Assisted slide for pressure compensation in a hydraulic distributor
US4649951A · kind A · utility
5Cited by
8References
2Claims
0Family size
Inventor
Key dates
| Filing date | Jul 2, 1985 |
| Grant date | Mar 17, 1987 |
| Priority date | — |
| Expiry date | Jul 2, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/87185
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A proportional hydraulic distributor with a hollow, cylindrical compensating slide, a seat at one end of the compensating slide, a reciprocable piston, an end of which is urged against the seat by a spring, a pressure assistance chamber surrounding the seat, and a choke connecting the entry pressure of the hydraulic distributor to the pressure assistance chamber. The balance of forces on the reciprocable piston and on the cylindrical compensating slide is equal to and oppositely directed with respect to the hydrodynamic drag force that develops during transitional phases of the operation of the hydraulic distributor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.