Clutch cylinder circuit and charging valve therefor
US4069843A · kind A · utility
17Cited by
5References
2Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 2, 1973 |
| Grant date | Jan 24, 1978 |
| Priority date | — |
| Expiry date | Apr 2, 1993 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/8671
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
Hydraulic mechanism in a transmission for engaging a clutch for forward or reverse before a clutch for first, second, or third speed. Flow of pressure fluid to the latter clutch is by way of a quick fill spool having a large orifice, a rate of rise spool, and a poppet therein having a small orifice. A restricted orifice of appreciable, straight longitudinal or helically turned length is used in connection with the spools and the poppet in such a way that, after the power unit for the clutch for first, second, or third speed is filled with fluid, pressure of the fluid in the power unit is raised at controlled rate to its maximum.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.