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| Number | Title | Issue Date |
| 7645814 | Core material A method for the production of cores and molds for casting molds, based on a base molding material and an organic or inorganic binding agent and an additive. According to the method, pre-forming substances are used in order to dispense with the use of sizing substan... | 01/12/2010 |
| 6460603 | Apparatus for the uphill low pressure casting of metals, particularly light metals An apparatus for uphill low pressure casting of metals in split sand moulds and having a sprue in one of the two moulds, to which can be connected the casting tube of a melt container and which is connected to the lowest area of the mould cavity, and havi... | 10/08/2002 |
| 5428199 | Frame member for supporting a workpiece in a machine tool A frame member, comprising a pair substantially parallel base members connected by a pair substantially parallel intermediate members extending therebetween, has its base members formed of the same material as the machine bed wherein the material is a cas... | 06/27/1995 |
| 5348070 | Process for the compression of molding sand for casting molds The invention relates to a process for the compression of molding sand in casting molds having a pattern plate with a pattern arranged therein. The molding sand is introduced loosely into the molding space located above the pattern plate and is thereafter... | 09/20/1994 |
| 5329985 | Method and apparatus for the individual marking of green sand molds A method and an apparatus for marking green sand molds are proposed, in which the surface of the sand is individually marked by means of an identification once compacting of the molds in the mold cavity has taken place, in such a way that the marking is t... | 07/19/1994 |
| 5290387 | Device for welding tubular components of plastics material A device for manufacturing a welded connection of tubular components of plastics material. The ends of the components to be connected are axially aligned and held to abut with the end surfaces. The ends of the tubular components can be heated by a foldabl... | 03/01/1994 |
| 5280821 | Molding apparatus including vents comprising elongated slotted bars The molding apparatus includes a pattern plate carrier for air-pressurized compaction processes. The carrier is equipped with air venting structure running along the inner contour of the mold box of the sand molding apparatus in the form of elongated slot... | 01/25/1994 |
| 5261479 | Molding machine with pattern venting An apparatus for producing sand mold employing compressed air comprises a sand molding apparatus for use in making sand molds by employing compressed air. The apparatus includes, in the preferred embodiment, a pattern plate carrier having a top surface fo... | 11/16/1993 |
| 5241157 | Arrangement for butt-welding plastic material components An arrangement for butt-welding tubular plastic components includes two chucking devices for holding the components in coaxial positions relative to each other and a heating device for heating the ends of the components without contact. The heating device... | 08/31/1993 |
| 5238571 | Arrangement for separating entrained particles from a stream of molten metal A method and a particle absorber for separating off entrained particles from a stream of molten metal are proposed. The particle absorber has a multiplicity of surfaces within the metal stream produced by means of mechanical separation. This separation le... | 08/24/1993 |
| 5232014 | Check valve A check valve includes a spherical closing member arranged in a flow duct of a valve body. The flow duct includes guide ribs with stop surfaces. The spherical closing member is displaceable by medium flowing through the valves between the stop surfaces an... | 08/03/1993 |
| 5219123 | Process for the selective reclamation treatment of used foundry sand A process for the selective reclamation treatment of used foundry sands wherein separation of parts of the binding materials from the basic granular material is effected by mechanical means and, thereafter, the sand grains are accelerated to produce an ab... | 06/15/1993 |
| 5217658 | Method for repairing a hot-blast long-time cupola furnace A method for repairing a hot-blast, long-time cupola furnace by removing residual slag and relining the cupola furnace including feeding liquid nitrogen to the cupola furnace immediately at the end of a smelting operation and simultaneously with the feedi... | 06/08/1993 |
| 5184850 | Method of connecting pipes of plastics material of a double pipe system and a pipe connection made by the method A method of connecting pipes of plastics material of a double pipe system and a pipe connection made by the method. The inner pipes of the pipe system are connected to each other with a sleeve member by welding or gluing. Clamping jaws are used for holdin... | 02/09/1993 |
| 5172748 | Device for the batch-wise preparation of loose material An impact rotor arranged concentrically to the axis of a drum has preferably four beating blades which are wave-shaped on the outer peripheral side.... | 12/22/1992 |
| 5167270 | Method for the treatment of foundry sand and/or core sand A method for the re-processing of used foundry sand comprises a two cycle system including a conventional processing system for foundry sand and a second locally independent regeneration system for the recovery of the usuable components of the used sand s... | 12/01/1992 |
| 5163562 | Process for reclaiming bentonite and carbon particles from used foundry sand A process for separating bentonite and carbon carrier particles from an air-dust mixture generated from a mechanical used-sand reclamation unit and, more particularly, a process as aforesaid wherein the bentonite and carbon carrier particles are recycled ... | 11/17/1992 |
| 5163496 | Process for treating old foundry sand for reuse in place of core sand The present invention relates to a process for treating old foundry sand for reuse in place of core sand wherein the precleaned sand grains are subjected to further abrasive-thermal treatment so as to volatize and remove basic constituents adhering to the... | 11/17/1992 |
| 5161596 | Method for compressing granular molding materials Foundry moldings are manufactured in an economic manner without increasing cycle time comprises a 3-stage method including the steps of feeding the molding material by means of compressed air into a molding container and thereafter precompressing the mold... | 11/10/1992 |
| 5142911 | Device for measuring the strength of pieces of compressed molding material A device for measuring the strength of pieces of compressed molding material. The device includes a probe pin and a stop surface arranged on the housing. On the end of the housing opposite the probe pin is arranged a cover for replacing batteries arranged... | 09/01/1992 |
| 5115985 | Method for the regenerative treatment of mainly clay-bound foundry old sand A method for regenerating foundry old sand which method combines impact and shearing stress of the sand grains which occurs with simultaneous dust removal. The dust removed by suction contains non-burned bentonite and carbon parts which can be re-used in ... | 05/26/1992 |
| 5108496 | Method for the concentration of dusts in a cupola furnace with metal particles A process for the econimic recovery of metallic fractions generated during operation of a cupola furnace comprises the steps of the separating filter dust containing metal fractions from an off-gas stream and recirculating the metal fraction back to the c... | 04/28/1992 |
| 5103894 | Process for the treatment of clay-bonded used casting sand The clay-bonded used casting sand is treated in a drum rotated about a horizontal axis by continuously feeding a sand additive to the drum in an amount sufficient to maintain the quantity of sand in the drum at about 26-40 percent by volume of the drum to... | 04/14/1992 |
| 5100217 | Wheel bearing The proposed wheel bearing has a hub 1 mounted on the preferably integral bearing shaft 4 of a wheel part 5. The hub 1 rotates on a ball bearing arrangement 2. The ball bearing inner ring or rings 3 are stressed via a washer 10 against a shoulder 6 on the... | 03/31/1992 |
| 5100110 | Treatment vessel for the treatment of molten metal melts The present invention relates to a method and apparatus for the treatment of molten metals with a volatile treating agent and, more particularly, a method and apparatus for treating molten metal with magnesium in the form of pure magnesium or magnesium al... | 03/31/1992 |
| 5098651 | Magnesium treatment process and apparatus for carrying out this process A magnesium treatment process is proposed for the production of a treated iron melt containing less than 100 grams per ton non-metallic inclusions. The treatment reaction is so arranged that the magnesium is introduced into the melt from a chamber at a de... | 03/24/1992 |
| 5091624 | Method of flash butt welding high-carbon material, in particular nodular cast iron A method of flash butt welding high-carbon materials, in particular nodular cast iron wherein the arcing craters produced by intermitting contact of the contact faces have a maximum roughness depth RT such that this roughness depth lies within ... | 02/25/1992 |
| 5087308 | Method of connecting pipes of plastics material of a double pipe system A method of connecting pipes of plastics material of a double pipe system and a pipe connection made by the method. The inner pipes of the pipe system are connected to each other with a sleeve member by welding or gluing. Clamping jaws are used for holdin... | 02/11/1992 |
| 5070797 | Process and device to feed additives into a shaft or cupola furnace A process and device for introducing additives, in particular energy carriers, into a cupola or shaft furnace. The additive is carried with combustion air stream and introduced therewith in the furnace shaft, a depression being created at the point where ... | 12/10/1991 |
| 5067691 | Ball cock A ball cock including a housing of a thermoplastic material. The housing is composed of two parts which are integrally connected to each other. A ball plug is made integrally with a pivot of plastics material. The pivot is mounted in a bore extending tran... | 11/26/1991 |
| 5037500 | Method and apparatus for joining tubular plastic parts by welding A heating arrangement (2) embracing tubular parts (1a, 1b) of plastic material which have to be joined by welding, comprises electrically heatable jaws (26). A bladder (50) expandable by compressed air is arranged inside the tubular parts (1a, b), which i... | 08/06/1991 |
| 5024161 | Molding apparatus A forming apparatus for the manufacture of casting molds made from sand or another moldable mixture by means of a pressure shock wave from a gaseous medium is proposed. The forming apparatus comprises a structural frame constructed from columns, cross bea... | 06/18/1991 |
| 5003880 | Process for the impact healing of inner discontinuities or defects in the sub-surface region of a cast component A process for the impact healing of inner discontinuities or defects in the surface area of a cast workpiece where the defects are localized comprises locating an explosive charge on the surface of the workpiece over the inner discontinuities or defects a... | 04/02/1991 |
| 4982778 | Molding process and apparatus A molding process and an apparatus wherein the molds produced in a molding machine are sent past a casting apparatus where casting takes place. Thereafter, the molds with the molding boxes surrounding them, pass through a primary cooling line, at the end ... | 01/08/1991 |
| 4969972 | Device for welding tubular components of thermoplastic material A device for welding tubular components of thermoplastic material. The device includes a heating device for generating the necessary melting temperature arranged at the circumference and at the abutting ends of the tubular components. The bag or casing is... | 11/13/1990 |
| 4968054 | Coupling The present invention relates to a hitching device with automatic coupling, applicable in particular to the joining of automotive tractors to their trailers. This device consists essentially of a fork, in which the pulling member arranged on the tractor e... | 11/06/1990 |
| 4943411 | Process for treating molten iron with magnesium additions A process for treating molten cast iron with pure magnesium wherein a granular mixture of magnesium granules admixed with granules of refractory material is flooded with molten iron. By employing granular refractory material of controlled size in the gran... | 07/24/1990 |
| 4927642 | Apparatus for welding tubular components of thermoplastic material An apparatus for welding tubular components of thermoplastic material. The apparatus includes a heating device for heating the ends of the tubular components to be welded together until the melting range of the thermoplastic material is reached. Two outer... | 05/22/1990 |
| 4925218 | Double-walled pipeline system A double-walled pipeline system for flow media with an inner pipeline conduit including fittings, such as, T-pieces, angles, or bends, and instruments, such as, valves, stopcocks, etc., and with an outer pipeline conduit arranged concentrically to the inn... | 05/15/1990 |
| 4921035 | Process for compacting powdery materials A process for compacting powdery materials is initiated by a pressure surge in which a surge G1 acts at a time t1 on the surface of the powdery material and, at the same time, a surge G2 is applied at a time t2 ... | 05/01/1990 |
