Patents by Inventor Masaaki Hamada

Masaaki Hamada 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: 7780154
    Abstract: A fluid-filled type engine mount having a pressure receiving chamber and an equilibrium chamber connected together through a first orifice passage, and an intermediate chamber connected to the equilibrium chamber through a second orifice passage. The intermediate chamber is partially defined by a movable film, and the pressure-receiving chamber and the intermediate chamber are situated to either side of the movable film. The movable film is a tabular rubber elastic body, and is imparted with non-linear spring properties in response to elastic deformation in a width direction thereof so that its deformation during input of idling vibration occurs in a low spring properties zone, whereas its deformation during input of vibration of greater amplitude than the idling vibration in a higher frequency range than a resonance frequency of the first orifice passage reaches a high spring properties zone.
    Type: Grant
    Filed: July 6, 2006
    Date of Patent: August 24, 2010
    Assignee: Tokai Rubber Industries, Ltd.
    Inventors: Akira Katagiri, Tatsuya Suzuki, Masaaki Hamada
  • Patent number: 7752289
    Abstract: An apparatus and a method capable of efficiently and accurately constructing an access control configuration having high security are realized. Only the MAC address of a controller (client) 351 authorized by a user is authenticated and registered in a MAC address table of a device 352, and the device 352 performs MAC address filtering for permitting access by the controller 351 (client) which is authenticated and registered in the MAC address table. Furthermore, by making a registration completion notification and by performing version adjustment, a reliable access control configuration is constructed. The device authentication apparatus 350 avoids access from an unauthorized party which is not authenticated and registered, and makes the presence of a server not known to the controller which attempts to illegally perform device authentication. Therefore, access control with high security is realized.
    Type: Grant
    Filed: August 29, 2003
    Date of Patent: July 6, 2010
    Assignee: Sony Corporation
    Inventors: Norifumi Kikkawa, Tatsuya Igarashi, Yoichi Kobori, Takehiko Morita, Yoshiyuki Takaku, Noriyuki Sakoh, Masaaki Hamada
  • Publication number: 20090321202
    Abstract: A power unit support structure adapted to provide vibration-damped support of an power unit of an automobile of FR longitudinal engine design on a vehicle body via engine mounts situated at two locations towards a vehicle front end and one location towards a vehicle back end, respectively. Of the engine mounts disposed at the three locations, a fluid-filled vibration-damping device exhibiting vibration-attenuating action based on flow action of non-compressible fluid filling the interior thereof is employed as a rear engine mount disposed at the vehicle back end, and the vibration-attenuating action based on the flow action of the non-compressible fluid is exhibited against vibration input in a vehicle longitudinal direction.
    Type: Application
    Filed: June 22, 2009
    Publication date: December 31, 2009
    Applicant: TOKAI RUBBER INDUSTRIES, LTD.
    Inventors: Masaaki Hamada, Yoshio Ihara, Ryota Ishikawa
  • Patent number: 7523214
    Abstract: An apparatus and a method are proposed which enable an improved control processing for live streaming distribution of tuner received content from a server to a client. By setting a URL to a channel list as a set of channels, and transmitting a content acquisition request from the client to the server, wherein the channel list URL is designated, to a server, the client can collectively obtain rights to control all content on the channels listed in the channel list. By continuously using an HTTP connection set on the basis of a channel list, the client can switch channels.
    Type: Grant
    Filed: April 5, 2004
    Date of Patent: April 21, 2009
    Assignee: Sony Corporation
    Inventors: Norifumi Kikkawa, Tatsuya Igarashi, Hiroyuki Mitsubori, Yoichi Kobori, Masaaki Hamada
  • Publication number: 20070013115
    Abstract: A fluid-filled type engine mount having a pressure receiving chamber and an equilibrium chamber connected together through a first orifice passage, and an intermediate chamber connected to the equilibrium chamber through a second orifice passage. The intermediate chamber is partially defined by a movable film, and the pressure-receiving chamber and the intermediate chamber are situated to either side of the movable film. The movable film is a tabular rubber elastic body, and is imparted with non-linear spring properties in response to elastic deformation in a width direction thereof so that its deformation during input of idling vibration occurs in a low spring properties zone, whereas its deformation during input of vibration of greater amplitude than the idling vibration in a higher frequency range than a resonance frequency of the first orifice passage reaches a high spring properties zone.
    Type: Application
    Filed: July 6, 2006
    Publication date: January 18, 2007
    Applicant: TOKAI RUBBER INDUSTRIES, LTD.
    Inventors: Akira Katagiri, Tatsuya Suzuki, Masaaki Hamada
  • Patent number: 7137476
    Abstract: A mounting structure for mounting a steer-by-wire vehicle steering apparatus on a vehicle body side, comprising: a housing for rotatably retaining therein one end of a steering shaft of the steering apparatus, while retaining therein an actuator for exerting reactive force in order to impart reactive force in response to turning of an operating member fastened to an other end of the steering shaft that projects from the housing and rotatable together with the steering shaft; and a plurality of mounting portions disposed about a turning axis of the operating member so as to extend diametrically outwardly, the mounting portions fastened at respective fastener portions thereof to a vehicle body side at multiple locations, at least one of the fastener portions of the mounting portions is fastened to the body side via a rubber elastic body so that the housing is elastically supported on the body side.
    Type: Grant
    Filed: March 21, 2005
    Date of Patent: November 21, 2006
    Assignee: Tokai Rubber Industries, Ltd.
    Inventors: Akira Katagiri, Masaaki Hamada
  • Publication number: 20060242664
    Abstract: An apparatus and a method are proposed which enable an improved control processing for live streaming distribution of tuner received content from a server to a client. By setting a URL to a channel list as a set of channels, and transmitting a content acquisition request from the client to the server, wherein the channel list URL is designated, to a server, the client can collectively obtain rights to control all content on the channels listed in the channel list. By continuously using an HTTP connection set on the basis of a channel list, the client can switch channels.
    Type: Application
    Filed: April 5, 2004
    Publication date: October 26, 2006
    Inventors: Norifumi Kikkawa, Tatsuya Igarashi, Hiroyuki Mitsubori, Yoichi Kobori, Masaaki Hamada
  • Publication number: 20060195545
    Abstract: The present invention provides an apparatus and method capable of efficiently sending an event corresponding to content to be transmitted from a server to each client. A content providing server assigns a session ID to each client on condition that the server receives an event notification request, which specifies an event URL, from the client and then manages an event notification process on the basis of the event URL and the session ID. When respectively transmitting pieces of content to a plurality of clients, the server determines event information to be transmitted on the basis of each event URL regarding the corresponding piece of content and controls event notification timing for each client on the basis of the corresponding session ID. According to the present configuration, the load of managing data in the event notification process on the server can be reduced and a correct event synchronized with transmission content can be sent to each client.
    Type: Application
    Filed: February 26, 2004
    Publication date: August 31, 2006
    Applicant: Sony Corporation
    Inventors: Norifumi Kikkawa, Yoichi Kobori, Takehiko Morita, Masaaki Hamada, Tatsuya Igarashi
  • Patent number: 7097168
    Abstract: A fluid filled engine mount including: a pressure-receiving chamber and an equilibrium chamber connected via an orifice passage tuned to a frequency band of engine idling vibrations; an orifice control member operable by means of negative pressure exerted from an external space so as to restrict flow of the fluid through the orifice passage when an absolute value of the exerted negative pressure is greater than a predetermined value; and a negative pressure conduit of direct connection type, adapted to always introduce negative pressure available from an air intake port of an internal combustion engine to the orifice control member.
    Type: Grant
    Filed: March 26, 2004
    Date of Patent: August 29, 2006
    Assignee: Tokai Rubber Industries, Ltd.
    Inventors: Hiroyuki Ichikawa, Syouji Akasa, Masaaki Hamada, Yuichi Ogawa
  • Publication number: 20060184532
    Abstract: To provide an apparatus and method for efficiently displaying image content, which is sent and received between a server and a client, in a correct direction. An image content providing server stores, as property information, original angle information indicating correct directions of image content as metadata of the image content. The server generates content information including the original angle information and sends the generated content information to a client. This allows the client to understand the correct direction of the image content received from the server, and to obtain and display image data in the correct direction by performing rotation processing in the client device based on the obtained information or to request the server to perform the rotation processing.
    Type: Application
    Filed: December 16, 2003
    Publication date: August 17, 2006
    Inventors: Masaaki Hamada, Morifumi Kikkawa, Yoshiki Tanaka, Takehiko Morita
  • Patent number: 7025341
    Abstract: A fluid filled engine mount including: a pressure-receiving chamber and an equilibrium chamber connected via a first orifice passage tuned to excite resonance of fluid flowing therethrough to engine shakes; a partition rubber plate partially defining a pressure receiving chamber and tuned to perform absorption of a fluid pressure fluctuation in the pressure-receiving chamber to booming noises; an oscillating chamber connected to the pressure receiving chamber via a second orifice passage tuned to excite resonance of the fluid flowing therethrough to idling vibrations; an oscillating rubber elastic plate having an expansion spring smaller than that of the partition rubber plate and defining the oscillating chamber; a working air chamber applied with air pressure fluctuation with a frequency corresponding to the idling vibration during idling, and to make the working air chamber atmospheric pressure during running.
    Type: Grant
    Filed: March 26, 2004
    Date of Patent: April 11, 2006
    Assignee: Tokai Rubber Industries, Ltd.
    Inventors: Hiroyuki Ichikawa, Syouji Akasa, Masaaki Hamada
  • Publication number: 20060059168
    Abstract: An apparatus and a method are provided, which enable to perform an improved management processing based on an identifier information of a content on a server. The content providing server sets content-associated unique identifier information as property information that is a component of content-associated metadata, maintains the unique identifier information as content-associated metadata without changing the unique identifier information even if the logical/physical position of a content stored in the storage unit is changed, and maintains a setting value of unique identifier information, which is set associated with a received content, as metadata associated with the received content without changing the setting value of the unique identifier information. By this configuration, even if a content is moved between servers, a client can acquire the content based on the unique identifier.
    Type: Application
    Filed: December 16, 2003
    Publication date: March 16, 2006
    Inventors: Masaaki Hamada, Norifumi Kikkawa, Yoichi Kobori, Takehiko Morita, Toshihiro Morita, Yoshiki Tanaka, Noriyuki Sakoh, Tatsuya Igarashi
  • Publication number: 20050236216
    Abstract: A mounting structure for mounting a steer-by-wire vehicle steering apparatus on a vehicle body side, comprising: a housing for rotatably retaining therein one end of a steering shaft of the steering apparatus, while retaining therein an actuator for exerting reactive force in order to impart reactive force in response to turning of an operating member fastened to an other end of the steering shaft that projects from the housing and rotatable together with the steering shaft; and a plurality of mounting portions disposed about a turning axis of the operating member so as to extend diametrically outwardly, the mounting portions fastened at respective fastener portions thereof to a vehicle body side at multiple locations, at least one of the fastener portions of the mounting portions is fastened to the body side via a rubber elastic body so that the housing is elastically supported on the body side.
    Type: Application
    Filed: March 21, 2005
    Publication date: October 27, 2005
    Applicant: Tokai Rubber Industries, Ltd.
    Inventors: Akira Katagiri, Masaaki Hamada
  • Patent number: 6921066
    Abstract: A connector assembly/device for elastically connecting a steering wheel to a rotary member supported by a stationary member so the rotary member is rotatable upon rotation of the steering wheel, including a first member fixed to the rotary member for rotation therewith, a second member fixed to the steering wheel for rotation steering wheel, an elastic body interposed between the first and second members to elastically connect the first and second members, and a relative-rotation restrictor located between the first and second members, for restricting an amount of elastic deformation of the elastic body upon rotation of the second member relative to the first member, to restrict a maximum angle of relative rotation of the first and second members permitted by the elastic deformation of the elastic body, for thereby restricting a maximum angle of rotation of the steering wheel relative to the rotary member.
    Type: Grant
    Filed: September 15, 2003
    Date of Patent: July 26, 2005
    Assignee: Tokai Rubber Industries, Ltd.
    Inventor: Masaaki Hamada
  • Publication number: 20050021786
    Abstract: An apparatus and a method capable of efficiently and accurately constructing an access control configuration having high security are realized. Only the MAC address of a controller (client) 351 authorized by a user is authenticated and registered in a MAC address table of a device 352, and the device 352 performs MAC address filtering for permitting access by the controller 351 (client) which is authenticated and registered in the MAC address table. Furthermore, by making a registration completion notification and by performing version adjustment, a reliable access control configuration is constructed. The device authentication apparatus 350 avoids access from an unauthorized party which is not authenticated and registered, and makes the presence of a server not known to the controller which attempts to illegally perform device authentication. Therefore, access control with high security is realized.
    Type: Application
    Filed: August 29, 2003
    Publication date: January 27, 2005
    Inventors: Norifumi Kikkawa, Tatsuya Igarashi, Yoichi Kobori, Takehiro Morita, Yoshiyuki Takaku, Noriyuki Sakoh, Masaaki Hamada
  • Publication number: 20040188899
    Abstract: A fluid filled engine mount including: a pressure-receiving chamber and an equilibrium chamber connected via an orifice passage tuned to a frequency band of engine idling vibrations; an orifice control member operable by means of negative pressure exerted from an external space so as to restrict flow of the fluid through the orifice passage when an absolute value of the exerted negative pressure is greater than a predetermined value; and a negative pressure conduit of direct connection type, adapted to always introduce negative pressure available from an air intake port of an internal combustion engine to the orifice control member.
    Type: Application
    Filed: March 26, 2004
    Publication date: September 30, 2004
    Applicant: TOKAI RUBBER INDUSTRIES, LTD.
    Inventors: Hiroyuki Ichikawa, Syouji Akasa, Masaaki Hamada, Yuichi Ogawa
  • Publication number: 20040188904
    Abstract: A fluid filled engine mount including: a pressure-receiving chamber and an equilibrium chamber connected via a first orifice passage tuned to excite resonance of fluid flowing therethrough to engine shakes; a partition rubber plate partially defining a pressure receiving chamber and tuned to perform absorption of a fluid pressure fluctuation in the pressure-receiving chamber to booming noises; an oscillating chamber connected to the pressure receiving chamber via a second orifice passage tuned to excite resonance of the fluid flowing therethrough to idling vibrations; an oscillating rubber elastic plate having an expansion spring smaller than that of the partition rubber plate and defining the oscillating chamber; a working air chamber applied with air pressure fluctuation with a frequency corresponding to the idling vibration during idling, and to make the working air chamber atmospheric pressure during running.
    Type: Application
    Filed: March 26, 2004
    Publication date: September 30, 2004
    Applicant: TOKAI RUBBER INDUSTRIES, LTD.
    Inventors: Hiroyuki Ichikawa, Syouji Akasa, Masaaki Hamada
  • Patent number: 6779637
    Abstract: Disclosed is a dynamic damping device for a steering system of an automotive vehicle, which equipped with a telescopic steering column, including a plurality of mutually independent dynamic dampers, each including a mass member and a spring member for elastically supporting the mass member to the steering column or wheel. At least two of natural frequencies of the plurality of dynamic dampers are tuned to a higher and a lower frequency range in relation to a central value of a range of variation in a natural frequency of the steering wheel due to an expansion or contraction of the telescopic steering column, within the range of vibration in the natural frequency of the steering wheel. Further, a difference between adjacent ones of the natural frequencies of the plurality of dynamic dampers is made held within 10-40% of the central value of the range of vibration in the natural frequency of the steering wheel.
    Type: Grant
    Filed: July 26, 2002
    Date of Patent: August 24, 2004
    Assignee: Tokai Rubber Industries, Ltd.
    Inventors: Takahiro Aoi, Masaaki Hamada, Hideki Oshima, Rentaro Kato
  • Publication number: 20040060789
    Abstract: A connector assembly or connecting device for elastically connecting a steering wheel of a vehicle to a rotary member supported by a stationary member fixed to the vehicle body such that the rotary member is rotatable upon rotation of the steering wheel to steer the vehicle, the connector assembly including a first member to be fixed to the rotary member for rotation with the rotary member, a second member to be fixed to the steering wheel for rotation with the steering wheel, an elastic body interposed between the first and second members to elastically connecting the first and second members, and a relative-rotation restrictor located between the first and second members, for restricting an amount of elastic deformation of the elastic body upon rotation of the second member relative to the first member, to restrict a maximum angle of relative rotation of the first and second members permitted by the elastic deformation of the elastic body, for thereby restricting a maximum angle of rotation of the steering
    Type: Application
    Filed: September 15, 2003
    Publication date: April 1, 2004
    Applicant: Tokai Rubber Industries, Ltd.
    Inventor: Masaaki Hamada
  • Patent number: 6672574
    Abstract: Disclosed is a fluid-filled cylindrical vibration damping device including an elastic body interposed between an inner and outer sleeves for elastically connecting these sleeves with each other. A plurality of fluid chambers filled with a non-compressible fluid are partially defined by the elastic body so that a pressure of the fluid in the plurality of fluid chambers vary upon application of a vibrational load to the vibration damping device. A first orifice passage permitting a fluid communication between the fluid chambers is at least partially defined by an elastic member adapted to be subjected to shear deformation due to a fluid pressure acting on the first orifice passage so that a cross sectional area of the first orifice passage increases according to an increase of the pressure of the fluid acting on the first orifice passage owing to the shear deformation of the elastic member.
    Type: Grant
    Filed: October 16, 2002
    Date of Patent: January 6, 2004
    Assignee: Tokai Rubber Industries, Ltd.
    Inventors: Masaaki Hamada, Tatsuya Suzuki