Hydraulic distributor for assistance power motor with return to rest position
US4565115A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 2, 1982 |
| Grant date | Jan 21, 1986 |
| Priority date | — |
| Expiry date | Aug 2, 2002 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB62D5/083
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
The distributor defines two parallel fluid circuits (15, 16) each including serially arranged first (1;1') and second (2;2') valve means actuated by the primary control member (OP) of the distributor, two distribution lines (17, 18) for selectively supplying the chambers of an assistance motor-actuator (12) derivating from said circuits (15, 16) downstream the primary valve means (1;1'), and two additional return valve means (3;3'), upstream said second valve means (2;2') coupled to the piston (13) of the actuator (12) to form a restriction in the return circuit from the actuator chamber in relieved condition and thus create an over-pressure enabling effective return of the actuator to neutral position after return of distributor to rest condition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.