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Class Information
Number: 137/625.43
Name: Fluid handling > Systems > Multi-way valve unit > Four port reversing valves
Description: Devices comprising four way valves having an inlet port, an outlet port and two intermediate ports, the valve being selectively movable into two positions, in one position the inlet port being connected to the first intermediate port and the second intermediate port being connected to the outlet port, and in the other position the inlet being connected to the second intermediate port and the first intermediate port being connected to the outlet port.










Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8607822 Heating and air conditioning system Dec. 17, 2013
8602053 Valve assembly for a differential pressure sensor with automatic zero point calibration and flushing Dec. 10, 2013
8535051 Four-way valve Sep. 17, 2013
8505580 Reversing valve Aug. 13, 2013
8403002 Directional control fluid valve Mar. 26, 2013
8397757 Multi-way selector valve Mar. 19, 2013
8347917 Four-way valve Jan. 8, 2013
8327883 Multi-way selector valve Dec. 11, 2012
8210205 Rotary valve assembly Jul. 3, 2012
8020631 Reversible valve assembly for a pneumatic tool Sep. 20, 2011
7896029 Four-way valve Mar. 1, 2011
7857173 Solenoid control valve with quick-connect fittings for mating with an adhesive control module assembly of a hot melt adhesive dispensing system Dec. 28, 2010
7849956 On-demand electro-hydraulic steering system Dec. 14, 2010
7802633 Reversible valve assembly for a pneumatic tool Sep. 28, 2010
7631661 Straight flow reversing valve Dec. 15, 2009
7600535 Valve unit for pressure exchanger installations Oct. 13, 2009
RE40721 Duplex strainer Jun. 9, 2009
7520298 Rotary fluid flow valve Apr. 21, 2009
7431049 Valve for withdrawal of a substance from a container Oct. 7, 2008
7296756 Voltage block Nov. 20, 2007
7124777 Reversing valve with flowsplitter Oct. 24, 2006
7117882 Valve for changing the direction of flow of a fluid in pipe conduits Oct. 10, 2006
7036521 Air conserving slide valve May. 2, 2006
6976500 Valve combination for a fluid circuit with two pressure levels, particularly a combined cooling system/heat pump circuit Dec. 20, 2005
6959730 Single valve fuel cell stack gas flow and containment Nov. 1, 2005
6935372 Semiconductor processing reactive precursor valve assembly Aug. 30, 2005
6878293 Automatic valve assembly for water circulation systems Apr. 12, 2005
6860294 Four-way switching valve Mar. 1, 2005
6830073 Four-way reversing valve Dec. 14, 2004
6823897 Four-way switching valve Nov. 30, 2004
6810911 Four-way switching valve Nov. 2, 2004
6743193 Hermetic flow selector valve Jun. 1, 2004
6698452 Cycle reversing valve for use in heat pumps Mar. 2, 2004
6684651 Channel selector valve and method of driving the same, compressor with the channel selector valve, and device for controlling refrigerating cycle Feb. 3, 2004
6505647 Four-way selector valve Jan. 14, 2003
6491063 Valve assembly and airconditioning system including same Dec. 10, 2002
6295828 Apparatus for switching a refrigerant channel of an air conditioner having cooling and warming functions Oct. 2, 2001
6289931 Cycle reversing valve for use in heat pumps Sep. 18, 2001
6247497 Rotary channel-selector valve Jun. 19, 2001
6244298 Channel-switching valve and method of controlling the same, and refrigerating cycle and method of controlling the same Jun. 12, 2001
6234207 Device for changing flow of operating medium in air conditioning system May. 22, 2001
6230743 Channel-switching valve and method of controlling the same, and refrigerating cycle and method of controlling the same May. 15, 2001
6216735 Rotary channel-selector valve Apr. 17, 2001
6164331 Channel-switching valve and method of controlling the same, and refrigerating cycle and method of controlling the same Dec. 26, 2000
6158466 Four-way flow reversing valve for reversible refrigeration cycles Dec. 12, 2000
6152178 Four-way directional control valve Nov. 28, 2000
6148613 Reversing flow catalytic converter for internal combustion engine Nov. 21, 2000
6125885 Rotary channel-selector valve Oct. 3, 2000
6116264 Dual damper diverter Sep. 12, 2000
6076365 Valve assembly and airconditioning system including same Jun. 20, 2000

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