Center section for a hydrostatic transaxle
AssigneeHydro-Gear Limited Partnership
InventorsEric S. Phanco, Kenneth J. Rawski
Life of this patent
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Abstract
A center section for a hydraulic pump and motor mounted in a transaxle casing. The center section has a protuberance formed thereon, a pair of flat surfaces separate from the protuberance and at least one fastener opening formed in the center section for receiving a fastener engaged to the casing. The protuberance is adapted to mate with a center section locator formed in the casing to establish an X-Y orientation for a central axis while the fastener provides a Z-axis locator for the center section.
Claims24
A center section for a hydrostatic transaxle comprising a casing carrying a hydraulic pump driven by an input shaft and a hydraulic motor drivingly linked to an axle shaft, the hydraulic pump being in fluid communication with the hydraulic motor via porting formed in the center section to transfer a motive force received via the input shaft to the hydraulic motor to drive the axle shaft, wherein the center section comprises:
- a pump running surface on which the hydraulic pump is rotationally mounted;
- a motor running surface on which the hydraulic motor is rotationally mounted;
- a protuberance adapted to mate with a center section locator formed in the casing to establish an X-Y orientation for a central axis of the protuberance;
- a pair of flats adapted to mate with features formed in the casing to locate the center section rotationally;
- and
- at least one opening for a fastener that provides a Z-axis locator for the center section.
A center section for a hydrostatic transaxle comprising a casing carrying a hydraulic pump driven by an input shaft and a hydraulic motor drivingly linked to an axle shaft, the hydraulic pump being in fluid communication with the hydraulic motor via porting formed in the center section to transfer a motive force received via the input shaft to the hydraulic motor to drive the axle shaft, wherein the center section comprises:
- a pump running surface on which the hydraulic pump is rotationally mounted;
- a motor running surface of which the hydraulic motor is rotationally mounted;
- at least one fastener opening;
- and
- a cylindrical protuberance formed on the center section and adapted to mate with a center section locator formed in the casing.
A center section for a hydrostatic transaxle comprising a casing carrying a hydraulic pump driven by an input shaft and a hydraulic motor drivingly linked to an axle shaft, the hydraulic pump being in fluid communication with the hydraulic motor via porting formed in the center section to transfer a motive force received via the input shaft to the hydraulic motor to drive the axle shaft, wherein the center section comprises a means for locating the center section in the casing, wherein the means comprises a protuberance formed on the center section, a pair of flat surfaces on the center section separate from the protuberance and at least one fastener opening formed in the center section for receiving a fastener engaged to the casing.
Dependencies are inferred from the claim text.