Axle driving apparatus having an improved hydraulic fluid bypass mechanism
US6370876B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 9, 2000 |
| Grant date | Apr 16, 2002 |
| Priority date | — |
| Expiry date | Nov 9, 2020 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16D31/02
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A mechanism for bypassing the flow of hydraulic fluid in a hydrostatic transmission comprised of a hydraulic pump and a hydraulic motor in fluid communication through a center section. The mechanism includes a bypass actuator rod that is moved from a first position to a second position to thereby move a plate into the hydraulic motor to lift the hydraulic motor off of the center section. The bypass actuator rod may has a generally flat surface and an opposite arcuate surface wherein the generally flat surface of the bypass actuator is positioned adjacent to the plate in the first position and the arcuate surface of the bypass actuator engages the plate in the second position. When the bypass actuator rod is in the first position the hydraulic motor is in substantial sealed engagement with the center section. When the bypass actuator rod is in the second position the hydraulic motor is lifted off of the center section and any forces applied to the actuator rod by the lifted hydraulic motor are directed substantially through the axis of the bypass actuator rod.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.