Hybrid check valve
US10174852B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 9, 2014 |
| Grant date | Jan 8, 2019 |
| Priority date | — |
| Expiry date | Dec 11, 2034 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B2200/04
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An assembly is provided that can include check valve. The check valve can include a ball positioned between an inflow line and an outflow line. The ball can be movable between (i) an open position at which a fluid is allowed to flow between the inflow line and the outflow line and (ii) a closed position at which the fluid is prevented from flowing between the inflow line and the outflow line. The assembly can also include a spring positioned adjacent to the ball and operable to bias the ball in a closed position. The assembly can further include a poppet positioned adjacent to the ball. The poppet can be movable in response to a communication of a pilot pressure to the poppet. Further, the ball can be movable to the closed position in response to a force applied by the poppet.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.