Reaction device for brake booster
US6931979B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 25, 2002 |
| Grant date | Aug 23, 2005 |
| Priority date | — |
| Expiry date | Jan 25, 2022 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T13/575
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A reaction device wherein a ratio of input force to output force for a brake booster is sequentially changed during a brake application. An actuation force derived from a pressure differential acts on a movable wall and is communicated through a cage as an output force to an push rod. The output force is a functional ratio of the input force as modified by a reaction disc and elastic means during a brake application. The reaction device functions as a rigid member until the input force reaches a first predetermined level Fd and a first boost ratio is in effect until a second predetermined force Fe is reached and a second boost ratio is in effect until a third predetermined input force level Ff is reached and a third boost ratio is in effect until a fourth predetermined fource level is reached.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.