Patents Assigned to Teijin Seiki Company, Limited
  • Patent number: 6269711
    Abstract: In a flexible type transmission device, an angular ball bearing is interposed between an output member and a fixed case so as to support the output member and the fixed case while permitting relative rotation between the output member and the fixed case. The loads acting on the output member and fixed case are received using the rolling contact of steel balls included in the angular ball bearing.
    Type: Grant
    Filed: August 11, 1999
    Date of Patent: August 7, 2001
    Assignee: Teijin Seiki Company Limited
    Inventor: Kenji Tejima
  • Patent number: 6220107
    Abstract: Since the phases of pinions 23, 25 and a pinion 24 are deviated by 180 degree, the pinions 23, 25 are acted with the engaging force which is reverse in a working direction to the engaging force of the pinion 24 and is half in the value. At this time since distances between a center 27a in the gear width of the pinion 24 and centers 26a, 28a in the gear width of the pinions 23, 25 are substantially equal, the engaging forces in the pinions 24 and 23, 25 are zero in resultant force and moment of rotation, and balanced.
    Type: Grant
    Filed: October 21, 1999
    Date of Patent: April 24, 2001
    Assignee: Teijin Seiki Company, Limited
    Inventor: Hongyou Wang
  • Patent number: 5992148
    Abstract: If a first control valve 71 is arranged so as to change between a flow position A and a throttling position C by a fluid for switching purpose guided through a pilot channel 77, the flow area of a first intermediate channel can be changed in two steps. As a result, the injection-valve opening pressure and time of a first relief valve 48 change between two types of values, whereby the physical shock occurring when a crawler vehicle stops can be switched between two types of shock.
    Type: Grant
    Filed: January 27, 1998
    Date of Patent: November 30, 1999
    Assignee: Teijin Seiki Company Limited
    Inventor: Teruhiko Satake
  • Patent number: 5341977
    Abstract: A yarn drawing-in nozzle for drawing a yarn through an eye of a drawn-through member, comprising: a compression nozzle provided in an upstream side of the drawn-through member and having a block, the block being formed with a guide passage to which compressed air is supplied and into which the yarn with its distal end portion is inserted and through which the yarn is drawn through the eye of the drawn-through member with the aid of the compressed air; the guide passage of the compression nozzle being defined by an axially elongated groove having an upper open end and a bottom surface along a yarn drawing-in direction so that the compressed air is supplied through the bottom surface to the guide passage and that the distal end portion is drawn toward the bottom surface through the upper open end and that the yarn is drawn through the eye of the drawn-through member from a distal end of the yarn along the bottom surface.
    Type: Grant
    Filed: February 8, 1993
    Date of Patent: August 30, 1994
    Assignee: Teijin Seiki Company Limited
    Inventor: Yoshihide Nishimura
  • Patent number: 5113756
    Abstract: A press machine comprising: a slider which reciprocates between its top dead point position and bottom dead point position; a stationary bolster; a position adjusting mechanism for adjusting an up-and-down relative position between the slider and the bolster; a bottom dead point position detecting mechanism for detecting a position of the slider held in the bottom dead point position; a moving body on which the bottom dead point position detecting mechanism is supported and which is movable in the directions in which the slider reciprocates; and a follow-up mechanism connected to the position adjusting mechanism so that the moving body can follow up a position adjustment movement of the slider, the bottom dead point position detecting mechanism being moved so that it can follow up the position adjustment movement of the slider.
    Type: Grant
    Filed: August 30, 1990
    Date of Patent: May 19, 1992
    Assignee: Teijin Seiki Company, Limited
    Inventor: Yutaka Fujii
  • Patent number: 5079811
    Abstract: A feed method of feeding a thread wound on a bobbin to a thread drawing-in apparatus through first and second suction nozzles, comprising the steps of: advancing the thread to a first position between the bobbin and the first suction nozzle, along an axis; gripping the advanced thread at the first position and then drawing the thread at the first position in a predetermined direction substantially perpendicular to the axis of a first predetermined length; gripping the drawn thread at a second position between the bobbin and the first position and also releasing the drawn thread at the first position, and then feeding the drawn thread to the thread drawing-in apparatus; gripping the fede thread at a third position between the second suction nozzle and the thread drawing-in apparatus and also releasing the thread at the first and second positions, and then drawing the thread at the third position in the predetermined direction by a second predetermined length; and cutting the thread that has been drawn by the s
    Type: Grant
    Filed: March 28, 1990
    Date of Patent: January 14, 1992
    Assignee: Teijin Seiki Company Limited
    Inventors: Juro Tachibana, Yoshihide Nishimura
  • Patent number: 5079492
    Abstract: A stability compensating circuit of a servomechanism wherein the output displacement of an actuator is controlled, comprising: a unit generating a reference input signal corresponding to a target value; a first adder which is provided in a first line between the reference input signal generating unit and the actuator and to which a feedback signal from the actuator is inputted through a second line between the first adder and the actuator; a second adder provided in the first line between the first adder and the actuator; a first compensating circuit provided in the first line between the first and second adders; and a second compensating circuit provided in a third line between the second adder and the actuator, the feedback signal from the actuator being inputted to the second adder through the second compensating circuit.
    Type: Grant
    Filed: May 31, 1990
    Date of Patent: January 7, 1992
    Assignee: Teijin Seiki Company Limited
    Inventor: Shigeyuki Takagi
  • Patent number: 5050484
    Abstract: A hydraulic actuator comprising a cylinder formed with an axial cylinder chamber, a main piston provided in the cylinder chamber and dividing the chamber into a first chamber and a second chamber and further formed with a locking chamber, an annular locking groove formed in the cylinder, a locking member cooperating with the annular locking groove to lock the main piston in a predetermined position, the locking member movable between an unlocking position and a locking position, a locking-unlocking piston for moving the locking member into the locking and unlocking positions, and a pressure introducing passageway for selecting the first or second chamber that is higher in pressure and introducing the higher pressure in the selected chamber into the locking chamber of the main piston. The locking-unlocking piston is moved by the pressure introduced by the pressure introducing passageway to move the locking member into the locking and unlocking positions.
    Type: Grant
    Filed: April 25, 1990
    Date of Patent: September 24, 1991
    Assignee: Teijin Seiki Company Limited
    Inventor: Toshio Kamimura
  • Patent number: 5050849
    Abstract: A hydraulic vibration buffer for connection between two members with a case coupled with the first member, a piston rod with its top end coupled with a second member, a piston coupled with a base end of the piston rod and housed within the cylinder case so as to divide the cylinder case into first and second chambers, fluid source, a tank, and a control valve disposed in fluid paths connecting the cylinder case, the fluid source, and the tank with one another. The vibration buffer also includes returning-force application device constituted by a swingable link with its one and other ends coupled with the first member and the housing block through which the fluid paths extend, and a pair of springs disposed between a center portion of the swingable link and the spool of the control valve.
    Type: Grant
    Filed: June 12, 1990
    Date of Patent: September 24, 1991
    Assignee: Teijin Seiki Company Limited
    Inventor: Shigeyuki Takagi
  • Patent number: 5025199
    Abstract: A servo control apparatus comprising: a unit for generating a required position value; an actuator adapted to drive a load and having its maximum displacement in one direction and its minimum displacement in the other direction; a drive unit for driving the actuator; a position detecting unit for detecting a displacement of the actuator; and a control unit for correcting the required position value on basis of the maximum and minimum displacements of the actuator and for computing a deviation between an output of the position detecting unit and the corrected required position value; the load being controlled by the deviation.
    Type: Grant
    Filed: August 14, 1989
    Date of Patent: June 18, 1991
    Assignee: Teijin Seiki Company Limited
    Inventor: Hidenobu Ako
  • Patent number: 5007327
    Abstract: A hydraulic servo actuator adapted to control a driven member in accordance with an operation of a servo circuit through which servo oil flows comprises a main cylinder and an associated piston, associated piston being reciprocable within the cylinder and the main cylinder divided by the piston into a first chamber and a second chamber which are adapted to be in fluid communication with the servo oil, a damper means provided within the main piston for dampening reciprocating movement of the main piston. A hydraulic servo actuator also includes a throttle means for imparting a predetermined restriction to the servo oil that flows between the second chamber and the damper means along the predetermined passage formed within the cylinder.
    Type: Grant
    Filed: September 8, 1989
    Date of Patent: April 16, 1991
    Assignee: Teijin Seiki Company Limited
    Inventors: Toshio Kamimura, Shigeyuki Takagi
  • Patent number: 4967124
    Abstract: In a servo control apparatus wherein a load is controlled by a deviation between a command signal corresponding to a target value and a detected position signal of an actuator of a servo system and which has a plurality of the servo systems arranged in parallel with respect to the load, the servo control apparatus comprising: a forward circuit for producing a signal that changes in response to an external force exerted on the actuator; first feedback circuit for detecting the signal of the forward circuit and feeding the same back to the command signal; and second feedback circuit for feeding the detected position signal of the actuator back to the command signal, producing a deviation signal representative of a deviation between the position signal and the command signal, integrating the deviation signal, and inputting the integrated signal to the forward circuit.
    Type: Grant
    Filed: July 5, 1989
    Date of Patent: October 30, 1990
    Assignee: Teijin Seiki Company Limited
    Inventor: Masanori Hirai
  • Patent number: 4936196
    Abstract: A neutral position resetting device for a servo actuator is described, having reset means that is actuated when the control of the servo actuator by actuator valve means becomes inoperative. The reset means ordinarily separated from a spool of the actuator valve means resets the servo actuator to a neutral position by applying a driving force and forcibly moving the spool.
    Type: Grant
    Filed: November 25, 1988
    Date of Patent: June 26, 1990
    Assignee: Teijin Seiki Company Limited
    Inventors: Toshio Kamimura, Koji Ito
  • Patent number: 4937512
    Abstract: A stability compensating circuit of a servomechanism wherein the output displacement of an actuator is controlled, comprising: a signal source generating a reference input signal corresponding to a target value; a first summing amplifier to which the reference input signal and a signal corresponding to the actual output displacement of the actuator are inputted; a primary amplifier to which an output of the first summing amplifier is inputted and which amplifies the output of the first summing amplifier; a secondary amplifier to which an output of the primary amplifier is inputted and which further amplifies the output; a second summing amplifier to which an output of the amplifier is inputted.
    Type: Grant
    Filed: March 17, 1989
    Date of Patent: June 26, 1990
    Assignee: Teijin Seiki Company Limited
    Inventor: Shigeyuki Takagi
  • Patent number: 4931635
    Abstract: An optical position sensor of aircraft comprises light emitting means, first optical wave guiding means connected at its one end to the light emitting means, and polarizing means connected at its one end directly to the other end of the first optical wave guiding means. A Faraday effect element is connected at its one end directly to the other end of the polarizing means and has reflecting means at its other end. A movable magnetic scale is disposed in opposed relationship to the reflecting means and having a plurality of magnetized segments mounted thereon. The sensor further comprises polarization detecting means connected at its one end directly to the other end of the Faraday effect element, second optical wave guiding means connected at its one end directly to the other end of the polarization detecting means and adapted for guiding the light from the polarization detecting means, and optoelectric converting means connected to the other end of the second optical wave guiding means.
    Type: Grant
    Filed: November 15, 1988
    Date of Patent: June 5, 1990
    Assignee: Teijin Seiki Company Limited
    Inventor: Kiyoshi Toyama
  • Patent number: 4931634
    Abstract: An optical position sensor of aircraft comprises light emitting means, an optical block, and a movable magnetic scale disposed in opposed relationship to the optical block. The sensor further comprises first optical wave guiding means connected at its one end to the light emitting means, polarizing means connected at its one end directly to the other end of the first optical wave guiding means and connected at its other end directly to one end of the optical block, and polarization detecting means connected at its one end directly to the other end of the optical block. The sensor further comprises second optical wave guiding means connected at its one end directly to the other end of the polarization detecting means, and opto-electric converting means connected to the other end of the second optical guiding means.
    Type: Grant
    Filed: November 21, 1988
    Date of Patent: June 5, 1990
    Assignee: Teijin Seiki Company Limited
    Inventor: Kiyoshi Toyama
  • Patent number: 4916785
    Abstract: A heddle magazine comprising a pair of first magazine bars having carried thereon a plurality of heddles which form a first heddle group; a pair of second magazine bars disposed in parallel relationship to the first magazine bars and having carried thereon a plurality of heddles which form a second heddle group; a stationary magazine support having the first and second magazine bars stationarily mounted thereon; and means for removing the heddle one by one selectively from the first and second heddle groups and positioning the removed heddle into a predetermined position.
    Type: Grant
    Filed: July 5, 1988
    Date of Patent: April 17, 1990
    Assignee: Teijin Seiki Company Limited
    Inventors: Juro Tachibana, Yoshihide Nishimura
  • Patent number: 4916784
    Abstract: A warp-drawing apparatus for drawing a warp thread through an eye of a heddle, comprising a compression nozzle which is provided in one side of the heddle and formed with a compression passageway through which the warp thread is drawn and formed with a nozzle passageway through which compression air is injected, a suction nozzle which is provided in the other side of the heddle and formed with a suction passageway through which the warp thread is drawn and formed with a nozzle passageway through which compression air is injected, and suction means for drawing air from an exit of the suction passageway of the suction nozzle in a direction in which the warp thread is drawn through the eye of the heddle.
    Type: Grant
    Filed: June 8, 1988
    Date of Patent: April 17, 1990
    Assignee: Teijin Seiki Company Limited
    Inventors: Juro Tachibana, Yoshihide Nishimura
  • Patent number: 4905794
    Abstract: A lubricating device of a turret type change-over device wherein a plurality of rotating bodies are mounted on a rotatable turret table, comprising: a plurality of bearings adapted to rotate the rotating bodies with respect to the rotatable turret table; a lubricating oil chamber provided in the vicinity of the bearings; and a lubricating oil tank provided within the lubricating oil chamber, the oil tank being rotated in accordance with the rotation of the turret table to retain a lubricating oil therein and supply the same to the bearings.
    Type: Grant
    Filed: January 12, 1989
    Date of Patent: March 6, 1990
    Assignee: Teijin Seiki Company Limited
    Inventors: Takami Sugioka, Toshihiro Yudate
  • Patent number: 4905933
    Abstract: A control apparatus of a control surface of aircraft comprising a plurality of servomechanisms each including a hydraulic working oil source for supplying working oil under pressure, an actuator for driving the control surface, a servo valve for controlling the control surface, a switch valve interposed between the hydraulic working oil source and the servo valve, a bypass valve interposed between the servo valve and the actuator, a control valve connected to the bypass valve, actuator-displacement detecting means connected to the actuator to detect a drive displacement of the actuator and to output a displacement signal, and a control circuit for outputting actuating signals to the switch valve and servo valve, respectively, to drive the actuator, and for outputting a control signal to the control valve in response to the displacement signal in order to stop the actuator at a predetermined position.
    Type: Grant
    Filed: April 28, 1988
    Date of Patent: March 6, 1990
    Assignee: Teijin Seiki Company Limited
    Inventor: Hidenobu Ako