Patents Assigned to WNC-Nitrochemie GmbH
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Patent number: 5544587Abstract: In cannon ammunition including a cartridge case containing a propellant charge, a case bottom to which the cartridge case is connected, a charge igniter, and a primmer element positioned in the case bottom, the improvement in which the cartridge case is combustible, is connected to the primer element, and includes a combustible material and a pyrotechnical mixture which is embedded within the combustible material and which is composed of at least one reducing agent and at least one oxidizing agent which form a pyrotechnical redox system; and the charge igniter consists of the cartridge case.Type: GrantFiled: December 8, 1994Date of Patent: August 13, 1996Assignees: Rheinmetall Industrie GmbH, WNC Nitrochemie GmbHInventors: Stefan Thiesen, Eckhard Rahnenfuhrer, Josef Kohler
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Patent number: 5443009Abstract: A charge arrangement for cartridge ammunition having a cartridge case, a bottom igniter secured in the case bottom and a primer that coaxially surrounds at least one part of the propellant composed of bulk powder and a tail-side part of a projectile that projects into the cartridge case. To ensure reliable ignition of the propellant bulk in a simple manner, a primer is provided that is comprised of either a separate, relatively thin-walled, combustible sleeve or the inner layer of a multilayer, combustible cartridge case which faces the propellant.Type: GrantFiled: June 6, 1994Date of Patent: August 22, 1995Assignees: Rheinmetall GmbH, WNC Nitrochemie GmbHInventors: Stefan Thiesen, Eckhard Rahnenfuhrer, Josef Kohler
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Patent number: 5346304Abstract: An apparatus for mixing propellant charge powder rods. The apparatus comprises a flexible band (1) which is suspended freely in a loop between two paraxial, radially spaced drums (2,3) and is movable back and forth between the drums (2,3) by drive motors (6,7). The band (1) is finite or endless and movable in reciprocation between two winding drums (4,5) each adapted to be driven in either direction of rotation by the drive motors (6,7). The propellant charge powder rods (30) are placed in the suspended loop of the flexible band (1)--transversely of the longitudinal direction of the band--and are mixed together by moving the band (1) back and forth. The length of the loop is increased and decreased periodically during this process.Type: GrantFiled: December 1, 1993Date of Patent: September 13, 1994Assignee: WNC-Nitrochemie GmbHInventor: Helmut Kleinhans
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Patent number: 5290505Abstract: A method is indicated of recycling plastic sheet material coated with adhesive and available in chopped form. The method provides for separating the plastic from the adhesive. In a first method step the chopped sheet material (4) is introduced into a solvent bath (1) where the chopped sheet material (4) is moved for a predetermined dispersing time under mechanical action. The mechanical action preferably is exercized by rolling or kneading. In a second method step, the adhesive dispersed in the solvent is separated from the chopped sheet material (4) by mechanical action of forces--preferably by introducing squeezing forces in a conveyor screw.Type: GrantFiled: July 22, 1992Date of Patent: March 1, 1994Assignee: WNC-Nitrochemie GmbHInventors: Gerhard Huber, Karl Pichl
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Patent number: 5290100Abstract: A method for mixing propellant charge powder rods utilizes a flexible band (1) which is suspended freely in a loop between two paraxial, radially spaced drums (2,3) and is movable back and forth between the drums (2,3) by drive motors (6,7). The band (1) is finite or endless and movable in reciprocation between two winding drums (4,5) each adapted to be driven in either direction of rotation by the drive motors (6,7). The propellant charge powder rods (30) are placed in the suspended loop of the flexible band (1)--transversely of the longitudinal direction of the band--and are mixed together by moving the band (1) back and forth. The length of the loop is increased and decreased periodically during this process.Type: GrantFiled: April 26, 1991Date of Patent: March 1, 1994Assignee: WNC-Nitrochemie GmbHInventor: Helmut Kleinhans
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Patent number: 5266242Abstract: The invention relates to a method of and an apparatus for producing tribasic propellant charge powders. An operationally safe and continuous course of the production process is obtained according to the invention by first preparing a fully gelatinized dibasic intermediate product of nitrocellulose and a blasting or explosive oil, without solvent, in a shearing mill (1). The intermediate product is granulated and supplied to an extruder (4) into which the third crystalline energy carrier and solvents are introduced. There the pulverous mixture is homogenized and extruded to form powder strands which are moist with solvent.Type: GrantFiled: January 7, 1991Date of Patent: November 30, 1993Assignee: WNC-Nitrochemie GmbHInventors: Klaus-Dieter Mogendorf, Wolfgang Miehling
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Patent number: 5251531Abstract: In the production of monobasic propellant charge powders with alcohol and ether as solvents there is the risk of ether bubbles forming in the propellant charge powder material, and those bubbles greatly reduce the quality of the propellant charge powder. The invention provides for cooling the propellant charge powder material prior to its leaving the extruder. To accomplish that, the extruder head (4) is provided with a cooling means. The invention is especially well suited for use in the preparation of monobasic propellant charge powders with alcohol and ether as solvents.Type: GrantFiled: November 30, 1992Date of Patent: October 12, 1993Assignee: WNC-Nitrochemie GmbHInventor: Wolfgang Miehling
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Patent number: 5186871Abstract: In a production of monobasic propellant charge powders with alcohol and ether as solvents there is the risk of ether bubbles forming in the propellant charge powder material, and those bubbles greatly reduce the quality of the propellant charge powder. The invention provides for cooling the propellant charge powder material prior to its leaving the extruder. To accomplish that, the extruder head (4) is provided with a cooling means. The invention is especially well suited for use in the preparation of monobasic propellant charge powders with alcohol and ether as solvents.Type: GrantFiled: December 13, 1990Date of Patent: February 16, 1993Assignee: WNC-Nitrochemie GmbHInventor: Wolfgang Miehling
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Patent number: 4963296Abstract: A process is provided for the preparation of dibasic propellant charge powder by a solvent-free process, in which a continuous flow of raw powder mixture moist with water is kneaded at an elevated temperature in a set of shearing rollers, to which the raw powder mixture is continuously supplied and at one end of which the gelatinized mass is continuously removed and immediately continuously granulated. The resulting granulate is continuously delivered to an extruder by means of which it is moulded into powder strands which are worked up into the finished powder by cutting and an end treatment. The process requires only small quantities of powder within the kneading equipment and thus provides a safe and efficient continuous manufacturing facility.Type: GrantFiled: June 16, 1988Date of Patent: October 16, 1990Assignee: WNC-Nitrochemie GmbHInventors: Gunther Niedermeier, Helmut Pausch, Wolfgang Miehling, Jurgen Knobloch, Wolfgang Helmich