Method Or Apparatus With Knurling Patents (Class 29/DIG23)
  • Patent number: 5946991
    Abstract: A method and apparatus for knurling a workpiece in which the knurl pattern includes grooves of at least two different configurations. The apparatus includes a knurl wheel holder that allows angular rotation of the knurl wheel about the holder longitudinal axis while maintaining the knurl wheel point of contact on the longitudinal axis. The apparatus also a knurling wheel that includes teeth of at least two different configurations. Also disclosed is a method of molding a molded article with the knurled workpiece to impart the inverse of the knurl pattern onto the molded article, such a molded article, a method of forming a structured abrasive article with the molded article, and such an abrasive article.
    Type: Grant
    Filed: September 3, 1997
    Date of Patent: September 7, 1999
    Assignee: 3M Innovative Properties Company
    Inventor: Timothy L. Hoopman
  • Patent number: 5581989
    Abstract: A spinning-machine spindle rotatable about an axis has an upper cop-holding region and a lower nonsmooth reserve surface. The reserve surface is formed as a substantially uniform array of tiny pits separated by a raised continuous land extending as a continuous grid over the surface. Normally the pits are of pyramidal shape and the land lies substantially on a surface of revolution centered on the axis.
    Type: Grant
    Filed: October 28, 1994
    Date of Patent: December 10, 1996
    Assignee: Zinser Textilmaschinen GmbH
    Inventors: Peter Mann, Jakob Bothner, Frieder Probst
  • Patent number: 5557490
    Abstract: The present invention is an apparatus and method for an improved actuator arm assembly in a disc drive. The improvement arises by casting a steel sleeve into the actuator arm to define a pivot bore. A steel bearing and shaft assembly cooperates with the pivot bore to enable the actuator arm to rotate about the shaft. This all steel arrangement minimizes the bearing preload necessary to create a stable actuator arm assembly having a minimum amount of friction in the bearing system.
    Type: Grant
    Filed: July 25, 1994
    Date of Patent: September 17, 1996
    Assignee: Seagate Technology, Inc.
    Inventor: Iraj Jabbari
  • Patent number: 5379019
    Abstract: An apparatus for manufacturing embossed foil for use in controlling the flow of the molten metal tin plating provided in forming laminated tape for use in superconducting magnets utilizing meshing knurling rollers with truncated paramydical elements arranged to provide and embossed pattern for uniform and controlled flow of the tin.
    Type: Grant
    Filed: October 12, 1993
    Date of Patent: January 3, 1995
    Assignee: General Electric Company
    Inventors: Neil G. Fiddes, Christopher G. King, Gerhard S. Kobus, Anthony Mantone, Frank D. Shaffer
  • Patent number: 4899863
    Abstract: A clutch for a cooling fan for a motor vehicle and method of making the same are provided, the clutch comprising a shaft having a knurled portion that press-fittingly receives an inner race member of a bearing, the shaft having a solid ring shaped portion disposed adjacent the knurled portion and being provided with an outer diameter about equal to that of the outer diameter of the knurled portion and having part of the inner race member of the bearing press-fitted thereon whereby the solid ring shaped portion is adapted to block the flow of viscous fluid out of an enclosed chamber of a housing of the clutch by way of the slots which define protuberances of the knurled portion.
    Type: Grant
    Filed: October 21, 1988
    Date of Patent: February 13, 1990
    Assignee: Dayco Products-Eaglemotive, Inc.
    Inventor: David J. Settles
  • Patent number: 4773150
    Abstract: A method of making a control assembly intended for use in manually regulating the operating speed of power equipment in which fine adjustments may be obtained by rotating the control knob and rapid changes in speed may be achieved by shifting the knob axially. The assembly includes an outer one-piece sleeve adapted to be mounted upon an instrument panel or engine housing and permanently joined to a flexible casing containing the operating wire or cable. A plunger assembly is rotatably and slidably received within the sleeve, the plunger assembly including a thin-walled plunger tube of flexible material having a control knob ultrasonically welded to one end of the plunger. The side wall of the plunger tube has a non-circular (preferably oval-shaped) opening through which a retractable follower (ball) protrudes for engaging the internal threads of the sleeve when vernier adjustment is desired.
    Type: Grant
    Filed: May 21, 1987
    Date of Patent: September 27, 1988
    Inventor: Ted W. Gregory
  • Patent number: 4705711
    Abstract: Calender roll comprising a cylindrical metal shaft bearing a polyimide cover, wherein the shaft is knurled to eliminate slippage between the shaft and the cover.
    Type: Grant
    Filed: January 30, 1986
    Date of Patent: November 10, 1987
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Dominic R. Perna
  • Patent number: 4703221
    Abstract: An electric lamp including a glass envelope having at least one conductive foil hermetically sealed within the press-sealed end portion thereof, the foil being electrically connected at one end to a side rod support wire which projects within the envelope's bulb portion to form part of the lamp's filament structure. A sound electrical connection between the support wire and conductive foil is attained by providing the end portion of the support wire with a relatively flat configuration and knurling a surface of this flattened end. This knurled surface, being welded to the foil, provides such a connection without the use of flux or the like. A method of making this lamp is also disclosed.
    Type: Grant
    Filed: April 18, 1986
    Date of Patent: October 27, 1987
    Inventors: Carlos G. Ochoa, German C. Aguilar, Arnold E. Westlund, Jr.
  • Patent number: 4370793
    Abstract: A method and apparatus for coupling two metallic members such as a shaft and a disc. The method includes forming an annular groove on a joint face or outer circumference of the metallic member having greater deformation resistance of the two members, for example, forming uneven portions on the bottom of the groove by knurling or the like. Working the other metallic member, for example, the disc; having smaller deformation resistance near its joint face so that the joint face opposing that of the other causes plastic deformation. Causing a part of the disc to fluidize and flow into the groove, thereby coupling both metallic members together.
    Type: Grant
    Filed: January 3, 1980
    Date of Patent: February 1, 1983
    Assignee: Hitachi, Ltd.
    Inventors: Hisanobu Kanamaru, Moisei Okabe, Hideo Tatsumi, Akira Tohkairin
  • Patent number: 4313248
    Abstract: The invention is concerned with a heat transfer tube for use in boiling type heat exchangers, having an excellent heat transfer performance. More specifically, the invention relates to a surface condition of the heat transfer tube for improving the heat transfer performance and a method of producing the tube easily, especially a method for processing the surface condition efficiently and advantageously from an industrial point of view. The essential feature of the invention resides in a provision of a surface condition for promoting the boiling which consists of annular or spiral cavities extending along the tube surface in the circumferential direction of the latter, as well as narrow gaps extending along the cavities so as to allow the cavities to communicate the outside space. If necessary, spiral or annular fins may be provided on the tube surface, so as to improve the boiling performance at the outside of the tube.
    Type: Grant
    Filed: May 1, 1979
    Date of Patent: February 2, 1982
    Assignee: Fukurawa Metals Co., Ltd.
    Inventor: Jun Fujikake
  • Patent number: 4248915
    Abstract: A process is disclosed for applying a thick inset of an antifriction or a thermosetting resin on a metallic surface, comprising the steps of forming a set of parallel and adjoining grooves on said metallic surface, jumping-up alternately the intergroove ridges in order to extend the anchorage surface for the resin and sintering the resin, such as Teflon, on the metallic surface which has been so prepared.
    Type: Grant
    Filed: June 27, 1979
    Date of Patent: February 3, 1981
    Assignee: Nuovo Pignone S.p.A.
    Inventor: Costantino Vinciguerra
  • Patent number: 4213660
    Abstract: In an axle box structure of soft metal such as aluminum alloy including a bearing bore, a sleeve member of hard metal such as iron pressedly engaged within the bearing bore, and a rolling bearing assembled within the sleeve member to support an axle shaft thereon, the sleeve member has on its outer periphery an axial knurl or serration to be embedded in the axle box structure, the knurl or serration being annularly formed with a predetermined axial length substantially at the central portion of the sleeve member such that the crest diameter of the knurl or serration is larger than the outer diameter of the sleeve member and that the root diameter of the knurl or serration is smaller than the outer diameter of the sleeve member.
    Type: Grant
    Filed: February 12, 1979
    Date of Patent: July 22, 1980
    Assignee: Toyota Jidosha Kogyo Kabushiki Kaisha
    Inventors: Yasuyosi Yasui, Mitugu Izuta, Sigeki Okaguchi
  • Patent number: 4030331
    Abstract: A knurling tool having three knurling wheels adapted to be positioned about a workpiece to be knurled and in which one of these knurling wheels is mounted on a movable block which is adjustably positionable against the workpiece. A quick release mechanism is included which will release the workpiece without affecting the relative working position of the knurling rollers.
    Type: Grant
    Filed: December 27, 1976
    Date of Patent: June 21, 1977
    Inventor: David E. Keasling
  • Patent number: 3962772
    Abstract: A machine element consisting of a shaft having thereon an enlargement such as a gear or cam is made in composite form at a much lower cost in labor and materials than in one-piece form by providing a solid metal supporting shaft of the desired dimensions with a roughened zone, as by coarse-knurling it. A sintered powdered metal preform of suitable metal for the enlargement is prepared in a conventional manner of slightly smaller diameter and of slightly greater length than the finally-desired configuration, and with a central longitudinal bore of slightly larger diameter than the shaft, to allow for expansion of both preform and shaft when both are heated to a forging temperature of F. to F.
    Type: Grant
    Filed: September 4, 1974
    Date of Patent: June 15, 1976
    Assignee: Michigan Powdered Metal Products, Inc.
    Inventor: John Haller
  • Patent number: 3947958
    Abstract: A method of preparing an electrical fitting wherein a knurled wire is inserted into a molded plastic part to provide reliable anchoring of the wire as a lead for a coil form or the like.
    Type: Grant
    Filed: October 11, 1974
    Date of Patent: April 6, 1976
    Assignee: Precision Paper Tube Company
    Inventor: William A. Bowers