Patents by Inventor Shigetaka Wakisaka
Shigetaka Wakisaka has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
-
Patent number: 11976852Abstract: A utilization unit has a power source configured to receive electric power supplied from a power source system and supplies operating electric power. At least one of the first cut-off valve or the second cut-off valve is an external cut-off valve provided outside the utilization unit. The external cut-off valve is driven using the operating electric power supplied from the power source.Type: GrantFiled: July 1, 2021Date of Patent: May 7, 2024Assignee: DAIKIN INDUSTRIES, LTD.Inventor: Shigetaka Wakisaka
-
Publication number: 20210325068Abstract: A utilization unit has a power source configured to receive electric power supplied from a power source system and supplies operating electric power. At least one of the first cut-off valve or the second cut-off valve is an external cut-off valve provided outside the utilization unit. The external cut-off valve is driven using the operating electric power supplied from the power source.Type: ApplicationFiled: July 1, 2021Publication date: October 21, 2021Applicant: DAIKIN INDUSTRIES, LTD.Inventor: Shigetaka WAKISAKA
-
Publication number: 20210318041Abstract: An air conditioner includes two cut-off valves connected to respective refrigerant flow paths. At least one of the two cut-off valves is configured as a flow path switching valve configured to switch a flow path so as to block the refrigerant flow paths when a refrigerant leaks in a utilization circuit.Type: ApplicationFiled: June 24, 2021Publication date: October 14, 2021Applicant: DAIKIN INDUSTRIES, LTD.Inventor: Shigetaka WAKISAKA
-
Patent number: 9513040Abstract: An electronic expansion valve includes a valve body, a valve seat, and a stepping motor. A valve portion is formed at a forward end of the valve body. The valve seat forms a variable throttle portion between the valve portion and the valve seat by allowing the valve body to move in an axial direction. The stepping motor moves the valve portion in accordance with a pulse number. At least one part of a side surface of the valve portion is shaped so that an opening degree ratio becomes constant.Type: GrantFiled: November 13, 2012Date of Patent: December 6, 2016Assignee: DAIKIN INDUSTRIES, LTD.Inventors: Shigetaka Wakisaka, Masahiro Oka
-
Patent number: 9310114Abstract: An electronic expansion valve is provided that allows an air conditioner to control air conditioning in accordance with a valve opening point of the electronic expansion valve. Also, an air conditioner is provided that is capable of controlling air conditioning on the basis of the valve opening point of the electronic expansion valve. The electronic expansion valve is provided with a barcode corresponding to property data of the electronic expansion valve. The property data include a pulse number corresponding to a valve opening point that was measured in the process of manufacturing the electronic expansion valve. The valve opening point is set on the basis of the pulse number of a stepper motor when the flow rate of a gas flowing through a valve hole of the electronic expansion valve is equal to a set value.Type: GrantFiled: December 4, 2012Date of Patent: April 12, 2016Assignee: Daiken Industries, Ltd.Inventors: Shigetaka Wakisaka, Masahiro Oka
-
Publication number: 20150020540Abstract: An electronic expansion valve is provided that allows an air conditioner to control air conditioning in accordance with a valve opening point of the electronic expansion valve. Also, an air conditioner is provided that is capable of controlling air conditioning on the basis of the valve opening point of the electronic expansion valve. The electronic expansion valve is provided with a barcode corresponding to property data of the electronic expansion valve. The property data include a pulse number corresponding to a valve opening point that was measured in the process of manufacturing the electronic expansion valve. The valve opening point is set on the basis of the pulse number of a stepper motor when the flow rate of a gas flowing through a valve hole of the electronic expansion valve is equal to a set value.Type: ApplicationFiled: December 4, 2012Publication date: January 22, 2015Inventors: Shigetaka Wakisaka, Masahiro Oka
-
Publication number: 20140283546Abstract: An electronic expansion valve includes a valve body, a valve seat, and a stepping motor. A valve portion is formed at a forward end of the valve body. The valve seat forms a variable throttle portion between the valve portion and the valve seat by allowing the valve body to move in an axial direction. The stepping motor moves the valve portion in accordance with a pulse number. At least one part of a side surface of the valve portion is shaped so that an opening degree ratio becomes constant.Type: ApplicationFiled: November 13, 2012Publication date: September 25, 2014Inventors: Shigetaka Wakisaka, Masahiro Oka
-
Publication number: 20130175351Abstract: An expansion valve for a refrigerant circuit of a refrigeration apparatus is configured to depressurize a liquid refrigerant. The expansion valve includes a valve main body with a valve seat opening into a valve chest formed in the valve main body and a valve body movable relative to the valve chest in a reciprocating manner. An orifice is formed in the valve seat. The orifice has an orifice entrance with a smallest diameter, an orifice middle section widening in diameter along a direction of refrigerant outflow from the orifice entrance so as to form a first taper angle, and an orifice exit either widening in diameter or not in diameter along the direction of refrigerant outflow from the orifice middle section so as to form a second taper angle smaller than the first taper angle.Type: ApplicationFiled: September 22, 2011Publication date: July 11, 2013Inventors: Yoshimasa Kikuchi, Shigetaka Wakisaka, Takashi Shimamura, Keiji Tomioka, Motohiko Fukuoka
-
Publication number: 20100037642Abstract: A compressor capacity control operation mechanism includes a pilot valve (flow channel switching valve) having capillary tubes, a suction branching pipe, an intermediate pipe, and a discharge branching pipe. The suction branching pipe is connected to a first capillary tube and branches off from a compressor suction pipe. The intermediate pipe is connected to a second capillary tube and a compressor cylinder intermediate part. The discharge branching pipe is connected to a third capillary tube and branches off from a compressor discharge pipe. Preferably, the suction, intermediate and discharge branching pipes have larger diameters than the first second and third capillary tubes. Also, the pilot valve preferably has a flow channel configuration switchable between first and second states in which the first, second and third capillary tubes are connected differently in the first and second states.Type: ApplicationFiled: March 24, 2008Publication date: February 18, 2010Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Junichi Shimoda, Hisashi Takeichi, Takeomi Ukai, Shigetaka Wakisaka
-
Patent number: 6754572Abstract: A system for control of the discharge pressure of an input clutch hydraulic servo at the time of a D→N shift, in which the peak value (DN_Omega_max) rate of change of the rotational speed of an input shaft increases if the initial value (DN sol Sweep Start SLT signal) of the pressure adjusting control becomes high or low. A convergence region (DN_Omega_limit_max) is provided. On the basis of comparison between the previous peak value (DN_Omega_max_ave1) and the present peak value (DN_Omega_max_ave2), and the direction of correction, the learning is performed in accordance with various maps in a direction toward the convergence region.Type: GrantFiled: April 23, 2002Date of Patent: June 22, 2004Assignee: Aisin AW Co., Ltd.Inventors: Tsuyoshi Kawamoto, Akira Isogai, Kazufumi Ando, Yoshihisa Yamamoto, Shigetaka Wakisaka, Takayuki Kubo, Munehiro Tashiro
-
Patent number: 6736757Abstract: A downshift control determines whether a commanded downshift is a downshift oriented toward minimum shock or a downshift oriented toward responsiveness, based on inputs from various sensors. The oil pressure on the hydraulic servo which controls the releasing-side friction engagement element is controlled based on the determined downshift type (DT), so that the releasing-side friction engagement element is released in accordance with a selected one of a plurality of release patterns, i.e., release patterns corresponding to different downshift type indexes (Dt). The releasing speed of the releasing-side friction engagement element is changed in accordance with the downshift type. By properly determining the type of downshift, it becomes possible to realize a shift of a type in accordance with the driver's intention.Type: GrantFiled: February 11, 2002Date of Patent: May 18, 2004Assignee: Aisin Aw Co., Ltd.Inventors: Takayuki Kubo, Shigetaka Wakisaka, Tomokazu Nomura, Yoshizo Akita
-
Publication number: 20020198647Abstract: A system for control of the discharge pressure of an input clutch hydraulic servo at the time of a D→N shift, in which the peak value (DN_Omega_max) rate of change of the rotational speed of an input shaft increases if the initial value (DN sol Sweep Start SLT signal) of the pressure adjusting control becomes high or low. A convergence region (DN_Omega_limit_max) is provided. On the basis of comparison between the previous peak value (DN_Omega_max_ave1) and the present peak value (DN_Omega_max_ave2), and the direction of correction, the learning is performed in accordance with various maps in a direction toward the convergence region.Type: ApplicationFiled: April 23, 2002Publication date: December 26, 2002Inventors: Tsuyoshi Kawamoto, Akira Isogai, Kazufumi Ando, Yoshihisa Yamamoto, Shigetaka Wakisaka, Takayuki Kubo, Munehiro Tashiro
-
Publication number: 20020142886Abstract: A downshift control determines whether a commanded downshift is a downshift oriented toward minimum shock or a downshift oriented toward responsiveness, based on inputs from various sensors. The oil pressure on the hydraulic servo which controls the releasing-side friction engagement element is controlled based on the determined downshift type (DT), so that the releasing-side friction engagement element is released in accordance with a selected one of a plurality of release patterns, i.e., release patterns corresponding to different downshift type indexes (Dt)). The releasing speed of the releasing-side friction engagement element is changed in accordance with the downshift type. By properly determining the type of downshift, it becomes possible to realize a shift of a type in accordance with the driver's intention.Type: ApplicationFiled: February 11, 2002Publication date: October 3, 2002Inventors: Takayuki Kubo, Shigetaka Wakisaka, Tomokazu Nomura, Yoshizo Akita