Work Hardening With Other Step Patents (Class 29/DIG49)
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Patent number: 6067701Abstract: A method for forming a work hardened modular component connector for use in orthopedic surgery. This method includes machining a member which forms a portion of the orthopedic implant into an initial configuration having an oversized region. Work hardening a portion of the oversized region of the member. Machining the member into a final precision configuration upon work hardening at least a portion of the oversized region of the member.Type: GrantFiled: December 22, 1997Date of Patent: May 30, 2000Assignee: Biomet, Inc.Inventor: Mark V. Vandewalle
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Patent number: 5786762Abstract: A magnetostrictive element for use in a magnetomechanical article surveillance marker formed by first annealing an amorphous metal alloy, such alloy comprising iron and cobalt with the proportion of cobalt being in the range of about 5 to about 45 atomic percent, in the presence of a saturating magnetic field and then second annealing the alloy in the absence of the saturating magnetic field.Type: GrantFiled: October 22, 1996Date of Patent: July 28, 1998Assignee: Sensormatic Electronics CorporationInventor: Nen-Chin Liu
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Patent number: 5666841Abstract: A method for work-hardening a component to be loaded along a loading axis includes rolling in a notch extending approximately at right angles to the loading axis. The notch has a minimum radius of curvature to be determined in a cross-section parallel to the loading axis. The notch is work-hardened by rolling along a plurality of tracks being adjacent one another along the loading axis and being directed approximately at right angles to the loading axis, with each track covering only a part of the notch. Compressive internal stresses are generated which have axial components and tangential components relative to the loading axis. The axial components are substantially larger than the tangential components. The method is particularly suitable for work-hardening by rolling of a retention groove in a root part of a turbine blade.Type: GrantFiled: September 22, 1995Date of Patent: September 16, 1997Assignee: Siemens AktiengesellschaftInventors: Horst Seeger, Dieter Thiele, Hans Wagner
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Patent number: 5469140Abstract: A ribbon-shaped strip of an amorphous magnetic alloy is heat treated, while applying a transverse saturating magnetic field. The treated strip is used in a marker for a pulsed-interrogation electronic article surveillance system. A preferred material for the strip is formed of iron, cobalt, silicon and boron with the proportion of cobalt exceeding 30% by atomic percent.Type: GrantFiled: June 30, 1994Date of Patent: November 21, 1995Assignee: Sensormatic Electronics CorporationInventors: Nen-chin Liu, Ming-Ren Lian, Jimmy Cantey
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Patent number: 4993150Abstract: A process for the production of cup tappets for reciprocating-piston machines having a pressure plate made from wear-resistant alloyed tool steel and a cup casing, welded to the pressure plate, and made from cheap and cold-extrudable steel utilizes a friction welding process to weld the two parts to one another in a crack-free manner. The cup casing blank is produced by the cold-extrusion process and is carbonized before the welding so that good welding results can thereby be achieved despite the considerable strength differences and cross-sectional differences between the pressure plate and cup casing blanks. As a result of a preheating of the pressure plate, an impairment of the cup casing blank during the frictional heating can be compensated and cracks in the workpiece during or immediately after the welding can thereby be avoided.Type: GrantFiled: August 15, 1989Date of Patent: February 19, 1991Assignee: Daimler-Benz AGInventors: Rudolf Reinhardt, Hans Zechmann
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Patent number: 4949456Abstract: An improved method is provided for finish machining forged and/or rough-cut teeth (8) of a ring gear (40) by which a rotary tool such as a rotary carbide milling tool (24) is rotated about a rotational axis "r" that projectionally intersects a bottom surface (12) of tooth (8) as it tracks along a predetermined tool path enabling the rotary tool to be in close proximity to sidewalls (14 and 14') of teeth (8) and thereby eliminating the practice of having to normalize the ring gear microstructure prior to machining teeth (8).Type: GrantFiled: November 8, 1989Date of Patent: August 21, 1990Assignee: Eaton CorporationInventors: Joseph A. Kovach, Dale B. McCartney
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Patent number: 4704066Abstract: A method for the manufacture of a guide blade for a turbine or compressor guide wheel, uses a profiled bar of heat and corrosion resistant metal that is cut to oversize length. This is in preparation for soldering the bar into a guide wheel, with the bar having at least at one end a baselike thickening which is upset in a cold state, and with a soldering surface formed in its inner zone.Type: GrantFiled: April 17, 1986Date of Patent: November 3, 1987Assignee: MAN Gutehoffnungshutte GmbHInventor: Georg Weissbacher
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Patent number: 4696083Abstract: A method for making hardened essentially disk-shaped machine parts particularly rotor disks for axial roller bearings consisting of the steps of forming the disk to the desired shape in the soft state, densifying at least one annular ring-shaped section of the disk by rolling or pressing and thereafter hardening the entire disk.Type: GrantFiled: November 7, 1985Date of Patent: September 29, 1987Assignee: SKF GmbH, SchweinfurtInventors: Armin Olschewski, Manfred Brandenstein, Hermann Hetterich, Heinrich Kunkel
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Patent number: 4325511Abstract: Improvement in rail clips formed from metal plate in which the edges of the clip arms adjacent the locations of the clip subject to highest stress, are coined to prevent stress fractures occurring. The preferred form of rail clip is a D configuration in side view in which one portion seats on the foot of the rail and the other portion seats in a clip holder secured to a rail sleeper.Type: GrantFiled: May 4, 1979Date of Patent: April 20, 1982Assignee: Ralph McKay LimitedInventor: Hartley F. Young
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Patent number: 4125929Abstract: A method employing a deformable metallic element is disclosed particularly characterized in that the element is formed of a hard resilient metal which undergoes work hardening when it is deformed beyond the elastic limit thereof. The element is made in the form of a relatively thin walled tubular member convoluted in longitudinal cross section. Upon axial compression the element undergoes a first period of resilient deformation during which the compressive force increases substantially linearly followed by a second period of plastic deformation during which the compressive force remains constant. The method is suited to imposing a substantially constant predetermined preload on a pair of opposed members.The element of the present invention is particularly useful as a load member to create a predetermined load on a part which it is desired to maintain under a predetermined constant load.Type: GrantFiled: September 30, 1977Date of Patent: November 21, 1978Assignee: Temper CorporationInventor: John E. Rode