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| Number | Title | Issue Date |
| 8100025 | Rolling element retainer A rolling element retainer is provided with two through rolling element retaining spaces. Each of the rolling elements retaining spaces is provided for accommodation of one rolling element. The rolling element retainer is provided with a linking portion at each of t... | 01/24/2012 |
| 8015894 | Intelligent transmission element An intelligent transmission element includes a first element formed in a strip shape and disposed with a slot therein; a second element disposed with a containing space for placing the first element, wherein the inner side of the containing space is disposed with a ... | 09/13/2011 |
| 7493837 | Partition room and spacer ball for ball screw unit A ball screw unit has a plurality of partition-rooms each of them accommodating a spacer ball interposed between two load carrying balls. The partition room is formed into two oblique frustum shaped recesses each of them extends a flared mouth tilted downwards to th... | 02/24/2009 |
| 7419303 | Ball connecting body for a rolling motion apparatus A ball connecting body for a ball screw or a linear guide-way, comprises spacers, guide linking members, and connecting members. The spacers are interposed between two adjacent balls, thereby preventing the two balls from hitting. The guide linking members are used ... | 09/02/2008 |
| 7278332 | Linear motion device A linear motion device has: a linear motion body externally fitted onto a shaft and making a relative linear motion along the shaft; a plurality of balls retained in a rolling element groove formed in an inner surface of the linear motion body, and rolling between t... | 10/09/2007 |
| 7263908 | Ball screw Ball screw, between the spindle nut (1) and threaded spindle (2) of which at least one ball chain (6, 8) formed from balls (9) rolls in each case along a ball channel (5) which is delimited by ball grooves (3, 4) formed on t... | 09/04/2007 |
| 7222553 | Ball screw apparatus The invention provides a ball screw apparatus which suppresses abrasion and damage by competition of balls, controls spaces between retaining pieces and balls, and prevents retaining pieces from falling, thereby enabling to more improve operating ability. The retain... | 05/29/2007 |
| 7207235 | Ball screw mechanism and electric power steering apparatus using such mechanism An electric power steering apparatus comprises a rack-and-pinion mechanism and a ball screw mechanism. The ball screw mechanism comprises a shaft formed a screw groove and a nut formed a screw groove. A ball-roll path is created spirally by the screw grooves of the ... | 04/24/2007 |
| 7207234 | Ball screw In a ball screw, a nut is fitted with the outer periphery of a screw shaft, ball rolling grooves opposed to each other are formed in the screw shaft and the nut The ball rolling grooves cooperate in forming a ball rolling path therebetween. A tube as a return path d... | 04/24/2007 |
| 7159484 | Linear motion device A linear motion device includes an inner member and an outer member cooperatively forming a ball circulating path therebetween, a plurality of balls rollably disposed in the ball circulating path, and a plurality of retaining pieces interposed between the balls, whe... | 01/09/2007 |
| 7080571 | Ball screw A ball screw has a screw shaft including a spiral-shaped ball rolling groove formed in an outer peripheral surface thereof; a nut including a spiral-shaped ball rolling groove formed in an inner peripheral surface thereof; a plurality of balls disposed in a raceway ... | 07/25/2006 |
| 7062987 | Ball bearing and a continuously variable speed transmission of belt type A ball screw in a continuously variable speed transmission has an axially immovable pulley half (2) and axially movable pulley half (3) both mounted on a rotary shaft (4). The axially movable pulley half (3) is moved by a ball screw (2... | 06/20/2006 |
| 7044017 | Roller screw system A higher efficiency roller screw system that includes a nut body designed to engage a threaded shaft. The nut body includes a center bore with closed, partial helical grooves formed therein. Disposed inside the center bore is a shaft with open helical threads formed... | 05/16/2006 |
| 7024958 | Linear motion apparatus and method for manufacturing thereof A linear motion apparatus has a guide shaft including a spiral-shaped or linear-shaped rolling element rolling groove, a movable body including a spiral-shaped or linear-shaped rolling element rolling groove opposed to the rolling element rolling groove of the guide... | 04/11/2006 |
| 7004633 | Rolling element retainer A rolling element retainer whose respective components are allowed to move angularly with respective to each other, and the engagement between the ring portion and the trough of the respective units is in form of the engagement of cylindrical ring portion with curve... | 02/28/2006 |
| 6997078 | Ball screw apparatus A ball screw apparatus which can suppress retaining pieces from contacting a wall of a ball rolling path or ball circulating path, and suppress the retaining pieces between the balls from falling down, so that such a ball screw apparatus can be improved in noise red... | 02/14/2006 |
| 6993992 | Ball screw A ball screw which is little subject to deterioration of operating characteristics and occurrence of wear, torque change, noise, vibration, etc. during operation due to stagnation or competition of balls. The ball screw includes a screw shaft having a helical thread... | 02/07/2006 |
| 6955468 | Linear-motion device and ball screw A linear-motion device has: a linear-motion element fitted on a shaft which moves straight along the shaft; a plurality of balls which are retained in a ball groove formed on the inner side of the linear-motion element and roll over between the ball groove and the s... | 10/18/2005 |
| 6923575 | Ball spacer and rolling device using it The present invention relates to a ball spacer and the rolling device using it. The ball spacer of the present invention makes the ball doesn't touch to his adjoining ball, so as to reduce the noise. Besides, the ball spacer comprises a cylinder surface touching to ... | 08/02/2005 |
| 6892596 | Rolling element interference preventer and a guide device A rolling element interference preventer for a guide device prevents a number of rolling elements rolling at regular intervals in a continuous circulation path of the guide device from interfering with each other. The rolling element interference preventer is formed... | 05/17/2005 |
| 6779419 | Linear motion guide bearing device and ball screw device A rolling element series is formed with a plurality of spherical rolling elements and four kinds of retainer pieces. The element-to-element thicknesses TA, TB, TC, and TD of the retainer pieces are different: TA>TB>TC>TD. | 08/24/2004 |
| 6769324 | Ball screw A super finishing is carried out after grinding, so that surface roughness of a ball rolling groove of a screw shaft is made 0.12 μm or less in an average roughness (Ra). Separators 7 having ball holding surfaces shaped in concave surface are disposed betwee... | 08/03/2004 |
| 6742408 | Ball screw mechanism Between two mutually adjoining load balls 5, there is interposed a retaining piece 10 having two concave surfaces 11 which are respectively opposed to the two adjoining load balls 5. The retaining piece 10 has an outside diameter d... | 06/01/2004 |
| 6742931 | Rolling ball separator structure of a linear drive member A rolling ball separator structure of a linear drive member includes multiple separators mounted between the multiple rolling balls and each having a body and an outer ring structure. Thus, the body may be deformed elastically, thereby preventing the multiple separa... | 06/01/2004 |
| 6668673 | Ball screw with ball retainer cage A ball screw with ball retainer cage equipped between the screw bolt and the nut body is disclosed. The adjacent balls can move without squeezing each other and well protected in the retainer cage from dropping off therefrom when the retainer cage is disi... | 12/30/2003 |
| 6644140 | Ball screw A ball screw having spacers which can assuredly be retained between balls and prevent direct contact between the balls. The ball screw includes a plurality of spacers (1) provided between respective adjacent pairs of balls. The spacers (1) each include a ... | 11/11/2003 |
| 6616335 | Rolling element spacer in rolling guide device There is provided a rolling element spacer used in a rolling guide device having an endless circulation passage of balls, arranged alternately with many balls in the endless circulation passage, and circulating together with the balls in the endless circu... | 09/09/2003 |
| 6575632 | Roller retainer, roller screw using roller retainer and rolling guide apparatus using roller retainer A roller retainer 11 encloses an outer periphery of the roller 9 situated on a diagonal 20 when the roller 9 is viewed from the side surface thereof. Whether the rollers 9 are arranged in a parallel manner or in a cross manner, the roller retainer 11 is a... | 06/10/2003 |
| 6561054 | Ball screw with spacers A spacer interposed between two adjacent balls formed into an elaborately designed cylinder like configuration which is able to minimize noise, vibration and frictional loss due to mutual collision and impact of the balls. The spacer is provided with a le... | 05/13/2003 |
| 6513978 | Rolling element spacers for rolling guide units The present invention provides rolling element spacers used in a rolling guide unit provided with an endless circulating passage for balls; arranged with plural balls alternately therewith in the endless circulating passage; and circulated with these ball... | 02/04/2003 |
| 6499374 | Ball screw with alternately disposed steel balls and ceramic balls A ball screw comprising a screw shaft 1 made of steel and having a thread groove 6 on outer peripheral surface, a ball nut 2 made of steel and having a thread groove 7 opposing the thread groove 6 on inner peripheral surface, a return tube 3 attached on t... | 12/31/2002 |
| 6484599 | Nut unit A nut unit (20) for use in a ball screw drive comprises a sleeve-shaped nut body (10) that is made of an essentially rigid material and that has an axis (A) and an inner circumferential surface (14). A one-piece, channel-shaped, ball-guiding strip materia... | 11/26/2002 |
| 6415676 | Ball screw device having spacers A ball screw device utilizes spacers having concave ball-contacting surfaces with distributed protrusions or dimples. Balls having needle-like recesses may also be used. The spacers are provided in two thicknesses, and the relative numbers of the thinner ... | 07/09/2002 |
| 6286383 | Ball screw device This invention relates to improvement of a ball screw unit in which a nut member meshes with a screw shaft via a plurality of balls circulating endlessly. The balls are disposed freely rotatably in line at a predetermined interval in a ball arranging memb... | 09/11/2001 |
| 6247846 | Rolling element and rectilinearly-movable apparatus using the rolling element A rolling-element hold spacer 9 includes a spherical indent 11 which is formed in either side of a rolling element 7 so as to match the curved surface of the rolling element 7; thick hold sections 10a, 10b to be interposed between the rolling elements 7; ... | 06/19/2001 |
| 6095009 | Ball screw having spacers In order to provide a ball screw, ball, which allows to reduce the ball's noise and prevent wearing and clogging of ball s without decreasing its loading capacity, without using a ball chain or spacer balls, a cylindrical spacer 20 is disposed at each are... | 08/01/2000 |
| 6070479 | Rolling element string and linear guide device and rolling element screw device using the same The invention provides a rolling element string which can be bent or twisted freely in any direction in use while holding rolling elements such as balls or rollers surely and which can be used in existing linear guide devices and ball screw devices withou... | 06/06/2000 |
