Patents by Inventor Lars-Erik Enquist

Lars-Erik Enquist has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 7021871
    Abstract: The invention relates to an indexable milling insert (3) having a polygonal basic shape, comprising four peripheral sides, which meet each other in pairs in one the one hand two acute corners (15), and on the other hand two obtuse corners (16). Between chip surfaces (17) on the top side of the insert and flank surfaces (18) along the peripheral sides, cutting edges (19) are formed, which individually comprise on the hand a major edge portion (20), and, on the other hand, a rounded minor edge portion (21), formed in connection with an acute corner (15).
    Type: Grant
    Filed: January 3, 2002
    Date of Patent: April 4, 2006
    Assignee: Sandvik Intellectual Property Aktiebolag
    Inventors: Peder Arvidsson, Jan Johansson, Lars-Erik Enquist
  • Patent number: 6921234
    Abstract: An indexible cutting insert has a connecting surface formed by alternating parallel ridges and grooves. Each ridge is defined by a pair of flanks which converge in an outward direction. Each ridge includes a convexly curved surface portion for making line contact with a corresponding ridge of a support surface. The convexly curved surface is spaced from outer and inner ends of the respective flank.
    Type: Grant
    Filed: January 3, 2002
    Date of Patent: July 26, 2005
    Assignee: Sandvik AB
    Inventors: Peder Arvidsson, Jan Johansson, Lars-Erik Enquist
  • Publication number: 20040101371
    Abstract: This invention relates to a tool intended for chip removing machining together with a cutting insert therefor. The cutting insert is formed having a connecting surface or serrations that comrises ridges (11) and intermediate grooves. The flanks (18) which delimit the ridge (11) have a convexly curved surface (28), the contact point of which to a co-operating flank (25) of a co-operating ridge consists of a line (G), which extends axially along the length extension of the flank and is situated in an area approximately halfway between on teh one hand an outer transition (19) between the flank (18) and an apex (17) and on the other hand an inner transition (23) between the flank and a groove bottom. The convexley curved surface extends inwards as well as outwards from said contact line (G), in order to guarantee that practical contact between the flanks of the co-operating ridges is attained via surface contact at an indifferent place between the outer and inner limiting edges (29, 30) of the curved surface.
    Type: Application
    Filed: December 3, 2003
    Publication date: May 27, 2004
    Inventors: Peder Arvidsson, Jan Johansson, Lars-Erik Enquist
  • Publication number: 20040071515
    Abstract: The invention relates to an indexable milling insert (3) having a polygonal basic shape, comprising four peripheral sides, which meet each other in pairs in one the one hand two acute corners (15), and on the other hand two obtuse corners (16). Between chip surfaces (17) on the top side of the insert and flank surfaces (18) along the peripheral sides, cutting edges (19) are formed, which individually comprise on the hand a major edge portion (20), and, on the other hand, a rounded minor edge portion (21), formed in connection with an acute corner (15).
    Type: Application
    Filed: December 3, 2003
    Publication date: April 15, 2004
    Inventors: Peder Arvidsson, Jan Johansson, Lars-Erik Enquist
  • Patent number: 6619892
    Abstract: A positional adjusting mechanism for a cutting insert in a tool for chip removing machining, preferably a milling cutter. The positional adjusting mechanism includes a hole formed in the tool body adjacent to the cutting seat which receives the cutting insert. A slotted bushing is mounted in that hole. An adjusting screw is received in the bushing to expand an upper end of the bushing. In the mounted state of the bushing in its hole, contact occurs between an upper part of the bushing and a support surface of the tool body which urges the bushing laterally in its hole to eliminate lateral play and thus stabilizes the bushing.
    Type: Grant
    Filed: June 27, 2001
    Date of Patent: September 16, 2003
    Assignee: Sandvik AB
    Inventor: Lars-Erik Enquist
  • Publication number: 20020053266
    Abstract: A positional adjusting mechanism for a cutting insert in a tool for chip removing machining, preferably a milling cutter. The positional adjusting mechanism includes a hole formed in the tool body adjacent to the cutting seat which receives the cutting insert. A slotted bushing is mounted in that hole. An adjusting screw is received in the bushing to expand an upper end of the bushing. In the mounted state of the bushing in its hole, contact occurs between an upper part of the bushing and a support surface of the tool body which urges the bushing laterally in its hole to eliminate lateral play and thus stabilizes the bushing.
    Type: Application
    Filed: June 27, 2001
    Publication date: May 9, 2002
    Inventor: Lars-Erik Enquist
  • Patent number: 6086290
    Abstract: A milling tool includes a rotatable supporting body having detachable cassettes upon which cutting inserts are mounted. The cutting inserts are provided with cutting edges. Two serrated surfaces are provided in order to connect the individual cassette with the supporting body. A first of the two serrated surfaces is located upon the periphery of the supporting body and faces outwards from the supporting body, while the other serrated surface is formed at an inner side of the cassette.
    Type: Grant
    Filed: October 14, 1998
    Date of Patent: July 11, 2000
    Assignee: Sandvik AB
    Inventors: Ingemar Qvarth, Lars-Erik Enquist
  • Patent number: 6004080
    Abstract: A milling tool includes a supporting body that is rotatable around a central axis, and is being equipped with detachable cutting inserts. Each insert has two cutting edges extending at a given setting angle relative to each other. One of the cutting edges is located in a reference plane oriented perpendicular to the axis of rotation. In order to directly or indirectly connect each cutting insert with the supporting body a pair of serrated surfaces are provided, each of the serrated surfaces consisting of oblong, parallel ridges that are separated by grooves. A first one of the serrated surfaces is located at an inner side of the cutting insert, and the other one being directly or indirectly associated with the supporting body. The ridges and the grooves of the serrated surfaces are relative to the reference plane by an angle that constitutes one-half of the setting angle.
    Type: Grant
    Filed: October 14, 1998
    Date of Patent: December 21, 1999
    Assignee: Sandvik AB
    Inventors: Ingemar Qvarth, Lars-Erik Enquist