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...During the Civil War, the Confederacy established its own Patent Office which issued 266 patents, a third of which concerned implements of war.
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| Number | Title | Issue Date |
| 7364390 | Drilling tool Disclosed is a drilling tool comprising a first drill bit (2) that is provided with at least two forward cutting edges (4, 5) and a second drill bit (3) which encompasses at least two rear cutting edges (6, 7). A cutting groove (8, 9 | 04/29/2008 |
| 5904451 | Clamping device for machine tools A clamping device has a collet or a sleeve that contains an inner coolant supply. The non-through parts of the clamping device have formed therein radial slits and/or intermediate slits that open at the machine side and/or the tool side of the shank of th... | 05/18/1999 |
| 5867912 | Adjustable surgical handle A handle assembly having a swivel head for detachably holding a blade, includes a substantially elongate handle having a proximal end and a distal end, the proximal end is formed with a threaded shank having a having a hemispherical socket at the end ther... | 02/09/1999 |
| 5820135 | Counter centrifugal chuck and mounting systems The chuck includes a body with an axial recess and a transverse opening intersecting the recess. First and second cam members are disposed at least partially within the transverse opening and have first and second passages, respectively, which squeeze a c... | 10/13/1998 |
| 5758883 | Differential thread collet actuation An apparatus for adjusting the grip of a tubular collet upon work, the collet receivable in a bore formed by a holder, and comprising a rotatable connector member having first and second thread connections to the collet and to the holder, respectively; th... | 06/02/1998 |
| 5657541 | Holder assembly for surgical blade A holder assembly for a surgical blade includes a handle assembly and a wrench for loosening/tightening the blade from/to the handle of the handle assembly. The handle assembly includes a collet having two longitudinal slits that enable the collet to secu... | 08/19/1997 |
| 5405220 | Oil feeding collet chuck and its collet An annular front end base portion, a main portion and an annular rear end base portion form all together a substantial portion of a collet provided with a tapered outside surface adaptable closely in a tapered hole of a collet chuck and a tool holding hol... | 04/11/1995 |
| 5383673 | Collet for a square-shank tap A collet is designed for a tool having a cylindrical shank and a square drive at the rearward end of the cylindrical shank. The collet includes a collet body having a plurality of radially compressible collet segments. An axial bore is formed in the colle... | 01/24/1995 |
| 5133566 | Collet activated spindle work stop A spindle work stop including a collet having an externally threaded rear end portion with an external groove extending longitudinally therethrough and a slotted outwardly tapered front end portion, where an opening extends longitudinally through the coll... | 07/28/1992 |
| 4725064 | Chuck apparatus for workpieces or tools having a clamping sleeve of variable size Chuck apparatus for workpieces or tools with a base body provided with a cylindrical borehole and a concentrically thereto arranged cylindrical clamping sleeve of variable size with internal and external annular recessed grooves displacedly arranged relat... | 02/16/1988 |
| 4705439 | Machine tool collet containing means for passing a cutting fluid therethrough Disclosed is a machine tool collet having a collet body having a shaft for receiving a cutting tool at a forward open end thereof and a rearward open end insertable into a tool holder means, at least one first axial slit opening into the rearward open end... | 11/10/1987 |
| 4497498 | Expanding-contracting gripping device for workpiece A device for releasably gripping a workpiece includes first and second axially elongated, cylindrical gripping sleeves, the second sleeve being coaxially supported within the first sleeve for axial movement relative thereto. Each sleeve includes a plurali... | 02/05/1985 |
| 4496163 | Adaptors for a collet chuck Adaptors for a double taper collet chuck in the form of first and second adaptor rings with inside tapers complementary in shape to collets and outside tapers interfitting with the collet chuck enable a particular collet chuck to handle a wide range of co... | 01/29/1985 |
| 4423880 | Hydraulic chuck An improved chuck utilizing a self-contained hydraulic system integrated to the spindle rotor to radially flex a thin walled diaphragm so as to grip a collet and a tool therein. Pressure in the hydraulic system is controlled by means of a plunger which is... | 01/03/1984 |
| 4422653 | Chuck for tubular workpieces A chuck is provided with a cylindrical workpiece gripping element having a jacket and an article gripping member and a resilient rubber-like sleeve sandwiched between. The jacket and gripping member are partially segmented into longitudinal strips so that... | 12/27/1983 |
| 4387906 | Tool or workpiece chucking device A chucking device for tools or workpieces having a cylindrical or slightly conical chucking surface. The chucking device includes body (1), which is provided with truncated cone-shaped surface (3), cavity (4) located inside the surface and along a substan... | 06/14/1983 |
| 4317577 | Rotary expandable tool with hydraulic internal intensifier A relatively high fluid pressure actuated rotary arbor or chuck having internal pressure intensifying differential pistons for converting relatively low pressure from an outside supply through a relatively low pressure non-rotating coupling connection. A ... | 03/02/1982 |
| 4211425 | Replaceable collet in double diaphragm chuck A work holder adapted to minimize clamp distortion of a workpiece by providing a movable metallic collet encompassing the workpiece, and a plurality of front and rear jaws to grip the metallic collet with different pressure forces at the front and rear se... | 07/08/1980 |
| 4133544 | Replaceable collet in double diaphragm chuck A work holder adapted to minimize clamp distortion of a workpiece by providing a movable metallic collet encompassing the workpiece, and a plurality of front and rear jaws to grip the metallic collet with different pressure forces at the front and rear se... | 01/09/1979 |
| 4032162 | Machine tool chuck A high speed hydraulically actuated rotatable chuck for machine tools, permitting the high pressure clamping of elongated work pieces with capacity to be machined simultaneously at opposite ends. Two separate, axially aligned hollow work holding elements ... | 06/28/1977 |
