-Gear Limited Partnership
InventorsRay M. Hauser, Alan W. Johnson
Life of this patent
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Abstract
An improved compact design for a hydrostatic transmission having a hydraulic pump and hydraulic motor mounted on a center section in a housing, wherein the pump and motor are mounted at generally right angles to one another, and the longitudinal axis of the input shaft is located between a first and second parallel planes located at respective ends of the motor shaft and the longitudinal axis of the motor shaft is located between a third and fourth parallel planes located at respective ends of the pump shaft.
Claims30
An axle driving apparatus comprising:
- a housing forming a sump to contain a hydraulic fluid;
- a center section mounted within the housing and containing hydraulic porting;
- a hydraulic pump and hydraulic motor mounted on the center section and located in the sump;
- an input shaft having a first end, a second end and a longitudinal axis, wherein the input shaft is engaged to the hydraulic pump;
- a motor shaft having a first end, a second end and a longitudinal axis, wherein the motor shaft is engaged to and driven by the hydraulic motor;
- and
- wherein the longitudinal axis of the input shaft is located between a first plane located at the first end of the motor shaft and a second plane located at the second end of the motor shaft, and the first and second planes are perpendicular to the longitudinal axis of the motor shaft.
A center section for a hydrostatic transmission comprising:
- a first planar surface having a pump running surface formed thereon;
- at least two support structures extending generally perpendicular to the first planar surface;
- a second planar surface formed on one of the support structures and having a motor running surface formed thereon, wherein the first planar surface is perpendicular to the second planar surface;
- and
- hydraulic porting formed in the center section.
An axle driving apparatus comprising:
- a housing forming a sump to contain hydraulic fluid;
- a center section mounted in the sump and having hydraulic porting mounted therein, the center section comprising
- a first planar surface having a pump running surface formed thereon;
- at least two support structures extending generally perpendicular to the first planar surface;
- a second planar surface formed on one of the support structures and having a motor running surface formed thereon, wherein the second planar surface is perpendicular to the first planar surface;
- and
- a hydraulic pump and a hydraulic motor mounted on the center section.
Dependencies are inferred from the claim text.