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Class Information
Number: 337/306
Name: Electricity: electrothermally or thermally actuated switches > Thermally actuated switches > Expansible or vaporizable fluid actuated
Description: Subject matter wherein the circuit controlling means comprises a device utilizing an expansible or vaporizable fluid whereby the change of volume or the pressure generated thereby transmits an actuating force to a movable contact or contacts.

Sub-classes under this class:

Class Number Class Name Patents
337/329 Contact structure or composition of material 13
337/326 Fluid or fluid pressure generating means 6
337/327 Housing, casing or support means 27
337/309 Multiple contacts or external circuit completion means 13
337/307 Plural expansible elements with single switch 5
337/324 With auxiliary heater 10
337/322 With bourdon tube 6
337/320 With diaphragm or bellows structure 29
337/325 With latching, locking or holding means 0
337/312 With manual or other mechanical contact control means 14
337/323 With operating range calibration or adjustment means 31
337/332 With signaling, alarm or visual indicator means 11

Patents under this class:

Patent Number Title Of Patent Date Issued
6985650 Thermal actuator and an optical waveguide switch including the same Jan. 10, 2006
6985651 Thermal actuator with offset beam segment neutral axes and an optical waveguide switch including the same Jan. 10, 2006
6983088 Thermal actuator and an optical waveguide switch including the same Jan. 3, 2006
6819216 Thermostat Nov. 16, 2004
6737952 Combined pressure responsive electrical switch and temperature sensor device May. 18, 2004
6496097 Dual circuit temperature controlled switch Dec. 17, 2002
6046666 Thermal actuator Apr. 4, 2000
5015433 Neutron activated switch May. 14, 1991
4880596 Thermionic switched self-actuating reactor shutdown system Nov. 14, 1989
4770845 Self-actuating reactor shutdown system Sep. 13, 1988
4565920 Fail safe thermal control device Jan. 21, 1986

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