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Class Information
Number: 137/551
Name: Fluid handling > With indicator, register, recorder, alarm or inspection means
Description: Apparatus comprising fluid handling means combined (1) with an indicator, register, recorder, or alarm responsive to a condition or position of a part of the apparatus or of the fluid in the apparatus or (2) with means which permits inspection of normally hidden parts of the apparatus or of the fluid inside the apparatus.

Sub-classes under this class:

Class Number Class Name Patents
137/557 Fluid pressure responsive indicator, recorder or alarm 628
137/559 Inspection means 247
137/558 Liquid level responsive indicator, recorder or alarm 240
137/552 Plural 149
137/553 Position or extent of motion indicator 146
137/552.7 Time 31

Patents under this class:
1 2 3 4 5 6

Patent Number Title Of Patent Date Issued
6404345 Electrical system Jun. 11, 2002
6401740 Permanent label for gas flow devices Jun. 11, 2002
6358408 Apparatus for the enhancement of water quality in a subterranean pressurized water distribution system Mar. 19, 2002
6325098 Valve for regulating and measuring the flowrate of a fluid Dec. 4, 2001
6269509 Automated apparatus for cleaning golf balls Aug. 7, 2001
6267138 Method and means for monitoring a control apparatus Jul. 31, 2001
6263913 Hydraulic multiway valve Jul. 24, 2001
H1962 Fast acting double puff valve Jun. 5, 2001
6229447 Indicator assembly for a pressurized gas line May. 8, 2001
6206033 Valve safety lockout and method for using Mar. 27, 2001
6192927 Valve capable of simultaneous ejection of a plurality of gases Feb. 27, 2001
6195002 Alarms for monitoring operation of sensors in a fire-suppression system Feb. 27, 2001
6192321 Method of and apparatus for deterministically obtaining measurements Feb. 20, 2001
6182445 Exhaust switch-over valve malfunction detection system of internal combustion engine Feb. 6, 2001
6155283 Intelligent valve positioner tuning Dec. 5, 2000
6155292 Method and a synthetic danger predicting and disaster preventing monitor system in which pipelines laid under the ground or through a structure are employed in their entirety for a synthetic d Dec. 5, 2000
6135146 Automatic faucet device for cleaning human body with ozone-water Oct. 24, 2000
6135719 Method and apparatus for metering injection pump flow Oct. 24, 2000
6125868 Method and apparatus for maintaining valves in a water distribution system Oct. 3, 2000
6109298 Sealed transfer valve assembly Aug. 29, 2000
6093313 Multiple discharge water faucet with self-contained filter Jul. 25, 2000
6088621 Portable apparatus for rapid re-programming of irrigation controllers Jul. 11, 2000
6074691 Method for monitoring the flow of a gas into a vacuum reactor Jun. 13, 2000
6057771 Fluid delivery apparatus May. 2, 2000
6053198 Solenoid valve control system Apr. 25, 2000
6039066 Safety hose system Mar. 21, 2000
6026843 Valve box manifold system and distribution method Feb. 22, 2000
6017017 Process and apparatus for the recognition of the state of a solenoid valve Jan. 25, 2000
5992436 Monitoring steam traps using RF signaling Nov. 30, 1999
5980735 Collection system for machine tool coolant Nov. 9, 1999
5971007 Piston valve Oct. 26, 1999
5960826 Fluid storage tank with a spill containment system Oct. 5, 1999
5950671 Over-pressure protection of a fluid sensor Sep. 14, 1999
5941273 Drain trap apparatus Aug. 24, 1999
5915415 Flow control valve assembly with temperature indicating capability for a water conveying device Jun. 29, 1999
5899225 Air tube connection state detecting apparatus May. 4, 1999
5898375 Siphon alarm and restarting mechanism Apr. 27, 1999
5887614 Overfill prevention device for storage tanks Mar. 30, 1999
5879632 Apportioning system Mar. 9, 1999
5864287 Alarms for monitoring operation of sensors in a fire-suppression system Jan. 26, 1999
5858215 Water filter containing faucet and display therefor Jan. 12, 1999
5832955 Method for detecting valve play in a cylinder valve actuated by an electromagnetic actuator Nov. 10, 1998
5803105 Systems and methods for distributing fluids Sep. 8, 1998
5782266 Pressure relief valve for a packaging container Jul. 21, 1998
5764148 Electronic water utility safety and monitoring apparatus Jun. 9, 1998
5756882 Cap low leak testing system May. 26, 1998
5738133 Liquid analyzing apparatus Apr. 14, 1998
5699830 Solenoid valve controller Dec. 23, 1997
5694963 Method and apparatus for freeze prevention of irrigation systems Dec. 9, 1997
5680329 Fire protection code compliance verification system and method Oct. 21, 1997

1 2 3 4 5 6

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