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Class Information
Number: 137/624.2
Name: Fluid handling > Systems > Programmer or timer > Plural, sequential, valve actuations > Variable cycle
Description: Subject matter in which the sequential operations complete a single cycle of operation (e.g., open and close a valve) and means is provided for changing the cycle.

Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8482409 System and method for conveying status information regarding an electronic faucet Jul. 9, 2013
8448657 Passive-cycle skipping valve May. 28, 2013
8201989 Fluid mixing system and fluid mixing apparatus Jun. 19, 2012
8020574 Method for closing fluid passage, and water hammerless valve device and water hammerless closing device used in the method Sep. 20, 2011
6634426 Determination of plunger location and well performance parameters in a borehole plunger lift system Oct. 21, 2003
6478040 Gas supplying apparatus and gas substitution method Nov. 12, 2002
6460563 Irrigation system apparatus, and related method Oct. 8, 2002
6443173 Automatic drain for a fire protection sprinkler system Sep. 3, 2002
6371162 Electric actuator for fluid control valves Apr. 16, 2002
6314979 Liquid injection apparatus and method for horticultural watering systems Nov. 13, 2001
6286765 Pop-up spray head irrigation system uniformity enhancement apparatus and method Sep. 11, 2001
6206042 Modular control apparatus for water treatment system Mar. 27, 2001
6138928 Center pivot suspension distribution system Oct. 31, 2000
6098898 Master control system for conserving water by sprinkler systems within a geographical region Aug. 8, 2000
6070610 Fluid operated timer for a plurality of reservoirs Jun. 6, 2000
6047719 Method and device for production of high-precision, continuous streams of mixed gas Apr. 11, 2000
5910244 Adaptable control valve for fluid treatment system Jun. 8, 1999
5908157 Portable control system for use with conventional sprinklers Jun. 1, 1999
5873388 System for stabilization of pressure perturbations from oxidation systems for treatment of process gases from semiconductor manufacturing operations Feb. 23, 1999
5791168 Apparatus for diverting a flow of water in a washing machine Aug. 11, 1998
5785244 Method and system for automatically controlling an automotive HVAC unit Jul. 28, 1998
5647388 Misting and watering system controller with light sensistive detector Jul. 15, 1997
5551598 Water run-on timer Sep. 3, 1996
5479338 Programmable controller apparatus for irrigation systems Dec. 26, 1995
5473309 Apparatus for testing an irrigation system controller and method of testing irrigation systems Dec. 5, 1995
5458048 Electro-pneumatic control device Oct. 17, 1995
5444611 Lawn and garden irrigation controller Aug. 22, 1995
5363290 Irrigation controller Nov. 8, 1994
5318065 Color valve multiplexer Jun. 7, 1994
5309942 Timer unit for controlling valves May. 10, 1994
5293554 Program controlled irrigation system Mar. 8, 1994
5287888 Irrigation controller Feb. 22, 1994
5261794 Fluid pressure feeding apparatus Nov. 16, 1993
5207354 Metered fluid valve with switchable outlets May. 4, 1993
5154349 Maintenance control apparatus for lawn watering system Oct. 13, 1992
5146991 Method for well production Sep. 15, 1992
5113892 Freeze control and drain valve May. 19, 1992
5101859 Programmable electronic control unit for water distribution systems, particularly for the irrigation of gardens, lawns, kitchen gardens, terraces and balconies Apr. 7, 1992
5082022 Multiple outlet water timer Jan. 21, 1992
5047965 Microprocessor controlled gas pressure regulator Sep. 10, 1991
5038268 Irrigation system controller apparatus Aug. 6, 1991
5033509 Structure of water flow control device Jul. 23, 1991
5021939 Computerized sprinkler control system Jun. 4, 1991
4989671 Gas and oil well controller Feb. 5, 1991
4987917 Controller synchronization to a sequencing distributing valve Jan. 29, 1991
4938256 Apparatus for the production of particular concentrations of gaseous materials as well as for mixing various gaseous materials in a specified ratio Jul. 3, 1990
4937732 Irrigation controller Jun. 26, 1990
4922433 Automatic irrigation water conservation controller May. 1, 1990
4921048 Well production optimizing system May. 1, 1990
4916617 Controller for well installations Apr. 10, 1990

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