Valve piston for hydraulic control valve
US4126155A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 16, 1976 |
| Grant date | Nov 21, 1978 |
| Priority date | — |
| Expiry date | Dec 16, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/8671
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A valve piston for a hydraulic control valve in which the valve piston has piston sections thereon in axially spaced relation interconnected by a reduced diameter portion with at least one piston section having passage means formed on at least one end in diametrally opposite positions and taking the form of a notch formed into the end of the piston and having a concave axially bottom region with a flow body mounted in the notch and defining therewith an arcuate recess forming one end of the passage means and opening radially and axially outwardly near the periphery of the piston section while the other end of the passage means opens axially from the piston at a radially inner region thereof. The flow body and the notch define the passage means and which terminates at the periphery of the piston in a throttling region that directs fluid along an outwardly inclined path toward the respective end of the piston section.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.