Power transmission having power take-off shaft and fluid control means therefor
US4275607A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 28, 1979 |
| Grant date | Jun 30, 1981 |
| Priority date | — |
| Expiry date | Jun 28, 1999 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2708/06
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A power transmission for tractors or the like and having change speed gear mechanism and also having a power take-off shaft for driving auxiliary equipment. A hydraulically actuated clutch is utilized in the transmission for selectively engaging various gear ratios. A hydraulically actuated brake is provided for disconnecting the drive shafts and locking the power take-off to the transmission housing. Operating control valve means are provided for controlling the power take-off brake and a hydraulic detent is provided for the valve. The power take-off shaft is controlled by a modulatable clutch of the duplex type which enables the operator to modulate the speed of the power take-off shift and automatically insures that the power take-off shaft is locked and the power take-off brake is disengaged. The control valve for the power take-off brake includes a hydraulic detent that can lock the operator shifted control valve in the clutch operative position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.