Resources Contact Us Home
Browse by Category: Main > Engineering
Class Information
Number: 137/78.2
Name: Fluid handling > Ambient condition change responsive > For controlling soil irrigation
Description: Apparatus in which flow of water to the ground is controlled by means responsive to an environmental condition.

Sub-classes under this class:

Class Number Class Name Patents
137/78.3 Soil moisture sensing 165

Patents under this class:
1 2

Patent Number Title Of Patent Date Issued
5626162 Water control gauge May. 6, 1997
5400815 Timer activated irrigation system control Mar. 28, 1995
5375617 Override control system for an automatic sprinkler system Dec. 27, 1994
5355122 Rainfall detection and disable control system Oct. 11, 1994
5337777 Automatic sprinkler control override apparatus Aug. 16, 1994
5241978 Automatic sprinkler control override system Sep. 7, 1993
5193570 Electronic control unit for automatic sprinkling system Mar. 16, 1993
5139044 Fluid control system Aug. 18, 1992
5048755 Irrigation system Sep. 17, 1991
4921001 Apparatus and method for adapting sensors to an irrigation controller May. 1, 1990
4919165 Rainfall control for irrigation systems Apr. 24, 1990
4739789 Liquid flow control valve Apr. 26, 1988
4653529 Plant watering device Mar. 31, 1987
4613764 Rain detector for irrigation control system Sep. 23, 1986
4541446 In-ground control unit for watering systems Sep. 17, 1985
4488568 Rain detector for irrigation control Dec. 18, 1984
4393890 Method and device for automatic irrigation Jul. 19, 1983
4304528 Passive solar powered plant watering system Dec. 8, 1981
4185652 Subaqueous sequence valve mechanism Jan. 29, 1980
4180087 Automatic control for an adjustable member Dec. 25, 1979
4130382 Control system for irrigation pumps Dec. 19, 1978
4072269 Inhibiting spray dispersion: method and apparatus Feb. 7, 1978
4059227 Moisture sensing apparatus and method Nov. 22, 1977
4050629 Fluid dispersion method and apparatus Sep. 27, 1977
4014359 Sprinkler flow control systems Mar. 29, 1977
3992736 Expandable element check valve Nov. 23, 1976

1 2

  Recently Added Patents
Formwork release composition and use thereof
Motion compensated overlay
System and method for displaying relationships between electronically stored information to provide classification suggestions via inclusion
Planarizing agents and devices
Nonvolatile semiconductor storage device and a manufacturing method thereof
Device for preparing a body fluid for a bacteriological analysis
Statistical identification of instances during reconciliation process
  Randomly Featured Patents
Apparel with panel attachments along selected margins
Method for stripping a photo resist on an aluminum alloy
Antishrinkage agent for concrete or mortar
Method of making a surface acoustic wave device
Facility for providing a sealed work area to handle, manipulate and formulate materials
Fuel injection device for internal combustion engine
Carnation plant called `CFPC Angelica`
Dosage device
Fastener for flexible line with threaded bolt
Baptisia plant named `Solar Flare`