Brake booster
US6715401B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 19, 2002 |
| Grant date | Apr 6, 2004 |
| Priority date | — |
| Expiry date | Sep 19, 2022 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T13/57
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
During a normal brake operation, a brake reaction from a reaction disc is transmitted to a valve plunger through an outer plunger and an inner plunger. During an emergency brake operation, as a valve plunger is driven forward through a given stroke relative to a valve body, a tubular member retracts relative to the valve body. In a servo balance condition, which is reached subsequently, the valve plunger, retracts by an amount corresponding to the retraction of the tubular member, and the outer plunger abuts against a holder. A brake reaction from the reaction disc is transmitted to the valve plunger only through the inner plunger, allowing a booster ratio to be greater and a jumping quantity to be greater than during a normal brake operation. It is possible to increase an output from a brake booster 1 rapidly in immediate response to a quick depression of a brake pedal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.