Hydraulic port safety locking device
US9915371B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 20, 2015 |
| Grant date | Mar 13, 2018 |
| Priority date | — |
| Expiry date | Mar 31, 2036 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF15B2211/8636
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
Provided is a hydraulic valve including a valve body having a first port, a second port, and a pilot port, and a piston movable in the valve body to an open position by a pilot pressure flowing through the pilot port that acts on a portion of the piston to move the piston away from a valve seat in the body to allow fluid flow between the first and second ports. The piston is then movable to the closed position by a resilient member in the absence of the pilot pressure. In this way, during an event such as a power failure of a vehicle when the pilot pressure is unavailable, the valve is closed to prevent fluid draining from a hydraulic function to prevent movement of the function without using a mechanical locking device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.