Hydraulic control valve with controlled flow and valve safety disable
US10281934B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 15, 2017 |
| Grant date | May 7, 2019 |
| Priority date | — |
| Expiry date | Jan 9, 2038 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF15B2211/8613
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An example valve includes: a valve body defining a bore, an inlet port, an outlet port, and a signal cavity; a spool movable in the bore to shift between a first position and an intermediate position, where the spool has a first end and a second end, where the outlet port is fluidly connected to the second end, where the valve body defines a spring cavity adjacent the first end of the spool to house a spring, where the first end is subjected to a load-sense pressure signal, and where when the spool is in the first position, the spool disconnects the inlet port from the outlet port and connects the inlet port to the signal cavity; and a valve actuator that, when activated, connects the signal cavity to the second end of the spool to move the spool in the bore from the first position to the intermediate position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.