Patents by Inventor Terumitsu Sugita

Terumitsu Sugita 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: 4867658
    Abstract: A rotary vane compressor has a cylinder having an oval-shaped compartment in which is rotatably mounted a rotor. Front and rear side blocks close the opposite ends of the cylinder. A plurality of vanes are slidably mounted in slots formed around the rotor and divide the cylinder compartment into expansible working chambers. A gas inlet opening is disposed at the upstream end of each working chamber for admitting a gas to be compressed and a gas outlet opening is disposed at the downstream end of each working chamber for discharging the compressed gas. A source of pressurized lubricant oil is fed to the base of the vane slots to bias the vanes outwardly so that the vane tips slidably engage the inner wall of the cylinder compartment during rotation of the rotor.
    Type: Grant
    Filed: December 7, 1982
    Date of Patent: September 19, 1989
    Assignee: Seiko Seiki Kabushiki Kaisha
    Inventors: Terumitsu Sugita, Koji Urushibara
  • Patent number: 4708598
    Abstract: A rotary vane-type gas compressor for use in car coolers and the like has a plurality of intake ports for each compression working chamber located at positions shifted from one another in the revolving direction of a rotor. At least one intake port which is located at the most forward position in the revolving direction of the rotor has a throttle valve which is controlled in response to the flow rate of suctioned gas, and the opening degree of the throttle valve is changed as the revolution speed of the rotor increases and creates a higher flow rate of suctioned gas. This reduces the effective compression working chamber volume, i.e., the volume which results when one vane has passed the position of the corresponding intake port to enclose gas in the compression working chamber. By such a construction, it is possible to restrain a substantial increase in both the amount of compressed gas to be discharged and the air-cooling capacity, even when the revolution speed of the rotor increases above 2000 rpm.
    Type: Grant
    Filed: July 13, 1984
    Date of Patent: November 24, 1987
    Assignees: Seiko Seiki Kabushiki Kaisha, Nihon Radiator Co., Ltd.
    Inventors: Terumitsu Sugita, Hideo Shinozuka, Koji Murayama
  • Patent number: 4471862
    Abstract: An air compressor has a front side block through which extends a rotor shaft, and a front head is attached to the front side block and has a cylindrical portion spaced from the rotor shaft. A sealing device is interposed between the inner periphery of the cylindrical portion and the rotor shaft. A pulley is rotatably mounted on the outer periphery of the cylindrical portion by means of a ball bearing assembly. A ring-shaped interference plate is attached to the inner periphery of the pulley front end and the plate projects inwardly in axially-spaced relation from the ball bearing assembly to define a collection space along the inner periphery of the pulley front end in the region between the ball bearing assembly and the plate for collecting oil which leaks from the air compressor.
    Type: Grant
    Filed: April 29, 1982
    Date of Patent: September 18, 1984
    Assignee: Seiko Seiki Kabushiki Kaisha
    Inventor: Terumitsu Sugita
  • Patent number: 4118900
    Abstract: In a grinding machine, either the revolutional speed of the workpiece or of the grinding wheel is controlled and further the infeed speed of the wheel to the workpiece is controlled so that the optimum grinding condition, having a suitable ratio of the workpiece surface speed to the grinding wheel surface speed and a suitable ratio of the infeed speed to the workpiece revolutional speed, is obtained. The former ratio is maintained despite the wheel diameter decrease caused by wheel dressings.
    Type: Grant
    Filed: March 22, 1977
    Date of Patent: October 10, 1978
    Assignee: Seiko Seiki Kabushiki Kaisha
    Inventors: Sadao Moritomo, Youji Tatsumi, Terumitsu Sugita
  • Patent number: 4117634
    Abstract: During rough grinding operation of a grinding machine, metal removal rate of the workpiece is detected for shifting the changing point from the rough grinding to fine grinding, and, with larger metal removal rate, the changing point is shifted earlier and vice versa with smaller rate to thereby keep approximately constant fine grinding stock removal to ensure minimum cycle time necessary for grinding work even if the grinding ability of the grinding machine is changed.
    Type: Grant
    Filed: January 31, 1977
    Date of Patent: October 3, 1978
    Assignee: Seiko Seiki Kabushiki Kaisha
    Inventors: Terumitsu Sugita, Yasuo Tateishi
  • Patent number: 4095377
    Abstract: An inprocess size measuring device has at least two feelers which respectively detect inner surface positions of an annular workpiece rotatably supported at the outer periphery thereof by a pair of shoes. The outputs from the feelers of the size measuring device are received to be converted by an operation means both into the inner diameter and into the center error of the workpiece. For this error the infeed of the infeed table is compensated.
    Type: Grant
    Filed: January 31, 1977
    Date of Patent: June 20, 1978
    Assignee: Seiko Seiki Kabushiki Kaisha
    Inventor: Terumitsu Sugita
  • Patent number: 4085554
    Abstract: A method of dressing a grinding wheel in which a dressing tool repeatedly traverses across the grinding wheel for successively dressing it. A force developed between the dressing tool and the grinding wheel during each traverse of the dressing tool across the grinding wheel is measured, and the measured forces are used to determine when the grinding wheel has been sufficiently dressed. This determination is made by computing the difference between the values of successive forces measured during successive traverses of the dressing tool across the grinding wheel. Alternatively, the determination is made by computing the differential rate of change of the successive forces developed between the dressing tool and the grinding wheel. In either case, traversing of the dressing tool across the grinding wheel is terminated when the computed value is less than a certain predetermined value.
    Type: Grant
    Filed: November 9, 1976
    Date of Patent: April 25, 1978
    Assignee: Seiko-Seiki Kabushiki Kaisha
    Inventor: Terumitsu Sugita