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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 |
| 7374624 | Vertical plate dip quench A method and apparatus for quenching steel plates after they come from an austenitizing furnace. The plates are rotated to a vertical orientation and rapidly submerged into a water bath while being held flat between reciprocating rolls. The superior uniformity and s... | 05/20/2008 |
| 7303060 | Material conveying system without dust rising A material conveying system without dust rising, having a plurality of trays; a transmission mechanism, for carrying the trays and transmitting the trays in motion; and a controller, for controlling the transmission mechanism, is characterized in that the material c... | 12/04/2007 |
| 7250133 | Device for use when hardening A device for use when hardening includes fixture parts (1, 4, 6) between which a workpiece is fixed during hardening. The device's fixture parts (1, 4, 6) are three or more so that two or more workpieces are fixed simultaneously in the device. ... | 07/31/2007 |
| 6328829 | Constrained hardening method and apparatus for deformed bar workpieces Hardening is accomplished by heating a longitudinal section of a workpiece such as an odd-shaped bar, and by quenching while constraining the workpiece section in dies. The quenching is executed while the workpiece is pressed in a direction perpendicular ... | 12/11/2001 |
| 6048418 | Ring forming apparatus and heat treating process An improved method for heat treating and forming Belleville washers, springs, clutch plates and the like by initially stamping or otherwise forming a flat ring, heating the ring to an elevated temperature of approximately 1700° F., placing the hot ring w... | 04/11/2000 |
| 5792418 | Process and device for preventing nonparallelism in beam sections A process and device for preventing nonparallelism from occurring when rolling beams on universal beam rolling trains by partial application of coolant to the beams. The coolant is applied to the underside of the web during the rolling process in order to... | 08/11/1998 |
| 5667603 | Hardening process and apparatus for holed flat parts A process for hardening a plurality of holed flat parts. The holed flat parts are heated by inserting a cantilever hanger into the holes of the holed flat parts to support them in vertical positions within a furnace. The holed flat parts are then removed ... | 09/16/1997 |
| 5626693 | Method and apparatus for quenching a tubular workpiece This invention provides a method and apparatus for quenching a tubular workpiece such as cylindrical tubes or different-shaped tubes, which are difficult to be exerted constraining force for preventing warping especially in case of thinner thickness. Warp... | 05/06/1997 |
| 5492308 | Constrained quenching apparatus and heat treatment apparatus A constrained quenching apparatus is provided for hardening a workpiece such as an asymmetrical bar which has a notable tendency to warping when quenched, without warping the workpiece. The apparatus comprises a set of two or more dies having plural proje... | 02/20/1996 |
| 5452882 | Apparatus for quenching metallic ring-shaped workpieces For quenching heated metallic work pieces with a quenching intensity that lies in the region of H values from 0.2 to 4, which is typical for oil or water quenching, a cooling gas is used as the quenching medium in the form of discrete jet streams issuing ... | 09/26/1995 |
| 5401006 | Quench press A method and press for uniformly quenching a heated annular workpiece while fixturing the workpiece to prevent distortion during quenching. The press has a conically shaped lower die for receiving a workpiece to be quenched thereon and a vertically recipr... | 03/28/1995 |
| 5316269 | Leaf spring constraining apparatus Disclosed is a constraining apparatus, for constraining cambered leaf spring blanks when they are quenched in an quenching oil in the oil tank of a quenching systems so as to prevent any possible distortion in the directions of the thickness and width of ... | 05/31/1994 |
| 4923529 | Equipment for continuous heat treatment of tungsten filaments wound on molybdenum cores The invention relates to continuous heat treatment of coiled tungsten filaments wound onto molybdenum cores, in the course of which said filament is passed first through a humid hydrogen atmosphere of about 1300° C. then through a dry hydrogen atmosphere... | 05/08/1990 |
| 4848753 | Apparatus for the inner and outer quenching of tubular pieces An apparatus for providing the outer quenching and the inner quenching of tubular pieces, notably of steel tubes, characterized in that it includes successively, in the advancement direction of the tubes: slanting rollers allowing the tubes delivered continuou... | 07/18/1989 |
| 4834344 | Apparatus for inside-outside tube quenching An inside-outside quench arrangement is disclosed for long steel pipe which utilizes a tangential quench arrangement to cool the pipe's outside surface and an axial flow nozzle to cool the pipe's inside surface at approximately the same cooling rate. The ... | 05/30/1989 |
| 4826138 | Apparatus for heat treating steel plates A method and apparatus for heat treating steel plates subject to longitudinal length distortion wherein the plate at a temperature of the critical temperature of the steel passes through leveling rolls to remove the length distortion and immediately there... | 05/02/1989 |
| 4803037 | Pipe quenching apparatus An improved method and apparatus for quenching elongated steel pipe in a liquid cooling medium substantially improves the straightness of the finished product. After being heated to an initial temperature higher than the austenite transformation temperatu... | 02/07/1989 |
| 4611789 | Apparatus for the production of improved railway rails by accelerated cooling in line with the production rolling mill Railroad rails having improved wear resistance, are produced by controlled forced cooling from above the austenite transformation temperature, to produce rails having a fine pearlite metallurgical structure in the head portions of the rails. Apparatus com... | 09/16/1986 |
| 4592537 | Apparatus for heat treating and sizing thin walled articles Thin walled broached parts are heat treated from manufactured dimensions to predetermined dimensions through control of heating, cooling and pressurization parameters during the heat treating cycle.... | 06/03/1986 |
| 4575054 | Apparatus for quenching steel pipes An apparatus is provided for quenching a hollow-bodied piece of steel with an opening at each end thereof, such as a steel pipe, which comprises exterior and interior quenching means. The exterior quenching means includes means for directing a cooling med... | 03/11/1986 |
| 4575052 | Apparatus for continuously quenching a steel plate A method of and apparatus for continuously quenching a steel plate with cooling water, by passing the steel plate through a water storage vessel containing the cooling water. The cooling water for cooling the upper side of the steel plate is introduced in... | 03/11/1986 |
| 4573667 | Apparatus for quenching substantially flat workpieces An apparatus for rapidly quenching substantially flat metal workpieces which have been heated during a heat treatment process is disclosed. The apparatus comprises a substantially flat plate having a plurality of vapor relief apertures therein, a wick ele... | 03/04/1986 |
| 4461462 | Apparatus for cooling steel pipe A method and apparatus for cooling at least the inside of steel pipes. Cooling is effected while restraining the radial displacement of a pipe at a point not more than 500 mm, or preferably not more than 250 mm, away from each end of the pipe and at inter... | 07/24/1984 |
| 4458885 | Quenching apparatus for steel pipes A quenching method and apparatus for quenching a steel pipe heated throughout the length thereof to a given quenching temperature in which during cooling of the steel pipe, the pipe is rotated or the pipe is moved axially while rotating it thereby uniform... | 07/10/1984 |
| 4444604 | Method of preventing distortion of a heated workpiece during cooling A method is provided for preventing distortion of a heated cylindrical metal workpiece during cooling. The method includes heating the workpiece and then placing a fixture substantially at room temperature in the workpiece. The fixture has a plurality of ... | 04/24/1984 |
| 4444376 | Multi-pipe type quenching apparatus A multi-pipe quenching apparatus for simultaneously quenching a plurality of steel pipes at a high speed. The apparatus comprises (a) a steel pipe holding table for holding a plurality of steel pipes arranged in parallel which table is provided with a plu... | 04/24/1984 |
| 4415143 | Continuous hardening device of steel plate A continuous hardening device of steel plate of a type wherein steel plate is continuously cooled and hardened by cooling water. The cooling water is continuously supplied into and exhausted out of a water vessel (10) provided in the path of the steel pla... | 11/15/1983 |
| 4371149 | Apparatus for cooling sheet steel by water spraying Cooling water is sprayed under a predetermined pressure range and at a predetermined discharge rate over the both surfaces of a sheet to be treated which is reciprocated lengthwise at such a velocity that the product of the reciprocating velocity and thic... | 02/01/1983 |
| 4336924 | Apparatus for quenching heated workpieces A method and apparatus for quenching heated elongated workpieces by rotatably mounting the heated workpiece in a quench tank and subsequently rapidly flooding the tank with a quenching liquid. The heated workpiece is mounted within the quench tank by enga... | 06/29/1982 |
| 4298188 | Machines for cooling metal sheets or like products The machine for cooling metal sheets has a lower frame and an upper frame, sets of sheet driving and guiding rolls rotatively mounted in the frames. These frames define an enclosure which surrounds the rolls and in which enclosure a cooling fluid circulat... | 11/03/1981 |
| 4203579 | Installation for tempering long cylindrical pieces in form and in thin layer A tempering unit for tempering shaped forms in thin layer has an interchangeable central unit provided with grippers for the workpiece before tempering made up of an assembly of bearing fingers supporting the workpiece and assembly of bearing fingers moun... | 05/20/1980 |
| 4149703 | Apparatus for quenching a heated metal plate An apparatus for quenching a heated metal plate moving and restrained in a plane has upper and lower rolls which engage the top and bottom surfaces of the plate. Jets of quench fluid are located between the rolls and direct quench fluid onto the top and b... | 04/17/1979 |
| 4132393 | Apparatus for cooling hot steel plate and sheet An apparatus for cooling hot steel plate and sheet has a plurality of cooling units disposed along the plate or sheet delivery line. Each cooling unit has a top and a bottom roll-and-nozzle assembly and a device for coupling them. The top and bottom assem... | 01/02/1979 |
| 4079919 | Water spray quench process and apparatus A water spray quench process and apparatus for the hardening of steel agricultural discs and like articles with minimum warpage and maximum exposure to the quenching water. A steel article heated in a furnace to a temperature above its austenitizing tempe... | 03/21/1978 |
| 4057230 | Die quench machine and method The invention is concerned with a horizontally closing die quenching apparatus and with a method for die quenching. The apparatus comprises a pair of relatively movable opposed substantially vertical platens each supporting a plurality of die blocks, the ... | 11/08/1977 |
| 4042227 | Method and apparatus for continuously homogenizing and quenching aluminum billets This disclosure relates to a method and apparatus for continuously homogenizing and quenching aluminum billets in an in-line tandem system. The billets are conveyed into a furnace and transported through a series of stages therein where they are heated to... | 08/16/1977 |
