Pre-assembled two-stage reaction device for vacuum brake boosters
US4447897A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 21, 1982 |
| Grant date | May 8, 1984 |
| Priority date | — |
| Expiry date | May 21, 2002 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T13/577
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
The pre-assembled two-stage reaction device for a vacuum brake booster includes reaction levers which are in engagement with the booster movable wall at a first location and with the master cylinder push rod and a reaction plate connected thereto at a second location, with the first location being arranged radially farther out than the second location. The reaction levers are acted upon by a cup spring at a third location, with the cup spring being positioned on the side of the reaction levers adjacent a vacuum chamber and with the third location having a greater radius than the first location. A spring plate is arranged between the cup spring and the reaction levers whose circumferential collar is provided with flattened portions for the reaction levers on the side adjacent the reaction levers. To create a two-stage reaction device which can be pre-assembled and can also be employed in boosters having control housings made of thermoplastic material, there is arranged a supporting ring with two inward supporting edges upon which the reaction levers abut whose inner ends are tiltable about the supporting edges in the direction of the control valve, and with the reaction levers, the …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.