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...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 |
| 7323960 | Electromagnetostrictive actuator An actuator includes an electromagnetostrictive element that has one end located on a front side and the other end located on a rear side. An output shaft penetrates the electromagnetostrictive element and is pressurized toward the rear side of the electromagnetostr... | 01/29/2008 |
| 6345939 | Apparatus for machining, especially drilling of structural shapes An apparatus for drilling structural shapes such as angles, I-beams and H-beams has sliders shiftable transversely to the beam along vertical and horizontal members of a frame through which the beam is passed. At least one of the sliders can have a rotata... | 02/12/2002 |
| 6345937 | Tool and method for the cutting machining of a workpiece A tool for cutting machining a workpiece, including a cutter plate supported on a holder for machining a surface and additionally comprising a tool projecting from the body of the tool. The cutter plate is supported on a holder which is in turn supported ... | 02/12/2002 |
| 6183172 | Structure for detachably mounting a horizontal drill head A structure for detachably mounting a horizontal drill head 5 on a drill head 4 including a driving spindle 10 rotatably driven by a driving means, a head case 2 for holding the driving spindle 10 above a work table 26 on which a work or works "W" are pla... | 02/06/2001 |
| 5980172 | Double cutting spindle unit for a cutting machine A double cutting spindle unit comprising a main spindle unit and a sub-spindle unit mounted on the main spindle unit and vertically slidable relative to the main spindle unit. The chucking member is normally biased toward its fastening direction by a fast... | 11/09/1999 |
| 5865572 | Tool for the metal machining treatment of boring surfaces 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... | 02/02/1999 |
| 5607266 | Speed reducer assembly A speed reducer assembly for use with a power hand drill comprising a speed reducer connected to the rotating hub of the drill and having a gear arrangement including a first rotating member and a second rotating member, the second rotating at a speed slo... | 03/04/1997 |
| 5482412 | Cutting tool A slider 16 having a cutting insert 5A is slidably mounted in a groove 11 formed along the generatrix dimension of a substantially conical tool body 1. Serrations 12 and 16a, which are brought into close contact with each other for engagement, are formed ... | 01/09/1996 |
| 5044841 | Valve seat bushing machining apparatus Apparatus for machining a valve seat and valve stem guide all from the valve seat side of a head or block. The valve seat is machined in one pass by a single point cutting tool which is moved on two axes and, the valve guide bore is machined by a reamer. ... | 09/03/1991 |
| 4836719 | Method and apparatus for machining valve seats and valve stem guides in a deep-walled engine monoblock workpiece Valve seats are machined at the end of an axially deep, narrow cavity of a workpiece having an axially clampable surface within the cavity adjacent one or more valve seats. The method comprehends: (a) supporting a rotary driven spindle assembly of suffici... | 06/06/1989 |
| 4789280 | Tooling assembly for automatic tool changing A tooling assembly (10) is disclosed having a plurality of tool holders (18, 20) for independently driven cutting tools (14, 16), the tooling assembly adapted for automatic insertion and removal from a spindle assembly (12). The plurality of cutting tools... | 12/06/1988 |
| 4692074 | Tool coupling arrangement for a tooling assembly A tool coupling arrangement is disclosed for a tooling assembly (10) adapted for automatic tool insertion into a spindle assembly (12), the tooling assembly (10) having an axially moveable element (20) for causing movement independently of the spindle ass... | 09/08/1987 |
| 4623287 | Drilling machine especially for drilling glass Drill apparatus, especially for drilling glass, with hydraulic and/or mechanically advancing, driven drill spindle, wherein the drill spindle is secured in a spindle carrier and is equipped at the end which is facing towards the workpiece with a drill, as... | 11/18/1986 |
| 4468826 | Hammer-drill for masonry fasteners A hammer-drill is adapted for drilling a hole in masonry and subsequently driving a threaded masonry fastener therein. The hammer-drill has a driving output shaft nested concentrically within a driving output sleeve. The shaft and sleeve both extend forwa... | 09/04/1984 |
| 4230162 | Wood working machine In accordance with this invention a wood working machine is provided which facilitates the sequential working of opposite sides of a wooden work piece to form a flange for a cable reel. The work piece is grippingly held against a work piece support while ... | 10/28/1980 |
| 4226591 | Contra-angle head for driving two dental tools A contra-angle tool holder head notably for dental drills and cutters, for rotatably driving in opposite directions two coaxial dental tools such as drills or cutters comprises a first holding member adapted to drive the first tool and consisting of a cla... | 10/07/1980 |
| 4141278 | Polygonal turning machine A polygonal turning machine with a rotating knife head, and a workpiece carrier rotating synchronously to the knife head, the carrier being arranged on a support, characterized in that, the axis of the workpiece carrier is able to be brought into a coaxia... | 02/27/1979 |
| 4105360 | Dual cut boring tool assembly A boring tool assembly performs both the rough and finish cutting operations upon a metal work piece without power activation or manual adjustments of the tool units between the cutting strokes. The assembly includes a boring bar having a pair of fixed, d... | 08/08/1978 |
| 4066380 | Combined boring and threading tool The invention relates to a threading tool for internal threads with a cutter holder which is displaceably mounted on a cutter holder carrier shaft co-axial to the main axis of the rotatable tool which coincides with the thread axis during the cutting proc... | 01/03/1978 |
| 4059115 | Surgical instrument for operation of anterior fenestrated spondylodessis in vertebral osteochondrosis A surgical instrument for the surgical operation of anterior fenestrated spondylodesis comprising an elongated hollow body with a handle at one end, and a detachable hollow cylindrical cutter with a cutting edge, at the other. Incorporated within the body... | 11/22/1977 |
