Rider transaxle having hydrostatic transmission
US5201692A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 9, 1991 |
| Grant date | Apr 13, 1993 |
| Priority date | — |
| Expiry date | Jul 9, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60K17/16
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A transaxle with a hydrostatic transmission which is compact, reliable and economical to manufacture, including a novel means for hydraulically reducing the speed of the input to the transaxle; an improved differential which is stronger and less complicated than prior art designs; a longer lasting, more effective means of preventing oil leakage from the axle shafts in the transaxle housing; a center section for the hydrostatic transmission supporting the output drive shaft, eliminating the need for additional bearing support; an improved means for hydraulically bypassing the hydrostatic transmission and a unique check valve arrangement for maintaining oil pressure within the hydrostatic transmission. The hydrostatic transmission also includes a pump and a motor whose orientation to one another may be varied according to the space requirements dictated by the size and configuration of the vehicle through the use of a helical gear.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.