Assignee: Thk Co., Ltd.

Location: Tokyo, JP
No. of patents: 69

Number	Title	Issue Date
8167493	Ball spline a ball spline enabling easy machining of a spline shaft by drawing and manufacturable at low cost. The ball spline includes a spline shaft in which multiple lines of ball rolling faces are formed along the longitudinal direction; and a spline nut having a hollow hol...	05/01/2012
8166838	Actuator for driving movable object and motion guide apparatus for guiding motion of movable object An actuator has a hollow track rail 6 having a slit 8 extending in an axial direction thereof, a movable block 7 disposed inside the track rail 6 to be movable along the track rail, and a ball screw mechanism for moving the movable block ...	05/01/2012
8146453	Motion guide device A motion guide device is provided which comprises a chain of rollers in which retainers are interposed, in which the chain of rollers is given a degree of freedom of rotation. The motion guide device comprises a track member (5) on which a roller rolling part...	04/03/2012
8143750	Linear motor having coils surrounding an axially moving magnetic rod A compact linear motor is provided which is able to limit a rod, which linearly moves relatively to coils, from revolving. The linear motor comprises a rod (11) equipped with magnets (13), coils (4) surrounding the rod (11), and a ...	03/27/2012
8141499	Wireless actuator A wireless actuator includes a track rail, a slide member movable along the track rail, a driver which is mounted on the slide member and which allows the slide member to travel with respect to the track rail, a radio receiver portion which is mounted on the slide m...	03/27/2012
8132479	Screw device and method of manufacturing the same Provided is a screw device capable of preventing occurrence of any elevation change at a joint between a ball return path of a circulation member and a loaded ball rolling groove of a nut. The circulation member 12 has end parts 14 and 15...	03/13/2012
8132477	Ball screw device A ball screw device having a novel ball circulation structure suitable for a screw shaft with a large lead, optimum for downsizing and weight saving of a nut member, capable of being manufactured at low cost, and capable of exhibiting high reliability even under sev...	03/13/2012
8129928	Power branching system and power branching method Provided is a power branching system for driving a plurality of motors by use of a single servo driver, the power branching system capable of protecting each of the motors. The power branching system of the present invention has power lines 15 branched...	03/06/2012
8123407	Ball spline device Provided is a ball spline device, in which an outer diameter of a nut member can be downsized to the maximum while sufficiently performing an original function, and which can keep reliability while being capable of being simply manufactured at lower cost without inv...	02/28/2012
8106545	Linear actuator unit Provided is a linear actuator unit that includes: a guide shaft formed of a magnetic body that is formed into a tubular shape while having a hollow portion therein, and has one linear opening portion formed thereon along an axial direction thereof; a slide member ca...	01/31/2012
8097986	Micro actuator Disclosed is a micro actuator capable of being formed in compact as a whole, such as 10 mm in diameter by diminishing a difference between a stroke distance of a moving member and an overall length, and by reducing a sectional area taken in a direction orthogonal to...	01/17/2012
8092402	Power assist control method, power assist control apparatus, and reduction apparatus Power assist control capable of responding to feeling and sensibility when a man applies force to an object is performed. The power assist control outputs an assist force F or a speed F on the basis of an assist target force X detected by a force sensor 114 f...	01/10/2012
8076890	AC motor driving apparatus and control method Provided is an AC motor driving apparatus and an AC motor control method capable of utilizing the conventional PWM system as-is even in an ultra-compact AC motor having an extremely few turns of exciting coil and preventing occurring of vibration and noise. The AC m...	12/13/2011
8070360	Motion guide device and method of lubricating the same A motion guide device is provided, which is able to not only lubricate rolling-element rolling surfaces with the use of a technique totally different from conventional lubricating techniques but also maintain a lubricating capability over a long period of time. The ...	12/06/2011
8067862	Linear motor actuator Provided is a linear motor actuator which generates a sufficient thrust force and a retaining force and is remarkably smaller than conventional linear motor actuators. The linear motor actuator includes a base member (1) provided with a bottom plate (10	11/29/2011
8051729	Screw device and method of manufacturing the same The present invention provides a screw device which takes a heavy load in one direction along the axis of the screw shaft and only a light load in the opposite direction, the screw device capable of providing ease of control of preloading. The screw device of...	11/08/2011
8047095	XY table actuator Provided is an XY table actuator that, while building-in a drive means for freely moving an object placed on a table within an XY-plane and positioning the object, can be significantly reduced in size and that helps to suppress an increase in table height. The actua...	11/01/2011
8044615	Method for controlling AC linear motors, device for driving AC linear motors, and system of AC linear motors Provided is a method for controlling a plurality of AC linear motors of identical specifications which are connected each other and operated synchronously so that they appear to operate as a single linear motor having desired power. The method for controlling...	10/25/2011
8033729	Movement guiding device for vacuum environment A movement guiding device for a vacuum environment is provided so that the device is able to suppress a base oil vaporized in the vacuum environment from leaking to the outside. The movement guiding device for a vacuum environment according to the present invention ...	10/11/2011
8033195	Low-noise screw device Provided is a screw device capable of reducing noise generated therefrom. The screw device has a screw shaft 5 having a rolling-element rolling groove 5a spirally formed on an outer peripheral surface of the screw shaft; a nut 6 ha...	10/11/2011
8030804	Linear motor and linear motor cogging reduction method Provided is a linear motor capable of reducing cogging. The linear motor has a field magnet part 5 having a plurality of permanent magnets 21 arranged to form N and S poles alternately; a core 14 having a plurality of salient poles 14a...	10/04/2011
8016486	Rolling guiding device A rolling guiding device makes it possible to easily provide a movement block with an endless circulation path for the balls. In one surface of a movement block opposed to a rolling groove of a raceway rail, there is formed a track groove through which balls makes a...	09/13/2011
D644959	Track rail	09/13/2011
8006579	Electric linear actuator Provided is an electric linear actuator advantageous in downsizing and weight reduction. The electric linear actuator includes: a housing; a motor held by the housing; a nut member rotatably held with respect to the housing; a screw shaft threadedly engaged with the...	08/30/2011
D643338	Track rail	08/16/2011
D643337	Track rail	08/16/2011
D642959	Track rail	08/09/2011
7988360	Motion guide device Provided is a motion guide device having a scooping portion that is not damaged even when a moving member is moved at high speed. When seen in an axial direction of a track shaft 1, a direction change path 10 is inclined relative to a contact an...	08/02/2011
7984590	Automatic door apparatus At both sides of a pair of doors 10L, 10R, a pair of television cameras (two-dimensional image sensors) 18A, 18B for detecting a moving object, and a pair of spare infrared ray sensors 20A, 20B are provided. A central contro...	07/26/2011
7980763	Motion guide device A motion guide device having a novel scoop section structure whose scoop section is not likely to break even if a movement member is moved at high speed. A scoop section (22) of a movement block (12) scoops balls (13) that roll in a ball rolling...	07/19/2011
7967511	Rotation ring Provided is a slewing ring which has a structure with a large slewing diameter, and is readily produced at low cost. The slewing ring includes: an outer ring (1), in which a load rolling groove (10) and a no-load rolling groove (11) for a large ...	06/28/2011
7967402	Slide rail unit with retaining function Provided is a slide rail unit which, when accommodating a second rail (2) in a first rail (1), can automatically draw in the second rail to an end position and retain it at that position and which can be produced easily with a small number of parts and...	06/28/2011
D640600	Track rail	06/28/2011
7950300	Thrust transfer device A thrust transfer device includes: a motor serving as a driving source; a sun gear rotatable to an output shaft of the motor, a plurality of nut members each provided with an outer peripheral external tooth meshed with the sun gear and provided with an inner periphe...	05/31/2011
7888827	Linear synchronous motor and linear motor actuator Provided is a linear synchronous motor in which, when a three-phase alternating current passes through a coil of a mover, thrust forces generated by the alternating currents of each phase are equalized, thereby making it possible to minimize variation in thrust forc...	02/15/2011
7887239	Guide table device A guide table device is provided with a lower-side plate 10 provided with a pair of rolling member rolling grooves 11 formed in a first (X) direction, an upper-side plate 30 provided with a pair of rolling member rolling grooves 31 formed...	02/15/2011
7883269	Structure for closing a rail mounting hole A structure for closing a track rail mounting hole is disclosed, which prevents a closing cap from being press-fitted with an inclined state into the rail mounting hole, thereby being capable of positively preventing formation of a gap between the rail mounting hole...	02/08/2011
7880344	X-Y table actuator An X-Y table actuator is constituted by stacking a stationary plate, an intermediate plate, and a movable plate. Between the stationary plate and the intermediate plate, arranged is an X-direction drive means for driving the intermediate plate in an X-direction with...	02/01/2011
7845854	Motion guide device A motion guide device 10 includes a track rail 11 as a track member and a movable member 13 mounted to the track rail 11 via a plurality of balls 12. The plural balls 12 of the motion guide device 10 are disposed in a...	12/07/2010
7878992	Power assistance controlling apparatus, power assistance controlling method, and physiotherapy apparatus Tow forces can be measured only by providing one force sensor in a device structure, and a drive system is driven so as to assist an external force by detecting it. A value at a force sensor (114) at the moment when a foot switch (121) is set as the or...	02/01/2011

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Assignee: Thk Co., Ltd.