Work Hardening With Other Step Patents (Class 29/DIG49)
  • Patent number: 6067701
    Abstract: 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: Grant
    Filed: December 22, 1997
    Date of Patent: May 30, 2000
    Assignee: Biomet, Inc.
    Inventor: Mark V. Vandewalle
  • Patent number: 5786762
    Abstract: 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: Grant
    Filed: October 22, 1996
    Date of Patent: July 28, 1998
    Assignee: Sensormatic Electronics Corporation
    Inventor: Nen-Chin Liu
  • Patent number: 5666841
    Abstract: 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: Grant
    Filed: September 22, 1995
    Date of Patent: September 16, 1997
    Assignee: Siemens Aktiengesellschaft
    Inventors: Horst Seeger, Dieter Thiele, Hans Wagner
  • Patent number: 5469140
    Abstract: 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: Grant
    Filed: June 30, 1994
    Date of Patent: November 21, 1995
    Assignee: Sensormatic Electronics Corporation
    Inventors: Nen-chin Liu, Ming-Ren Lian, Jimmy Cantey
  • Patent number: 4993150
    Abstract: 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: Grant
    Filed: August 15, 1989
    Date of Patent: February 19, 1991
    Assignee: Daimler-Benz AG
    Inventors: Rudolf Reinhardt, Hans Zechmann
  • Patent number: 4949456
    Abstract: 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: Grant
    Filed: November 8, 1989
    Date of Patent: August 21, 1990
    Assignee: Eaton Corporation
    Inventors: Joseph A. Kovach, Dale B. McCartney
  • Patent number: 4704066
    Abstract: 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: Grant
    Filed: April 17, 1986
    Date of Patent: November 3, 1987
    Assignee: MAN Gutehoffnungshutte GmbH
    Inventor: Georg Weissbacher
  • Patent number: 4696083
    Abstract: 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: Grant
    Filed: November 7, 1985
    Date of Patent: September 29, 1987
    Assignee: SKF GmbH, Schweinfurt
    Inventors: Armin Olschewski, Manfred Brandenstein, Hermann Hetterich, Heinrich Kunkel
  • Patent number: 4325511
    Abstract: 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: Grant
    Filed: May 4, 1979
    Date of Patent: April 20, 1982
    Assignee: Ralph McKay Limited
    Inventor: Hartley F. Young
  • Patent number: 4125929
    Abstract: 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: Grant
    Filed: September 30, 1977
    Date of Patent: November 21, 1978
    Assignee: Temper Corporation
    Inventor: John E. Rode