Patents by Inventor Masahiro Inagaki

Masahiro Inagaki 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).

  • Publication number: 20110020162
    Abstract: A screw rotor is for use in a screw pump that pumps fluid by rotation of a pair of screw rotors engaged with each other in a rotor housing. The screw rotor includes a multiple-thread portion for pump suction side and a single-thread portion for pump discharge side. The screw rotor is formed so that the tooth profile of the multiple-thread portion is connected to the tooth profile of the single-thread portion through a boundary plane that is perpendicular to the rotation axis of the screw rotor. The first curved portion coincides with the third curved portion in the boundary plane.
    Type: Application
    Filed: July 16, 2010
    Publication date: January 27, 2011
    Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Yuya IZAWA, Shinya YAMAMOTO, Masahiro INAGAKI, Makoto YOSHIKAWA
  • Publication number: 20110017177
    Abstract: A piezoactuator of monolithic multilayer design with an overall stack has at least one piezoelectrically active partial stack with piezoceramic layers arranged one above another and electrode layers arranged between these layers, at least one piezoelectrically inactive terminating region arranged above the partial stack, and at least one transition region arranged between the partial stack and the terminating region.
    Type: Application
    Filed: October 23, 2007
    Publication date: January 27, 2011
    Inventors: Masahiro Inagaki, Harald Johannes Kastl, Takami Sakamoto, Carsten Schuh
  • Publication number: 20100327704
    Abstract: A piezoelectric actuator unit which undergoes less change in the amount of displacement and shows high durability in continuous operation under a high voltage and a high pressure over a long period of time is provided. The piezoelectric actuator unit including a multi-layer piezoelectric element having piezoelectric layers and metal layers with the piezoelectric layers and the metal layers being stacked one on another, and a case which houses the multi-layer piezoelectric element, wherein at least one of the plurality of metal layers is stress relieving layer which consists of a plurality of partial metal layers that are scattered throughout the entire region between two piezoelectric layers which adjoin the partial metal layers in the direction of stacking, and voids, and a peel-off section is formed at least in a part of the interface between the stress relieving layer and the piezoelectric layer that adjoins therewith.
    Type: Application
    Filed: October 20, 2006
    Publication date: December 30, 2010
    Applicants: KYOCERA CORPORATION, SIEMENS AKTIENGESELLSCHAFT
    Inventors: Takami Sakamoto, Masahiro Inagaki, Harald-Johannes Kastl, Carsten Schuh, Bernhard Doellgast, Atsushi Ochi
  • Patent number: 7851974
    Abstract: A piezoceramic multilayer actuator (10) has a plurality of piezoceramic layers (12), a security layer (20) and a plurality of inner electrodes (16, 18). The piezoceramic layers (12) has a piezoceramic first material sintered at a sintering temperature. The security layer (20) has a second material and is disposed between two piezoceramic layers (12). Each of the plurality of inner electrodes (16, 18) has a third material and is deposited between two piezoceramic layers (12). The degree of sintering of the second material is lower than the degree of sintering of the third material.
    Type: Grant
    Filed: February 15, 2008
    Date of Patent: December 14, 2010
    Assignee: Siemens Aktiengesellschaft
    Inventors: Bernhard Döllgast, Masahiro Inagaki, Harald Johannes Kastl, Atsushi Ochi, Takami Sakamoto, Carsten Schuh
  • Patent number: 7843114
    Abstract: A piezoceramic multilayer actuator (10) has a plurality of piezoceramic layers (12) and a security layer (20) disposed between two piezoceramic layers (12). The piezoceramic layers (12) have a piezoceramic first material sintered at a sintering temperature. The security layer (20) has a second material (32) and particles (30) at least partially embedded in the second material (32). The particles (30) have a third material different from the first material and different from the second material (32). An adhesion between the third material and the first material is weaker than an adhesion between the second material (32) and the first material.
    Type: Grant
    Filed: February 15, 2008
    Date of Patent: November 30, 2010
    Assignee: Siemens Aktiengesellschaft
    Inventors: Bernhard Döllgast, Masahiro Inagaki, Harald Johannes Kastl, Atsushi Ochi, Takami Sakamoto, Carsten Schuh
  • Patent number: 7839259
    Abstract: A structure for mounting a temperature switch on a compressor of a vehicle air-conditioner is disclosed. The switch has a cylindrical metal container and a thermally responsive element disposed on a container bottom. The structure includes a housing recess for housing the switch, a fixing cover including an upper cover and one or plural band-shaped legs downwardly extending from a peripheral edge of the cover and housed in the recess with the switch, and one or plural claws formed on the fixing cover legs. When the switch is housed in the recess, the claws are engaged with an inner surface of the recess to be locked. An adhesive is interposed between the switch and the recess when the switch is housed in the recess. The legs are constructed so that parts of the legs are buried in the adhesive when the switch is housed in the recess.
    Type: Grant
    Filed: August 2, 2005
    Date of Patent: November 23, 2010
    Assignee: Ubukata Industries Co., Inc.
    Inventors: Teruyuki Takeda, Masahiro Inagaki
  • Patent number: 7798794
    Abstract: A cross section of a tooth profile of a first screw rotor (17) perpendicular to the rotor axis includes a tooth top arc (A1B1), a tooth bottom arc (C1D1), a first curve (A1C1), and a second curve (B1D1). The first curve (A1C1) is a first trochoidal curve that connects a first end (A1) of the tooth top arc (A1B1) to a second end (C1) of the tooth bottom arc (C1D1). The second curve (B1D1) connects the second end (B1) of the tooth top arc (A1B1) to the first end (D1) of the tooth bottom arc (C1D1). The second curve (B1D1) is a composite curve formed by an involute curve (B1E1) and a second trochoidal curve (E1D1), which extend continuously from each other at a first intersection point (E1). A screw pump (11) thus suppresses leakage of fluid with improved performance.
    Type: Grant
    Filed: September 3, 2007
    Date of Patent: September 21, 2010
    Assignee: Kabushiki Kaisha Toyota Jidoshokki
    Inventors: Yuya Izawa, Shinya Yamamoto, Masahiro Inagaki, Makoto Yoshikawa
  • Publication number: 20100233006
    Abstract: A vacuum pump includes rotary shafts connected to a pair of screw-type rotors, respectively, and a pair of shaft retainers extending in the housing. Each shaft retainer supports the corresponding rotary shaft by means of a proximal bearing portion and a distal bearing portion. Each pair of the proximal and distal bearing portions are fixed in the axial direction with respect to the corresponding rotary shaft and shaft retainer. Lubricant oil is stored in an oil storage space in a gear case attached to the housing. A cooling water passage through which cooling water to cool the lubricant oil passes is formed in the gear case. A controller controls the flow rate of the cooling fluid, so that the temperature of the lubricant oil in the oil storage space is kept constant. With this configuration, when the bearing portions are fixed in the axial direction with respect to the rotary shafts and the shaft retainers, it is possible to prevent load from being applied to the bearing portions in the axial direction.
    Type: Application
    Filed: December 26, 2006
    Publication date: September 16, 2010
    Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Shinya Yamamoto, Ryosuke Koshizaka, Kentaro Ishihara, Masahiro Inagaki, Yuya Izawa
  • Publication number: 20100194247
    Abstract: A piezoceramic multilayer actuator has a first sub-stack (12, 14, 16) with a plurality of piezoceramic layers (22) and at least one internal electrode (24, 26), the piezoceramic layers (22) and the at least one internal electrode (24, 26) being laminated in an alternating manner, a second sub-stack (12, 14, 16) has a plurality of piezoceramic layers (22) and at least one internal electrode (24, 26), the piezoceramic layers (22) and the at least one internal electrode (24, 26) being laminated in an alternating manner, and a connection layer (40) arranged between the first sub-stack (12, 14, 16) and the second sub-stack (12, 14, 16), wherein the connection layer (40) is set up by a multitude of single connection points or connection lines (44) or other connection regions.
    Type: Application
    Filed: August 6, 2007
    Publication date: August 5, 2010
    Inventors: Bernhard Döllgast, Masahiro Inagaki, Harald Johannes Kastl, Atsushi Ochi, Takami Sakamoto, Carsten Schuh
  • Publication number: 20100178191
    Abstract: A cross section of a tooth profile of a first screw rotor (17) perpendicular to the rotor axis includes a tooth top arc (A1B1), a tooth bottom arc (C1D1), a first curve (A1C1), and a second curve (B1D1). The first curve (A1C1) is a first trochoidal curve that connects a first end (A1) of the tooth top arc (A1B1) to a second end (C1) of the tooth bottom arc (C1D1). The second curve (B1D1) connects the second end (B1) of the tooth top arc (A1B1) to the first end (D1) of the tooth bottom arc (C1D1). The second curve (B1D1) is a composite curve formed by an involute curve (B1E1) and a second trochoidal curve (E1D1), which extend continuously from each other at a first intersection point (E1). A screw pump (11) thus suppresses leakage of fluid with improved performance.
    Type: Application
    Filed: September 3, 2007
    Publication date: July 15, 2010
    Inventors: Yuya Izawa, Shinya Yamamoto, Masahiro Inagaki, Makoto Yoshikawa
  • Publication number: 20100154747
    Abstract: Provided is a highly durable laminated piezoelectric element wherein a stress generated at a portion, i.e., the boundary between an active region and inactive region, is reduced. A method for manufacturing such laminated piezoelectric element is also provided. The laminated piezoelectric element has a laminated structure (15) wherein a plurality of piezoelectric layers (11) and internal electrode layers (13) are alternately laminated. The piezoelectric layer (11) contains a metal element other than those elements constituting piezoelectric ceramic, i.e., the main component of the piezoelectric layer (11), and at a portion (11a) of the piezoelectric layer (11) at the vicinity of an end of the internal electrode layer (13), metal particles having a metal element as a main component exist. The content of the metal at the portion (11a) at the vicinity of the end is higher than the content of a compound of the metal element and a nonmetal element.
    Type: Application
    Filed: May 29, 2008
    Publication date: June 24, 2010
    Applicant: KYOCERA CORPORATION
    Inventors: Masahiro Inagaki, Takeshi Okamura, Tomohiro Kawamoto
  • Patent number: 7710229
    Abstract: An ignition coil includes primary and secondary coils, center and outer cores, and an ion current detector for transmitting an ion current detection output. The center core has an axial upper end defining a center core upper end surface. The outer core has an axial upper end defining an outer core upper end surface. The center core upper end surface axially protrudes upwardly relative to the outer core upper end surface. The center core upper end surface is located at a stagger distance axially from the outer core upper end surface. The stagger distance is defined such that a detection period for residual magnetic noise in the ion current detection output falls within a system requirement period of a control unit.
    Type: Grant
    Filed: July 6, 2007
    Date of Patent: May 4, 2010
    Assignee: Denso Corporation
    Inventor: Masahiro Inagaki
  • Publication number: 20100090793
    Abstract: An installation structure for a temperature switch, used for a compressor of an air conditioner for a vehicle and having a cylindrical metal container with a bottom and a circular shallow dish-like thermally actuated plate placed at the bottom of the inside of the metal container. The installation structure further has a receiving recess provided in the front face of a housing of the compressor and in which the temperature switch is received, and also has one or more claws provided on a side of the temperature switch. When the temperature switch is received in the recess, the claws are engaged with the inner surface of the recess, which causes the temperature switch to be fixed inside the receiving recess.
    Type: Application
    Filed: August 2, 2005
    Publication date: April 15, 2010
    Applicant: UBUKATA INDUSTRIES CO., LTD.
    Inventors: Teruyuki Takeda, Masahiro Inagaki
  • Publication number: 20100060110
    Abstract: A multi-layer piezoelectric element which undergo less change in the amount of displacement and shows high durability during continuous operation under a high voltage and pressure over a long period are provided. The multi-layer piezoelectric element comprises a stack having metal layers and piezoelectric layers stacked one on another, and a pair of external electrodes formed on the side faces of the stack, wherein at least one of the metal layers is stress relieving layer having partial metal layers scattered between the two piezoelectric layers and voids, wherein junction sections are formed between the two piezoelectric layers to join and are disposed on both sides of an imaginary straight line drawn to connect the center of width of one of the external electrodes and the center of width of the other of the external electrodes in a plane including the stress relieving perpendicular to the stacking direction.
    Type: Application
    Filed: October 31, 2006
    Publication date: March 11, 2010
    Applicants: KYOCERA CORPORATION, SIEMENS AKTIENGESELLSCHAFT
    Inventors: Masahiro Inagaki, Takami Sakamoto, Harald-Johannes Kastl, Carsten Schuh, Bernhard Doellgast, Atsushi Ochi
  • Publication number: 20100047104
    Abstract: A housing (2) of a Roots pump (1) supports a drive shaft (3) and a driven shaft (4) with radial bearings (32, 33) so as to be rotatable. The housing (2) is formed by joining an upper housing member (20) to a lower housing member (10). The lower housing member (10) has lower bearing support portions (13), and the upper housing member (20) has upper bearing support portions (23). Opening edges (13a) of each lower bearing support portion (13) are positioned above the centers (P1) of the bearings (32, 33). An opening width (T1) of each lower bearing support portion (13) is smaller than the diameter (D1) of the bearings (32, 33). This structure suppresses the bearings (32, 33) from being separated from the lower housing member (10) during an assembling operation of the fluid machine.
    Type: Application
    Filed: July 19, 2007
    Publication date: February 25, 2010
    Inventors: Masahiro Inagaki, Shinya Yamamoto, Makoto Yoshikawa, Yuya Izawa
  • Publication number: 20100013359
    Abstract: To provide a multi-layer piezoelectric element having high strength against breakage, high insulation and excellent displacement performance, and an injection apparatus that incorporates the same. The multi-layer piezoelectric element comprising a stack 4 constituted from a plurality of piezoelectric layers 1 stacked one on another via internal electrode layers 2, wherein at least a part of peripheral areas 31, that are disposed between two piezoelectric layers 1, 1 located adjacently in the stacking direction and are located between an edge 2a of the internal electrode layer 2 and side face 4a of the stack 4, is disperse areas where a plurality of metallic regions are dispersed via voids 21.
    Type: Application
    Filed: August 29, 2006
    Publication date: January 21, 2010
    Applicant: KYOCERA CORPORATION
    Inventors: Junya Shoji, Masahiro Inagaki, Shigenobu Nakamura
  • Publication number: 20090285711
    Abstract: A housing of a Roots pump is configured by joining a lower housing member and an upper housing member that are separable from each other. With the upper and lower housing members joined together, an upper accommodating portion and a lower accommodating portion form a front bearing accommodating portion and a rear bearing accommodating portion, which accommodate whole bearings, respectively. The Roots pump further includes bearing holders attached to the bearings and fixed to the lower housing member so that the bearings are received in the lower accommodating portion in a positioned state.
    Type: Application
    Filed: July 17, 2008
    Publication date: November 19, 2009
    Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Masahiro Inagaki, Shinya Yamamoto, Makoto Yoshikawa, Yuya Izawa
  • Patent number: 7497672
    Abstract: A screw pump includes a housing and a pair of intermeshing screw rotors. An end face of the rotor adjacent to an inlet port of the housing is provided with an inlet opening. Each rotor has a first portion whose lead angle changes. The first portions and the housing cooperate to form an inlet space. During rotation of the rotors, communication between the inlet space and the inlet port is blocked by the first portions and the housing thereby to form a closed pump space adjacent to the inlet space. Volume of the pump space is set smaller than the maximum volume of the inlet space. A closure member is provided which covers at least a part of the inlet openings. The closure member closes the inlet space when the volume of the inlet space exceeds that of the pump space.
    Type: Grant
    Filed: August 9, 2007
    Date of Patent: March 3, 2009
    Assignee: Kabushiki Kaisha Toyota Jidoshokki
    Inventors: Masahiro Inagaki, Shinya Yamamoto, Makoto Yoshikawa, Yuya Izawa
  • Patent number: 7484943
    Abstract: A screw pump includes a housing and a pair of intermeshing screw rotors. The housing has an inlet port and an outlet port. Each rotor has a first portion whose lead angle decreases. The first portion and the housing form an inlet space and a pump space. Winding angle of the first portion has a first region and a second region. The first region is located in a predetermined range from the end on the first portion adjacent to the inlet port toward the outlet port. The second region is located adjacent to the first region. Reduction rate of the lead angle of the first portion in the first region is set smaller than that in the second region. The maximum lead angle of the first portion is set smaller than a lead angle which decreases at a constant rate in the first region and the second region.
    Type: Grant
    Filed: August 9, 2007
    Date of Patent: February 3, 2009
    Assignee: Kabushiki Kaisha Toyota Jidoshokki
    Inventors: Yuya Izawa, Shinya Yamamoto, Masahiro Inagaki, Makoto Yoshikawa
  • Patent number: 7458790
    Abstract: A vacuum pump includes a housing assembly having an oil-reservoir chamber in which a lubricating oil is stored; a pair of screw rotors disposed in the housing assembly and engaged with each other; a pair of rotary shafts connected to the rotors, respectively; a plurality of bearings supporting each of the rotary shafts and having an opening; an oil-feed pump for feeding the lubricating oil from the oil-reservoir chamber to the bearing; an oil-circulation passage provided for circulating the lubricating oil from the oil-feed pump to the oil-reservoir chamber through the bearing; a cover provided at the opening of the bearing to close the opening of the bearing with a clearance remained, the cover permitting the lubricating oil to enter the bearing through the clearance; and an oil-escape passage provided adjacent to the bearing for returning to the oil-reservoir chamber the lubricating oil not entering the bearing.
    Type: Grant
    Filed: October 31, 2006
    Date of Patent: December 2, 2008
    Assignee: Kabushiki Kaisha Toyota Jidoshokki
    Inventors: Shinya Yamamoto, Ryosuke Koshizaka, Yuya Izawa, Masahiro Inagaki, Kentaro Ishihara