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Class Information
Number: 236/80R
Name: Automatic temperature and humidity regulation > Motors > Fluid-operated > Relay > Shunt

Sub-classes under this class:

Class Number Class Name Patents
236/80A Airplane 7
236/80F Diaphragm biased open by line pressure 2
236/80G Piston-type valve operator 4
236/80B Plural main valves 8
236/80E Plural pilots by single actuator 4
236/80C Plural temperature sensors 3
236/80D Pure fluid 8

Patents under this class:

Patent Number Title Of Patent Date Issued
6684651 Channel selector valve and method of driving the same, compressor with the channel selector valve, and device for controlling refrigerating cycle Feb. 3, 2004
5934093 Servo device for regulating a refrigerant into a compressor Aug. 10, 1999
5156016 Pressure controlled switching valve for refrigeration system Oct. 20, 1992
4957238 Pneumatic variable air volume controller Sep. 18, 1990
4934156 Evaporator pressure regulating valve controlled by an auxiliary force for a refrigerator installation Jun. 19, 1990
4778104 Temperature responsive line valve Oct. 18, 1988
4715808 Thermostatic control system Dec. 29, 1987
4694989 Control installation for variable volume air diffusers Sep. 22, 1987
4648553 Regulating valve Mar. 10, 1987
4634047 Thermostatically adjustable pressure regulator Jan. 6, 1987
4630450 Expendable refrigeration control Dec. 23, 1986
4578960 Automotive refrigeration Apr. 1, 1986
4545215 Refrigeration apparatus Oct. 8, 1985
4515308 Flow stabilizer for a ventilation duct May. 7, 1985
4474550 Thermostatic control system Oct. 2, 1984
4467956 System for supplying conditioned air, thermostat therefor and methods of making the same Aug. 28, 1984
4457694 Automatic air-fuel ratio control apparatus Jul. 3, 1984
4344297 Refrigeration system Aug. 17, 1982
4331291 Pneumatic control circuit for air distribution systems May. 25, 1982
4324358 Minimum airflow control Apr. 13, 1982
4312474 Positive shutoff Jan. 26, 1982
4291832 System powered reset velocity controller Sep. 29, 1981
4267702 Refrigeration system with refrigerant flow controlling valve May. 19, 1981
4231515 Pressurized control signal apparatus Nov. 4, 1980
4120453 Air distribution unit Oct. 17, 1978
4077567 Pneumatic temperature reset differential pressure controller Mar. 7, 1978
4073433 Control apparatus for warm up cycle of air distribution system Feb. 14, 1978
4060370 Manifold gas valve with stepped flow operation Nov. 29, 1977
4047662 Terminal unit for the outlet of conditioned air in a centralized conditioning system Sep. 13, 1977
4041725 Control system for refrigeration unit Aug. 16, 1977
4042173 Method and apparatus for controlling volume air flow Aug. 16, 1977
4040564 System powered damper and control unit Aug. 9, 1977
4017025 Variable volume control box and system incorporating same Apr. 12, 1977
4007780 Heat exchange system and method and control device therefor Feb. 15, 1977
4007873 Pneumatic thermostat Feb. 15, 1977
3961748 Air distribution regulator apparatus Jun. 8, 1976
3941310 Thermostatic control for use in variable air distribution systems Mar. 2, 1976

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