Piston for a hydraulic valve for a cam phaser and hydraulic valve for the cam phaser
US10041385B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 26, 2016 |
| Grant date | Aug 7, 2018 |
| Priority date | — |
| Expiry date | Apr 15, 2037 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01L2001/34469
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A piston for a hydraulic valve of a rotation phaser, wherein the piston is configured hollow cylindrical, wherein the piston is axially movable in a central opening extending along a first longitudinal axis of a housing of the hydraulic valve, wherein operating connections of the housing are opened and closed according to a position of the piston, wherein the piston includes check valves which prevent an unintentional outflow of a hydraulic fluid flowing through the piston from an inner cavity of the piston in flow through openings of the piston associated with the operating connections, wherein the piston is configured with check valves in its inner cavity that open towards its interior cavity, wherein the check valves are fixated by a spacer element that is arranged between the two check valves. The invention also relates to a hydraulic valve for a rotation phaser of a cam shaft.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.