...that "patent leather" got its name because the process of applying the polished black finish to leather was once patented?
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| Number | Title | Issue Date |
| 8038370 | Milling cutter tool for chip removing machining, as well as a cutting body therefor A milling cutter tool, including a basic body and a cutting body. The basic body includes an envelope surface and two opposite ends between which a geometrical center axis extends around which the basic body is rotated. The cutting body is fixed in a seating of the ... | 10/18/2011 |
| 7520698 | Cutting tool for gears and other toothed articles A cutting tool having a two-sided cutting blade positionable in a tool holder to form a blade hob. The inventive cutting tool can be used to duplicate the generation action of single or multi-threaded, multi-gashed hobs. The two-sided cutting blade includes one or m... | 04/21/2009 |
| 7431544 | Deburring blade, device for mounting of deburring blades and bevel gear cutting machine for chamfering and/or deburring a bevel gear Bevel gear cutting machine for chamfering and/or deburring edges on the teeth of a bevel gear. The gear-cutting machine comprises a workpiece spindle, which receives the bevel gear coaxially of a spindle axis. Furthermore, a deburring spindle is provided for the rec... | 10/07/2008 |
| 7419339 | Drill thread milling cutter The invention relates to a drill thread milling cutter (1) for producing a bore and for the subsequent milling of a thread in the bore, said drill thread milling cutter (1) having a working region (2), on the circumference (3) of which a ... | 09/02/2008 |
| 7114891 | Thread forming tool with annular ridge A thread forming tool includes an elongated body defining a longitudinal center axis. The body including a thread forming portion formed by one or more annular ridges oriented perpendicular to the axis. The body has a non-circular shape in a cross sectional plane or... | 10/03/2006 |
| 7094009 | Gear-forming cutter A gear-forming cutter for forming a gear tooth on a non-metallic blank includes a spindle and a blade portion. The blade portion extends from the spindle along an axis of the spindle, and includes a blade surface and a surrounding surface. The blade surface has fron... | 08/22/2006 |
| 7094010 | Thread milling cutter, holder and a method for milling an external thread on a spigot The present invention relates to a thread milling cutter, which includes a cutting head, having a holder with a number of cutting insert pockets, a number of threading inserts, which are received in the cutting insert pockets and an attachment integrated with the cu... | 08/22/2006 |
| 6923227 | Canter chipper head The present invention provides a canter chipper head that comprises a rotor suitable for rotation about a rotation axis. The rotor has a lateral side and a frontal side, and includes a first cutting assembly and a second cutting assembly that are each mounted to the... | 08/02/2005 |
| 6839953 | Combination gear hobber, chamfer/debur and shaver apparatus and method An apparatus is provided for manufacturing a gear component. The apparatus includes a plurality of tooling stocks movable relative to a base. The tooling stocks function to retain a component, as well as operably driving a combination hob/shaver tool and a combinati... | 01/11/2005 |
| 6757949 | Combination gear hobber, chamfer/debur and shaver apparatus and method An apparatus is provided for manufacturing a gear component. The apparatus includes a plurality of tooling stocks movable relative to a base. The tooling stocks function to retain a component, as well as operably driving a combination hob/shaver tool and a combinati... | 07/06/2004 |
| 6663326 | Cutting tip and manufacturing method thereof A cutting tip having a three-layer laminated structure is provided. The tip is made from a disc-shaped three-layer laminate wherein a second layer consisting of a hard sintered compact of CBN or diamond is sandwiched by a first layer and a third layer con... | 12/16/2003 |
| 6042308 | Thread milling cutter with positioned tooth flanks A thread milling cutter including a shank and a milling region adjoining the shank at a front end of the shank and including at least two rows of teeth and extending parallel to each other, with the teeth of both rows having the same height and forming ea... | 03/28/2000 |
| 5924825 | Thread cutting insert This invention relates generally to a thread cutting insert and more particularly to a thread cutting insert comprising a base and a threading portion. The threading portion has a first thread removal portion and a second thread removal portion for minimi... | 07/20/1999 |
| 5718544 | Method for producing a two-part member having rack teeth A base member such as an elevation pipe of a photographic tripod is severed and rack teeth are formed thereon in a single operation while the base member remains clamped in a V-block. The first rack tooth on each side of the location where the base member... | 02/17/1998 |
| 5622459 | Tool for manufacturing crown wheels A tool for manufacturing crown wheels by means of a machining hobbing process, which consists of a disc which can rotate about its axis and on the circumference of which machining elements are disposed whose cutting edges lie in the surface of a profile w... | 04/22/1997 |
| 5325748 | Profile cutting tool A thread cutter has a set thread cutting tip for forming a pitch on a workpiece. The cutting projections that form the cutting edge are staggered by a few radians about the rotational axis of the cutter, so that they do not simultaneously come into cuttin... | 07/05/1994 |
| 5158400 | Rotary disc cutter and method of making same A rotary disc cutter for cutting workpieces, especially gears and the like. The rotary cutter comprises a plurality of cutting blades arranged about the periphery of a rotary disc cutting body with at least a portion of the blades being roughing blades co... | 10/27/1992 |
| 5123786 | Milling cutters A milling cutter has replaceable cutting inserts mounted on a toothed disc or drum body. Seatings for the inserts on the teeth locate them at spaced intervals on the periphery of each tooth. The inserts of at least one tooth of the body are peripherally s... | 06/23/1992 |
| 5092720 | Method for determination of longitudinal and profile modification of tool gear tooth surface A method for determination of longitudinal and profile modification of tool gear tooth (I) which linearly meshes with a gear to be machined, wherein modification parameters are determined from the following relationship: ##EQU1## where: δ--the amoun... | 03/03/1992 |
| 5007773 | Shaving cutter A helical toothed shaving cutter used for finishing or shaving of gears as well as a shaving cutter suitable for plunge cut shaving. The shaving cutter includes a multiplicity of ribs forming the cutter tooth flanks, arranged in a manner substantially sym... | 04/16/1991 |
| 4784537 | Multiple tooth thread milling apparatus Apparatus and cutting insert for milling threads into a workpiece using a single hard cutting insert having a plurality of cutting teeth or a plurality of hard cutting inserts each providing a single cutting surface.... | 11/15/1988 |
| 4666348 | Cutter for thread rolling dies Thread rolling dies for pointed fasteners having an improved working face contour which promotes displacement of blank material from the blank point area at an early stage in the thread rolling sequence to avoid excessive pressures in the die and blank at... | 05/19/1987 |
| 4629370 | Sprocket cutter and method of assembling Disclosed is a sprocket cutter in which there is a cutter body having a plurality of pockets along its periphery and a plurality of wedge recesses facing the periphery within each pocket. There is an array of inserts disposed within each of the pockets, e... | 12/16/1986 |
| 4610577 | Gear or rack-shaped tool for precision machining of tooth flanks particularly of hardened gears A gear or rack-shaped tool for precision machining of tooth flanks of gears is provided with a coating of a hard material like diamond or cubic bornitride (CBN). In order to be able to apply this coating without any problems, the tool includes two connect... | 09/09/1986 |
| 4038732 | Versatile cutting tool for gear manufacture Versatile face-mill cutting tool apparatus particularly useful in the manufacture of relatively large gears having diameters of 2 to 6 feet (0.6 to 2 meters). A single cutter body can be used in combination with one set of cutter blades to satisfy a wide ... | 08/02/1977 |