Pneumatic-hydraulic type control valve
US11572964B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 12, 2022 |
| Grant date | Feb 7, 2023 |
| Priority date | — |
| Expiry date | Jan 12, 2042 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB62J2001/085
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A pneumatic-hydraulic type control valve includes a cable attached to a fixed base, a valve base disposed in the fixed base, and a valve stem disposed in the valve base and driven by the cable to be opened. First and second oil guiding holes of the valve base communicate with each other when the valve stem is opened, and the first and second oil guiding holes of the valve base do not communicate with each other when the valve stem is closed. Further, the valve stem has a first stressed portion for bearing a fluid closing force and a second stressed portion for bearing a fluid opening force. The outer diameter of the first stressed portion is larger than that of the second stressed portion. Thus, the present invention achieves effects of simplifying structure and accurate actuation without affecting the sealing effect.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.