Pre-filled power hydraulic system
US5188204A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 13, 1990 |
| Grant date | Feb 23, 1993 |
| Priority date | — |
| Expiry date | Sep 13, 2010 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16D2500/1026
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A motor vehicle has a manually operated change speed gearbox driven by an internal combustion engine through a clutch which is automatically disengageable and re-engageable by operation of a power hydraulic clutch control. The hydraulic control comprises a fluid reservoir connected by a conduit to a control valve connected to the reservoir by a conduit which includes a pump and a one-way valve and a pressure accumulator and a piston and cylinder or fluid pressure operated actuator connected by piping to the control valve. The clutch is operated by the actuator causing disengagement of the clutch when the control valve is operated to relieve fluid pressure in the actuator. The hydraulic control is assembled and filled with hydraulic fluid at some place which can be distant from the vehicle manufacturer's production line. The filled control is transported to where the vehicle is being made and the control is installed in the vehicle; possibly after the filled control has been stored first.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.