Patents by Inventor Makoto Ikegami
Makoto Ikegami 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).
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Publication number: 20060156745Abstract: An ejector cycle device includes an ejector having a nozzle portion which decompresses refrigerant flowing out of a radiator, a first evaporator for evaporating refrigerant from the ejector, and a second evaporator provided in a branch passage that is branched from a position between the refrigerant radiator and the ejector and is connected to a refrigerant suction port of the ejector. Furthermore, a throttle member is disposed in the branch passage to decompress refrigerant and adjust a flow amount of refrigerant, and the second evaporator is disposed in the branch passage between the throttle member and the refrigerant suction port. In the ejector cycle device having both the first and second evaporators, a defrosting operation of one the first and second evaporators can be performed while the other one of the first and second evaporators is operated to have a cooling function.Type: ApplicationFiled: January 19, 2006Publication date: July 20, 2006Applicant: DENSO CorporationInventors: Makoto Ikegami, Hirotsugu Takeuchi, Haruyuki Nishijima, Hiroshi Oshitani, Etsuhisa Yamada, Takuo Maehara
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Patent number: 6978637Abstract: In an ejector cycle with an ejector including a nozzle for decompressing refrigerant, an insulation member is provided on an outer surface of the ejector to suppress a heat exchange with an external side. When a suction portion of the ejector is insulated by the insulation member, pressure loss in the suction portion can be reduced, a gas refrigerant ratio at an inlet port of the mixing portion can be reduced, and a liquid refrigerant amount to be supplied to the evaporator can be increased. In addition, when a mixing portion and a diffuser portion of the ejector are insulated, it can prevent liquid refrigerant from being excessively evaporated. As a result, it can effectively restrict heat loss due to a heat exchange in the ejector with the external side.Type: GrantFiled: May 27, 2004Date of Patent: December 27, 2005Assignee: Denso CorporationInventors: Haruyuki Nishijima, Hirotsugu Takeuchi, Makoto Ikegami, Hisatsugu Matsunaga
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Publication number: 20050268644Abstract: A first evaporator is arranged on a downstream side of an ejector, and a second evaporator is connected to a refrigerant suction inlet of the ejector. A refrigerant evaporation temperature of the second evaporator is lower than that of the first evaporator. The first and second evaporators are used to cool a common subject cooling space and are arranged one after the other in a flow direction of air to be cooled.Type: ApplicationFiled: August 15, 2005Publication date: December 8, 2005Applicant: DENSO CorporationInventors: Hiroshi Oshitani, Yasushi Yamanaka, Hirotsugu Takeuchi, Katsuya Kusano, Makoto Ikegami, Yoshiaki Takano, Naohisa Ishizaka, Takayuki Sugiura
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Patent number: 6941768Abstract: When an air conditioning heat load is equal to or greater than a predetermined value, the degree of throttle opening of a nozzle arrangement of an ejector is controlled in such a manner that a coefficient of performance coincides with a target value. When the air conditioning heat load is less than the predetermined value, the degree of throttle opening of the nozzle arrangement is controlled in such a manner that a flow rate of refrigerant, which passes through the nozzle arrangement, coincides with a target value.Type: GrantFiled: July 25, 2003Date of Patent: September 13, 2005Assignee: DENSO CorporationInventors: Makoto Ikegami, Hirotsugu Takeuchi
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Publication number: 20050178149Abstract: A fluid in the state of two phase containing gas and liquid, which flows into the separating space, is revolved along an inner wall of the separating space and a liquid flow outlet is opened toward a revolving flow of the fluid and arranged in a lower portion of the separating space. The liquid-phase fluid which is a part of the revolving flow of the fluid flows out through the liquid flow outlet.Type: ApplicationFiled: February 9, 2005Publication date: August 18, 2005Inventors: Makoto Ikegami, Haruyuki Nishijima, Hirotsugu Takeuchi, Hisatsugu Matsunaga, Toru Ikemoto
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Publication number: 20050178150Abstract: A first evaporator evaporates refrigerant, which is outputted from an ejector. A refrigerant outlet of the first evaporator is connected to a suction inlet of a compressor, which is connected to a radiator. A branched passage branches a flow of the refrigerant at a corresponding branching point located between the radiator and the ejector. The branched passage conducts the branched flow of the refrigerant to a suction inlet of the ejector. A flow rate control valve is arranged in the branched passage between a radiator and an ejector on a downstream side of the radiator to depressurize refrigerant outputted from the radiator. A second evaporator is arranged in the first branched passage.Type: ApplicationFiled: February 9, 2005Publication date: August 18, 2005Inventors: Hiroshi Oshitani, Yasushi Yamanaka, Hirotsugu Takeuchi, Katsuya Kusano, Makoto Ikegami, Yasukazu Aikawa
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Patent number: 6918266Abstract: In an ejector, a nozzle is provided within a housing to defining a passage portion around the nozzle, and a suction port is provided in the housing to draw a refrigerant by entrainment of a driving refrigerant jetted from the nozzle. Further, a wall portion is provided in the housing such that the refrigerant drawn from the suction port into the passage portion is prevented from flowing toward an inlet side of the nozzle from a position of the suction port in an axial direction of the nozzle. Therefore, all of the refrigerant flowing from the suction port flows toward an outlet side of the nozzle without flowing toward the inlet side of the nozzle from the position of the suction port in the axial direction. Thus, it can prevent a large pressure loss from being caused in the refrigerant sucked from the suction port, and ejector efficiency can be effectively increased.Type: GrantFiled: April 16, 2004Date of Patent: July 19, 2005Assignee: DENSO CorporationInventors: Makoto Ikegami, Haruyuki Nishijima, Tooru Ikemoto, Yukio Ogawa, Hisatsugu Matsunaga, Takeharu Asaoka, Hirotsugu Takeuchi
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Patent number: 6877339Abstract: In an ejector cycle with an ejector including a nozzle for decompressing refrigerant, a variable throttle device is disposed upstream from the nozzle to decompress and expand high-pressure refrigerant flowing from a condenser. For example, the variable throttle device decompresses the high-pressure refrigerant in a gas-liquid two-phase state at an upstream position from the nozzle of the ejector. In addition, the variable throttle device includes a back pressure chamber having an inner pressure that changes by sensing a refrigerant temperature at a refrigerant outlet side of an evaporator, and a pressure introducing means for introducing a refrigerant pressure of a refrigerant outlet side of the evaporator to a side opposite to the back pressure chamber with respect to a diaphragm. Therefore, a pressure difference between the back pressure chamber and the side opposite to the back pressure chamber can be made smaller.Type: GrantFiled: June 15, 2004Date of Patent: April 12, 2005Assignee: DENSO CorporationInventors: Haruyuki Nishijima, Hirotsugu Takeuchi, Makoto Ikegami
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Publication number: 20040255611Abstract: In an ejector cycle with an ejector including a nozzle for decompressing refrigerant, a variable throttle device is disposed upstream from the nozzle to decompress and expand high-pressure refrigerant flowing from a condenser. For example, the variable throttle device decompresses the high-pressure refrigerant in a gas-liquid two-phase state at an upstream position from the nozzle of the ejector. In addition, the variable throttle device includes a back pressure chamber having an inner pressure that changes by sensing a refrigerant temperature at a refrigerant outlet side of an evaporator, and a pressure introducing means for introducing a refrigerant pressure of a refrigerant outlet side of the evaporator to a side opposite to the back pressure chamber with respect to a diaphragm. Therefore, a pressure difference between the back pressure chamber and the side opposite to the back pressure chamber can be made smaller.Type: ApplicationFiled: June 15, 2004Publication date: December 23, 2004Inventors: Haruyuki Nishijima, Hirotsugu Takeuchi, Makoto Ikegami
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Publication number: 20040244408Abstract: In an ejector cycle with an ejector including a nozzle for decompressing refrigerant, an insulation member is provided on an outer surface of the ejector to suppress a heat exchange with an external side. When a suction portion of the ejector is insulated by the insulation member, pressure loss in the suction portion can be reduced, a gas refrigerant ratio at an inlet port of the mixing portion can be reduced, and a liquid refrigerant amount to be supplied to the evaporator can be increased. In addition, when a mixing portion and a diffuser portion of the ejector are insulated, it can prevent liquid refrigerant from being excessively evaporated. As a result, it can effectively restrict heat loss due to a heat exchange in the ejector with the external side.Type: ApplicationFiled: May 27, 2004Publication date: December 9, 2004Inventors: Haruyuki Nishijima, Hirotsugu Takeuchi, Makoto Ikegami, Hisatsugu Matsunaga
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Publication number: 20040206111Abstract: In an ejector, a nozzle is provided within a housing to defining a passage portion around the nozzle, and a suction port is provided in the housing to draw a refrigerant by entrainment of a driving refrigerant jetted from the nozzle. Further, a wall portion is provided in the housing such that the refrigerant drawn from the suction port into the passage portion is prevented from flowing toward an inlet side of the nozzle from a position of the suction port in an axial direction of the nozzle. Therefore, all of the refrigerant flowing from the suction port flows toward an outlet side of the nozzle without flowing toward the inlet side of the nozzle from the position of the suction port in the axial direction. Thus, it can prevent a large pressure loss from being caused in the refrigerant sucked from the suction port, and ejector efficiency can be effectively increased.Type: ApplicationFiled: April 16, 2004Publication date: October 21, 2004Inventors: Makoto Ikegami, Haruyuki Nishijima, Tooru Ikemoto, Yukio Ogawa, Hisatsugu Matsunaga, Takeharu Asaoka, Hirotsugu Takeuchi
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Patent number: 6770124Abstract: A chromium-free, stable, water dispersion of zinc powder is produced by incorporation, into a zinc powder, of a silane coupling agent having a mercapto group in its molecules. The coupling agent is present in an amount ranging from 0.1 to 10 parts by weight for every 100 parts by weight of the zinc powder. The composition may be used in a water base paint.Type: GrantFiled: May 20, 2003Date of Patent: August 3, 2004Assignee: Tsubakimoto Chain Co.Inventors: Makoto Ikegami, Makoto Homi
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Publication number: 20040094144Abstract: Disclosed is a reaction apparatus for organic and/or other substance(s) employing supercritical fluid(s) and/or subcritical fluid(s) permitting injection of organic substance(s) and/or other reactant substance(s) in homogeneous state(s) to reactor(s) without occurrence of clogging at location(s) of such injection, and also permitting actuation to occur in industrial fashion and at high energy efficiency. Reactor(s) (12) of this reaction apparatus comprise cylinder(s) (12a) and piston(s) (12b) provided at such cylinder(s) (12a).Type: ApplicationFiled: September 5, 2003Publication date: May 20, 2004Inventors: Makoto Ikegami, Ken Kawabe
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Publication number: 20040055326Abstract: When an air conditioning heat load is equal to or greater than a predetermined value, the degree of throttle opening of a nozzle arrangement of an ejector is controlled in such a manner that a coefficient of performance coincides with a target value. When the air conditioning heat load is less than the predetermined value, the degree of throttle opening of the nozzle arrangement is controlled in such a manner that a flow rate of refrigerant, which passes through the nozzle arrangement, coincides with a target value.Type: ApplicationFiled: July 25, 2003Publication date: March 25, 2004Inventors: Makoto Ikegami, Hirotsugu Takeuchi
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Publication number: 20040003752Abstract: A chromium-free, stable, water dispersion of zinc powder is produced by incorporation, into a zinc powder, of a silane coupling agent having a mercapto group in its molecules. The coupling agent is present in an amount ranging from 0.1 to 10 parts by weight for every 100 parts by weight of the zinc powder. The composition may be used in a water base paint.Type: ApplicationFiled: May 20, 2003Publication date: January 8, 2004Inventors: Makoto Ikegami, Makoto Homi
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Patent number: 6584794Abstract: In an ejector cycle system, hot gas refrigerant discharged from a compressor is introduced into an evaporator through a bypass passage while bypassing an ejector and a gas-liquid separator in a defrosting operation for defrosting frost generated on the evaporator. In addition, a throttle or a check valve is provided in a refrigerant passage from the gas-liquid separator to a refrigerant inlet side of the evaporator. Accordingly, in the defrosting operation, the hot gas refrigerant from the compressor can be accurately introduced into the evaporator through the bypass passage without flowing toward the gas-liquid separator.Type: GrantFiled: July 1, 2002Date of Patent: July 1, 2003Assignee: Denso CorporationInventors: Hirotsugu Takeuchi, Makoto Ikegami
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Publication number: 20030005717Abstract: In an ejector cycle system, hot gas refrigerant discharged from a compressor is introduced into an evaporator through a bypass passage while bypassing an ejector and a gas-liquid separator in a defrosting operation for defrosting frost generated on the evaporator. In addition, a throttle or a check valve is provided in a refrigerant passage from the gas-liquid separator to a refrigerant inlet side of the evaporator. Accordingly, in the defrosting operation, the hot gas refrigerant from the compressor can be accurately introduced into the evaporator through the bypass passage without flowing toward the gas-liquid separator.Type: ApplicationFiled: July 1, 2002Publication date: January 9, 2003Inventors: Hirotsugu Takeuchi, Makoto Ikegami
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Patent number: 6477857Abstract: In an ejector cycle system using carbon dioxide as refrigerant, an ejector decompresses and expands refrigerant from a radiator to suck gas refrigerant evaporated in an evaporator, and converts an expansion energy to a pressure energy to increase a refrigerant pressure to be sucked into a compressor. Because refrigerant is decompressed and expanded in a super-critical area, a pressure difference during the decompression operation becomes larger, and a specific enthalpy difference becomes larger. Accordingly, energy converting efficiency in the ejector becomes higher, and efficiency of the ejector cycle system is improved.Type: GrantFiled: March 13, 2001Date of Patent: November 12, 2002Assignee: Denso CorporationInventors: Hirotsugu Takeuchi, Kazuhisa Makida, Yoshitaka Kume, Hiroshi Ishikawa, Kunio Iritani, Satoshi Nomura, Hisayoshi Sakakibara, Makoto Ikegami
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Publication number: 20010025499Abstract: In an ejector cycle system using carbon dioxide as refrigerant, an ejector decompresses and expands refrigerant from a radiator to suck gas refrigerant evaporated in an evaporator, and converts an expansion energy to a pressure energy to increase a refrigerant pressure to be sucked into a compressor. Because refrigerant is decompressed and expanded in a super-critical area, a pressure difference during the decompression operation becomes larger, and a specific enthalpy difference becomes larger. Accordingly, energy converting efficiency in the ejector becomes higher, and efficiency of the ejector cycle system is improved.Type: ApplicationFiled: March 13, 2001Publication date: October 4, 2001Inventors: Hirotsugu Takeuchi, Kazuhisa Makida, Yoshitaka Kume, Hiroshi Ishikawa, Kunio Iritani, Satoshi Nomura, Hisayoshi Sakakibara, Makoto Ikegami
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Patent number: 5468079Abstract: A printing apparatus comprises a card transport mechanism for printing on a card-like medium. A slider is provided having a card stop against which one edge of the card stops and a holding mechanism holds the card to the slider. A guide frame is further provided having at least one guide portion engaged with the slider for moving the slider parallel to the guide frame. A motor and transmission mechanism moves the slider, whereon a card-like medium is held by the holding mechanism, along the guide member for printing.Type: GrantFiled: February 1, 1994Date of Patent: November 21, 1995Assignee: Seiko Epson CorporationInventors: Keiji Murakoshi, Mitsuhiko Nebashi, Makoto Ikegami, Noboru Otsuki