Patents Assigned to Mapal
  • Patent number: 5904452
    Abstract: A chip removal tool for finishing the radial surface of a bore and having a cylindrical bit for mounting a cutting element and a deflector positioned adjacent the cutting element to deflect chips cut from the bore and urging the chips into a flow of fluid from respective cooling and lubricating sources.
    Type: Grant
    Filed: February 6, 1997
    Date of Patent: May 18, 1999
    Assignee: Mapal Fabrik Fur Prazisionswerkzeuge
    Inventor: Dieter Kress
  • Patent number: 5865573
    Abstract: A boring bar for machining of borehole surfaces which are arranged axially spaced from each other, in particular crank-shaft and/or cam-shaft bearing holes. The bar has at least one, and preferably a plurality, of cutting devices and at least one, and preferably a plurality of, guide devices each associated with a cutting device. A fluid pressure actuating device acts on both the cutting devices and the guide devices. The actuating device effects a setting movement of each of those devices against a respective defined stop by application of fluid pressure through the boring bar to the cutting devices and the guide devices.
    Type: Grant
    Filed: October 30, 1996
    Date of Patent: February 2, 1999
    Assignee: Mapal Fabrik fur Prazisionswerkzeuge
    Inventor: Dieter Kress
  • Patent number: 5865572
    Abstract: A tool is proposed for the machining treatment of bore surfaces, consisting of at least two component tools that can be displaced with respect to each other, both of which are provided with machining arrangements, wherein an inner component tool is guided inside an outer component tool, in that the tool (1) comprises a primary piston (13) that--for the purpose of carrying out an extended movement of the inner component tool (7)--can be charged with a certain medium under pressure, in that the primary piston (13) during the extended movement of the inner component tool (7) displaces a medium via a connection channel (25) into an equalizing chamber (27), and in that the equalizing chamber (27) is in the form of a concentric annular chamber, arranged about the axis of rotation, in which an equally annular-shaped compensating piston (29) is movably arranged.
    Type: Grant
    Filed: September 4, 1997
    Date of Patent: February 2, 1999
    Assignee: Mapal, Fabric Fur Prazisionswerkzeuge Dr. Kress KG
    Inventors: Dieter Kress, Herbert Jager
  • Patent number: 5857813
    Abstract: A boring tool for the fine finishing of surfaces of holes having at least one cutting bit and at least one guide ledge which are introduced and fixed in place in grooves arranged in the circumferential surface of the base body of the boring tool, characterized by the fact that a setting device is provided which is positively coupled with at least two cutting bits associated with each other; that the cutting bits are arranged displaceable by means of the setting device in the base body with respect to the circumferential surface; that the association of the cutting bits consists in that they are displaceable in opposite directions, with respect to the axis of rotation or center line of the boring tool; and that the setting device in each case displaces one cutting bit into a working position and the other cutting bit into a position of rest.
    Type: Grant
    Filed: March 26, 1997
    Date of Patent: January 12, 1999
    Assignee: Mapal, Fabrik fur Prazisionswerkzeuge Dr. Kress KG
    Inventors: Dieter Kress, Friedrich Haberle
  • Patent number: 5813804
    Abstract: A polycrystalline diamond (PCD) tipped tool for producing holes in non-ferrous and non-metallic composite materials without delamination. The tool comprises an elongated body portion having a distal cutting region and a proximal shank region and first and second cutting regions including first and second planar surfaces, respectively. The planar surfaces diverge in a direction from the distal cutting region toward the proximal shank region to define a cutting angle that is preferably about 120.degree..A first axial flute separates a forward edge of the first cutting region from a trailing edge of the second cutting region and a second axial flute radially opposed to the first axial flute separates a forward edge of the second cutting region from a trailing edge of the first cutting region. Each of the first and second cutting regions further includes a planar surface forming with a forward edge thereof respective first and second clearance angles of between 10.degree. to 20.degree.
    Type: Grant
    Filed: October 30, 1995
    Date of Patent: September 29, 1998
    Assignee: Mapal
    Inventor: Bert P. Erdel
  • Patent number: 5810506
    Abstract: A connecting device or coupling between two coupled tool parts including a first tool part (3) which has a driver (5) and a second tool part (7) which has a groove (9) includes a connecting place or location (1) which is characterized by the fact that it includes a device (15) which compels a well-defined angle-of-rotation position or orientation between the first tool part and the second tool part.
    Type: Grant
    Filed: July 15, 1996
    Date of Patent: September 22, 1998
    Assignee: Mapal Fabrik fur Prazisionswerkzeuge Dr. Kress KG
    Inventors: Dieter Kress, Friedrich Haberle
  • Patent number: 5795111
    Abstract: A reamer for precision machining of holes includes a reamer body and a knife plate supported above the exterior of the body and extending along the exterior. The knife plate has a front lower radial height cutting region and a rear taller radial height cutting region joined by an inclined step so that the first front region does the major cutting and the second rearward region does the finer machining. The front cutting region has an entrance bevel. The inclined flank shapes of the cutting regions are disclosed. Reamer guide strips supported along the support have a similarly shaped bevel and step as the knife plate.
    Type: Grant
    Filed: May 13, 1996
    Date of Patent: August 18, 1998
    Assignee: Mapal Fabrik fur Prasisionswerkzeuge
    Inventors: Dieter Kress, Friedrich Haberle
  • Patent number: 5746549
    Abstract: A metal cutting including a tool head, a cutting plate, and a snap-locking arrangement for securing the cutting plate to the tool head and formed of a projection, extending from the cutting plate or the bottom of the cavity, which is formed in tool head for receiving the cutting plate, into a hole formed, respectively, in the bottom of the tool head cavity or in the cutting plate, and a snap-action locking element located in the hole for engaging the projection and retaining it in the hole.
    Type: Grant
    Filed: August 29, 1996
    Date of Patent: May 5, 1998
    Assignee: Mapal Fabrik fur Prazisionswerkzeuge Dr. Kress KG
    Inventors: Dieter Kress, Friedrich Haberle
  • Patent number: 5655855
    Abstract: A tool for precise machining of metal includes two tool parts located one within the other and formed as an inner tool and a tool head respectively, and coupling elements which enable automatic replacement of the tool.
    Type: Grant
    Filed: September 1, 1995
    Date of Patent: August 12, 1997
    Assignee: Mapal Fabrik fur Prazisionswerkzeuge Dr. Kress KG
    Inventors: Dieter Kress, Friedrich Haberle
  • Patent number: 5649794
    Abstract: A drill including a bit having an extension received in and axially extending groove formed in the end face of the drill base body, a side cutting edge projecting beyond the base body circumference, and two active end cutting edges projecting beyond the end face of the base body, with the drill further including clamping elements for securing the bit extension in the base body groove with a possibility of radial adjustment.
    Type: Grant
    Filed: May 17, 1995
    Date of Patent: July 22, 1997
    Assignee: Mapal Fabrik fur Prazisionswerkzeuge Dr. Kress KG
    Inventors: Dieter Kress, Friedrich Haberle
  • Patent number: 5494383
    Abstract: A reamer tip having a face and a V-shaped indentation formed in the face and having sides, which form with an imaginary plane extending parallel to the face an angle of about 9.degree.-12.degree., preferably about 10.degree..
    Type: Grant
    Filed: February 23, 1995
    Date of Patent: February 27, 1996
    Assignee: Mapal Fabrik fur Prazisionswerkzeuge Dr. Kress KG
    Inventors: Dieter Kress, Friedrich Haberle
  • Patent number: 5478179
    Abstract: A reamer tip including a main cutting edge and a auxiliary cutting edge adjoining the first main cutting edge; and a flank provided in a region of the main and auxiliary cutting edges and including a first inclined flank region having a first back angle of about 7.degree., and a second inclined flank region directly adjoining the auxiliary cutting edge, extending from the auxiliary cutting edge to the first flank region, and having a second back angle substantially smaller than the first back angle.
    Type: Grant
    Filed: February 23, 1995
    Date of Patent: December 26, 1995
    Assignee: MAPAL Fabrik fur Prazisionswerkzeuge Dr. Kress KG
    Inventors: Dieter Kress, Friedrich Haberle
  • Patent number: 5474406
    Abstract: A cutting plate for a reamer for fine machining of metal workpieces including a main cutting edge, an auxiliary cutting edge, an apex point at which the auxiliary cutting edge is connected with the main cutting edge, and a chip deflecting surface limited by a chip deflecting step having a high point located opposite a region of the apex point, a first region associated with the main cutting edge and descending, starting from the high point, away from the main cutting edge, and a second region associated with the auxiliary cutting edge and extending relative to the auxiliary cutting edge at an angle of from 0.degree. to about 10.degree..
    Type: Grant
    Filed: June 21, 1994
    Date of Patent: December 12, 1995
    Assignee: MAPAL Fabrik fur Prazisionswerkzeuge Dr. Kress KG
    Inventors: Dieter Kress, Friedrich Haberle
  • Patent number: 5328307
    Abstract: A cutting tool of the specified type is to be miniaturized and configured in such a manner that it is suitable for working bores having a diameter of 6 mm and more and for high-speed work with revolving tools.The solution according to the invention provides that the adjustment screws for radially adjusting the cutting plate simultaneously form a clamping means for the form-locking clamping of the cutting plate to the supporting shoulder of the basic tool body.A preferred field of use are precision drills and grinding tools equipped with inserted cutting strips made of a highly wear resistant cutting material.
    Type: Grant
    Filed: February 24, 1993
    Date of Patent: July 12, 1994
    Assignee: MAPAL Fabrik fur Prazisionswerkzeuge Dr. Kress KG
    Inventors: Heiner Fees, Manfred Goetz
  • Patent number: 5328304
    Abstract: A reamer includes a cutting tip mounted in the circumferential wall of the base body of the cutting head of the reamer, and at least one guide bead located in a groove formed in the base body and extending in the longitudinal direction of the base body. The guide bead has a contact surface containing at least regionwise a diamond material.
    Type: Grant
    Filed: January 21, 1993
    Date of Patent: July 12, 1994
    Assignee: Mapal Fabrik fur Prazisionswerkzeuge Dr. Kress KG
    Inventors: Dieter Kress, Friedrich Haberle
  • Patent number: 5211516
    Abstract: A cutting tool for expanding or opening up the diameter of boreholes includes at least one reversible knife plate with a front surface. The knife plate can be clamped with at least one clamping shoe into a recess provided in a cutter head. The front surface of the knife plate has at least two grooves which extend essentially parallel and preferably symmetrical with respect to the longitudinal axis of the knife plate. The grooves cooperate with projections provided on the contact surface of the clamping shoe facing the front surface of the knife plate and form a positively locked connection therewith.
    Type: Grant
    Filed: October 22, 1991
    Date of Patent: May 18, 1993
    Assignee: MAPAL Fabrik fur Prazisionswerkzeuge Dr. Kress KG
    Inventors: Dieter Kress, Friedrich Haberle
  • Patent number: 5149233
    Abstract: A reamer with at least one cutter plate that is held by at least one clamping jaw located in a recess in the head of the reamer and having an opening for a clamping screw is proposed, said reamer being distinguished by the fact that the clamping jaw (5) is shaped essentially as a triangle when viewed from the top, that the opening (23) for the clamping screw (7) is located in a corner of the triangle, and that the lateral surfaces of the clamping jaw (5) starting from this corner form guide surfaces (13, 15), which are provided with contact surfaces in the recess (9) in the head of the reamer. By using this clamping jaw, the cutter plate can be optimally clamped and aligned without weakening the main body of the reamer. Both the flank and lateral surfaces of the clamping jaw interact with the stop surfaces in a recess (9) in such a manner that optimal diversion of the clamping forces in the main body of the reamer also takes place.
    Type: Grant
    Filed: December 22, 1989
    Date of Patent: September 22, 1992
    Assignee: Mapal
    Inventors: Dieter Kress, Friedrich Haberle
  • Patent number: 5125772
    Abstract: A single-blade reamer (30) is disclosed with a cutter plate having a cutter blade (5) and attached to the base body (20), and with two guide strips (6, 7) disposed at the circumference of the base body. A chip-guide device (8, 9, 10, 11) is disposed between the cutter plate or, respectively, the cutter blade (5), and the first guide strip (6) following at an angular distance relative to the cutter (5) as seen from a point of a fixed external coordinate system when the reamer (30) is rotating in a proper cutting direction and/or between the first guide strip (6) and a second guide strip (7), disposed opposite to the cutter blade (5).
    Type: Grant
    Filed: March 6, 1989
    Date of Patent: June 30, 1992
    Assignee: Mapal Fabrik fur Prazisionswerkzeuge Dr. Kress KG
    Inventor: Dieter Kress
  • Patent number: 5074721
    Abstract: A hard metal cutting blade comprises a blade body having front and rear faces. The blade body is meant for engagement to a tool head and for rotation about a rotation axis. The blade is moved in a feed direction for the fine machining of bores that extend parallel to the rotation axis. The front face of the blade includes a recessed chip face which defines a cutting edge that has a main blade that is followed by a secondary blade. The main blade is divided into two regions, a first region that is almost flush or slightly inclined with respect to the secondary blade, and a second region which inclines at a greater angle and is spaced further from the secondary blade. An abrasion-resistant hard material coats the blade body. This material is ground away from the chip face, at least in the area of the secondary blade, to provide a radius of no more than 5 .mu.m for the edge of the secondary blade.
    Type: Grant
    Filed: April 4, 1990
    Date of Patent: December 24, 1991
    Assignee: Mapal Fabrik fur Prazisionswerkzeuge Dr. Kress KG
    Inventors: Dieter Kress, Friedrich Haberle
  • Patent number: D377801
    Type: Grant
    Filed: December 21, 1995
    Date of Patent: February 4, 1997
    Assignee: Mapal Fabrik fur Prazisionswerkzeuge Dr. Kress KG
    Inventors: Dieter Kress, Friedrich Haeberle