Low cost, single stroke, electromagnetic pre-charge pump for controlled brake systems
US6386842B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 26, 2001 |
| Grant date | May 14, 2002 |
| Priority date | — |
| Expiry date | Jan 26, 2021 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B23/10
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A fluid pump assembly for pumping hydraulic fluid through a controlled brake system includes a housing defining a pumping chamber. The chamber communicates with a hydraulic fluid circuit that operates the controlled brake system. A piston plunger is disposed within the chamber with a shaft affixed to the plunger. An electric coil is affixed to a casing having the shaft inserted therethrough. The coil is coaxially aligned with the shaft. The coil generates a magnetic field through an armature affixed to a distal end of the shaft disposed outside the chamber when receiving electrical current. The magnetic field draws the armature towards the casing for pumping hydraulic fluid from the chamber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.