Expansion valve having an internal bypass
US6691924B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 30, 2002 |
| Grant date | Feb 17, 2004 |
| Priority date | — |
| Expiry date | Oct 30, 2022 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25B2313/0315
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
In an expansion valve a valve body combines an inlet and outlet in an orifice in fluid communication therewith. A closure is positioned in the valve body and is movable between an opened and closed position to allow or prevent fluid to flow through the orifice from the inlet to the outlet. The valve body defines a bypass flow path which is in fluid communication with the outlet and inlet to allow fluid to flow from the outlet to the inlet, a bypass closure positioned in the bypass flow path is movable between an opened position and a closed position so that when said closures in said closed position fluid flowing from said outlet towards an inlet causes a bypass closure to move toward said opened position allowing fluid to flow on a reverse direction from the outlet to the inlet. When the closure moves toward the opened position fluid pressure maintains the bypass closure in the dosed position allowing fluid to flow from the inlet to the outlet. The bypass closure is free floating within the valve body.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.