Pneumatic servomotor with controlled power-assist positioning
US6138548A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 5, 1999 |
| Grant date | Oct 31, 2000 |
| Priority date | — |
| Expiry date | Apr 5, 2019 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T13/57
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
The invention relates to a pneumatic booster operated by a plunger (9) housed in a bore (61) and carrying a moving seat (102) intended to interact selectively with a shut-off member (111), this member being itself capable of interacting selectively with a fixed seat (101). According to the invention, the plunger (9) comprises a cylindrical body (91) and a collar (92) sliding between a front stop (911) and a rear stop (912) of the body, an anterior section (921) of the collar (92) being engaged between the cylindrical body (91) and the bore (61), a posterior section (922) of the collar (92) carrying the moving seat (102), and it being possible furthermore for the collar (92) to be held temporarily stationary in the bore independently of the movement of the body (91), by means of a channel (14) and of a snap ring (13), in order to allow extended operation of the booster after a sharp braking action.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.