Modular hydrostatic transmission

US10167937B2 · kind B2 · utility

Assignee

• Parker-Hannifin Corporation · US

Inventors

• Michael Tholan Crosby · Jonesborough, US
• Matthew Herman Simon · Kalamazoo, US
• David Mark Heathcoat, Jr. · Cleveland, US
• Jason Scot Richardson · Chuckey, US
• John Matthew Rector · Elizabethton, US
• Raymond Collett · Put-in-Bay, US
• Somer Renee Malone · Chuckey, US

Key dates

• Filing date: Feb 14, 2014
• Grant date: Jan 1, 2019
• Expiry date: Sep 28, 2034

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B60Y2304/01
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A center section/motor sub-assembly for use in a hydrostatic transmission includes a center section having a pump running face for interfacing with a pump, and a motor running face for interfacing with a motor. The center section and the motor are configured for the hydraulic separating forces of the motor to be reacted only into the center section. The center section has two internal passages between pump kidney ports and motor kidney port, and the motor kidney ports are raised in elevation relative to the pump kidney ports. The internal passages run parallel to each other as they rise in elevation. A hydrostatic transmission includes the sub-assembly enclosed by a housing, in combination with a pump and output shaft assembly. For installation, the output shaft assembly is configured as a separate component from the sub-assembly of the center section and the motor.