In 1608, Dutch eyeglass maker Hans Lipperhey filed the first patent for a working telescope. The patent was denied.
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| Number | Title | Issue Date |
| 7399146 | Rotary cutting tool having irregular insert orientation A rotary cutting tool such as a helical end mill, having pockets arranged to overcome harmonic vibrations. The tool has at least two and in one embodiment all three of three spacing irregularities. In the first irregularity, columns of pockets, typically associated ... | 07/15/2008 |
| 7014394 | Cutting tool Rotary cutting tools for cutting various types of sheet material are known. However, when cutting non-ferrous materials, damage known as fluttering is caused to both surfaces of the sheet material being cut. The requirement for the cutting of larger and larger sheet... | 03/21/2006 |
| 6893195 | Method and apparatus for producing forked roots of turbine blades For producing forked roots of turbine blades, the turbine blades are, in a first step, roughed-in and smoothed (finished) on their outer faces in a single operation with two rigidly coupled disk milling cutters that are provided hard metal cutter inserts. In a secon... | 05/17/2005 |
| 6799358 | Method for assembling and disassembling cutting inserts A method for assembling or disassembling cutting inserts mounted in a rotary cutting tool assembly (20). The cutting tool assembly comprises a plurality of coaxially mounted cutters (22) on a common shaft (24) having an axis of rotation (A). The... | 10/05/2004 |
| 6761514 | Hollow mill tool A hollow mill tool comprising a shank portion and a plurality of radially spaced and axially extending tool posts integrally formed with and projecting from the shank portion. Each tool post has a longitudinal cutting insert mounting face and each mounting face defi... | 07/13/2004 |
| 6497537 | Slotting cutter with cartridge assembly A slotting cutter including a support disc rotatable in a predetermined direction on a central axis. The support disc is of a generally cylindrical shape having a first side and a second side, and an outer periphery. A plurality of pockets including a car... | 12/24/2002 |
| 6120217 | Cutting tool for producing toothed articles A cutting tool comprising a cutter body member having a generally circular shape, a front surface, a back surface and an axis of rotation, the cutter body member includes an outer portion comprising a plurality of individual projections arranged spaced fr... | 09/19/2000 |
| 6068430 | Mounting mechanism for a pin mirror cutter In a mounting mechanism for a pin mirror cutter 22, the cutter body 22 is mounted with its outer periphery inserted into the inner periphery of a cutter mounting portion. an inclined surface of a tapered portion 22 formed on the cutter body and an incline... | 05/30/2000 |
| 6062775 | Cutting tool and insert bearing cartridge therefor A cutting tool including a cutting tool body having a peripheral surface formed with a plurality of recesses each adapted to receive an insert receiving cartridge. Each cartridge has transversely directed first and second side surfaces with an imaginary b... | 05/16/2000 |
| 5676505 | Method and milling tool to make deep grooves in a workpiece, especially in rotors of generators and turbines A deep groove, for example a groove in a rotor for a generator or turbine, can be formed in the rotor blank in only two sequential milling cuts, and wherein each milling cut, utilizing a single rotary milling cutter, carries out at the time both coarse cu... | 10/14/1997 |
| 5597268 | Milling cutter for T shaped groove It is an object of the invention to provide an economical milling cutter for T shaped groove. This invention is a milling cutter for T shaped groove comprising at least three cutting edge mounting seats distributed peripherally on a body one end flange of... | 01/28/1997 |
| 5393174 | Saw mill apparatus for castings and method Apparatus including a saw mill cutter for removing risers or excess material from castings such as for engine blocks, cylinder heads, cam carriers, transmission housings and the like, with the saw mill cutter simultaneously cutting the riser from the cast... | 02/28/1995 |
| 5373631 | Method for machining a radially symmetrical workpiece surface and a tool for performing the method A method for machining a rotation-symmetrical workpiece surface includes the steps of rotating the workpiece during machining, roughing the workpiece surface, smoothing in a longitudinal turning process the workpiece surface with a cutting tool having a c... | 12/20/1994 |
| 5314269 | Cutting insert and cutter A cutting insert is disclosed which includes a polygonal plate-shaped insert body having two opposite faces directed in the direction of insert thickness and a plurality of peripheral faces lying between the opposite faces. The opposite faces have margina... | 05/24/1994 |
| 5122134 | Surgical reamer The cutting head for a surgical reamer has a leading end for insertion into a bone canal and a trailing end for attachment to a drive shaft. The cutting head has a cutting surface formed about an axis of rotation of the cutting head. The cutting surface i... | 06/16/1992 |
| 5090845 | Disc mill with reversible cutting plates and adjustable cutting width A disc mill comprises a plurality of reversible cutter plates arranged in an alternating order and having an adjustable cutting width, a base body composed of at least two disc, a plurality of claw-like posts provided on each of the discs and carrying a r... | 02/25/1992 |
| 5083887 | Helical cutting tool A helical cutting tool having a plurality of cutting inserts of quadrilateral configuration removably attached to seats formed in the cutting tool, with each insert including a cutting edge extending in the axial direction bounded on opposite sides by a p... | 01/28/1992 |
| 4990035 | Contour milling cutter A cutting tool for machining printed circuit boards and the like includes a cutting part having an longitudinal axis of rotation, an outer surface, and a plurality of staggered teeth formed on the outer surface. The cutting part has a first predetermined ... | 02/05/1991 |
| 4948305 | Boring bar Boring bar having plural circumferentially spaced cutting inserts with incremental radial and axial spacing for innermost radial and foremost axial to outermost radial and rearmost axial in progressive sequence relative to the direction of rotation.... | 08/14/1990 |
| 4936718 | Rotary cutter and associated method A face milling cutter for holding a plurality of cemented tool bits for rotation about an axis and an associated method utilize a body of material defining a shank portion securable within a rotatable spindle of a machine tool for rotation about an axis a... | 06/26/1990 |
| 4867616 | Cutting inserts and tools including same A cutting-tool insert having a cutting edge at the periphery of at least one of its side faces, and a plurality of serrations in the cutting edge. The side faces of the insert are formed with a plurality of recesses between its center and the cutting edge... | 09/19/1989 |
| 4806050 | Edge routing cutter A rotary router bit for smoothing the edges of a sheet of abrasive or easily splintered material has two collars axially spaced on the router shank. Each collar has peripheral cutting teeth overlapping opposed teeth of the other collar and inclined at a s... | 02/21/1989 |
| 4794665 | Rotary cutter with serrated edges and positive/negative axial rake A rotary cutter having serrated cutting edges formed by the intersection with a cutting face of serrations angularly inclined to the cutting face to provide side clearance for the trailing sides of the serrations.... | 01/03/1989 |
| 4785860 | Wood processing machine having annular rings An apparatus for processing wood, comprising a cylindrical drum mounted for rotation about its longitudinal axis, a cutting member, means for mounting the cutting member upon the circumferential surface of the drum such that its cutting edge is positioned... | 11/22/1988 |
| 4765782 | Cutter A cutter for forming a spiral groove on a work is provided. The cutter comprises a cylindrical body provided on the outer periphery thereof with a plurality of cutting edges arranged circumferentially at equal intervals and displaced axially by a predetermined... | 08/23/1988 |
| 4729697 | Milling cutter A milling cutter comprises a cutter body having at least one insert blade station. At least one insert blade is operably connected with the cutter body at the insert blade station. The insert blade has opposite side faces, and a plurality of peripheral ed... | 03/08/1988 |
| 4685497 | Knife arrangement for a waferizer A waferizing apparatus having a rotatable disc. There are knife carriers mounted on the disc with spaced openings between the carriers. Openings in the disc correspond to the openings in the carrier and there is a knife associated with each opening. A kni... | 08/11/1987 |
| 4684297 | Milling cutter for cutting the contaminated surface of concrete A milling cutter for cutting the contaminated surface of concrete and used at the time of repairing and dismantling nuclear facilities. The milling cutter is characterized in that guide grooves are provided on the outer surface of a body, with their edges... | 08/04/1987 |
| 4674923 | Access notches for indexing inserts in a groove mill A tool for use in a groove mill to simultaneously form spaced grooves in the interior surface of a bore with the tool including a shank and a pair of heads mounted thereon in spaced relation and in a detachable, non-rotative manner. Each head includes a p... | 06/23/1987 |
| 4586855 | Face milling cutter A face milling tool is described including a holder securable to the end of a rotatable spindle. Cutting inserts are detachably secured to the end face of the holder at a radial distance from the axis of the spindle. The cutting edges of the inserts exten... | 05/06/1986 |
| 4573831 | Cutter blade A milling cutter blade with a notched cutting edge capable of being mounted at a desired negative or positive rake in a cutter body, the notches having side walls which, at the side face, diverge away from the cutting edge. The blade edge surfaces adjacen... | 03/04/1986 |
| 4529338 | Insert arrangement for a milling tool Metal working tools or tool holders having a body with flat-faced surface containing insert pockets with at least two indexable inserts in each pocket are described. A tapered wedge block is positioned between each pair of inserts to wedge the inserts aga... | 07/16/1985 |
| 4433948 | Cutter for a crankshaft milling machine A milling cutter for a crankshaft milling machine includes a disk, a plurality of generally square-shaped tips mounted on the disk and a plurality of forming tips mounted on the disk. The square-shaped tips and the forming tips are alternately arranged in... | 02/28/1984 |
| 4137956 | Wood incisor A wood incisor for perforating the surfaces of a rectangularly cross-sectioned elongate board preparatory to preservative treatment is comprised of sets of paired horizontal and vertical drums arranged in a manner to provide a rectangular passageway of ad... | 02/06/1979 |
| 4074594 | Rotary cutter for agglomerated foam plastic A rotary cutter, in the nature of a milling cutter, especially for agglomerated foam plastic, has a body with a concentric surface of revolution onto which are brazed block-like carbide cutting elements. The cutting edges of circumferentially adjacent cut... | 02/21/1978 |
| 3953915 | Method and apparatus for removing tread material from radial belted tires A method and apparatus for removing tread material from a pneumatic tire preparatory to recapping comprising a machine with a reversibly rotatable cutting disc with hardened cutting inserts located on the disc to take discrete elongate rubber chips from t... | 05/04/1976 |
| 3946474 | Rotary cutting head A cylindrical rotary cutting head rotatable about a longitudinal axis having a plurality of helical slots in which a plurality of bits carrying cutting edges are retained in the lateral direction by means of set screws which bear against a "V" groove in a... | 03/30/1976 |
| 3940835 | Slotting cutter and cutting insert therefor A slotting cutter in which a disc is provided with insert pockets on opposite sides thereof with replaceable cutting inserts of hard wear resistant material mounted in the pockets. The inserts are clamped in the pockets by a wedge which forces the inserts... | 03/02/1976 |