Four-wheel hydraulic drive system for working vehicle
US6189641A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 15, 1999 |
| Grant date | Feb 20, 2001 |
| Priority date | — |
| Expiry date | Apr 15, 2019 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60Y2200/223
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A four-wheel hydraulic drive system for a working vehicle comprising a hydraulic pump, a first hydraulic motor fluidly connected with said hydraulic pump, a pair of first driving wheels driven by said first hydraulic motor, a second hydraulic motor fluidly connected with said hydraulic pump, and a pair of second driving wheels driven by said second hydraulic motor, wherein the drive mode of said vehicle can be switched between a first four-wheel drive mode for substantially equaling the torque of said second hydraulic motor to that of said first hydraulic motor and a second four-wheel drive mode for making the torque of said second hydraulic motor smaller than that of first hydraulic motor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.