Did You Know...
...When G.G. Hubbard learned of his future son-in-law's invention, he called it "only a toy." His daughter was engaged to a young man named Alexander Graham Bell.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 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 |
| 8109169 | Ball screw device A ball screw device 10 capable of increasing a load capacity by increasing the size of ball diameter and the number of threads by preventing the cutout of a nut from being interfered with a thread groove adjacent to the cutout even in the thread groove of a s... | 02/07/2012 |
| 7921743 | Ball screw device A ball circulating member constructed in an external face of a nut is provided with ball scooping sections for scooping up balls rolling on between ball screw grooves of a screw shaft and the nut, along a line tangent to a center orbital circle of the balls. The pat... | 04/12/2011 |
| 7832300 | Roller screw There is provided a roller screw comprising a screw shaft 1 having an outer peripheral surface in which a spiral roller rolling groove 1a is formed, a nut member 2 having an inner peripheral surface in which a spiral loaded roller rolling... | 11/16/2010 |
| 7614318 | Recirculating ball screw and nut drive A recirculating ball screw and nut drive including a spindle, a spindle nut guided on the spindle, balls guided between the spindle and the spindle nut, in a working passage defined by grooves of the spindle and spindle nut, and deflection pieces arranged on both en... | 11/10/2009 |
| 7591205 | Ball screw and a method for assembling the same A ball screw includes a screw shaft 1, a nut 2 screwed to the screw shaft 1 via balls 3 rollably charged to a ball rolling path 5 in a spiral shape, a ball return path 6 for circulating the ball 3 by delivering the ba... | 09/22/2009 |
| 7536929 | Ball screw and method for producing a spindle nut, in particular of a ball screw Method for producing a spindle nut of a ball screw, by provided the circumference of the nut with at least one through-opening for receiving a deflecting piece for balls of the ball screw. A hole punch arranged in the spindle nut and operable to punch out the throug... | 05/26/2009 |
| 7533593 | Ball screw unit with dust cleaning and ball deflecting element fixing mechanism A ball screw unit with dust cleaning and ball deflecting element fixing mechanism includes an annular inlaid slot along the inner surface of a nut proper proximate to the outside of a ball deflecting element. A fixed dust scrape formed of a C shaped annular packing ... | 05/19/2009 |
| 7523682 | Ball screw device having a ball guide member A ball screw device includes a screw shaft threaded with a ball nut which has two channels and an opening, a guide member is engaged into the opening of the ball nut and has two curved pathways communicating with the channels to form two separated endless ball rolli... | 04/28/2009 |
| 7520193 | Ball screw assembly A ball screw assembly, wherein the circulate component is positioned in the nut by inserting a protrusion in a notch, so that the circulate component is positioned easily, and the problem of assembly difficulty is solved. The method of fixing the circulate component... | 04/21/2009 |
| 7461572 | Rolling body screw device A return pipe is constituted by combining a pair of return pipe halves split along a non-load passage. A pipe hold down member is fixed to a nut member so as to be astride the return pipe, fixing the return pipe to the nut member. A flange portion is formed on each ... | 12/09/2008 |
| 7363835 | Ball screw apparatus A ball screw apparatus includes: a screw shaft having a screw groove, a nut having a screw groove and holes, a number of balls rollably provided between the screw grooves, and a ball circulating member having an end portion to be fitted to the holes. The ball circul... | 04/29/2008 |
| 7350434 | Ball screw device The invention relates to a ball screw device in which a screw shaft and a nut member are threadedly engaged with each other through a number of balls. In such a ball screw device, an inner surface of a cover plate contacting an end surface of a nut main body is prov... | 04/01/2008 |
| 7337689 | Ball screw mechanism, machining method for joint between nut and ball circulation piece, and electric power steering device A ball screw mechanism including a screw shaft with a screw groove formed on an external surface, a nut with a screw groove formed on an internal surface, and plural balls held in the grooves. A ball circulation piece is fit in a window portion in the nut and has a ... | 03/04/2008 |
| 7322256 | Ball screw mechanism for electric power steering apparatus A first ball circulating hole and a second ball circulating hole for connecting a circulator are bored midway at a screw groove formed on an inner circumference of a ball nut, an intermediate groove path between the first and second ball circulating holes becomes th... | 01/29/2008 |
| 7287910 | Angular ball bearing and rolling bearing A rolling bearing is constructed so that, even though adapted for seals, strength of the bearing rings and reduction of the front width will not occur. Also dimensions equivalent to a non-sealed type bearing can be achieved. Rolling elements are disposed between an ... | 10/30/2007 |
| 7267616 | Method for making a ball-nut and method for making a ball-screw A method for making a ball-nut includes cutting a 360-degree closed-loop surface groove in the inner-circumferential wall portion of a ball-nut body using a whirling-type internal-diameter cutting machine. The closed-loop surface groove surrounds the longitudinal ax... | 09/11/2007 |
| 7234368 | Ball screw device having lubricating structure A ball screw device includes a ball nut having an inner thread formed by a number of helical groove portions, a screw shaft having an outer thread formed by a number of helical groove portions, for threading with the inner thread of the ball nut, and a number of rol... | 06/26/2007 |
| 7210369 | Ball screw drive In a ball screw drive comprising a spindle nut (2) that can be disposed on a spindle (1), said spindle nut (2) comprising on an inner periphery, a ball groove (3) that is arranged along a helix and defines a load-bearing channel (6... | 05/01/2007 |
| 7185553 | Screw feed apparatus A screw feed apparatus has a screw shaft having a screw groove formed on the outer peripheral surface thereof; a nut having a screw groove formed on the inner peripheral surface thereof opposed to the outer peripheral surface of the screw shaft; a large number of ro... | 03/06/2007 |
| 7159515 | Device for attaching a roller to an abutment moving essentially at the peripheral speed of the roller by means of a spindle-nut combination A spindle-nut combination for applying a roller to a counterbearing moved essentially at the circumferential speed of the roller. In order to be able to adjust the play of the spindle in a simple manner, an additional nut is associated with, and displaceable against... | 01/09/2007 |
| 7114429 | Power steering assist apparatus and method of retrofitting A power steering assembly and method of retrofitting therefore includes a housing having a cavity defined therein. A drive member extends axially into the cavity and a first piston and a second piston are received in the cavity for axial reciprocation therein. The f... | 10/03/2006 |
| 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 |
| 7045913 | Microturbine engine system A microturbine engine that includes a compressor that is operable to provide a flow of compressed air. The compressed air flows through a recuperator where it is preheated before delivery to a combustor. The preheated compressed air mixes with a fuel and is combuste... | 05/16/2006 |
| 7040189 | Circulation member of ball screw and ball screw using same A circulation member of a ball screw for circulating a ball rolling on a spiral ball rolling groove formed on a screw shaft. The circulation member includes a central portion and a pair of leg portions disposed at both ends of the central portion so as to extend the... | 05/09/2006 |
| 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 |
| 7017437 | Ball screw In a ball screw drive comprising a spindle (1), a nut (3) surrounding the spindle (1), and balls (4) arranged between the spindle (1) and the nut (3), which balls (4) are in rolling contact with a screw track (2 | 03/28/2006 |
| 6978693 | Ball screw The invention is a ball screw, comprising: a shaft having a spiral-shaped shaft; a nut having a spiral-shaped nut ball groove and screwed with the shaft via a plurality of balls; and a ball circulation passage for raking the plurality of balls at one end of the ball... | 12/27/2005 |
| 6941831 | Ball screw apparatus The ball screw apparatus of an end cap type comprises a ball nut which includes a nut main body having a ball circulation hole penetrating through the nut main body in the axial direction thereof and two end caps respectively fixed to the two end portions of the nut... | 09/13/2005 |
| 6938510 | Ball screw apparatus A ball screw apparatus, has a screw shaft including a screw groove; a nut fitted with the screw shaft, the nut including a screw groove and a ball return passage; a circulation piece including a ball circulation passage; and, a large number of balls, wherein, in the... | 09/06/2005 |
| 6898994 | Ball nut and screw assembly A ballscrew and ball nut assembly with complimentary threads providing a ball raceway having a ball re-circulation path within the screwshaft of the ballscrew provided on the peripheral surface of a screwshaft insert and including end passages which communicate with... | 05/31/2005 |
| 6851722 | Coupled circulation tube for ball screw unit A coupled circulation tube for a ball screw unit. The tube is formed on a planar surface at one side of the ball screw bearing, each tube joined to two circulation holes. Each circulation tube is formed by coupling two symmetrical rigid metallic half tubes at recess... | 02/08/2005 |
| 6813970 | Ball-nut assembly and method for making A ball-nut assembly includes a ball nut and a crossover member. The ball nut incudes a radial through slot and an outer surface. The outer surface has a first portion, has a ledge radially recessed from the first portion and at least partially bounding the through s... | 11/09/2004 |
| 6736235 | Powered steering device and ball screw mechanism therefor A portion of a steering shaft 2 capable of being advanced and retracted defines a ball screw shaft 2a of a ball screw mechanism 13. A motor rotor 10 of an electrically driven motor 8 for providing a steering assist force is ... | 05/18/2004 |
| 6681651 | Ball screw There is provided a return pipe type ball screw capable of accurately positioning and fixing return pipes on and to a nut member even when a troublesome positioning operation is not carried out, and circulating balls endlessly and smoothly for a long peri... | 01/27/2004 |
| 6675669 | Ball screw apparatus A ball screw apparatus is provided with a screw shaft having a spiral ball screw groove, a nut member having a screw groove, and a plurality of balls. A smoothly continuous worked portion is formed at a portion of the screw groove by grinding a corner por... | 01/13/2004 |
| 6668672 | Ball screw nut Ball screw nut is composed of an inner threaded nipple and an outer housing. The nipple is constructed with a hollow hard tubular metallic material to ensure the strength of the structure; while the outer housing where requires less strength is formed of ... | 12/30/2003 |
| 6561053 | Rolling-body screw drive A rolling-body screw drive (10) comprises a threaded spindle and a threaded nut (12) enclosing the threaded spindle. A helically running threaded channel (16) is provided between an outer circumferential surface of the threaded spindle and an inner circum... | 05/13/2003 |
| 6450055 | Ball screw apparatus A ball screw apparatus comprises a screw shaft, a nut, and a plurality of balls. A first helical groove is formed at an outer peripheral surface of the screw shaft. A second helical groove is formed at an inner peripheral surface of the nut. A rolling con... | 09/17/2002 |
| 6425302 | Rolling-body screw drive with radially inserted circulatory element A rolling-body screw drive includes a threaded spindle and a threaded nut (10) enclosing the threaded spindle, a helically running threaded channel being provided between an outer circumferential surface of the threaded spindle and an inner circumferentia... | 07/30/2002 |
