Patents by Inventor Toshikazu Harashima

Toshikazu Harashima 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: 8186980
    Abstract: A scroll-type fluid machine comprising: a casing; a fixed scroll; an orbiting scroll; and an auxiliary crank device in which to prevent the orbiting scroll from being rotated, wherein the auxiliary crank device comprises: a fixed-side bearing body provided on either a casing side or a fixed scroll side; an orbiting-side bearing body provided on an orbiting scroll side; and an auxiliary crank shaft in which a fixed-side shank is rotatably supported with the fixed-side bearing body, and an orbiting-side shank is rotatably supported with the orbiting-side bearing body; a tip of the fixed-side shank of the auxiliary crank shaft is fixed in a radius direction, and a tip of the orbiting-side shank of the auxiliary crank shaft is fixed in a radius direction; and a deformative portion is provided between the tip of the fixed-side shank and the tip of the orbiting-side shank of the auxiliary crank shaft.
    Type: Grant
    Filed: March 27, 2009
    Date of Patent: May 29, 2012
    Assignee: Hitachi, Ltd.
    Inventors: Yuji Komai, Kazutaka Suefuji, Toshikazu Harashima, Kiminori Iwano, Toshitsugu Suzuki, Yoshiyuki Kanemoto
  • Publication number: 20110070116
    Abstract: To provide a higher sealing capability irrespective of the pressure difference between compression chambers, lips having leading ends extended toward the inner surface of a recessed groove are formed. At least some of the lips have a base end that is shaped to reduce rigidity against extension of the lips.
    Type: Application
    Filed: June 11, 2010
    Publication date: March 24, 2011
    Inventors: Toshikazu HARASHIMA, Yoshiyuki Kanemoto, Koji Fukui, Susumu Sakamoto
  • Publication number: 20100166589
    Abstract: The invention reduces a centrifugal force of a orbiting scroll which acts on an auxiliary crank mechanism. A crank pin which is eccentric from a main shaft portion is formed in a drive shaft, and a main balance weight is provided in a base end side of the crank pin. The main shaft portion of the drive shaft is rotatably supported by using a main bearing, and the crank pin is attached to a orbiting bearing which is provided in a back face side of a orbiting scroll. Further, an internal gap of the main bearing is set to a value which is larger than a value obtained by subtracting the double value of an eccentric amount difference between an eccentric amount of an auxiliary crank shaft and an eccentric amount of the drive shaft from an internal gap of the orbiting bearing. Accordingly, the internal gap of the main bearing does not come to 0 even if a compressor comes to a steady state.
    Type: Application
    Filed: July 2, 2009
    Publication date: July 1, 2010
    Applicant: Hitachi Industrial Equipment Systems Co. Ltd.
    Inventors: Kiminori Iwano, Kazutaka Suefuji, Toshikazu Harashima
  • Publication number: 20090246058
    Abstract: A scroll-type fluid machine comprising: a casing; a fixed scroll; an orbiting scroll; and an auxiliary crank device in which to prevent the orbiting scroll from being rotated, wherein the auxiliary crank device comprises: a fixed-side bearing body provided on either a casing side or a fixed scroll side; an orbiting-side bearing body provided on an orbiting scroll side; and an auxiliary crank shaft in which a fixed-side shank is rotatably supported with the fixed-side bearing body, and an orbiting-side shank is rotatably supported with the orbiting-side bearing body; a tip of the fixed-side shank of the auxiliary crank shaft is fixed in a radius direction, and a tip of the orbiting-side shank of the auxiliary crank shaft is fixed in a radius direction; and a deformative portion is provided between the tip of the fixed-side shank and the tip of the orbiting-side shank of the auxiliary crank shaft.
    Type: Application
    Filed: March 27, 2009
    Publication date: October 1, 2009
    Applicant: Hitachi, Ltd.
    Inventors: Yuji Komai, Kazutaka Suefuji, Toshikazu Harashima, Kiminori Iwano, Toshitsugu Suzuki, Yoshiyuki Kanemoto
  • Patent number: 6224357
    Abstract: A fixed scroll member has a spiral wrap portion. An orbiting scroll member has a spiral wrap portion similar to the wrap portion of the fixed scroll member. The wrap portion of the orbiting scroll member has its wall thickness increased at the inner peripheral surface side thereof to have a larger wall thickness than that of the wrap portion of the fixed scroll member. The inner peripheral surface of the wrap portion of the orbiting scroll member contacts the outer peripheral surface of the wrap portion of the fixed scroll member at two contact points. On the other hand, a clearance is formed between the outer peripheral surface of the wrap portion of the orbiting scroll member and the inner peripheral surface of the wrap portion of the fixed scroll member over the entire length of the peripheral surfaces. The orbiting scroll member is constantly urged in a direction in which rotational torque acts, and thus allowed to orbit smoothly.
    Type: Grant
    Filed: September 22, 1999
    Date of Patent: May 1, 2001
    Assignee: Tokioco Ltd.
    Inventors: Yuji Komai, Toshikazu Harashima, Kazutaka Suefuji
  • Patent number: 5934890
    Abstract: Joint guides comprise mutually opposing guide portions formed on a casing and mutually opposing guide portions provided on an orbiting scroll member. A plate spring is integrally attached to a part of each guide portion. Even when a load due to rotational torque from the orbiting scroll member acts on each slider from a loading-side guide portion, resilient force from the plate spring presses a sliding surface of the slider toward a sliding surface of the loading-side guide portion, thereby preventing the formation of a gap between the sliding surface of each slider and a convexly curved portion of the associated plate spring or between the sliding surface of each slider and the sliding surface of the associated guide portion, and thus preventing the occurrence of a rattle.
    Type: Grant
    Filed: May 20, 1997
    Date of Patent: August 10, 1999
    Assignee: Tokico Ltd.
    Inventors: Hiroyuki Mihara, Kazutaka Suefuji, Toshikazu Harashima, Yuji Komai