Electric expansion valve
US5605318A · kind A · utility
6Cited by
6References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 14, 1994 |
| Grant date | Feb 25, 1997 |
| Priority date | — |
| Expiry date | Apr 14, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B30/70
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A solenoid operated proportional control expansion valve having a tubular armature guide of non-magnetic material disposed externally of the valve blocks with a magnetic pole piece welded on the end of the tubular guide. A plastic encapsulated coil is received over the guide. The armature guide has a flange therein which in one embodiment is welded to a second flanged tube threaded into the valve blocks. In other embodiments the guide flange is directly mechanically fastened to the valve block. A cup-shaped pole frame is received over the coil for completing the magnetic flux loop about the coil.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.