Refrigeration – Refrigeration producer – Evaporator – e.g. – heat exchanger
Reexamination Certificate
2006-05-23
2006-05-23
Jones, Melvin (Department: 3744)
Refrigeration
Refrigeration producer
Evaporator, e.g., heat exchanger
C251S129150
Reexamination Certificate
active
07047763
ABSTRACT:
To provide a constant differential pressure valve which is compact in size and can be realized at low cost.In the constant differential pressure valve according to the present invention, a pipe forming a body thereof not only accommodates internal structures, such as a differential pressure control mechanism, a movable core, and a fixed core, but also serves as part of piping of a refrigeration cycle. Further, a solenoid section including a solenoid coil is disposed outside the pipe in a manner surrounding the same. Therefore, substantial integration of the differential pressure control mechanism into the piping of the refrigeration cycle can be achieved, which makes the entire constant differential pressure valve very simple in construction. As a result, reduction of the size of the constant differential pressure valve and resultant reduction of material costs and manufacturing costs can be achieved, which makes it possible to achieve low costs of the constant differential pressure valve.
REFERENCES:
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patent: 5526837 (1996-06-01), Eaker
patent: 6182457 (2001-02-01), Enderle
patent: 6367283 (2002-04-01), Enderle
patent: 04272589 (1992-09-01), None
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Communication dated Feb. 15, 2005 from the European Patent Office in Application No. EP04021619 enclosing European Search Report.
Jones Melvin
TGK Co. Ltd.
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