Moved By Cam Patents (Class 451/13)
  • Patent number: 8419504
    Abstract: In prior art, an additional radial inward movement that is performed in accordance with a rotating cam disk is imparted on the grinding disk in order to relief-grind the cutting teeth and the chamfer of taps and the cutting teeth of thread formers. The invention relates to a cam disk which can be rotated about an axis and is provided with a control cam. The control cam forms a group of curves according to a large number of possible undercut contours on the grinding teeth of the tap or thread former, which are to be relief-ground. In order to obtain a specific undercut contour on a cutting tooth, a limited angle of rotation is selected from the control cam. The area is mechanically, optically, or electronically scanned by means of a scanning device. To this avail, the cam disk performs an oscillating rotary movement only above the selected section of the control cam.
    Type: Grant
    Filed: February 28, 2007
    Date of Patent: April 16, 2013
    Assignee: Erwin Junker Maschinenfabrik GmbH
    Inventor: Erwin Junker
  • Patent number: 6872124
    Abstract: The superfinishing apparatus according to the present invention includes a frame 51 for holding the entirety of the apparatus, a cam shaft 52 attached to the frame 51 so as to rotate freely, first and second eccentric cams 53, 54 which are attached to the cam shaft 52 and rotate with a phase difference of 180 degrees therebetween, a first vibrator 55 having a polygonal shape in its section which moves in a sliding manner in accordance with the rotation of the first eccentric cam 53, a second vibrator 57 having a polygonal shape in its section which is disposed so as to oppose to the first vibrator 55 through the cam shaft 52 and moves in a sliding manner in accordance with the rotation of the second eccentric cam 54, air bearings 59, 60 for supporting the first vibrator 55 and the second vibrator 57, and a superfinishing stone 61 attached to the first vibrator 55 or the second vibrator 57.
    Type: Grant
    Filed: December 9, 2003
    Date of Patent: March 29, 2005
    Assignee: NSK Ltd.
    Inventors: Kazumi Matsuzaki, Etsuo Kanakubo
  • Publication number: 20010036794
    Abstract: There are provided a lens periphery processing method for an eyeglasses lens, a lens periphery processing machine and lens for eyeglass, in which a V shaped portion that fits strongly in a lens frame of eyeglasses frame, can be processed in such a manner that V shaped portion contact with inside of the V shaped groove of the lens frame so that a contact element does not interfere with a holding means for fixing and holding a lens frame, and even if the V shaped groove shape is measured in a state in which the lens frame is tilted, a difference in size due to holding position between the lens frame and a processed eyeglasses lens does not arise.
    Type: Application
    Filed: April 27, 2001
    Publication date: November 1, 2001
    Inventor: Yoshiyuki Hatano
  • Patent number: 5683288
    Abstract: A patternless edger apparatus is described which is mountable on mechanical pattern ophthalmic lens grinders. The apparatus has a mounting yoke adapted for mounting the apparatus in the place of the mechanical patterns to control the edge grinding of a lens blank. The mounting yoke includes a rotative spindle mount to interlock with the grinder pattern chuck and a mounting shaft releasably receivable in the spring clip bore of such lens grinders. A stored lens pattern and signalling from a grinder spindle rotational angle transducer are acted on by a microprocessor to control a motorized cam operative on the grinder pattern reaction surface to control the grinder to grind a lens blank to a perimeter shape corresponding to the stored lens pattern.
    Type: Grant
    Filed: November 18, 1996
    Date of Patent: November 4, 1997
    Assignee: Elision Technology Inc.
    Inventor: S. Kim Kujawa
  • Patent number: 5562527
    Abstract: A grinding machine for grinding eyeglass lenses includes at least one grinding wheel rotatably mounted on a chassis. A carriage is pivoted to the chassis to pivot about an axis parallel to the rotation axis of the grinding wheel. A support spindle is rotatably mounted on the carriage to rotate about an axis also parallel to the rotation axis of the grinding wheel and which is adapted to receive axially the lens to be ground and a template. A feeler in vertical alignment with the template is mounted on the chassis so that it is movable transversely relative to the pivot axis of the carriage. The feeler comprises a rigid pad and a tactile sensor appropriately attached to the rigid pad, at the surface thereof.
    Type: Grant
    Filed: June 3, 1994
    Date of Patent: October 8, 1996
    Assignee: Essilor International Cie Generale d'Optique
    Inventor: Michel Nauche
  • Patent number: 5476409
    Abstract: A grinding machine has a driving mechanism for rotating a drive shaft, a sander supported on the drive shaft, a bracket provided swingably on a housing for supporting the drive shaft, a drive shaft moving mechanism for moving the drive shaft in the axial direction, a hollow member supported on the bracket for ratably support the drive shaft, a drive shaft position switching mechanism for moving the hollow cylinder in its axial direction to take selectably two positions whereby the drive shaft can take smoothly two positions in one of which the drive shaft is not moved in its axial direction, and in the other of which the drive shaft is moved it its axial direction.
    Type: Grant
    Filed: December 23, 1993
    Date of Patent: December 19, 1995
    Assignee: Ryobi Limited
    Inventors: Tatsuya Wada, Kouichi Miyamoto, Takeshi Shiotani, Shoji Takahashi