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A method of swing on a swing is disclosed, in which a user positioned on a standard swing suspended by two chains from a substantially horizontal tree branch induces side to side motion by pulling alternately on one chain and then the other.
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| Number | Title | Issue Date |
| 8091399 | Process for manufacturing a seamless tube A process for manufacturing a seamless tube which can effectively suppress thickness deviations which are apt to occur in thin-walled seamless tubes is provided. A billet which has been soaked in a heating furnace at a given temperature for a given length of time is... | 01/10/2012 |
| 8065901 | Mandrel bar for high-alloy rolling, method for surface treating a mandrel bar, method for producing mandrel bar, and method for operating seamless pipe mill A method for surface treating a mandrel bar used for hot rolling of high-alloy seamless steel pipe is provided. The method includes heat treating the mandrel bar to develop a scale, and after heat treatment, rolling ordinary steel comprising 8% or less of chromium f... | 11/29/2011 |
| 8047039 | Process for producing stainless steel pipe A process for stainless-steel pipe production which comprises piercing rolling a raw material stainless steel containing, by mass, Cr: 10-30%, to give a hollow shell, elongating rolling the hollow shell using a mandrel bar, together with a graphite-free lubricant, t... | 11/01/2011 |
| 8020422 | Tubular product and manufacturing method and manufacturing device thereof A tubular product comprises a side section having outer surfaces disposed along a parallelogram and a bottom section formed on one end of the side section. The outer surfaces of the side section are pressure formed by a roller. The tubular product preferably is manu... | 09/20/2011 |
| 7992417 | Method for producing ultra thin wall metallic tube by cold rolling method An aspect of the present invention provides a method for producing an ultra thin wall metallic tube by a cold rolling method with significant wall thickness reduction. In a method for producing the metallic tube with a cold pilger mill, a wall thickness is reduced t... | 08/09/2011 |
| 7895870 | Method for producing ultra thin wall metallic tube with cold working process An exemplary embodiment of the invention provides a method for producing an ultra thin wall metallic tube by cold working method with significant wall thickness reduction. In a method for producing the metallic tube with a cold pilger mill according to the invention... | 03/01/2011 |
| 7661284 | Application method of Cr-plated mandrel bar for hot rolling The present invention provides an application method of a Cr-plated mandrel bar repeatedly used in mandrel mill rolling by the Mannesmann tube making process. A regeneration treatment is performed to use the mandrel bar again as a tool of like size when an opening w... | 02/16/2010 |
| 7404310 | Mandrel anchor for tube bending A mandrel assembly is provided for insertion into a hollow tube to support the interior walls of the tube during bending of the tube in a tube bending apparatus. The mandrel assembly includes at least one mandrel segment that is adapted for positioning within the tu... | 07/29/2008 |
| 7328599 | Method and apparatus for making metal ball bats A process for manufacturing a hollow metal ball bat includes forming a shell into a tubular shape using a pilger mill. The wall thickness of the tube shell is reduced by drawing the tube shell with the draw bench. A handle section and a taper section are created usi... | 02/12/2008 |
| 7293443 | Method for manufacturing seamless pipes or tubes A method for manufacturing a seamless pipe, capable of preventing the carburization phenomenon that occurs in a manufacturing process of pipe and simplifying an elongation rolling process, is provided. In this method, after piercing in the piercing rolling process, ... | 11/13/2007 |
| 7290424 | Push bench method for manufacturing small diameter tubing The present invention involves cost effective, efficient systems and methods for sizing pipe. In an embodiment of the present invention, a pipe sizing system includes a die having an opening operable to size the pipe, a hydraulic cylinder having at least one rod att... | 11/06/2007 |
| 7222509 | Groove processing apparatus and groove processing method The holder member 4 is rotatably supported at the tip portion 2a of the sliding member 2 placed on the guide face 1a of the guide member 1 arranged fixedly inside the cylinder C. The holder member 4 is inclined... | 05/29/2007 |
| 7197906 | Cold rolling process for metal tubes In the cold rolling process by pilger rolling that holds a mandrel between each of paired roll-dies, by optimizing the side relief rate SR and the pass schedule factors such as the Area Rd, ID Rd and the feed rate F of the workpiece material, and further by properly... | 04/03/2007 |
| 7188501 | Cold rolling process for metal tubes In the cold rolling process by pilger rolling that holds a mandrel between each of paired roll-dies, by optimizing the side relief rate SR and the mandrel factors like the taper θ1 in the primary deformation zone of the mandrel and the taper θ2 in th... | 03/13/2007 |
| 7174761 | Method of manufacturing a seamless pipe When manufacturing a seamless pipe by carrying out elongation rolling and sizing on a mother tube for forming a seamless pipe, the occurrence of portions of thickness variation in the seamless pipe is suppressed by previously identifying the portions of wall thickne... | 02/13/2007 |
| 7165431 | Cr-plated mandrel bar for manufacturing hot seamless tube and method of manufacturing the same By employing a Cr-plated mandrel bar for producing hot seamless tubes according to the present invention wherein centerline average roughness Ra in axial and circumferential directions as well as maximum depth Rv in axial and circumferential directions is specified ... | 01/23/2007 |
| 7127928 | Core bar for bending of a pipe and method of bending of a pipe A core bar for bending of a pipe and a method of bending of a pipe are provided whereby collapse of the pipe can be prevented and bending can be automated at low cost. Ends of the respective core bar portions are formed such that, when the ends of the two cylindrica... | 10/31/2006 |
| 7093469 | Manufacturing method and manufacturing apparatus of pipe, thickness deviation information derivation apparatus, and computer program A complex Fourier transform is performed on measured values of wall thickness at points in a cross section of a pipe in an axial direction, types of thickness deviation are classified, thickness deviation amount is calculated from the absolute value of the complex F... | 08/22/2006 |
| 7036249 | Tooth adapter having an elastomeric clamp assembly and method for using same A tooth adapter having an elastomeric clamp assembly and a method for using the same are provided. The system includes a tooth adapter having a first end operable to receive a removable tooth point and a second end having an upper blade and a lower blade, the upper ... | 05/02/2006 |
| 7032334 | System and method for coupling excavation equipment components In accordance with a particular embodiment of the present invention, a system for coupling excavation equipment components includes a pin assembly configured to couple a first tool body to a second tool body. The pin assembly is configured to be received at least pa... | 04/25/2006 |
| 7028518 | Method of producing seamless steel tubes A method of producing a seamless steel tube to enable it to suppress not only the deviations in wall thickness occurring in the direction of reduction in a mandrel mill but also the derivations in thickness occurring at places deviating from the direction of reducti... | 04/18/2006 |
| 7021171 | Annulus gear and drive shell A method of producing a torque transmission between a driving member and a driven member including the steps of capturing an annular gear within the interior of a hollow cylindrical shell formed of a formable material which is caused to be flow formed around a porti... | 04/04/2006 |
| 6976377 | Method of and apparatus for producing tubes of metal In the planetary skew rolling blooms to form seamless metal tubing or pipe the internal tool is retracted at the leading and/or trailing end of the tubular bloom to allow the rolls to seal the end or ends and prevent coolant from entering the rolled tubing or bloom.... | 12/20/2005 |
| 6945135 | Bicycle stem for enlarged handlebar portions and associated methods A bicycle stem may include a body portion and a handlebar clamping portion connected thereto, and a handlebar clamping member cooperating with the handlebar clamping portion to clamp the bicycle handlebar. The handlebar clamping member and the handlebar clamping por... | 09/20/2005 |
| 6912928 | Bicycle stem including enhanced clamp and associated methods A bicycle stem includes a steering tube clamp with a pair of cooperating clamp members defining an imaginary cylinder and a recess therein for the steering tube. Each clamp member may also have at least one fastener receiving passageway therein offset a predetermine... | 07/05/2005 |
| 6834523 | Method for producing seamless tube with grooved inner surface Disclosed is a producing method which allows low-cost and highly productive production of a seamless tube with a grooved inner surface having a smooth outer surface and an inner surface formed with plural types of grooves such that a protrusion is not formed at the ... | 12/28/2004 |
| 6718811 | Process for producing a guide tube of a nuclear reactor fuel assembly, mandrel for forming the guide tube, and the guide tube obtained A tubular blank (22) is rolled on a mandrel (14) in a pilgrim rolling mill. In a first rolling stage, a first part of the blank (22) is rolled on a first part (18,19) of the mandrel (14), with a reduction of the outside diameter of... | 04/13/2004 |
| 6543132 | Methods of making mud motors The present invention provides methods of forming mud motors. In one method, rollers are urgingly stroked against a tubular member having a mandrel therein that has an outer profile which is the inverse of the desired profile of the stator. In another met... | 04/08/2003 |
| 6530254 | Rolling machine A rolling machine for processing a metal container which has a longitudinal seam and is made from a flat metal plate to form a cylindrical body having adjacent or overlapping butt edges securely joined to one another by folding or welding, whereupon a dis... | 03/11/2003 |
| 6360575 | Calibration of an instrument for the cold-rolling of tubes This invention relates to the plastic metal working, particularly to tube rolling production and can be applied for tube cold pilgering on rolling machines. Tool design for tube cold pilgering, in which, in order to increase accuracy, surface quality, mec... | 03/26/2002 |
| 6260396 | 2-Roll piercing mill and method of producing hollow blocks from high alloy steels A 2-roll piercing mill for producing hollow blocks from a rolled material comprising high alloy steels has guide tools for the rolled material. The guide tools are arranged for closing a reforming zone of the piercing mill transversely with respect to the... | 07/17/2001 |
| 6216511 | Apparatus and method for smoothing a welded seam of steel pipe A method and apparatus for smoothing a thick walled portion of a steel pipe produced by pressure-welding two opposite longitudinal edges of an open pipe with a squeeze roll after being subjected to induction heating. Outer and inner reduction rollers pres... | 04/17/2001 |
| 6205833 | Cold pilger rolling tool for producing internally ribbed tubes A cold pilger rolling tool for producing internally ribbed tubes uses a cold pilger step rolling process in a rolling stand that is movable back and forth in a direction of rolling and has rolls of a tapered design. The rolls of the stand roll along a mat... | 03/27/2001 |
| 6012313 | Process for producing seamless tubes in cold rolling mills and for the formation and electronic regulation of external thrust Process for creation and adjustment, from one moment to the next, of the external force to apply by the feed assembly to the preformed forging in cold rolling mills of the "pilgrim process" type with rollers and mandrel for producing seamless tubes by mea... | 01/11/2000 |
| 6006575 | Reversible mandrel bar assembly The present invention is of a mandrel bar assembly for a seamless pipe mill. The assembly includes a pair of tooling sections each having a tapered end, a reduced diameter portion axially inward of the tapered end adapted to be gripped by a retaining mean... | 12/28/1999 |
| 5992597 | Multiple disk clutch and method and apparatus for forming clutch drum A multiple disk clutch includes a clutch drum having an interior surface with a plurality of spline grooves, a servo piston, a clutch plate with splines engaged within the spline grooves, and a cushion plate, with splines engaged within the spline grooves... | 11/30/1999 |
| 5972132 | Progressive densification of powder metallurgy circular surfaces Inner or outer cylindrical worked surfaces of powder metal components are bearingized by orbiting tapered rollers against them using a tapered mandrel having points for impacting the rollers against the worked surface.... | 10/26/1999 |
| 5953947 | Method and apparatus for forming a profile in a wall of a hollow cylindrical work piece Hollow cylindrical blanks of tubular stock are transformed into finished work pieces (3) in a single work stroke with a profiling tool (7) equipped with profiling rollers (30) in one tool section (8) and a die matrix (15) in another tool section (6). The ... | 09/21/1999 |
| 5916320 | Method for manufacturing tubes using the cold pilger rolling method Disclosed are a method and apparatus for manufacturing tubes, preferably tubes composed of high-tensile steels or special alloys, using the cold pilger rolling method with two rolling stands which can be moved backward and forward, at least in opposite di... | 06/29/1999 |
| 5907969 | Tool for working shaped, hollow metal tubing to achieve an end reduction A tool is provided for working a shaped metal tube, such as a square or rectangular metal tube, having a hollow interior and an outer surface to produce an end reduction in the tube. The tool includes a head having a longitudinally extending interior cavi... | 06/01/1999 |
