Pilot-operated hydraulic directional cartridge valve
US11125351B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 17, 2019 |
| Grant date | Sep 21, 2021 |
| Priority date | — |
| Expiry date | Aug 2, 2039 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K31/122
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A pilot-operated hydraulic directional cartridge valve includes an installation sleeve and a control slide. The installation sleeve includes a bore, a first portion towards its front end face, a third portion towards its rear end face, and a second portion between the first and third portions. The first portion has a first external sealing diameter and the third portion has a second external sealing diameter greater than the first external sealing diameter. The second portion includes radial openings and possesses an external diameter greater than first external sealing diameter and smaller than the second external sealing diameter in the region of the radial openings. The control slide is guided in the axial direction on a guide diameter of the installation sleeve, behind the radial openings. The ratio between the first external sealing diameter and the guide diameter is in the range between 1.10 and 1.22.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.