Patents by Inventor Katsushi Tanaka

Katsushi Tanaka 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: 20190346005
    Abstract: A suspension includes: a cylinder; a piston rod including a piston provided at one end-side, and inserted in the cylinder together with the piston; an outer tube part opened at the one end-side, a position of which relative to the piston rod is fixed at the other end-side, and configured to receive therein at least a part of the cylinder; and a tubular rolling diaphragm having one end disposed at the cylinder and the other end fixed to the outer tube part, and configured to roll in conjunction with displacement of the piston rod with respect to the cylinder. The rolling diaphragm becomes convex toward the other end-side of the outer tube part and is accommodated in the outer tube part, upon contraction of the suspension.
    Type: Application
    Filed: July 24, 2019
    Publication date: November 14, 2019
    Applicant: Showa Corporation
    Inventors: Katsushi TANAKA, Kojiro YOSHIDA
  • Patent number: 7658246
    Abstract: An assist device 11 is equipped with a spring means 21 (gas spring), and a piston 24 in a cylinder 23 moves upward or downward according to a relative displacement motion (flexing or stretching motion) of a thigh 4 and a crus 5 at a knee joint 8 of a leg 3 of a robot. Air chambers 25 and 26 above and below the piston 24 are filled with gases. If a flexing degree at the knee joint 8 is a predetermined value or less, then the air chambers 25 and 26 are brought into communication through a groove 28 in the cylinder 23, and the spring means 21 does not generate an elastic force, but if the flexing degree exceeds the predetermined value, then the air chambers 25 and 26 are hermetically sealed from each other and the spring means 21 produces an elastic force, the elastic force acting on the knee joint 8 as assisting driving force. A burden on a joint actuator of a leg can be reduced, while reducing energy consumption of the robot by using a small and simple construction.
    Type: Grant
    Filed: August 17, 2005
    Date of Patent: February 9, 2010
    Assignees: Honda Motor Co., Ltd., Showa Corporation
    Inventors: Toru Takenaka, Hiroshi Gomi, Kazushi Hamaya, Kazushi Akimoto, Shinya Shirokura, Minami Asatani, Katsushi Tanaka
  • Publication number: 20080210477
    Abstract: An assist device 11 is equipped with a spring means 21 (gas spring), and a piston 24 in a cylinder 23 moves upward or downward according to a relative displacement motion (flexing or stretching motion) of a thigh 4 and a crus 5 at a knee joint 8 of a leg 3 of a robot. Air chambers 25 and 26 above and below the piston 24 are filled with gases. If a flexing degree at the knee joint 8 is a predetermined value or less, then the air chambers 25 and 26 are brought into communication through a groove 28 in the cylinder 23, and the spring means 21 does not generate an elastic force, but if the flexing degree exceeds the predetermined value, then the air chambers 25 and 26 are hermetically sealed from each other and the spring means 21 produces an elastic force, the elastic force acting on the knee joint 8 as assisting driving force. A burden on a joint actuator of a leg can be reduced, while reducing energy consumption of the robot by using a small and simple construction.
    Type: Application
    Filed: August 17, 2005
    Publication date: September 4, 2008
    Applicants: HONDA MOTOR CO., LTD., SHOWA CORPORATION
    Inventors: Toru Takenaka, Hiroshi Gomi, Kazushi Hamaya, Kazushi Akimoto, Shinya Shirokura, Minami Asatani, Katsushi Tanaka
  • Publication number: 20070210739
    Abstract: In a state wherein a solenoid switching valve in a gas passage in communication with air chambers is closed, an assist device produces an assisting driving force by compression or expansion of a gas as a knee joint (specific joint) of a leg bends or stretches, and applies the produced assisting driving force to the knee joint. In a valve-open state of the solenoid switching valve, no assisting driving force is produced. The solenoid switching valve is constructed of a solenoid switching valve having a self-holding feature, and installed in the gas passage such that a pressure difference between air chambers acts in a valve closing direction of a valve element in a predetermined period during which the solenoid switching valve is closed. This arrangement effectively reduces the power consumption of the solenoid switching valve by a simple construction.
    Type: Application
    Filed: August 5, 2005
    Publication date: September 13, 2007
    Applicants: HONDA MOTOR CO., LTD., SHOWA CORPORATION
    Inventors: Toru Takenaka, Hiroshi Gomi, Kazushi Hamaya, Kazushi Akimoto, Katsushi Tanaka
  • Patent number: 7241239
    Abstract: In an auto tensioner, a high pressure oil chamber sectioned by a leading end portion of a cylinder and a plunger is provided within the cylinder. A gas chamber and an oil reservoir chamber are sectioned in a sealed manner in an outer periphery of the cylinder and the plunger. A first oil passage communicating the gas chamber with the high pressure oil chamber is provided within the plunger. A second oil passage communicating the high pressure oil chamber with the oil reservoir chamber is provided in the cylinder. The first oil passage is provided with a pressure side damping force generating means, (an orifice hole) and a first check valve closing during expansion. A second check valve closing during compression is provided in the second oil passage, and a locking means (an electromagnetic valve) closing the first check valve is provided.
    Type: Grant
    Filed: March 18, 2004
    Date of Patent: July 10, 2007
    Assignee: Showa Corporation
    Inventor: Katsushi Tanaka
  • Publication number: 20070000743
    Abstract: A damping force adjustable hydraulic shock absorber is provided with a first passage connected to a rod side chamber, a second passage connected to a piston side chamber, a main passage combining the first passage and the second passage so as to communicate with a reservoir, a first check valve allowing only an oil flow to the main passage from the rod side chamber via the first passage, and a second check valve allowing only an oil flow to the main passage from the piston side chamber via the second passage, and a proportional solenoid type relief valve provided in the main passage, and adjusting a damping force by controlling a relief pressure of the oil flow to the reservoir from the rod side chamber or a relief pressure of the oil flow to the reservoir from the piston side chamber.
    Type: Application
    Filed: December 13, 2005
    Publication date: January 4, 2007
    Applicant: Showa Corporation
    Inventors: Tutomu Naitou, Katsushi Tanaka, Kazunari Maeda
  • Patent number: 7094168
    Abstract: In a belt tensioner, a cylinder is mounted to a side of a stationary member positioned in an upper side. A plunger is mounted to a side of a pulley positioned in a lower side. An outer tube sectioning an oil reservoir forming a gas chamber in an upper portion is provided in an outer periphery of the plunger and the cylinder. A first oil passage communicating the gas chamber with a high pressure oil chamber is provided in an upper portion of the cylinder. A second oil passage communicating the high pressure oil chamber with the oil reservoir is provided in the plunger. An orifice hole is provided in the first oil passage. A first check valve closing at an expansion time is provided in the first oil passage, and a second check valve closing at a compression time is provided in the second oil passage.
    Type: Grant
    Filed: May 30, 2003
    Date of Patent: August 22, 2006
    Assignee: Showa Corporation
    Inventor: Katsushi Tanaka
  • Publication number: 20050064970
    Abstract: In an auto tensioner, a high pressure oil chamber sectioned by a leading end portion of a cylinder and a plunger is provided within the cylinder. A gas chamber and an oil reservoir chamber are sectioned in a sealed manner in an outer periphery of the cylinder and the plunger. A first oil passage communicating the gas chamber with the high pressure oil chamber is provided within the plunger. A second oil passage communicating the high pressure oil chamber with the oil reservoir chamber is provided in the cylinder. The first oil passage is provided with a pressure side damping force generating means, (an orifice hole) and a first check valve closing during expansion. A second check valve closing during compression is provided in the second oil passage, and a locking means (an electromagnetic valve) closing the first check valve is provided.
    Type: Application
    Filed: March 18, 2004
    Publication date: March 24, 2005
    Inventor: Katsushi Tanaka
  • Publication number: 20040087398
    Abstract: In a belt tensioner, a cylinder is mounted to a side of a stationary member positioned in an upper side. A plunger is mounted to a side of a pulley positioned in a lower side. An outer tube sectioning an oil reservoir forming a gas chamber in an upper portion is provided in an outer periphery of the plunger and the cylinder. A first oil passage communicating the gas chamber with a high pressure oil chamber is provided in an upper portion of the cylinder. A second oil passage communicating the high pressure oil chamber with the oil reservoir is provided in the plunger. An orifice hole is provided in the first oil passage. A first check valve closing at an expansion time is provided in the first oil passage, and a second check valve closing at a compression time is provided in the second oil passage.
    Type: Application
    Filed: May 30, 2003
    Publication date: May 6, 2004
    Inventor: Katsushi Tanaka
  • Patent number: 5867952
    Abstract: An aseismic support structure which includes a fixed part which is attached to a stationary floor, an equipment connection part for holding part of the equipment and a moving part coupled to the fixed part and the equipment connection part and wherein the moving part is freely movable relative to the fixed part in any direction parallel with the stationary floor and the equipment connection part is freely rotatable about the moving part. The equipment can have a caster which is held by the equipment connection part. For a weak earthquake shock, a caster lock portion of the equipment connection part locks the caster of the equipment to prevent the movement of the equipment. For a stronger earthquake, resonance is prevented by the moving part moving in a direction parallel with the stationary floor, and for a ruinous earthquake the vibration of the moving part is absorbed by a shock absorbing member attached to the fixed part.
    Type: Grant
    Filed: August 16, 1996
    Date of Patent: February 9, 1999
    Assignee: International Business Machines Corporation
    Inventors: Junji Takayoshi, Katsushi Tanaka, Takeshi Tsukamoto
  • Patent number: 5813650
    Abstract: Disclosed is an aseismic support structure having one end secured to a fixed floor and another end connected to a subject structure placed on a floating floor. The aseismic support structure includes a toggle bar, an attachment section and a mounting section. The toggle bar has a universal joint at each end and is adjustable in its length to have a predetermined length. The universal joints are rotatable around axes in the horizontal and vertical directions, respectively. The attachment section is connected to the toggle bar through one of the universal joints, and has at another end a third universal joint comprising a vertical rotation section. A cantilever extends substantially parallel to the fixed floor, is connected to the attachment section by the third universal joint at one end and has a fourth universal joint at another end. The mounting section is connected to the cantilever by the fourth universal joint and secures the equipment.
    Type: Grant
    Filed: October 2, 1996
    Date of Patent: September 29, 1998
    Assignee: International Business Machines Corporation
    Inventors: Takeshi Tsukamoto, Hiroshi Suzuki, Akira Suzuki, Katsushi Tanaka
  • Patent number: 4519768
    Abstract: An apparatus for horizontally casting concrete comprises a horizontally foldable multilink support arm composed of an attachment frame, a proximal boom, intermediate booms, and a distal boom which are pivotally coupled by joint tubes, a drive mechanism composed of worm wheels mounted on the joint tubes and worm gears mounted on the booms and held in mesh with the worm wheels for enabling the support arm to move in articulatory motion, a concrete pressure-feed pipe extending from a pump along the booms and through the joint tubes with swivel joints, and an attachment jig mounted on the attachment frame for being mounted on a column.
    Type: Grant
    Filed: October 27, 1983
    Date of Patent: May 28, 1985
    Assignees: Takenaka Komuten Co., Ltd., Kyokuto Kaihatsu Kogyo CO., Ltd.
    Inventors: Toshio Murai, Hayao Aoyagi, Masahiko Furukawa, Hiromichi Yamada, Tateo Kawamura, Yoshihiro Ishikawa, Akio Sakamoto, Toshiaki Tsuchiya, Takashi Shiozaki, Hirokuni Kubota, Isoji Okada, Jiro Ishii, Fumio Fujii, Masakazu Nagao, Masamitsu Kikuchi, Morio Ishii, Yoshimasa Sasaki, Katsushi Tanaka, Tadashi Itakura
  • Patent number: 4293227
    Abstract: The present invention relates to a spraying unit for unhardened concrete and the like, which is provided with an apparatus capable of mixing a constant quantity of quick-set additive, for example, into unhardened concrete to be sprayed.The apparatus capable of mixing the constant quantity of quick-set additive into unhardened concrete and the like is adapted to usually carry and supply the constant volumetric weight and quantity of quick-set additive outside a quick-set additive container regardless of the amount of the quick-set additive stored inside the container.
    Type: Grant
    Filed: September 11, 1979
    Date of Patent: October 6, 1981
    Assignee: Kyokuto Kaihatsu Kogyo Co., Ltd.
    Inventors: Katsushi Tanaka, Taro Okamoto