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Class Information
Number: 236/80G
Name: Automatic temperature and humidity regulation > Motors > Fluid-operated > Relay > Shunt > Piston-type valve operator

Patents under this class:

Patent Number Title Of Patent Date Issued
6290139 Hydraulically actuated mixing valve Sep. 18, 2001
4475686 Valve for liquid injection into a refrigerant evaporator Oct. 9, 1984
4291544 Control apparatus for the low pressure evaporator of a refrigeration plant Sep. 29, 1981
4248058 Differential piston type reversing valve construction, system utilizing the same and method of making Feb. 3, 1981

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