Bizarre Patents
A method of swing on a swing is disclosed, in which a user positioned on a standard swing suspended by two chains from a substantially horizontal tree branch induces side to side motion by pulling alternately on one chain and then the other.
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| Number | Title | Issue Date |
| 4283835 | Cambered core positioning for injection molding Disclosed is a system for precisely locating a cambered ceramic core within the cavity of an injection molding die, such as is used to form patterns for lost wax method casting of gas turbine airfoils. A combination of at least two independent sets of loc... | 08/18/1981 |
| 4276922 | Plug mold assembly A method of forming a mold for use in casting is disclosed. The method includes as a first step forming a positive pattern having a surface the shape of a part to be cast. Next a negative partial pattern is formed having a casting surface complimentary to... | 07/07/1981 |
| 4249591 | Apparatus for making dental bridgework The specification discloses a tooth-shaped member including a central insert which is removable from a facing in order to make the supporting framework for a dental bridge. An appropriate size and shape of a tooth-shaped member is selected and aligned in ... | 02/10/1981 |
| 4243093 | Method of making an insulated manifold with double cast walls A composite article and method of forming the same wherein an inner casting is separated from an outer casting by an insulative portion defining the pattern for the outer surface of the inner casting and the pattern for the inner surface of the outer cast... | 01/06/1981 |
| 4231413 | Assembly for and method of making mold and casting of one-piece impellers A method of preparing an assembly and an assembly useful in making a mold for casting one-piece impellers in which a master model of one of the vanes of the impeller is made in a polished metal having, on its inner end a shoulder with a height and depth a... | 11/04/1980 |
| 4231982 | Method for the production of tools for deep drawing, moulding, extruding and the like An exact replica of a tool for deep drawing, moulding, extruding and the like is manufactured by a method according to the present invention by thermally spraying the wearing surface of the tool to be produced onto a negative replica of the tool to be pro... | 11/04/1980 |
| 4220190 | Method of making tooling A method of producing cast metal tooling, especially injection molds or dies, characterized by the steps of making a thin walled, investment cast shell which defines the functional cavity surface of the tooling, and casting a suitable backing metal agains... | 09/02/1980 |
| 4208029 | Core apparatus An annular member is integrally positioned within a core portion so that a side surface of the annular portion coacts with the outer surface of the core portion to form a substantially smooth and continuous outer surface of a core. A substantially inexten... | 06/17/1980 |
| 4197899 | Method of casting a low weight reciprocating engine An internal combustion V-8 engine is disclosed having an aluminum semi-permanent mold head cast by a low-pressure die-cast process and an iron block cast by the evaporative casting method. The block and head have controlled thickness walls throughout to o... | 04/15/1980 |
| 4190093 | Vibration welding of expanded bead polystyrene A method of making a composite consumable pattern for use in the cavityless type of metal casting is disclosed. At least two mateable pattern parts are formed entirely of a low density expanded closed-cell polymeric material which is ignitable upon contac... | 02/26/1980 |
| 4160313 | Method of making a wax pattern for a shell mould A wax former and runner are moulded with complementary stud and socket members included in the respective moulds. The former and runner are then assembled simply by pressing stud into socket, thus avoiding loss of dimensional accuracy which would have occ... | 07/10/1979 |
| 4139046 | Turbine wheel pattern and method of making same A method is presented to make an investment casting pattern of a rotatable turbine wheel or a stationary turbine nozzle wheel having one continuous and regular series of blades extending around its periphery with a uniform pitch between blades and in whic... | 02/13/1979 |
| 4126651 | Production of plaster molds by microwave treatment Metal casting components, e.g. molds and cores, are produced from a compacted mass of plaster by microwave treatment while shielded by a heat insulating medium, e.g. glass fiber matting, which freely transmits microwave radiation as well as water vapor an... | 11/21/1978 |
| 4111252 | Method for making molds and mold components for casting single crystal metallic articles Disclosed is an improved method for making molds and mold components for use in casting single crystal articles. According to the improved method, a preformed and reusable replica of a mold growth cavity and crystal selector passage is provided, the repli... | 09/05/1978 |
| 4062396 | Method of making a unitary pattern assembly This invention involves a method of making a unitary pattern assembly which is useful in forming investment shell molds for the conventional and directional solidification of molten metals and alloys. It comprises providing a fixture having first and seco... | 12/13/1977 |
| 4061175 | Pattern assembly and method of making the same For use in the lost pattern process of investment casting, an improved pattern assembly of the type having a pattern supporting center tree or sprue member including a rigid tube surrounded by a sleeve made of a flexible material, characterized by longitu... | 12/06/1977 |
| 4055213 | Method for making patterns A method is provided for making a pattern comprising a metallic outer shell filled with a fill material. The method includes the steps of first forming a pattern of relatively soft material, then forming a shell as, for example, of plastic, around said wo... | 10/25/1977 |
| 4044815 | Precision investment casting mold, pattern assembly and method A precision investment casting ceramic mold of the self-casting type is made as a unitary mold by providing separately a pattern for a wax charge-holding assembly and a pattern for a wax article casting assembly, each including an alignment portion. The t... | 08/30/1977 |
| 4016922 | Method and apparatus for feeding granulated material Method and apparatus are disclosed for cyclically metering charges of a granulated wax-like or resinous material from a bulk supply and feeding such metered charges into a heated, pressurized reservoir. Each charge of the granulated material is fluidized ... | 04/12/1977 |
| 4015654 | Adjustable tooling method and apparatus for investment patterns A pattern representing the airfoil section of a stator vane is located on a supporting block adapted to be received in a casting fixture. A locating block is also provided in the casting fixture in spaced relation to the airfoil pattern on the supporting ... | 04/05/1977 |
| 4014090 | Pattern plates and method of making same Method of producing plates having an identical configuration of valleys and lugs thereon so that one plate is interchangeable with another. Flat plates are provided with a pair of individual holes at opposite ends of the plate center line. Thereafter one ... | 03/29/1977 |
| 3991809 | Method of molding finger rings A method of molding finger rings of the type having a hollowed-out interior portion, but whose exterior surfaces are identical to rings without such hollowed-out portion comprising securing a wax, shell ring pattern to the exterior surface of a wax, tubul... | 11/16/1976 |
| 3985176 | Unitary pattern assembly method This invention involves a method of making a unitary pattern assembly which is useful in forming an investment shell mold having an integral base for the conventional and directional solidification of molten metals and alloys. It comprises providing a yok... | 10/12/1976 |
| 3982934 | Method of forming uniform density articles from powder metals The present invention provides a method and apparatus for powder metal formation in which a plated shell is formed corresponding to the appropriate calculated pre press size of the final part being formed; the electroplate shell is filled with powder meta... | 09/28/1976 |
| 3954132 | Manufacture of cast ferrous metal dies A method of manufacturing a cast ferrous metal die wherein an initial die of non-ferrous metal is cast in a mould against a basic metal pattern having a melting point substantially not less than that of the non-ferrous casting metal, the basic metal patte... | 05/04/1976 |
