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Class Information
Number: 137/78.1
Name: Fluid handling > Ambient condition change responsive
Description: Apparatus which controls a flow of a fluid in response to a variation in a condition of, or in the surrounding environment.










Sub-classes under this class:

Class Number Class Name Patents
137/78.5 Atmospheric 25
137/78.4 Burner gas cutoff 26
137/78.2 For controlling soil irrigation 76
137/81.2 Underwater 55


Patents under this class:

Patent Number Title Of Patent Date Issued
8649910 Automatically adjusting irrigation controller Feb. 11, 2014
8200368 Automatically adjusting irrigation controller with temperature and rainfall sensor Jun. 12, 2012
7814932 Digital pressure gauge Oct. 19, 2010
7331345 Demand regulator protective bellows Feb. 19, 2008
7306167 Light-activated mist sprayer system Dec. 11, 2007
7238325 Very small chemical device and flow rate adjusting method therefor Jul. 3, 2007
7066192 Valve shut off device Jun. 27, 2006
6997201 Wastewater source control system Feb. 14, 2006
6935847 Spontaneous inflation inhibitor for inflatable prosthesis Aug. 30, 2005
6763845 Water freeze prevention device Jul. 20, 2004
6701951 Manual to electronic automatic valve conversion apparatus Mar. 9, 2004
6662821 System and method for closing an existing valve in response to a detected leak Dec. 16, 2003
6311897 Passive pulse generator and method for activating a fitting with a passive pulse generator Nov. 6, 2001
6296808 Method and apparatus for protecting building personnel during chemical or biological attack Oct. 2, 2001
6206337 Automatic flood control ball valve Mar. 27, 2001
6170798 Fluid detection and shutoff actuation apparatus retrofitable on fluid shutoff valve Jan. 9, 2001
6148842 Compensation element for the compensation of temperature-conditioned length changes of an object Nov. 21, 2000
6145755 Supplemental irrigation programmer Nov. 14, 2000
5967171 Shut-off system for preventing water damage Oct. 19, 1999
5934302 Control valve apparatus and method for regulating fluid flow in fluid-intake machines Aug. 10, 1999
5860247 Gas driven hydroponic system with a liquid pump outlet pipe connected to a variable buoyant float Jan. 19, 1999
5655561 Wireless system for detecting and stopping water leaks Aug. 12, 1997
5340025 Wind controlled spraying Aug. 23, 1994
5240022 Automatic shutoff valve Aug. 31, 1993
5097860 Pressure regulator for underwater breathing apparatus Mar. 24, 1992
4987913 Apparatus and method for controlling operation of storm sewage pump Jan. 29, 1991
4867191 Solar activated gas light control module Sep. 19, 1989
4535914 Automatic larvicide dispenser Aug. 20, 1985
4488567 Automatic valve closer Dec. 18, 1984
4448027 Cartridge containing water expandable members May. 15, 1984
4354571 Protective system for use in transfer of hazardous substances Oct. 19, 1982
4297686 Water detection device Oct. 27, 1981
4108195 Quick-closing fire gate Aug. 22, 1978
3991939 System for spraying and cooling vegetation Nov. 16, 1976











 
 
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