Expansion valve
US4500035A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 21, 1983 |
| Grant date | Feb 19, 1985 |
| Priority date | — |
| Expiry date | Jun 21, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7834
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
An expansion valve has a refrigerant inlet passage, a refrigerant outlet passage, a valve chest to which both the passages open, a diaphragm chamber communicating with a heat-sensitive bulb through a tube of small diameter, and a valve body actuated in response to the operation of a diaphragm, the valve body being disposed facing a valve seat in the valve chest to regulate a passage defined between the valve seat and the valve body, to thereby control the flow rate of a refrigerant. The valve seat is adapted to be axially movable along the inner wall of the valve chest. In addition, means are provided for moving the valve seat in accordance with a change in pressure in the refrigerant circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.