By Sweep Cutter Patents (Class 144/24)
  • Patent number: 9573284
    Abstract: A method and apparatus for forming a starter notch along the length of a work-piece for subsequent fatigue testing. The starter notch is formed with a cutting wire such that it will promote fatigue-cracking in the work-piece in one defined direction and avoids cracking in directions other than the length direction of the starter notch. Improved fatigue-testing analysis may therefore be realized.
    Type: Grant
    Filed: January 15, 2014
    Date of Patent: February 21, 2017
    Assignee: SOUTHWEST RESEARCH INSTITUTE
    Inventors: Clinton J. Thwing, Don E. Mahoney
  • Patent number: 6918720
    Abstract: A circle forming apparatus (100) for a power tool and a method for using the apparatus provides for the formation of circles or circular apertures in a workpiece. A first arm (104) and second arm (106) are rotatably coupled, and a fastener allows a user to secure the first arm relative to the second arm. The second arm includes a pivot point (108), and the first arm includes means (102) for coupling the first arm to a power tool.
    Type: Grant
    Filed: August 10, 2001
    Date of Patent: July 19, 2005
    Assignee: Credo Technology Corporation
    Inventors: Jason R. Kopras, Cory R. Boudreau, Douglas Seals
  • Patent number: 6419428
    Abstract: A circular hole cutting device (1) for making a circular hole in an object comprises a bit holder (3) which can be attached to a drive shaft of an electric power tool in such a way that the bit holder (3) with a bit (2) attached to a far end of the bit holder (3) rotates together with the drive shaft on a common axis, a cover (4) which is fitted to the bit holder (3) relatively rotatably about its axis, and a radial rod (5) attached to the cover (4) such that the amount of projection of the radial rod (5) in a direction intersecting the bit (2) can be varied. The physical size of the cover (4) is determined such that the bit (2) projects from a far end of the cover (4). The radial rod (5) has a pivot shaft (52) having a pointed end formed by bending a terminal part of the radial rod (5) approximately at right angles.
    Type: Grant
    Filed: December 12, 2000
    Date of Patent: July 16, 2002
    Assignee: House B.M. Co., Ltd.
    Inventors: Kunio Ajimi, Akihito Uemura
  • Patent number: 5486076
    Abstract: The invention concerns a radius-milling fixture for machining workpieces by means of a hand-held router. The fixture has a rectangular support (1), made preferably of plexiglas, which has a support surface designed to accommodate the hand-held router. The support (1) has a slot in which a fastening device (31, 32) can slide. The fastening device (31, 32) is fitted with a bolt which can be inserted in a bore in the workpiece (40) to be machined. Tightening the fastening device locks the bolt in place relative to the support (1).
    Type: Grant
    Filed: August 10, 1994
    Date of Patent: January 23, 1996
    Inventor: Bernhard Hauschopp
  • Patent number: 4645390
    Abstract: The rotary cutting tool is used for making holes in walls of thermoplastic materials, e.g. fuel tanks produced by the blowing process. Cutting blades pointing roughly in the axial direction are placed on the free end face of a circular, rotary tool member and said cutting blade score and displace, instead of cutting the material. The cutting blades are arranged at a drawing angle to the axial direction and slope to the inside or outside, depending on whether a burr is or is not required on the opening edge. A holding device in the form of a mandrel or pin ensures that the cut out circular disk does not drop into the container. Thus, a cut is made, which is suitable for further processing by welding on connections or fitting seals and produces no chips and waste which could fall into the container.
    Type: Grant
    Filed: March 18, 1985
    Date of Patent: February 24, 1987
    Assignee: bielomatik Leuze GmbH & Co.
    Inventors: Ernst Pecha, Rudolf Trost, Rudi Gneiting, Karl-Eberhard Dieterich
  • Patent number: 4602434
    Abstract: A circular sawblade useful in cutting circular figures from a planar material utilizing a power source to rotate the sawblade where the blade has a selected degree of concativity to accommodate the radius of the circular figure to be cut from the planar material. The present invention further comprehends a saw device to mount the blade for rotation where the cutting plane of the material can be selectively adjusted with respect to the degree of concativity of the sawblade to selectively adjust the angle between the surface cut by the blade and the planar surface of the material.
    Type: Grant
    Filed: January 17, 1983
    Date of Patent: July 29, 1986
    Inventor: Hugh D. Stradling
  • Patent number: 4397207
    Abstract: A self-contained sheet metal cutter is mounted on a wheeled dolly and includes upper and lower power driven shear cutting wheels between which is engaged the plate or sheet to be cut. An adjustable trammel assembly extends from the dolly and includes a center point member engageable with an aperture in the plate to be cut and which corresponds to the center of the arc or circle. The trammel is adjustable to the radius of the arc or circle and the center point is engaged with the aperture in the sheet whereupon the wheeled dolly is pushed manually around the arc or circle as the shear wheels cut the sheet to the preset radius arc or circle. The rear wheel of the dolly is castor so that it follows the track readily and easily.
    Type: Grant
    Filed: December 1, 1980
    Date of Patent: August 9, 1983
    Inventor: Dalton Isaac
  • Patent number: 4295763
    Abstract: A cutter for use in making plugs of wood or the like to be used in the insulation industry for plugging holes made in order to provide insulation in an existing structure. The cutter is adapted to be held in a chuck or the like for rotation about a central axis defined by a holder, with a pilot being spring biased in the holder and having a centering tit for locating the wooden plug as it is being cut. Four steel cutters are provided in circumaxially spaced relationship around the axis, and two of these are oriented at a slightly different angle than the other two such that the plug can be cut with two distinct tapers, such that the steeper plug taper permits the plug to be first located in the hole to be plugged, and a shallower slightly larger diameter tapered portion for securing the plug in the hole. Each cutter is adjustable in the holder, and is held in place by a screw with any number of shims being provided in order to cut plugs of different size.
    Type: Grant
    Filed: May 29, 1979
    Date of Patent: October 20, 1981
    Inventor: James J. Cunniff