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| Number | Title | Issue Date |
| 5714080 | Self-actuating molds for vertically casting concrete pipe A gated mold for casting concrete pipe requires no wedges or bolts for securement. A core mold may be contracted by lifting at an actuation point, and expanded by resting on a base ring. An external mold may be expanded by lifting at an actuation point, a... | 02/03/1998 |
| 5679279 | Collapsible core seam cover for concrete making apparatus A shield or cover combined with a collapsible core used in machines for making concrete pipe lined with a plastic liner. The cover is mounted on the outside of the core between the core and the liner and extends the full length of the seam between the sta... | 10/21/1997 |
| 5338498 | Method for formwork, and dismantling of formwork, of walls of poured material raised above a reference surface, and means for employment of this method A method for assembly and disassembly of formwork for walls (1) of poured material raised above a reference surface (2) using boards (3) each including a shuttering face (4) and equipped with wheels (31, 32) at their base. Assembly includes from an unshut... | 08/16/1994 |
| 5279491 | Molding apparatus including core for molding zero-draft hole A molding apparatus including at least two mold parts movable relative to each other between an open position and a closed position, the mold parts defining, when in the closed position, a mold cavity having the shape of an object to be molded, and an exp... | 01/18/1994 |
| 5215761 | Apparatus for production of longitudinal multi-component frame element An apparatus for producing a longitudinal multi-component frame element includes a longitudinal mold within which is positioning at least one longitudinal member to form a first component of the frame element. A second component of the frame element is fo... | 06/01/1993 |
| 5139404 | Apparatus for making lined pipe An apparatus for making concrete pipe having vinyl liners. An expandable core is used to hold a tubular vinyl liner. The core has over-center latches which lock the core in an expanded position to hold the liner against the outside surface of the core. Th... | 08/18/1992 |
| 5137251 | Pour window for a concrete form A pour window for a metal concrete form flexible to a predetermined arcuate shape. A window panel of a generally rectangular shape forms part of a door which is pivotally mounted at one edge thereof for movement between an open and a closed position there... | 08/11/1992 |
| 5125617 | Adjustable radius walers for forming Forms for a cylindrical wall of poured concrete are made of plywood sheets nailed to horizontally-spaced beams, to which are clamped transversely arranged walers. The walers are assembled in strings and the string are in parallel spaced relationship. The ... | 06/30/1992 |
| 5067686 | Annular base mold A unitary, molded, concrete stabilizing base for refuse cans and the like, and method and apparatus for its manufacture are described. The base takes the form of a concrete annulus having a right-triangular cross section and an inner diameter dimensioned ... | 11/26/1991 |
| 5029803 | Device for adapting a formwork element to given radii of a circular formwork The present invention provides for a device for adapting a formwork element, including a formwork lining and at least two formwork beams, to a given curvature of circular framework. A device includes a web engaging a space between two formwork beams and a... | 07/09/1991 |
| 5006055 | Apparatus for manufacturing an otoplastic An apparatus for manufacturing an otoplastic. An otoplastic is manufactured directly in the ear of a hearing-impaired person in that a deformable envelope is pulled over a die or over a shell or over an overlayed over-shell. This apparatus is then supplie... | 04/09/1991 |
| 4998705 | Apparatus for forming voids in concrete An apparatus for forming voids in concrete which includes baseplates secured to a wood supporting deck or form for a concrete floor by a plurality of removable screws and a removalbe sleeve attached to each baseplate and having a height generally equal to... | 03/12/1991 |
| 4954209 | Apparatus for producing molded articles The invention is an apparatus for molding an article made of layed up materials having opposed principle surfaces, such as one that is hollow tubular shaped. In detail, the invention includes a first mold part for forming one surface of the article on whi... | 09/04/1990 |
| 4917346 | Concrete form shuttering A form for erecting structures having an plan shape, any generatrix and possibly changing wall thickness includes an inner form (1) and an outer form (2). Circumferentially closed support rings (5,6) are arranged horizontally spaced from the inner form as... | 04/17/1990 |
| 4878597 | Lyophilization containers The invention provides containers useful for freezedrying of biological and other materials which can be advantageously subjected to a lyophilization process, such materials including proteinaceous materials from which moisture is removed in order to pres... | 11/07/1989 |
| 4874150 | Segmental formwork for round structures A segmental formwork for round structures has a framework consisting of soldiers (6) and polygonal stretchers (5) that can be adjusted angularly at the corner points. The formwork boards (12) of the formwork shell bear directly against the stretchers (5) ... | 10/17/1989 |
| 4799982 | Method of molding monolithic building structure Methods of manufacturing a modular, monolithic, integrated, multi-layered, mold building structure including the steps of constructing a dismantleable mold having an outer rigid matrix and an inner inflatable plug, wherein the inside dimensions of the mat... | 01/24/1989 |
| 4790508 | Concrete casting form including retractable core A core form is disclosed for casting a structurally reinforced concrete structure for use on a slab with an outer container form having rigid walls extending vertically comprising a casting core positioned internal the outer form and having vertically ext... | 12/13/1988 |
| 4742985 | Formwork assembly for a poured concrete structure A formwork assembly for a poured concrete structure includes a plurality of formwork panels and girder-like members for supporting the panels. The panels comprise a concrete surface forming sheet and laterally spaced flange-like support members on the out... | 05/10/1988 |
| 4729541 | Formwork for round or polygonal construction There is disclosed a formwork for round or polygonal constructions with a formwork face having an adjustable curvature or circumference. The formwork has a chain of booms which are spaced apart from the formwork face and are composed of individual boom po... | 03/08/1988 |
| 4621787 | Prestressable passage core In a method of using an elongate steel core for making passages in a body of castable material, preferably concrete which is cast in an outer mould, the core is prestressed prior to casting, and to disengage the core from the finished body, the prestress ... | 11/11/1986 |
| 4619433 | Apparatus for erecting arcuate walls of concrete or the like Apparatus for erection of arcuate walls of poured concrete has one or more deformable sheathings secured to turnable supports which are movably secured to one another by composite girders having alternating rigid variable-length links and fixed-length con... | 10/28/1986 |
| 4318880 | Method and apparatus for forming manhole bases The invention provides for a process for constructing manhole assemblies in an excavation or elsewhere, by the utilization of an outer form, a preformed manhole barrel which is positioned and propped within the outer form pipe stub inserted partially into... | 03/09/1982 |
| 4201361 | Concrete form component The invention relates to a formwork component for use in concrete construction for the formation of a recess in a wall or ceiling, the component comprising a hollow body defining a central axis, the body having a resilient wall and at least one spreader m... | 05/06/1980 |
| 4153232 | Apparatus for actuating inner and outer forms of a concrete pipe forming mold A concrete pipe molding apparatus includes inner and outer mold forms defining an annular chamber therebetween. The outer form comprises first and second form sections. These sections are completely separable along two longitudinal gates. A clamp assembly... | 05/08/1979 |
| 4134569 | Automatic core gate A gate for opening and closing a longitudinal joint of a core used in casting concrete pipe has a pair of hinge plates pivotally connected to each side of the core adjacent the joint. A pair of over-center links pivotally connect to the hinge plates and t... | 01/16/1979 |
| 4119695 | Method and apparatus for forming hollow concrete elements A method and a device to cast elongate concrete structural members formed internally with channel means in horizontal moulds. The channel means is formed by a double-wall inflatable hose of an elastic and flexible material which is introduced into the mou... | 10/10/1978 |
| 4093175 | Distensible elastomeric molds Molding apparatus for molding articles without a seam or parting line even though the articles may have severe backdraft portions. The apparatus includes a flexible mold of relatively thick and self-supporting wall construction which is deformable by the ... | 06/06/1978 |
| 4060218 | Pneumatically controlled rigid core-former A form assembly which may be used to provide a core portion in a concrete or other cast structure. A pair of former elements having interfitting hooks and flanges which are normally urged apart by a resilient sleeve which fits over the former elements. Th... | 11/29/1977 |
| 4003545 | Core means having a rubber liner A core member used in a moulding flask for making prefabricated concrete products, comprising a hollow tubular member of predetermined size having all outer surfaces intended to be in contact with concrete mixture covered by a thin layer of rubber plate.... | 01/18/1977 |
| 3952990 | Container type molding device of matched segments A molding device including a rigid container defining a molding chamber and a mating collapsible member with walls and a floor and of a normal size and shape to mate in the rigid container and define a molding space between the container and the collapsib... | 04/27/1976 |
