Famous Patents
3M employee and church chorister Art Fry needed something to temporarily mark pages in his hymnal. He was in luck because his colleague, Spencer Silver, accidentally developed a glue that was too weak for other purposes. After initially discouraging consumer response, Post-it Notes became a hit in 1979.
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| Number | Title | Issue Date |
| 7338235 | Internal broach An internal broach for internally broaching profiles, defined by a bottom and flanks, of female serrations of a work piece having a toothed section with several rows of broach cutting teeth, the rows being disposed successively counter to a direction of broaching, w... | 03/04/2008 |
| 7326012 | Broaching apparatus and method for producing a gear member with tapered gear teeth The apparatus of the present invention provides a broaching machine configured to produce an internal gear member. The broaching machine includes a broaching tool defining a central axis. The broaching tool includes a first set of broaching teeth configured to cut b... | 02/05/2008 |
| 6676336 | Multi-part dovetail repair broach assembly and methods of use The broach assembly includes alternate spacers and cutters arranged in a sub-assembly having a lead at a leading end and a lag at a trailing end. The cutters have side margins in excess of the margins of the spacers for cutting material from the dovetail ... | 01/13/2004 |
| 6634836 | Apparatus and methods for refurbishing generator field wedge form slots A broach assembly includes an elongated base having a central upward projection and a pair of side flanges and a tapered undersurface. Releasably mounted on the projection are multiple tool holders spaced along the length of the base. The tool holders mou... | 10/21/2003 |
| 6558086 | Broach for use in performing machining operations A broach comprises an elongate body having a plurality of longitudinally spaced pockets therein. A threaded hole is provided in each of the pockets. The pockets are adapted to receive cutting inserts. The cutting inserts have a hole that is adapted to ali... | 05/06/2003 |
| 6551032 | Multi-part dovetail repair broach assembly and methods of use The broach assembly includes alternate spacers and cutters arranged in a sub-assembly having a lead at a leading end and a lag at a trailing end. The cutters have side margins in excess of the margins of the spacers for cutting material from the dovetail ... | 04/22/2003 |
| 6527484 | Helical tooth broach A helical gear tooth broach having an elongate body having a series of axially aligned and spaced teeth disposed thereon. The direction of tooth spaces or traces of the teeth in a longitudinally extending helical alignment and the direction of the gullets... | 03/04/2003 |
| 5865569 | Internal broach for the internal broaching of profiles An internal broach for the broaching of profiles defined by a bottom and flanks, in particular of internal toothings, in a workpiece is provided with broach cutting teeth which have bottom-cutting edges and flank-cutting edges. Over their full profile hei... | 02/02/1999 |
| 5820320 | Apparatus for treating the inner surface of vacuum chamber An apparatus for treating the inner surface of a vacuum chamber includes a support, means for anchoring the vacuum chamber to the support and holding the vacuum chamber, a broach having a plurality of cutting edges having cutouts, and broach drive means t... | 10/13/1998 |
| 5743680 | Metal removing tool, in particular lancing insert A metal removing tool, in particular lancing insert, has a holder (10) with a slot-shaped recess (11) and a cutting insert (12) detachably held therein under a prestress by means of an elastically expandable clamping arm (101) designed as one side of the ... | 04/28/1998 |
| 5645617 | Composite polycrystalline diamond compact with improved impact and thermal stability A compact blank for use in operations that require improved thermal stability, impact strength, and abrasion resistance is disclosed. The compact includes a substrate formed of tungsten carbide or other hard material with multiple abrasive diamond crystal... | 07/08/1997 |
| 5503506 | High precision, high surface finish broaching tool A broaching tool has a plurality of cutting teeth for broaching a small, deep hole with high precision and surface finish. Three to eight teeth are engaged in the hole for cutting at any one time. For broaching sticky metals such as stainless steel, each ... | 04/02/1996 |
| 4869623 | Method of broaching outer periphery of lobe-type rotor of roots-type fluid machine, and broaching cutter used in the method A broaching method for finishing an outer peripheral surface of a resin layer of a resin-coated lobe-type rotor for a rotary fluid machine of a Roots type, which includes the steps of forming, with a leading grooving cutter, at least one chip-breaker groo... | 09/26/1989 |
| 4861204 | Turn broaching tool A broaching tool is provided with at least nine cutting tool edges arranged at its circumference. The cutting tool edges cover only a certain sector along the circumference of a tool disk while leaving another sector between a first and last cutting tool ... | 08/29/1989 |
| 4841820 | Method of designing a turn broach An improved cutting tooth configuration in which, unlike the conventional, straight line tool pattern with its constant tool rise, each tooth is incrementally advanced relative to the prior tooth by an amount that progressively decreases. This accounts fo... | 06/27/1989 |
| 4784534 | Turn broach with reduced wear tooth configuration An improved cutting tooth configuration in which, unlike the conventional, straight line tool pattern with its constant tool rise, each tooth is incrementally advanced relative to the prior tooth by an amount that progressively decreases. This accounts fo... | 11/15/1988 |
| 4693813 | Method of broaching outer periphery of lobe-type rotor of roots-type fluid machine, and broaching cutter used in the method A broaching method for finishing an outer peripheral surface of a resin layer of a resin-coated lobe-type rotor for a rotary fluid machine of a Roots type, which includes the steps of forming, with a leading grooving cutter, at least one chip-breaker groo... | 09/15/1987 |
| 4671709 | Pot broach A tooth broach designed for use with thin workpieces having its teeth arranged in circumferentially extending sets in each of which the teeth are arranged in groups of one or more teeth, and gaps devoid of teeth between adjacent groups. The teeth are furt... | 06/09/1987 |
