Self contained, supplemental vacuum assist unit for vehicle brake booster
US6324845A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 23, 2000 |
| Grant date | Dec 4, 2001 |
| Priority date | — |
| Expiry date | Jun 23, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T13/72
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A self contained, supplemental vacuum assist unit is provided for use with a vacuum brake booster and a source of vacuum in a motor vehicle. The unit includes, within a single housing, an electric motor, an air pump driven by the motor, a manifold defining air exhaust and assist vacuum chambers, a pair of check valves permitting air flow from the pump outlet and the assist vacuum chamber to the air exhaust chamber, an outlet from the air exhaust chamber with a fitting for connection to the vacuum source, an opening from the assist vacuum chamber with a fitting providing communication directly to the interior of the vacuum chamber of the booster, and a pressure sensor including a diaphragm, plunger, magnet with a Hall effect sensor and motor control circuitry on a circuit board within the assist vacuum chamber. The unit is compact, light weight and efficient and is designed for attachment directly to the booster with no intervening vacuum hose therebetween.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.