Valve unit, in particular for hydraulic brake systems with antilock and/or wheel-slip control
US5975654A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 28, 1997 |
| Grant date | Nov 2, 1999 |
| Priority date | — |
| Expiry date | Apr 28, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/87378
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
The invention pertains to a valve unit, comprising a valve housing (8) with a flow control valve, an electromagnetic actuating element (1) that is structurally arranged in series with the flow control valve in the valve housing (8), and a piston (3) that forms the flow control valve and produces an unobstructed pressure medium connection between a pressure medium source (4) and a pressure medium sink (5) in its normal position. In its normal position, the actuating element (1) is supported on one end face of the piston (3) against the force of a compression spring (2). In the operating position, the actuating element separates from the piston (3) and assumes an intermediate position in which it controls the volume flow of the pressure medium between the pressure medium source (4) and the pressure medium sink (5). This results in a simple and reliable valve construction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.