Feed pump for a hydraulic system
US5374167A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 4, 1994 |
| Grant date | Dec 20, 1994 |
| Priority date | — |
| Expiry date | Jan 4, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7927
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A feed pump for a hydraulic system that is equipped with at least one outlet valve whose valve-closing body is loaded by a valve spring. The valve-closing body is held at a distance form its valve seat by means of a gas-filled hollow-body ring so that the feed pump can be evacuated through its outlet valve for subsequent filling with a hydraulic pressure medium. With a first increase in pressure in the system, the hollow-body ring is pressed together, so that the valve-closing body slips through the hollow-body ring and reaches its valve seat, thus making the outlet valve operational. The feed pump is suitable for use as a return pump for anti-skid systems of hydraulic brake systems.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.