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Class Information
Number: 137/78.5
Name: Fluid handling > Ambient condition change responsive > Atmospheric
Description: Apparatus in which control of a flow of fluid is responsive to a variation in a condition of, or in surrounding atmosphere.










Sub-classes under this class:

Class Number Class Name Patents
137/81.1 Pressure 69
137/79 Temperature 203


Patents under this class:

Patent Number Title Of Patent Date Issued
7520291 Pressure-compensated, subsea chemical injection valve Apr. 21, 2009
7306167 Light-activated mist sprayer system Dec. 11, 2007
7299817 Passive, double acting, vacuum actuated vent valve Nov. 27, 2007
7059338 Emergency shutoff valve Jun. 13, 2006
6598243 Wind operated actuator for swimming pools Jul. 29, 2003
6374850 Emergency gas line shut-off system Apr. 23, 2002
6199573 Gas flow arrestor Mar. 13, 2001
6145755 Supplemental irrigation programmer Nov. 14, 2000
5975106 Rotary actuator valve closure apparatus Nov. 2, 1999
5823433 Wind governed sprinkler control system Oct. 20, 1998
5755250 Manifold and valve assembly for a smoke/pollution detection system May. 26, 1998
5722448 Gas line automatic cut off valve Mar. 3, 1998
5694960 Hazardous gas protection system and method for automatic valve closure Dec. 9, 1997
5620025 Multi-port valve Apr. 15, 1997
5584312 Fire damper for ceiling diffuser Dec. 17, 1996
5579801 Valve closing mechanism Dec. 3, 1996
5570030 Moisture sensor and control system Oct. 29, 1996
5424649 Soil moisture sensor Jun. 13, 1995
5002101 Hose draining and recovery system Mar. 26, 1991
4995415 Partially flooded gas appliance safety shut-off method and apparatus Feb. 26, 1991
4739789 Liquid flow control valve Apr. 26, 1988
4275754 Automatic valve actuator Jun. 30, 1981
4135540 Manual or automatic drainage device for downspouts Jan. 23, 1979
4064706 Evaporative roof cooling system Dec. 27, 1977
3955186 Character image generation apparatus and CRT phototypesetting system May. 4, 1976











 
 
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