Radially Inward Distortion Patents (Class 411/277)
  • Patent number: 11760151
    Abstract: A suspension device for electric vehicle includes a pair of hollow members each connected to an elastic body configured to suspend a vehicle body of the vehicle, the pair of hollow members each configured to house, in an internal space of the hollow member, part of an associated one of a pair of drive shafts, a beam member joined to the pair of hollow members, and at least one of a hollow member joint portion or a beam member joint portion having a projecting portion, the hollow member joint portion constituting a side surface of each of the hollow members, the beam member joint portion constituting a side surface of an end portion of the beam member, the other one of the hollow member joint portion or the beam member joint portion having a recessed portion.
    Type: Grant
    Filed: October 9, 2020
    Date of Patent: September 19, 2023
    Assignee: Daimler Truck AG
    Inventors: Maki Ito, Chockalingam Hariharan
  • Patent number: 11491525
    Abstract: To suppress occurrence of stress corrosion cracking in a weld due to tensile residual stress generated in a web or a middle rib in case of bend forming of an aluminum alloy extrusion having the weld on the web or/and the middle rib. In bend forming of the aluminum alloy extrusion, a peak position of tensile residual stress generated in the middle rib exists in a region other than the vicinity of the weld. Since the peak position is away from the weld by a distance, tensile residual stress in the weld is reduced, making it possible to suppress occurrence of stress corrosion cracking.
    Type: Grant
    Filed: February 28, 2020
    Date of Patent: November 8, 2022
    Assignee: Kobe Steel, Ltd.
    Inventors: Koki Sugino, Masatoshi Yoshida
  • Patent number: 11298202
    Abstract: Apparatus and methods provided to remove biopsy specimens from bone and/or associated bone marrow. A powered driver may rotate a biopsy needle at an optimum speed to obtain the biopsy specimen. A thread or a groove may be disposed on interior portions of the biopsy needle. The thread or groove may engage a biopsy specimen and enhance removal of a bone marrow core from cancellous bone. Manufacturing procedures are provided for bonding a single helical thread with interior portions of the biopsy needle. The apparatus may also include a biopsy sample ejector and/or ejector funnel. A biopsy needle set may include a cannula and a trocar with respective tips having optimum configurations, dimensions and/or orientations relative to each other to optimize penetration of a bone and/or bone marrow with minimum patient trauma and enhanced reliability of obtaining a biopsy specimen.
    Type: Grant
    Filed: June 6, 2017
    Date of Patent: April 12, 2022
    Assignee: TELEFLEX LIFE SCIENCES LIMITED
    Inventors: Larry J. Miller, David S. Bolleter, Robert W. Titkemeyer, Christopher Brian Kilcoin, Bradford Hughes Craig
  • Patent number: 11220193
    Abstract: A device for adjusting the length of the seating portion of a motor vehicle seat, the seating portion comprising a movable seating part, the adjustment device comprising a threaded rod, a rotating nut, and a housing receiving the nut and the threaded rod, the threaded rod comprising a first end in connection with the movable seating part and a second end opposite the first end, the threaded rod and the nut cooperating in rotation to move the movable seating part, wherein the nut comprises a nut weakness area for the breaking of said nut.
    Type: Grant
    Filed: April 13, 2020
    Date of Patent: January 11, 2022
    Assignee: FAURECIA Sièges d'Automobile
    Inventor: Dominique Folliot
  • Patent number: 11204119
    Abstract: A connection device for a fluid line, which has a connection unit that can be fixed in an internally threaded fastening opening of a carrier component by means of an externally threaded section of a fastening element, said threaded section consisting of a rubber elastic material. An insertion opening extends through the connection unit and the fluid line to be connected can be inserted therein so that it projects through an annular retaining element fixed in the fastening element and is retained. The external thread of the threaded section is surrounded by at least one annular outer sealing bead which is an integral part of the threaded section, said sealing bead improving the sealing with respect to the internal thread.
    Type: Grant
    Filed: November 14, 2017
    Date of Patent: December 21, 2021
    Assignee: FESTO SE & CO. KG
    Inventor: Martin Weiss
  • Patent number: 11111947
    Abstract: An interlocking thread with a tooth-cross-section that is wider at its crest than at its root and with “V” angles located both along the crest and the root which tightens into a tapped hole that has a similar thread cross-section.
    Type: Grant
    Filed: August 20, 2018
    Date of Patent: September 7, 2021
    Assignee: LOCK-N-STITCH, INC.
    Inventor: Gary Jack Reed
  • Patent number: 10989245
    Abstract: An improved fastener comprising a fastener body having a tool-engaging portion, a threaded fastening portion and a shroud-receiving body portion; a shroud concentrically mounted on the shroud-receiving body portion and having an inner surface facing an outer surface of the shroud-receiving body portion; the inner surface of the shroud comprising an annular groove and the shroud-receiving body portion comprising a substantially arch-shaped axially-buckled radially-extending annular protrusion extending outwardly transverse to the central axis and disposed in the annular groove of the shroud; and the annular protrusion and annular groove of the shroud forming a shroud-retaining element restraining the shroud from movement in at least a first axial direction along the central axis such that the shroud will rotate relative to the fastener body under an applied external torque prior to the fastener body rotating when the fastener is engaged with an external structure at a design installation torque.
    Type: Grant
    Filed: March 25, 2019
    Date of Patent: April 27, 2021
    Assignee: McGard LLC
    Inventors: Dustin D. Bielecki, Daniel Tornow, Dillon Jones, David C. Meyer
  • Patent number: 10520077
    Abstract: A gear selection shift lever device for a vehicle is presented, which comprises a housing and an attachment device connected to the housing, wherein the housing has a cover surface, on which a shift lever can be or is disposed, and wherein the attachment device connected to the housing has a shaft and an eccentric disk coupled to the shaft, wherein a center of the eccentric disk lies outside the shaft axis of the shaft, wherein the attachment device is designed to connect the gear selection shift lever device to a mount for the gear selection shift lever device that can be or is attached to the vehicle, when the eccentric disk is moved about the shaft axis.
    Type: Grant
    Filed: June 9, 2015
    Date of Patent: December 31, 2019
    Assignee: ZF Friedrichshafen AG
    Inventor: Alex Hessel
  • Patent number: 10342582
    Abstract: Various exemplary methods and devices are provided for fixing bone anchors to bone. In general, the methods and devices can allow for a bone anchor to be fixed to a bone at a desired angle to a receiver member. In an exemplary embodiment, a bone anchor assembly is provided that includes a bone anchor configured to engage bone, a receiver member that seats a spherical head of the bone anchor and a spinal fixation element, a compression member seated within the receiver member, proximally of the head of the bone anchor, and a closure mechanism seated within the receiver member, proximally of the compression member. One or more of the receiver member, the compression member, and the closure mechanism can have gripping features thereon configured to secure the bone anchor and/or the spinal fixation element within the receiver member, thereby reducing a risk of slippage of the bone anchor and/or the spinal fixation element with respect to the receiver member.
    Type: Grant
    Filed: November 4, 2013
    Date of Patent: July 9, 2019
    Assignee: DePuy Synthes Products, Inc.
    Inventors: Frank Spratt, Philip A. Cormier, Ernest Quintanilha, Sara Dziedzic, Nicholas Pavento, Derek Shaw, Thibault Chandanson
  • Patent number: 10272769
    Abstract: A mounting structure of an air intake apparatus includes an air intake apparatus including a first mounting portion made of resin and a second mounting portion made of resin, a first collar member made of metal positioned within a first mounting bore at the first mounting portion, a second collar member made of metal positioned within a second mounting bore at the second mounting portion, and a large diameter annular portion made of metal provided between the first and second collar members, the first collar member, the large diameter annular portion and the second collar member being fastened while making contact with one another in a state where the first mounting portion and the second mounting portion are fastened together relative to the cylinder head by a fastening member inserted to be positioned within the first collar member, the large diameter annular portion and the second collar member.
    Type: Grant
    Filed: September 14, 2017
    Date of Patent: April 30, 2019
    Assignee: AISIN SEIKI KABUSHIKI KAISHA
    Inventor: Yasuhiko Esaki
  • Patent number: 9534376
    Abstract: A high-strength laser configured column anchor and anchoring system is disclosed. The high-strength column anchor provides high-strength pullout resistance when embedded within the wall bed joint. Specially-configured apertures, edging and dimension restrictions provide for flow-through mortar embedment within the wall bed joint. The edging provides irregular and regular patterns ensuring a secure fit within the bed joint. The column anchors include a hook attachment portion for secure attachment to the column flanges and optionally include a securement bar or clamp to further secure the column anchor to the column flanges.
    Type: Grant
    Filed: December 8, 2014
    Date of Patent: January 3, 2017
    Assignee: Columbia Insurance Company
    Inventors: Ronald P. Hohmann, Jr., Ronald P. Hohmann
  • Patent number: 9260857
    Abstract: A fail-safe wall anchor for cavity walls includes a wingnut including receptors for receiving pintles of a veneer tie. Thermally insulative material is provided to inhibit transfer of heat from the veneer tie to the wall anchor. Back up structure is provided in the event the thermally insulative material fails to maintain the structural connection between the wall anchor and the veneer tie.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: February 16, 2016
    Assignee: Columbia Insurance Company
    Inventor: Ronald P. Hohmann, Jr.
  • Patent number: 9212686
    Abstract: Disclosed herein is a prevailing torque nut (10) comprising a body (12) having a longitudinal opening (14) extending therethrough. The body has a hexagonal outer surface (16) and an inner surface (18) defining the opening (14). A female thread (20) is formed on the inner surface and extends from one longitudinal end to an opposite longitudinal end of the opening (14). The thread (20) has a constant depth along its entire length, is of helical configuration along its entire length, and tapers radially inwardly in diameter at one end of the opening (14).
    Type: Grant
    Filed: March 11, 2013
    Date of Patent: December 15, 2015
    Assignee: ACTEURO LIMITED
    Inventor: Peter Howard
  • Patent number: 9115745
    Abstract: In order to improve a securing nut comprising a base member which is provided around its circumference with a key face contour, a threaded bolt receptacle which is provided with an internal thread and passes through the base member in the direction of a central axis as well as at least one clamping element which is provided on the base member, in such a manner that it is, on the one hand, simple to produce and, on the other hand, allows reliable clamping without damaging the threaded bolt it is suggested that the clamping element be a collar which is arranged on one side of the base member and in which the internal thread is continued, and that the collar extend around the threaded bolt receptacle in an essentially closed manner in circumferential direction with respect to the central axis.
    Type: Grant
    Filed: January 5, 2010
    Date of Patent: August 25, 2015
    Assignees: Metallwarenfabrik Hermann Winker GmbH & Co. KG, AUDI AG
    Inventors: Guenther Messmer, Alexander Steigerwald, Peter Unseld
  • Patent number: 8851462
    Abstract: A woodworking machine includes a base, an adjusting device, and an adjustable worktable. The adjusting device is engaged with the base and includes a platform, a plurality of adjusters, and a plurality of fastening members. The platform is slidably engaged with the base. The plurality of adjusters are adjustable, and the plurality of fastening members are releasably inserted through the plurality of adjustors respectively. The adjustable worktable is engaged with the adjusting device. Moreover, the platform bears the adjustable worktable and the plurality of adjusters are abutted against the adjustable worktable. Additionally, the adjustable worktable is adjustably moved upon adjusting of the adjustors, and prior to adjusting each adjustor, the fastening member engaged therewith is removed.
    Type: Grant
    Filed: January 17, 2011
    Date of Patent: October 7, 2014
    Inventor: James Liu
  • Patent number: 8087863
    Abstract: A screw nut from a metal material, which comprises a tapped hole and an inner groove which radially extends in relation to the longitudinal axis thereof. An annular collar is formed onto one of the faces of the screw nut and its cross-section is bent in the direction of the axis to such a degree as to delimit, together with a section of the face surrounding the tapped hole as a contact surface, a receiving slot that is directly associated therewith.
    Type: Grant
    Filed: December 21, 2006
    Date of Patent: January 3, 2012
    Inventor: Hartmut Flaig
  • Patent number: 7976257
    Abstract: A profile rail has a face and is formed with a longitudinally extending channel open at the face and with longitudinally extending stabilizing formations on the face flanking the channel. The channel has confronting ribbed flanks. A stabilizing element has a face engageable with the face of the rail and formed with a pair of stabilizing formations fittable with the stabilizing formations of the rail and with a throughgoing hole between the respective stabilizing formations and aligned with the channel when the element stabilizing formations are fitted with the rail stabilizing formations. A screw fittable through the hole has a screwthread engageable with the flanks of the channel so that the screw can clamp the element to the face of the rail.
    Type: Grant
    Filed: February 11, 2008
    Date of Patent: July 12, 2011
    Assignee: Ideematec Deutschland GmbH
    Inventor: Johann Kufner
  • Publication number: 20090169328
    Abstract: The object of the invention is to provide a fixing implement which fulfills an excellent looseness prevention function while firmly fastening a member using an irreversible looseness prevention device, which is excellent in durability, workability when fixing the member and corrosion resistance and which can firmly fastens the member without increasing the number of component parts.
    Type: Application
    Filed: June 15, 2006
    Publication date: July 2, 2009
    Inventors: Masao Suzuki, Eiji Ikeda
  • Patent number: 7128514
    Abstract: A clip has a retainer for securing the clip and a wire harness to a bolt protruding from a vehicle surface. The retainer includes a beam having an aperture with an inner wall. The aperture receives the bolt. A flange projects into the aperture from the wall. An opening in the wall opposite the flange communicates with a passage in the beam. A sliding component of the retainer has a flanged end for insertion into the passage and through the beam into the aperture. The flange and the flanged end of the component are received between selected threads of the bolt to clamp the bolt in the aperture. Projections extending from opposite edges of the sliding component are received in cavities along side walls of the beam passage in positions corresponding to the size of the bolt. The projections and cavities cooperate to secure the sliding component in the beam.
    Type: Grant
    Filed: April 8, 2005
    Date of Patent: October 31, 2006
    Assignee: Yazaki North America, Inc.
    Inventor: Howard Stephen Le Beau
  • Patent number: 7011481
    Abstract: The present invention concerns a securing nut (1) with a nut body (5) and a straining ring (4) that is arranged on the nut body (5) and able to turn, the straining ring (4) being shoved onto a neck (2) of the nut body (5) and secured by clamping. According to the invention, the inner surface of the straining ring (4) has at least two grooves in the form of circular splines (10a, 10b, 10c), they extend across the entire angle region of 360°, and the outer surface of the neck (2) has the same number of cams in the form of spline profiles (20a, 20b, 20c), which extend across an angle range of less than 360°.
    Type: Grant
    Filed: November 26, 2001
    Date of Patent: March 14, 2006
    Inventor: Alexander Winker
  • Patent number: 6386808
    Abstract: It is an object of the invention to provide a structure of an internal thread portion for preventing looseness which structure allows a reduction in the torque required for the threaded engagement with an external-thread member and prevents a seizure. An exit end portion of a self-locking nut is taperingly contracted over the entire circumference thereof so as to form a contracted internal thread portion having a conical section. In addition, ridges of the contracted internal thread portion are provided with corrugation continuing circumferentially. The diameter of an inscribed circle which links the extremities of projections in the corrugation is smaller than the minor diameter of the external-thread member which is to be engaged threadedly with the internal thread portion.
    Type: Grant
    Filed: September 27, 2001
    Date of Patent: May 14, 2002
    Assignee: Sugiura Seisakusho Co., Ltd.
    Inventors: Naoyuki Fujii, Keiji Nomura
  • Patent number: 6364588
    Abstract: It is an object of the invention to provide a structure of an internal thread portion for preventing looseness which structure allows a reduction in the torque required for the threaded engagement with an external-thread member and prevents a seizure. An exit end portion of a self-locking nut is taperingly contracted over the entire circumference thereof so as to form a contracted internal thread portion having a conical section. In addition, ridges of the contracted internal thread portion are provided with corrugation continuing circumferentially. The diameter of an inscribed circle which links the extremities of projections in the corrugation is smaller then the minor diameter of the external-thread member which is to be engaged threadedly with the internal thread portion.
    Type: Grant
    Filed: July 21, 1998
    Date of Patent: April 2, 2002
    Assignee: Sugiura Seiksakusho Co., Ltd.
    Inventors: Naoyuki Fujii, Keiji Nomura
  • Patent number: 6276884
    Abstract: The invention relates to a threaded pairing, consisting of the assigned threaded parts, for the transmission of axial forces, where the screw thread (5) is filled with the sealing compound (6). The task is to create an axially positionable threaded pairing capable of being turned, a joint which at the same time is sufficiently rigid (by means of frictionally connected flanks) and leak-proof (by filling the positively fitting screw thread with sealing compound (6)).
    Type: Grant
    Filed: November 24, 1999
    Date of Patent: August 21, 2001
    Assignee: Buemach Engineering International B.V.
    Inventor: Josef Bueter
  • Patent number: 6132153
    Abstract: A lock nut having a body member with a threaded axial bore and a washer having an axial opening coupled to a bottom end portion thereof so that the opening of the washer is aligned substantially with the threaded axial bore. The washer has one or more fingers with threaded finger tip portions partially defining the opening thereof. The threaded finger tip portions of the washer are in-phase helically with the threaded axial bore of the body member. A recess is disposed between the washer and the body member, and a protruding portion of the washer extends from the bottom end portion of the body member.
    Type: Grant
    Filed: September 2, 1999
    Date of Patent: October 17, 2000
    Assignee: Illinois Tool Works Inc.
    Inventors: Kenneth R. LeVey, Ned J. Gruca
  • Patent number: 6050764
    Abstract: A measuring device is provided, having a cylindrical connection piece (1), having a collar (2) which engages around at least one section of the connection piece (1) and is to be fastened at a measuring location, having a restraining means, by which the connection piece (1) is fastened in the collar (2), having an annular seal (3), which is arranged in the collar (2) and bears in a sealing manner against the connection piece (1), and having a thrust ring (4) which is releasably fastened in the collar (2), and, in an end position, puts the seal (3) under pressure in the axial direction, with which device mounting and demounting at the measuring location take place in one operation and with which device, during mounting, the fastening of the connection piece (1) takes place before or at the same time as the restraining of the seal (3), and with which device, during demounting, first of all the seal (3) is released and then the fastening.
    Type: Grant
    Filed: September 30, 1997
    Date of Patent: April 18, 2000
    Assignee: Endress + Hauser GmbH + Co.
    Inventors: Klaus-Peter Oberle, Markus Mornhinweg
  • Patent number: 5915902
    Abstract: A lock nut threadably engageable and lockingly retainable about a threaded shaft extending through a workpiece, the lock nut having at least one deformable slot disposed on a side portion thereof and disposed transversely relative to the lock nut bore axis, the lock nut also having a nut deforming member protruding from a bottom end thereof, wherein at least a portion of the nut deforming member is in substantial axial alignment with the deformable slot. The lock nut is undeformed prior to installation thereof about the threaded shaft. The nut deforming member is engageable with the workpiece to deform the lock nut upon threadably installing the lock nut about the threaded shaft, thereby retaining the lock nut thereabout, whereby the lock nut has a relatively consistent torque performance with reduced statistical spread over several installation and removal cycles of the nut about the threaded shaft.
    Type: Grant
    Filed: September 19, 1997
    Date of Patent: June 29, 1999
    Assignee: Illinois Tool Works Inc.
    Inventors: John Patterson, Nandan R. Mehta
  • Patent number: 5827027
    Abstract: A nut free from inadvertent loosening has an annular lug with a plurality of generally upright grooves formed in an outer peripheral surface of the annular lug at angular intervals so as to divide the annular lug into a plurality of wall segments. Each wall segment is interposed between two upright grooves. At least one of the wall segments is depressed centripetally to reduce its radius, with the other segments remaining undepressed. The annular lug is integral and coaxial with a base which is engageable with a driver. An internally threaded bore is formed through the nut around a central axis thereof. The annular lug provides an upper zone of the internally threaded bore. The internal thread is continuous from end to end and is not intersected by the vertical grooves. The inner radius of each depressed wall segment is less than the inner radius of the undepressed wall segments. The outer radius of each depressed wall segment may be greater than or less than the outer radius of the undepressed wall segments.
    Type: Grant
    Filed: June 6, 1997
    Date of Patent: October 27, 1998
    Assignee: Hard Lock Kogyo Co.
    Inventor: Katuhiko Wakabayashi
  • Patent number: 5702217
    Abstract: Screw or nut braking rings and mountings established with the rings include a nut having an upper portion hollowed from a circular throat. Slits divide the upper portion into blocks by cutting the throat. A shape-memory alloy ring is housed in the throat so as to retighten the blocks on the threaded portion of the mounting and thus tighten it. The ring exhibits a change between the tightening state and a mounting state where it is free in the throat and can be easily mounted.
    Type: Grant
    Filed: June 15, 1995
    Date of Patent: December 30, 1997
    Assignee: Societe Nationale d'Etude et de Construction de Moteurs d'Aviation "Snecma"
    Inventors: Jean-Louis Charbonnel, Michel Franchet, Jacky Serge Naudet
  • Patent number: 5528951
    Abstract: A linear actuator using a screw mechanism is provided which can be made free from play and can operate in a smooth fashion without involving any unacceptably rigorous tolerance control. An external thread of a screw rod is in threading engagement with an internal thread of a nut member for converting a rotational movement of the nut member into a linear movement of the screw rod, and a localized region of relatively tight fit is provided in the threading engagement. In particular, when the nut member is made of a molded plastic member, the localized region of relatively tight fit can be easily formed by grinding or cutting a part of the molding core for molding the internal thread of the nut member.
    Type: Grant
    Filed: May 4, 1994
    Date of Patent: June 25, 1996
    Assignee: Mitsuba Electric Manufacturing Co., Ltd.
    Inventors: Yoshikazu Takahashi, Masayuki Tamura
  • Patent number: 5123793
    Abstract: A locking nut is provided by forming a straight cylindrical bore through a body, forming a tap with uniform teeth, the tips of which taper at a shallow angle toward one end of the tap, and tapping said bore with said tap so as to produce a thread having a pitch diameter and a root diameter which taper from one of the thread to the other, and a crest which is of constant diameter and increasingly truncated from one end to the other, said thread at said one end having substantially a full profile.
    Type: Grant
    Filed: January 29, 1991
    Date of Patent: June 23, 1992
    Assignee: Deutsch Fastener Corporation
    Inventor: James L. Bonstein
  • Patent number: 5092726
    Abstract: Wrenching lobes of an internally threaded nut are separated by circumferential, tapered walls so that the lobes and contiguous portions of the walls deform in radial compression upon reaching a predetermined preload and displace radially inwardly while the central portions of the walls deform radially outwardly, but do not interfere with the tool that sets the nut.
    Type: Grant
    Filed: July 21, 1989
    Date of Patent: March 3, 1992
    Assignee: VSI Corporation
    Inventors: Roland A. Wheeler, Peter M. Downie
  • Patent number: 5033924
    Abstract: An improved lock nut of the kind having a deformable section at one end, with a generally elliptical cross-section. The deformable section has a maximum radial thickness in the region of the ellipse's minor axis, to provide a desired degree of frictional locking when threaded onto a bolt, and it has a minimum radial thickness in the region of the ellipse's major axis, to reduce stresses and plastic deformation that could otherwise adversely affect the lock nut's reusability.
    Type: Grant
    Filed: December 12, 1989
    Date of Patent: July 23, 1991
    Assignee: VSI Corporation
    Inventor: Frank J. Cosenza
  • Patent number: 5011352
    Abstract: A fastener includes a threaded pin and an internally threaded collar. The threads can freely be run without impediment during tightening. After the fastener is tightened, a tool engages a shoulder on the collar and presses a deflector against the collar on the pin to deflect it so as to form a lock against loosening.
    Type: Grant
    Filed: September 8, 1989
    Date of Patent: April 30, 1991
    Assignee: Hi-Shear Corporation
    Inventor: Edwin E. Hatter
  • Patent number: 4759237
    Abstract: A self-locking nut is provided having, at its periphery, a number of longitudinal channels (3) with semi-circular section intended to cooperate with drive balls carried by an appropriate tightening tool, said balls causing, at the end of tightening, the formation of a circular groove (10) by forcing back the metal situated between the channels (3), which results in radial deformation of the inner threads of the nut (1) at the level of said groove (10).
    Type: Grant
    Filed: December 18, 1986
    Date of Patent: July 26, 1988
    Inventors: Christian R. Fauchet, Reynald Rousselle
  • Patent number: 4682520
    Abstract: Disclosed is a mechanically lockable fastener assembly for maintaining workpieces assembled, when an elongated bolt with threads formed along a length thereof, and substantially axially aligned rotation resisting surfaces formed along another length thereof, is mechanically assembled with a cooperating nut having a threaded portion and a compressible portion deformable into engagement with said rotation resisting surfaces of said bolt to cause the bolt and the nut of the assembly to be inseparable by untorqued unthreading.
    Type: Grant
    Filed: November 15, 1984
    Date of Patent: July 28, 1987
    Assignee: Northrop Corporation
    Inventor: Warren E. Gray
  • Patent number: 4254809
    Abstract: A two-piece rivet assembly comprising a shank member and a collar. The shank member includes a head, a cylindrical shank, and a helical thread with a substantially constant pitch, but with a crest diameter which decreases as it extends away from a maximum adjacent to its end farthest from the shank. The ring-like collar has an inner wall, an outer wall, and a first and a second end. The inner wall defines a passage between the ends to receive at least a portion of the thread. With the shank placed in an aperture in a workpiece with at least a portion of the thread projecting beyond a surface of the workpiece, the collar is placed over the thread and a swaging setting force is applied. This force applies both axial and radial components to the collar. This forces the collar against a surface of the workpiece and swages the wall into the thread at its maximum diameter and then continuously along the thread, exerting a tensile force on the shank member.
    Type: Grant
    Filed: September 11, 1978
    Date of Patent: March 10, 1981
    Assignee: Hi Shear Corporation
    Inventor: Michael M. Schuster