Hydraulic valve in particular a hydraulic transmission valve
US10927974B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 10, 2018 |
| Grant date | Feb 23, 2021 |
| Priority date | — |
| Expiry date | Feb 16, 2039 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K31/0613
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A hydraulic solenoid valve including a first port, a second port, a third port, a housing having at least one land between the first port and the second port, the at least one land including at least one balancing groove, and a spool that moves within the housing. The first port has a pressure higher pressure than a pressure of the second port, and the at least one centering groove is in communication with the third port. A flow of hydraulic fluid from the first port to the third port helps remove contamination from the at least one balancing groove and/or a flow of hydraulic fluid from the third port to the second port helps remove contamination from the at least one balancing groove.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.