Did You Know...
...that it was melting ice cream that inspired the invention of the outboard motor? It was a lovely August day and Ole Evinrude was rowing his boat to his favorite island picnic spot. As he rowed, he watched his ice cream melt and wished he had a faster way to get to the island. At that moment the idea for the outboard motor was born!
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| Number | Title | Issue Date |
| 8132478 | Motion guide apparatus A motion guide device includes a ball nut attached onto a shaft and having helical grooves for receiving ball bearing elements, and a ball coupler including a flexible coupling member having a number of openings formed between spacers for receiving ball bearing elem... | 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 |
| 8051736 | Deflecting device for ball screw device A ball screw device includes a screw engaged into a nut member for forming an endless ball guiding passage between the nut member and the screw and for receiving a number of ball bearing members, the nut member includes two orifices aligned with the helical grooves ... | 11/08/2011 |
| 7992461 | Circulating device for motion guide apparatus A motion guide device includes a ball nut attached onto a shaft and having helical grooves for receiving ball bearing elements, a tubular member is engaged with the ball nut and includes a ball circulating pathway communicative with the helical groove of the ball nu... | 08/09/2011 |
| 7845251 | Roller screw having plural circulating devices cooperating with plural helical grooves A roller screw having plural circulating devices cooperating with plural helical grooves comprises a screw, a nut, plural rollers and circulating devices. The screw is provided in a surface with at least two helical grooves. The nut is provided with helical grooves ... | 12/07/2010 |
| 7810406 | Circulating assembly for a ball screw A circulating assembly for a ball screw comprises a cassette and a separator. The fitting hole of the cassette facilitates the installation of the balls, and the separator is inserted in the fitting hole of the cassette, and the sub-return path in the front end of t... | 10/12/2010 |
| 7677126 | Ball screw mechanism A ball screw mechanism including a screw having a first axis and at least one screw groove extending along a first helical path about the first axis, and a nut having a first aperture receiving the screw. The nut also includes at least one nut groove extending along... | 03/16/2010 |
| 7640821 | Circulating member for a ball screw A circulating member for a ball screw is disposed on a nut, the nut is formed with Gothic type threads, and the circulating member of the ball screw is formed with return path for enabling the balls to circulate. The connecting ports at both ends of the return path ... | 01/05/2010 |
| 7628090 | Circulation passage structure for a ball screw A circulation passage structure for a ball screw, the circulation passage structure is used to connect the helical groove and the circulation hole of the nut, so as to form a circulation path for a plurality of balls and spacers. Due to the spacers move in a manner ... | 12/08/2009 |
| 7562599 | Ball screw assembly A ball screw assembly includes a helical groove formed in the outer surface of the screw shaft without extending to both ends thereof, and an escape portion formed in the form of a slot is connected to one end of the helical groove of the screw shaft. The escape por... | 07/21/2009 |
| 7516681 | External circulation type ball screw An external circulation type ball screw comprises a screw, a nut, rolling elements and a return member. The nut is a hollow structure mounted on the screw. The rolling elements are received in the helical groove of the screw and the rolling groove of the nut. The re... | 04/14/2009 |
| 7487692 | Guiding device for ball nut A ball nut includes a nut member having an inner thread formed in a bore for threading with a screw member, the nut member includes a recess and an opening communicating with the bore of the nut member for forming one or more anchoring surfaces. A guiding device inc... | 02/10/2009 |
| 7390241 | 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... | 06/24/2008 |
| 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 |
| 7357048 | Ball screw drive 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 (8) f... | 04/15/2008 |
| 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 |
| 7305902 | Ball screw device A ball screw device comprises a screw shaft, a nut externally mounted on the screw shaft, and a multiplicity of balls interposed between thread grooves of the screw shaft and the nut. The screw shaft has a ball circulation groove for coupling downstream and upstream... | 12/11/2007 |
| 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 |
| 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 |
| 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 |
| 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 |
| 7044016 | Ball screw A ball screw having: a screw shaft having a spiral ball rolling groove; a ball nut having a ball rolling groove corresponding to the ball rolling groove; and a large number of balls interposed between the ball rolling grooves so as to roll freely; wherein the ball r... | 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 |
| 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 |
| 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 |
| 6928894 | Compensated actuator with optimized power An actuator combining mechanical and hydraulic forces includes a cylindrical body and a piston that can slide relative to the cylindrical body. The piston and the cylindrical body are connected by a mechanical system for transmitting mechanical power that constitute... | 08/16/2005 |
| 6874939 | Circulation member, motion guide device provided with circulation member and ball screw provided with circulation member A ball screw comprises a screw shaft, a nut assembled with the screw shaft, a number of balls disposed in the ball rolling passage formed by a ball rolling groove formed to the screw shaft and a loaded ball rolling groove formed to the nut, a number of spacers dispo... | 04/05/2005 |
| 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 |
| 6813969 | Rocker return liner for ball nut A ball nut and return liner assembly includes a ball nut having a tubular body having a longitudinal axis, the tubular body having an inner surface and an outer surface, a plurality of arcuate grooves defined on the inner surface. A longitudinal slot is defined on t... | 11/09/2004 |
| 6776063 | Ball screw In the ball screw, a ball circulation tube 20 is formed to have such a shape that the movable amount of balls 15 in a first direction (X) intersecting at right angles to the axis of the tube 20 is larger than the movable amount of the balls 1... | 08/17/2004 |
| 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 |
| 6722223 | 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... | 04/20/2004 |
| 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 |
