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| Number | Title | Issue Date |
| 7270171 | Evaporative foam risers with exothermic topping This invention consists of the use of an evaporative foam riser made with expanded polystyrene and with a cavity on top that contains an exothermic mixture. The reaction of the exothermic material, which is set off when it comes in contact with the metal, prolongs t... | 09/18/2007 |
| 7147032 | Process and apparatus for assembly of wax trees In a process for the assembly of wax trees, a wax runner is placed in a flat position, and a wax pattern is located adjacent to the wax runner. Both the wax pattern and the wax runner are heated and then placed in contact with one another where heated. Then the wax ... | 12/12/2006 |
| 7118085 | Retort system A method for producing dental restoration components includes filling a retort cylinder of a retort system with a forming mass, the retort cylinder being at least partially encircled by a charging body, and hardening the forming mass. After the hardening of the form... | 10/10/2006 |
| 6910519 | Process and apparatus for assembly of wax trees A process for the assembly of wax trees in which a wax runner is placed in a flat position and a wax pattern is located adjacent the wax runner. Both the wax runner pattern and the wax runner are heated and then are placed in contact with one another where heated. T... | 06/28/2005 |
| 6892789 | Solid investment molding system and method A lost wax molding system has a re-usable, collapsible, chain-linked mesh exoskeleton, one or more inserts to be placed within the interior surface of the mesh exoskeleton to exert outward pressure on the mesh exoskeleton thereby creating a pre-formed, rigid, three-... | 05/17/2005 |
| 6883580 | Apparatus and improved method for lost foam casting of metal articles using external pressure An apparatus and method to delay the application of pressure on a molten metal front to equalize a pressure gradient present at the molten metal front during pressurized lost foam casting processes, or other pressurized casting processes. A pressure equalization mem... | 04/26/2005 |
| 6770681 | Foamable copolymer resin and a method for preparing the same The application relates to a foamable copolymer resin and a process for preparing the same, which comprises firstly adding an organic peroxide initiator, a modifying aid and a foaming agent to a mixed monomers of methyl methacrylate and styrene so as to constitute a... | 08/03/2004 |
| 6648056 | Fingerprint jewelry A fingerprint jewelry includes any jewelry with a person's fingerprints cast in relief onto its surface. It is made by pressing a finger on a sheet of pliable wax medium to imprint it with fingerprints in relief. In a first embodiment, the wax medium is c... | 11/18/2003 |
| 6502621 | Processes for forming styrene/methyl methacrylate copolymers Copolymers are formed by suspension polymerization of monomers, including one or more styrenic monomers, and methyl methacrylate. The polymerization can be carried out in the presence of one or more blowing agents, producing polymers that can be expanded.... | 01/07/2003 |
| 6497269 | Processes for forming styrenic copolymers Copolymers are formed by suspension polymerization of monomers, including one or more styrenic monomers, and one or more acrylic monomers. The monomers can be polymerized in the presence of polymeric seeds. The polymerization can be carried out in the pre... | 12/24/2002 |
| 6478074 | Method for the production of a steel camshaft and camshaft produced according to said method The invention relates to a camshaft made of cast steel having an inner cavity with a cylindrical inner shape, especially a profiled cylindrical inner shape produced rationally according to a lost-foam casting method known per se. A steel camshaft thus pro... | 11/12/2002 |
| 6415846 | Turbochargers A method of manufacturing a turbocharger including a housing with a compressor housing portion, turbine housing portion, and a connecting portion is such that an appropriate attitude setting for various portions is preselected, and the housing is then man... | 07/09/2002 |
| 6382300 | Casting having an enhanced heat transfer, surface, and mold and pattern for forming same A casting includes a heat transfer surface having a plurality of cavities. The plurality of cavities include a density of at least about 25 cavities per square centimeter to about 1,100 cavities per square centimeter resulting in increased surface area an... | 05/07/2002 |
| 6360807 | Processes for forming styrenic copolymers Copolymers are formed by suspension polymerization of monomers, including one or more styrenic monomers, and one or more acrylic monomers. The monomers can be polymerized in the presence of polymeric seeds. The polymerization can be carried out in the pre... | 03/26/2002 |
| 6343642 | Riser sleeve A riser sleeve has a sleeve body and an evaporative pattern fit into the sleeve body to pass through a side wall thereof. The evaporative pattern is shaped to enable the casting, integrally with the riser cast by the sleeve body, of a projecting portion c... | 02/05/2002 |
| 6298904 | Vent-forming apparatus for metal casting and method A vent-forming apparatus for use in metal casting comprises a gas-permeable membrane with a lead-in tube attached to one surface and a breather tube attached to the opposite surface. The vent-forming apparatus may be used to create independent vents in th... | 10/09/2001 |
| 6263950 | Lost foam casting using dimensionally self-stabilized pattern The method of lost foam casting uses a polystirene foam pattern molded from polystirene beads preexpanded from raw polystirene beads that have a raw bead diameter in the range of about 0.1 to about 0.6 millimeters and that include isopentane as a relative... | 07/24/2001 |
| 5979537 | Wax replica and soluble core insert used for producing hollow jewelry ring A soluble wax core insert to be used in making a wax replica of a hollow metal jewelry ring has an inner round radius design and an arcuate portion having an arcuate extent of at least 140°. The soluble wax core insert is formed by molding in a metal mol... | 11/09/1999 |
| 5960851 | Method of lost foam casting of aluminum-silicon alloys An improved method of lost foam casting of aluminum silicon alloys utilizing a pattern formed of an expandable polymeric foam having a decomposition temperature less than 300° C., and a heat of decomposition less than 600 Joules per gram. The foam patter... | 10/05/1999 |
| 5944948 | Apparatus for assembling a pair of members Assembling and adhering two component parts of a lost foam pattern comprises placing each of the two components on separate supports which initially face in the same direction, following which one of the supports and the component supported thereby are ro... | 08/31/1999 |
| 5857512 | Jewelry models and an improved jewelry model produced therefrom A nail polish or nail polish/enamel composition is applied to imperfections, errors, distortions or porosities in the model. The composition is thus used to correct the model's shape. The composition can be added at room temperature, and avoids the need t... | 01/12/1999 |
| 5839499 | One-shot multi-color gold casting apparatus and casting tree The apparatus includes a rubber base with two inlets, a two-chamber ceramic crucible with two identical outlets, and a model of the jewelry item with two sprues connected to two separate tree stems, with each sprue connected to a separate stem thus ensuri... | 11/24/1998 |
| 5791395 | One shot multi-color metal casting method Method of multi-color jewelry items production is based on a simultaneous casting of two metal alloys of different colors (yellow-red, white-yellow, etc.), as well as two different metals, with a purpose of obtaining jewelry art-works of high-quality and ... | 08/11/1998 |
| 5749411 | Spruing assembly A spruing assembly for receiving investment material in the production of an investment mold for castings by the "lost wax" process which includes a hollow chamber to receive the investment material. Included within the chamber is one or more sprue for su... | 05/12/1998 |
| 5595235 | Outboard motor exhaust housing and lost foam pattern therefor Disclosed herein is a one piece drive shaft housing comprising a casting including an outer surface having an upper end surface, a lower end surface, and an endless side surface extending between the upper and lower end surfaces, an internal cavity extend... | 01/21/1997 |
| 5393486 | Method for making orthodontic appliance having textured bonding surface A method of making an orthodontic appliance such as a bracket includes the step of forming a preform of molding material while a portion of the molding material is in contact with a textured portion of a web. The web is subsequently degraded by a thermal ... | 02/28/1995 |
| 5372176 | Method and apparatus for producing housing having a cast-in-place insert using lost foam process A method for casting a housing and insert assembly including a housing and a cast-in-place insert. The casting method comprises the steps of providing a prefabricated insert, surrounding the insert with an evaporable foam pattern to form a pattern and ins... | 12/13/1994 |
| 5285839 | Internal combustion engine and method for making same A lost foam pattern assembly comprising a crankcase section including first and second mounting surfaces, a right cylinder section which is fixed to the first mounting surface and which includes a primary locator, a left cylinder section which is fixed to... | 02/15/1994 |
| 5277241 | Lost modeling-compound casting pattern and method of preparing it The shape-dictating surfaces of the pattern are constituted by a thin self-supporting shell (4 & 5) of photocured polymer. The shell is produced by a laser controlled by a computer with reference to a design drawing. The inside of the shell is packed full... | 01/11/1994 |
| 5143143 | Multipiece foam pattern for making hollow casting having an integral hose connection A cast tubular structure including an integral hose connection element formed thereon is produced by lost foam casting wherein a circular socket seat is formed on a pattern for a body portion of the cast tubular structure and a cylindrical pattern for the... | 09/01/1992 |
| 5121787 | Evaporable foam pattern for casting a thermostat housing for a V-type marine engine The pattern, composed of a polymeric material, is formed of three sections joined together by an adhesive along a pair of parallel parting lines. One parting line lies in a plane extending through the axis of an outlet to the engine block and through the ... | 06/16/1992 |
| 5119882 | Evaporable foam pattern for casting an engine block for a two-cycle engine having a direct charge system An evaporable foam pattern for casting a metal engine block for a two-cycle engine having a direct charge system. The pattern includes a block pattern section having a head end and a crankcase end and a plurality of cylinders extend between the ends. A tr... | 06/09/1992 |
| 5088545 | Evaporable foam pattern for use in casting a metal engine block having a loop charge system An evaporable foam pattern for casting a metal block for a two-cycle engine. The pattern includes a first pattern section formed of a polymeric material and defining at least one cylinder. The first pattern section has a plurality of elongated slots each ... | 02/18/1992 |
| 5054537 | Lost foam pattern assembly for V-block engine Disclosed herein is a lost foam pattern assembly comprising a crankcase section including first and second planar surfaces intersecting at an angle defined therebetween, a port cylinder section fixed to the first surface of the crankcase section, and a st... | 10/08/1991 |
| 5038847 | Evaporable foam pattern for use in casting a crankshaft A pattern for use in casting a rotatable shaft, such as a crankshaft for an internal combustion engine. The pattern includes an evaporable foam pattern section composed of a material such as polystyrene and having a configuration conforming to the cranksh... | 08/13/1991 |
| 5035276 | Evaporable foam pattern assembly for casting a housing for a rotary engine An evaporable foam pattern assembly for casting a housing for a rotary engine. The pattern assembly includes a central rotor chamber pattern section and a pair of end pattern sections which, in the cast engine, are mounted on either side of the central se... | 07/30/1991 |
| 5031685 | Internal combustion engine and method for making the same A foam pattern assembly for use in forming an engine block in a lost foam casting process, the pattern assembly comprising a base portion including a generally planar front mounting surface having therein a plurality of crankcase-defining cavities and a p... | 07/16/1991 |
| 5018568 | Lost foam engine block pattern A lost foam pattern for an engine block includes a cylinder and an axially extending transfer passage defined by spaced side walls and an inner wall which is outwardly convex. The pattern further includes a first pattern piece including a wall defining a ... | 05/28/1991 |
| 4977945 | Full mold comprised of a plastic foam material A full mold for casting contains a plastic foam material lost pattern. The plastic foam material is substantially sulfur-free and can advantageously be used to provide iron alloy-based full-mold cast pieces of high quality.... | 12/18/1990 |
| 4972897 | Spiral sprue loop Apparatus useful in forming a mold from a wax pattern in an investment casting process, the invention provides a loop element having arm elements which spiral downwardly from and inwardly of the loop element to a base element. Sprue pins mount wax pattern... | 11/27/1990 |
