Expansion and check valve combination
US5524819A · kind A · utility
9Cited by
7References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 14, 1994 |
| Grant date | Jun 11, 1996 |
| Priority date | — |
| Expiry date | Feb 14, 2014 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25B41/38
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
This combination expansion valve and check valve (18) includes a valve body (22) having an inlet (24) and a outlet (26). A control-valve (28) is disposed between the inlet and the outlet which controls flow through the valve when refrigerant flow is normal and pressure is higher at the inlet than the outlet. A by-pass conduit (60) is connected between the inlet and the outlet. A check valve (58) is disposed in the by-pass conduit within the valve to block flow through the conduit when the expansion valve is operating and to permit flow through the conduit when flow is reversed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.