Assignee: TGK Co., Ltd.

Location: Tokyo, JP
No. of patents: 65

Number	Title	Issue Date
D621475	Expansion valve of an air conditioning system	08/10/2010
D611123	Expansion valve	03/02/2010
D589118	Expansion valve	03/24/2009
7452192	Control valve for variable displacement compressor To provide a control valve for a variable displacement compressor using a diaphragm for a pressure-sensing section, which is capable of sensing suction pressure as absolute pressure. A core, a first plunger, and a spring of a solenoid are accommodated in a bottomed ...	11/18/2008
7437881	Control valve for variable displacement compressor To provide a control valve for a variable displacement compressor, which is capable of stably operating in a pressure control area, and causing the compressor to quickly shift to operation with the minimum displacement. The control valve for a variable displacement ...	10/21/2008
7387501	Control valve for variable displacement compressor To provide a control valve which is capable of maintaining the minimum operation of a variable displacement compressor, by causing a valve section thereof to be fully opened, irrespective of the expanded or compressed state of a bellows, even when the suction pressu...	06/17/2008
7386987	Refrigerant relief device To provide a refrigerant relief device which releases refrigerant in a refrigeration cycle to the outside of a vehicle compartment, when the refrigerant releases into the vehicle compartment, or when there is a fear that the refrigerant releases into the vehicle com...	06/17/2008
7381031	Control valve for variable displacement compressor A control valve for a variable displacement compressor that is mounted on the variable displacement compressor to control pressure within a hermetic crankcase to thereby change the discharging capacity of a refrigerant. ...	06/03/2008
7316118	Expansion valve To provide an expansion valve having a low-pressure passage that is bent at right angles therein, which is reduced in untoward noise and noise of the flow of refrigerant generated when the refrigerant passes through the low-pressure passage. In an intersecting porti...	01/08/2008
7263857	Constant flow rate expansion value To reduce the degree of influence of differential pressure on a pilot valve of a constant flow rate expansion valve. The constant flow rate expansion valve comprises a restriction passage for restricting the flow rate of refrigerant introduced from a refrigerant inl...	09/04/2007
7207186	Refrigeration cycle A variable displacement compressor driven by an engine, such as an engine for driving an automotive vehicle is used as a compressor, and the capacity of the compressor is controlled by a capacity control valve such that the differential pressure between discharge pr...	04/24/2007
7121811	Capacity control valve for variable displacement compressor The object is to provide a capacity control valve for a variable displacement compressor, which is not adversely affected by pressure from a pressure-regulating chamber. The cross-sectional area of a valve hole of a high pressure-side valve seat for introducing disc...	10/17/2006
7117895	Switching valve The object of the present invention is to provide a switching valve capable of increasing the opening stroke of a valve operated by a differential pressure while saving space, thereby reducing pressure loss. A first valve is disposed between an inlet port and a firs...	10/10/2006
7117889	Three-way valve The object of the present invention is to provide a three-way valve reduced in the number of component parts and man-hours for assembling the component parts. A pressure chamber of a piston for urging a first main valve in a valve-closing direction by a spring, and ...	10/10/2006
7118088	Fluid control valve To provide a fluid control valve which is capable of preventing or suppressing degradation of the accuracy of flow rate control dependent on the lift amount of a valve element from a valve seat. An expansion valve is configured such that a valve portion and a valve ...	10/10/2006
7069949	Four-way switching valve The object of the present invention is to provide a simple-construction four-way switching valve which is simple in construction and excellent in sealability, performs switching of the operation mode without producing unusual noise, and is reduced in the number of m...	07/04/2006
7047763	Constant differential pressure valve To provide a constant differential pressure valve which is compact in size and can be realized at low cost. In the constant differential pressure valve according to the present invention, a pipe forming a body thereof not only accommodates internal structures...	05/23/2006
7040595	Constant flow rate expansion valve A constant flow rate expansion valve includes a refrigerant passage having a fixed flow path cross-sectional area smaller than that of a refrigerant inlet, a differential pressure control valve for controlling the differential pressure (P1−P2) betwee...	05/09/2006
7036744	Solenoid valve-equipped expansion valve The object of the present invention is to provide a solenoid valve-equipped expansion valve simplified in construction. A common valve element in which a valve element of an expansion valve and a valve element of a stop valve are integrally formed as a unitary membe...	05/02/2006
7028713	Switching valve The object of the present invention is to provide a switching valve capable of increasing the opening stroke of a valve operated by a differential pressure while saving space, thereby reducing pressure loss. A first valve is disposed between an inlet port and a firs...	04/18/2006
7021901	Variable displacement compressor An object of the invention is to provide a variable displacement compressor which is capable of using a solenoid control valve which does not require a large solenoid force. The compressor is configured such that an electromagnetic proportional flow rate control val...	04/04/2006
7018179	Capacity control valve for variable displacement compressor The object of the present invention is to provide a capacity control valve for a variable displacement compressor, which is not adversely affected by pressure from a pressure-regulating chamber. A three-way valve structure is formed in which a high-pressure valve el...	03/28/2006
7014427	Capacity controller of capacity variable compressor A small sized and structurally simple capacity controller having a wide control range of a compressor with variable capacity adds a differential pressure to an inhalation pressure on an arbitrary level by a piston valve body actuated by a solenoid and by the inhalat...	03/21/2006
6997000	Refrigeration system and method of operation therefor The object of the present invention is to prevent refrigerant from flowing out into a vehicle compartment due to damage to an evaporator or piping associated therewith. A solenoid valve is arranged at an inlet of an evaporator, and a check valve is arranged at an ou...	02/14/2006
6997001	Method of operating a refrigeration cycle The object of the present invention is to provide a method of operating a refrigeration cycle which is capable of preventing oil from staying in an evaporator and ensures high coefficient of performance as well as sufficient circulation of oil. An electronic expansi...	02/14/2006
6986498	Differential pressure valve A differential pressure valve simplified in construction includes a piston integrally formed with a main valve element and arranged on the upstream side of a main valve to define a chamber for introducing refrigerant from an inlet port. The piston has an orifice and...	01/17/2006
6966365	Outflow prevention device To provide an outflow prevention device which is capable of preventing refrigerant from flowing out into a vehicle compartment even when an evaporator has ruptured. The outflow prevention device comprises a shut valve arranged in a passage via which refrigera...	11/22/2005
6966195	Air conditioning system To provide an air conditioning system which simultaneously eliminates shortage of lubricating oil of a variable displacement compressor and degradation of cooling efficiency of the system. An air conditioning system is configured to have a variable displacement comp...	11/22/2005
6957663	Solenoid control valve The object of the present invention is to provide a solenoid control valve simple in construction and low in cost, realized by reducing the number of component parts, eliminating screw-joined portions, and minimizing the use of rubber O rings. A valve hole of a pilo...	10/25/2005
6889554	Method of adjusting pressure sensor It is an object to provide a method of adjusting a pressure sensor, in which adjustment of a diaphragm portion and adjustment of an amplification circuit connected to the diaphragm portion are simplified. A flexible circuit board having the amplification circuit mou...	05/10/2005
6883545	Three-way switching valve The object of the present invention is to provide a three-way switching valve having a valve mechanism compact in size, and capable of changing a flow of a high-pressure fluid, without internal leakage of the fluid. A compact pilot-operated three-way switching valve...	04/26/2005
6866242	Proportional valve The object of the present invention is to provide a proportional valve which does not open or close by itself and is free of internal leakage. A valve element is formed integrally with a piston having a cross-sectional area equal to that of a valve hole constituting...	03/15/2005
6860294	Four-way switching valve To provide a four-way solenoid valve having a three-way solenoid valve of which non-concentricity between a valve element and a valve hole is small, if any. A core of a three-way solenoid is integrally formed with a refrigerant passage extending axially therethrough...	03/01/2005
6823897	Four-way switching valve A four-way switching valve free from leakage of a refrigerant is disclosed. The valve includes two three-way switching valves arranged side by side, each having a pressure-regulating chamber, a piston, and a plug coaxially arranged. One of the pressure-regulating ch...	11/30/2004
6804970	Method of controlling refrigeration cycle The object of the present invention is to provide a method of controlling a refrigeration cycle such that maximum refrigerating capacity can be educed when the refrigeration cycle is started, the driving torque of a variable displacement compressor can be reduced wh...	10/19/2004
6783110	Proportional solenoid valve To provide a small-sized and low-cost proportional solenoid valve which is capable of controlling a bidirectional fluid flow. A core is fixed in a pipe, and a hollow shaft having an extreme end thereof closed by a valve seat and a portion adjacent thereto formed wit...	08/31/2004
6662581	Variable displacement compressor and displacement control valve for variable displacement compressor A displacement control valve that performs transition between operating capacities in a reduced time period. A valve element for introducing refrigerant from a discharge chamber into a pressure-regulating chamber after reducing discharge pressure Pd of th...	12/16/2003
6662582	Displacement control valve A displacement control valve which is capable of shortening a time period for transition in operating displacement, and operating without necessitating a large solenoid force even if the size of the valve is increased so as to increase the amount of refri...	12/16/2003
6622924	In-car sensor equipped with aspirator fan motor An object of the invention is to provide a low-cost in-car sensor equipped with an aspirator fan motor, which is capable of detecting temperature and humidity. A thermistor for detecting temperature and a humidity sensor are arranged at desired positions ...	09/23/2003
6612503	Expansion valve The object of the present Invention is to provide an expansion valve including a pressure sensor which enables reduction of parts cost. A pressure sensor is screwed into an opening of a body block, which communicates with a space accommodating a valve ele...	09/02/2003

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Assignee: TGK Co., Ltd.