Abstract: A mold for a grooved hollow point bullet having a pair of separable mold halves which are mounted in a bullet molding apparatus for movement between a closed position and an open position. Each mold half has a flat parting surface which has a bullet shaped groove and an elongated shallow groove which extends from the bullet shaped groove to one end of the mold half. When the mold halves are in the closed position so that the parting surfaces of the mold halves abut, the bullet shaped grooves of the mold halves combine to form a bullet shaped cavity and the elongated shallow grooves combine to form a bore which leads from the bullet shaped cavity to the end of the mold. An elongated pin for forming a hollow point bullet is mounted on one of the mold halves so that it extends through the bore and into the bullet cavity.

Abstract: A retainer mold for forming foamed automotive articles, particularly instrument panels, after a thin vinyl skin shell has been mounted in the mold. The mold includes a plurality of die block assemblies mounted in recesses formed in a surface of the mold cavity. Each die block assembly includes a plate member secured in the recess, and a die block slidably mounted within controlled limits on the plate member, and adapted to be covered by the shell and to be moved as required to prevent wrinkling or bridging of the portion of the shell extending between adjacent die blocks.

Abstract: A plumbing concrete form accessory (10) includes a relatively large hollow displacement member (12) having a hole (18) in a wall thereof and defining a sleeve (19) about the hole for snugly fitting the outside surface of a pipe (48). A dissolving type adhesive is used to adhere the sleeve adjacent a first end (50) of the pipe and a second end (52) of the pipe is mounted to a concrete form (58) by means of a slidable flange (54) which is also adhered to the outside surface of the pipe. A spacer cuff (60) is mounted snugly about the outside surface of the pipe adjacent the second end thereof. The thusly mounted pipe supports the hollow displacement member in the concrete form while concrete (22) is poured about the pipe and the displacement member. In a preferred embodiment, a cover (14) is used to cover an open side (16) of the displacement member to allow selective access to the interior of the displacement member for coupling a fixture (36) to the first end of the pipe once the concrete has hardened.

Abstract: A molding for the retention of a tie during the concerning of a precast concrete part is provided. In the removal of the molding from the recess of the precast concrete part, the molding is drawn off from the tie, so that the tie head projects into a recess in the precast concrete part. So that it can be pulled out of the precast concrete part easily, the molding has at least one lifting-out part which is preferably in the form of a rope loop and which, on the lifting-out side facing away from the precast concrete part, can be bent into the plane of the lifting-out side or raised outward in order to pull out the molding.

Abstract: A recess plug for positioning lifting anchors in precast concrete panel includes first and second hollow plug halves having complementary, frictionally-engaging mating surfaces, and also having pairs of projecting bosses positioned to overlap, when the plug halves are joined together, such that holes therethrough are in registry to receive nails therethrough for locking the plug halves together in enclosing relation with the head of an anchor as they are mounted on a vertical formwork wall. The plug halves also include boss portions for attaching a reinforcing bar to the plug assembly so that the reinforcing bar is properly positioned relative to the anchor held by the recess plug to bear the stresses applied to the anchor when the panel is lifted by the anchor. Each plug half includes a rear wall having a notch which forms an opening with the notch in the mating plug half sized to receive the shank of an anchor therethrough.

Abstract: Pipe-attachment apparatus (10) for attaching a pipe (22) to a concrete-form wall (16) includes a first attachment device (12,44,56) to be attached to the concrete-form wall and a second-attachment device (14,58) having a radially directed surface for contacting a surface of the pipe and thereby helping to support the pipe. One of the first or second attachment devices includes an axially-extending protrusion (30,70) and the other includes an axially-extending cavity (24,62) for slidably receiving the protrusion. With this arrangement, the second attachment device aids in supporting the pipe from the concrete-form wall during the pouring of concrete, but after the concrete has cured, the first and second attachment devices easily slide away from one another leaving the first attachment device on the concrete form wall and the second attachment device on the pipe.

Abstract: 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 matrix correspond to the outside dimensions of the structure and the outside dimensions of the plug correspond to the inside dimensions of the structure, placing high strength fibers between the plug and the matrix, injecting hardenable material between the matrix and the plug, curing the hardenable material into a hard shell, removing the matrix, deflating the plug, and installing walls, doors or windows. The structures may be joined together on-site in various combinations and configurations to create different types and styles of buildings.

Abstract: A one-piece mandrel for making elastomeric articles by a dipping process has a one-piece body which includes at least one opening extending therethrough. A split extends from the opening through a cross-section of the one-piece body. At least a portion of the body adjacent the split is formed of an elastically resilient material to allow the split to open for removal of the elastomeric article after formation, and to cause the split to self-close after removal of the article from the mandrel. Closure of the split forms a substantially continuous molding surface in the immediately vicinity of the split. Proper alignment of the mating surfaces of the split is assured by irregular (non-planar) design of the split surfaces, or by use of an alignment element embedded in the mandrel. In embodiments where a ferro-magnetic alignment element is used, a separate magnetized element may also be embedded in the mandrel to assist in holding the split closed during the dipping process.

Abstract: A hollow core for a concrete block is cast from an abrasion resistant alloy steel known in the trade as #8620. The core is generally rectangular in cross section and includes a top wall and depending side walls. The side walls are ground to a mirror-finish and the fine tooling grooves formed when the side walls are ground are all parallel to each other and transverse to the top wall of the core. This greatly lessens the frictional resistance between the core and the cement greatly increasing the useful life of the core in comparison the cores previously constructed.

Abstract: The invention comprises a method and apparatus wherein an insert, preferably made of plastic and preferably allowing a melt-on bonding with the tubes and whose floor has a traversing opening for each tube, is inserted into the first part of the injection mold (top mold or bottom mold) as a positioning element for the tubes in such a manner that the insert is at least partially locked or secured into the first part of the injection mold. A tube is then placed in each opening of the insert. A mandrel is then placed in each tube, whereupon the injection mold is locked in such a manner that, if necessary, the mandrels are locked into the second part of the injection mold (bottom mold or top mold). A molten thermoplastic material is then injected, via a sprue provided in the injection mold, into a cavity formed by the injection mold, the insert and the tube ends.

Abstract: A molding device includes a mold core provided with a centering ring which is insertable on an inner centering ring attached to a core jarring machine. To clamp the centering rings one to the other, there is provided a hydraulic clamping device in the form of an elastic ring segment which is an integral part of one of the centering rings and adjoins a pressure chamber communicating with a source of hydraulic liquid. When pressure in the chamber is increased, the ring segment is elastically deformed and clamps the opposite ring.

Abstract: An apparatus for casting an anchor in a concrete unit in which the head of the anchor is gripped by a plurality of resiliently-biased gripper elements pivotally attached to a cylindrical mandrel, the mandrel is drawn within the bore of a void former sleeve having a hemispherical outer end, and the sleeve is withdrawn within the channel of a support sleeve attached to associated formwork such that the hemispherical outer end protrudes from the formwork. After the concrete unit is cast, the void former sleeve is withdrawn from the unit so that the outer end leaves a hemispherical void in the unit and the mandrel is disengaged from the head of the anchor, leaving the head exposed within the void. The support sleeve includes a spring-loaded detent pin which is positioned to engage detent slots in the void former sleeve and a detent recess in the mandrel to hold the sleeve and mandrel in position during casting and to hold the sleeve in position as the anchor is attached to the mandrel.

Abstract: A cylindrical inflatable bag when inflated is used as a form for a concrete structure. A large number of parallel anchor straps extend around a portion of the cylinder in planes perpendicular to the longitudinal axis of the cylinder. Each strap is fixed to the inflatable form and has anchoring means on each end for securing to foundation anchors set in a foundation upon which the structure is to be constructed. The inflated bag is held in position by the straps. Reinforcing elements are supported on the outer surface of the bag. A cementitious material is then applied on an inflated bag to a thickness sufficient to cover the reinforcing elements. After the concrete is set, the bag is deflated removed with the straps for use at another site.

Abstract: An apparatus is provided for use in molding a ferrule which must hold an optical fiber cable so the optical fiber lies precisely concentric with the cylindrical outside surface of the forward portion of the ferrule. A corepin which lies within a mold to form a ferrule cavity between them, has a rearward end held to the mold and a forward end which must be held precisely concentric with the inside surface of the ferrule cavity. A bushing of clover leaf design is positioned in the mold cavity, and has three radially-extending arms that precisely center the forward end of the corepin, while leaving spaces between the arms through which plastic can flow during the molding of the ferrule. The radially-outer arms of the bushing are tied by tying portions whose radially inside surfaces form an interrupted cylindrical outside surface of the ferrule.

Abstract: An arcuate plastic shoe-like sleeve form with an upper open minor end and a lower open major end is provided for attachment by a mounting flange on its major end to a form structure for poured concrete slabs, such as a floor, so that, after concrete is poured and set on the form structure, an arcuate opening is produced in the slab through which a pipe, electrical conduit and the like can be easily threaded as it is moved parallel with the slab and introduced into the opening.

Abstract: Apparatus for forming inverts in a manhole base using a single pour or double pour technique. In the single pour technique, the invert is formed simultaneously with the formation of the manhole base using a mold member having a channel-shaped projection defining the invert. Alignment members simply, and precisely, align the mold member having the channel-shaped projection with the members forming the base member sidewall openings to form a manhole base having an invert in precise alignment with associated sidewall openings. In the two pour technique, the manhole base is initially formed. Thereafter, channel invert forms are aligned with sidewall openings by alignment members arranged within the manhole openings to assure precise alignment therebetween, wherein the invert formed within the manhole base by pouring the casting material into the base member forms an invert which is in precise alignment with associated sidewall openings.

Abstract: A concrete-form conduit holder (10) comprises upright supports (14 and 16) attached to a floor wall (28) of a concrete-form and extending upwardly therefrom. A laterally extending header bar extending between the upright supports forms a substantially horizontal surface on the bottom side thereof to which a plurality of cups are attached with open ends thereof facing downwardly and closed ends thereof facing upwardly against the header bar. To use the concrete-form conduit holder, the upright supports are attached to the floor wall and tubular conduits are extended from outside the form into the form with their ends inserted upwardly into the open ends of said cups where they are held by screws.

Abstract: System for forming concrete tilt up wall panels, wherein a plurality of form pans are assembled on guide bars resting on a flat surface by receiving lugs on the guide bars into openings in flanges of the form pans, the flanges of adjacent form pans being overlapped and being engaged with common guide bar lugs. The form pan assembly is surrounded by metal members forming a boundary for the overall form. Inserts may be placed in the forms for providing connections for lifting, and for propping up the finished wall panel. Several connection appliances are provided by the invention.

Abstract: A molding apparatus for molding in place walls of a structure on a poured concrete floor or other base is provided with a central support member to which are movably attached four flat wall molds and four corner molds which cooperate with adjacent like apparatus and also with conventional exterior molds in forming a cast structure; the apparatus has actuating members for effecting retraction firstly of the flat wall molds and then of the corner molds toward the central support member upon completion of a casting operation and after hardening of the cast materials; the flat wall and corner molds are connected to the central support member by means of a plurality of lost motion connectors in such a manner that the aforementioned retraction is accomplished, after disengagement of locking devices, first by the flat wall molds and then, after a selected delay, by the corner molds; then, while in this position, the apparatus is removed and transported to another location where it will be set in its place in an expa

Abstract: There is disclosed a mold assembly for casting a concrete wall having an opening and for anchoring a flexible resilient ring-like gasket in the peripheral wall of said opening to make a seal with a pipe passing through the opening. The assembly includes a pair of spaced mold walls for receiving unset concrete therebetween, a flexible resilient annular mold arranged to extend between the mold walls with its end surfaces in respective sealing contact with the inner surfaces of the mold walls and a rigid mold-supporting member removably inserted within the annular mold to support the latter while concrete is cast about the annular mold and between the mold walls. The outer surface of the annular mold has a continuous annular groove, intermediate the end surfaces, to receive the pipe-engaging portion of the gasket. Once the concrete is set, the outer anchoring portion of the gasket is embedded in the concrete.

Abstract: A one-piece, unitary, molded resin wall sleeve precursor member has cup-shaped end sections of external diameter D each having a radial flange, with each flange connecting to a hollow transition section that in turn connects to one end of a series of N coaxial sleeve sections of internal diameter D, the sleeve sections being interconnected by N-1 hollow water stop sections having diameters much larger than D. A wall sleeve assembly is derived from this precursor member by cutting off the end sections at their flanges and cutting off the transition sections to leave a wall sleeve, including the water stop and sleeve sections, having a total length L approximately equal to the width W of a concrete wall. The cup-like end sections are inserted into the ends of the wall sleeve, and their flanges afford a convenient means to anchor the resulting assembly to a concrete form.

Abstract: An improved coupling (10) to be embedded in concrete (101) is described. The coupling includes multiple concentric rings (11c) on an outside wall (11a) of a tube (11) which aid in preventing leakage along the outside wall and which help in providing fire retardancy. The coupling includes a step form (14) having a regular diameter which aids in positioning the coupling using a template (105).

Abstract: The invention provides a device for supporting a mold insert in space inside a mold cavity. A pilot and keeper assembly rests on the top of a mold part and extends into a mold cavity and through a small hole in the mold insert. Movement of a handle, which is part of the pilot and keeper assembly of the mold part, is transmitted through a shaft to a retaining means, which engages the opposite extremity of the hole to retain the insert in position during molding operations. After plastic is inserted into the base of the mold cavity and a sufficient curing time has transpired, the handle is rotated back to its initial position, thereby returning the retaining means to a nonretention position, and the pilot and keeper assembly is withdrawn from the mold.

Abstract: A method and apparatus for forming a concrete flush floor having at least one trough formed therein, the method making use of high chair units (14) that support a fiberglass mold (16) having a truncated teardrop-shaped cross section. The fiberglass mold (16) may be supported at an angle to provide a resulting sloping trough. A spacer (17) can be placed in the fiberglass mold (16) during the pouring process to urge the fiberglass mold (16) to assume a first shape. When the concrete has hardened, the spacer (17) can be forced to a second position that allows the fiberglass mold (16) to assume a second position, which second position allows the fiberglass mold (16) to be easily removed from the cast concrete.

Abstract: A reusable window buck or pouring frame for forming a window opening in a cast concrete wall or the like is provided. The window buck comprises an inner and outer rectangular frame in which the inner frame is adapted to be at least partially received in mating relationship within the outer rectangular frame. Releasable clamp means are provided for releasably securing the inner and outer rectangular frame structures together as a substantially interlocked unit.

Abstract: A radially expandable core pin is disclosed for blow-molding a thermoplastic container having a body-portion and a neck-portion, with such neck-portion including a dispensing orifice and internal attachment means. The core pin is radially expandable to compression mold the internal attachment means of the container and comprises a plurality of circumferentially disposed core sections surrounding the central axis of the core pin. These core sections are radially movable between a normally collapsed position and an expanded position, and have outer surfaces which mate along their longitudinal adjacent sides when radially displaced to expanded position to form a substantially continuous neck-forming surface thereabout. The neck-forming surface is relieved in a predetermined pattern to form the internal attachment means of the container.

Abstract: Workpieces of prestressed concrete, specifically railroad ties, are molded in a form having its bottom covered with several transversely separated templates whose outline corresponds to that of respective ties to be produced; the form is longitudinally traversed by reinforcing rods or cables attached to its ends under tension. Each template is provided with several countersunk nuts to be engaged by retaining bolts which pass through upright screw anchors with downwardly opening throats loosely occupied by internally threaded centering sleeves that come to rest on the associated template. With the form compartmented by removable spacers separating the templates, concrete is poured into each compartment and allowed to harden about the screw anchors rising therein; the retaining bolts are then withdrawn along with the spacers to provide the resulting concrete blocks with a certain mobility whereupon the tensioned reinforcing armatures are released to prestress these blocks and are subsequently cut between them.

Abstract: An adapter block having connection openings provided in and extending normal to a surface thereof is produced by a process which includes the steps of foaming a resin compound such as a polyurethane in a mold cavity which has a shape complementary to the adapter block, the resulting component having an integral skin on the exterior surfaces thereof; then allowing the component to harden; then machining the integral skin off the mentioned surface and a surface on the opposite side of the component; and then applying an adhesive to and placing further components against the machined surfaces so that the further components become secured to the first-mentioned component.

Abstract: A taco shell shaper including a shaping portion and a handle member. The shaping portion is affixed to the handle member with a roll pin so that handle member will swing eighty (80.degree.) to either side of the shaping portion. An uncooked tortilla is wrapped around the shaping portion.The user then places the tortilla and shaping portion in heated cooking oil which is approximately three-sixteenth (3/16) of an inch deep in a skillet so that one-half (1/2) the tortilla and one side of the shaping portion are heated in the oil. After that half of the tortilla is cooked, the user then flips the shaper portion with the handle member so that the other half of the tortilla and the other side of the shaper portion are immersed in the heated oil. After that side of the tortilla is cooked, the tortilla and taco shell shaper are removed from the oil and the cooked tortilla is then removed from the shaping portion. The cooked tortilla is now shaped for filling.

Abstract: A gang tool assembly for drilling a precise pattern of holes in a workpiece or otherwise cutting surfaces and the like on such workpiece and including a mounting panel of cured settable material having a pattern of holes formed therein to receive supports for powered tool heads to detachably support the same to form a gang pattern of either drills or cutters for simultaneously drilling a pattern of holes in a workpiece or forming a surface thereon. The mounting panel is formed by mounting a pattern of pins upon a base mold plate, surrounding said plate with mold sidewalls, placing sleeves upon said pins, pouring a settable slurry of high fracture strength of uniform thickness around said pins, allowing the material to cure to rigid condition, and removing the molded rigid panel and sleeves in situ therein from said base mold plate and pins to provide a rigid supporting panel for a gang of powered tool heads having supports extending through said sleeves.

Abstract: A form is provided for use in vessels having a shell and tube configuration with refractory material protecting the tube sheet to provide a flared entrance or exit for the tubes. The form has a shank end, formed as a cylinder for insertion within the tubes, and a flared end which expands at an angle of from about 15.degree. to about 20.degree..

Abstract: A cast iron pipe sleeve is provided at each end with a tight-fitting metal disk. A threaded steel rod is screwed into a nut welded in the center of the inside face of a solid disk. The disk rests against the outer edge of the sleeve and the rod extends through the interior of the sleeve and out through a hole in the center of the opposite disc and further through a hole in one of the form walls. A long bar or channel provided with a center hole is placed over the end of the rod and across two external studs on the form wall. As a nut is tightened onto the end of the rod against the channel, the sleeve is drawn securely and squarely against the form wall. After the other form wall is secured in place tightly against the solid disc end of the sleeve, the concrete is poured and cured, the exterior nut is removed, the form walls are removed, and the discs and rod are removed to be reused. The sleeve remains cast in the concrete as a cylindrical passage through the thickness of the concrete for pipes.

Abstract: Filament reinforced cylindrical plastic screens having open slots defined by their surface wires which are of substantially different widths can be produced on a single helically finned mandrel. The slot widths are varied in accordance with the amount of wire-forming material placed in the generally V-shaped grooves defined by the mandrel fins. The grooves have a double relief angle so that the lower support portions of the surface wires will be formed so as to have a slightly tapered, radially elongated cross-section and the upper portions of the wires will have their sides at a substantially greater relief angle. This relationship permits a relatively small change in the total height of the wires to have a substantial effect on the width of the top portion of the wires, and thus, on the width of the slot openings which can be formed between adjacent wires.

Abstract: A core body assembly for the creation of an oblong arcuate recess in a prefabricated concrete member and for the positioning of an anchor element in the recess, the core body assembly comprising two rigid inner core body parts which are enclosed within a flexible core body jacket, forming a bending connecting bridge and an adjoining anchor retaining groove with centering protrusions in its anchor positioning flanks. The inner core body parts have attachment inserts to which the end of a threaded rod can be attached, and they tilt against each other to clamp the anchor element, when the core body assembly is clamped against the formwork.

Abstract: A quick-release bayonet-type attachment between a core body and a plank of a concrete casting formwork, the core body being of oblong arcuate outline and holding in a central groove the eye portion of an anchor member, the bayonet-type attachment including a bayonet lock plate embedded in the core body and a cooperating threaded rod with a bayonet lock head. The lock plate and the cooperating head have non-circular cross sections, the lock plate being accessible through an upper bore portion of matching cross section, the bore portion below the lock plate having flexible walls and a rotationally offset non-circular cross section.

Abstract: A mold for the base of a dental model includes index means cooperative with a dental model articulator, detachable perimeter members for defining the side walls of the base and an insert for delineating a platform upon which a tooth die is attached. The insert is reversably mountable to accommodate relocation of the platform as a right or left quadrant. A variant includes a flexible rubber mold which defines a quadrant or a full base, each including index means and having a platform for supporting the respective tooth die. Forms for making the flexible molds are also described.

Abstract: A concrete mould employs resilient side shuttering, made of rubber for example, which is prevented from deflecting, when concrete is poured, by tensioning wires extending along the length of the shuttering. Pieces of the shuttering, forming the sides of a casting box, extend between fixed end plates having a series of holes to receive the tensioning wires for adjusting the modular width of panels cast in the box. A series of apertures is provided in each piece of side shuttering so that pneumatic core formers can be inserted through aligned apertures so as to extend across the casting box. Different types of joint formers, either fully or partly resilient, can be located about the core formers, each joint former having a series of grooves to receive reinforcement or tensioning wires or rods. When inflated the pneumatic core former locks the joint formers in place. Opening formers can be made from the shuttering and the joint formers.

Abstract: Mold for making a tooth positioning and retaining appliance with air holes including a cavity having models of the upper and lower teeth arranged so that when an appliance is molded thereby the appliance will have upper and lower archways for receiving upper and lower arches of a person, tooth sockets in the archways arranged in ideal relationship and preselected positions to urge the teeth received thereby into the preselected positions of the sockets. The mold additionally includes air hole or airway forming means extending across the models of the teeth in the mold and being insertable into the mold prior to the molding operation and thereafter removable from the mold with the molded appliance. The air hole forming means is easily separable from the appliance to ultimately define the air holes between the archways and between the labial and lingual sides of the appliance.

Abstract: During positioning of the cylindrical, open ended, outer member relative to a point on a slab form, a cap member may be used to cover the top and support a location determining member. The length of the outer member is adjustable to the thickness of the concrete layer to be poured. A cylindrical inner member, with a closed bottom and an open top, is inserted into the outer member. As the concrete is poured, it is received in the inner member and forms the test core. After the concrete sets, the inner member is removed, resulting in a hole in the concrete. The cap member is alternatively adapted to close the bottom of the outer member, prior to mounting the outer member on the form, to permit the hole to be subsequently filled, if the form has been removed.

Abstract: The present device is especially useful for positioning on forms prior to the pouring of concrete for removal therefrom to create holes in the concrete to receive inserts therein such as in making holes in concrete for steps to be used in a manhole. A tapered steel shaft of any selected length has a collar fixed near one end thereof with an elongated handle passing transversely therethrough. The collar has slanted cam edges on each end providing a cam surface which is approximately 12.degree. from a line perpendicular to the axis. A second collar identical to the first is welded to a form, such as a steel concrete form used in pouring concrete for manholes. The second collar also has slanted cam edges providing a cam surface corresponding to the slanted cam edges on the first collar and there is a hole passing through the steel pin and through the second collar to receive a removable latch pin therein.

Abstract: The invention provides a method and apparatus for injection-molding at least a first part of a plastics manifold element onto an extruded, panel-forming plurality of juxtaposed, hollow elements, comprising the steps of introducing into one set of ends of the hollow elements protrusions which extend from a core defining the shape of at least part of the interior space of the final manifold to be formed; clamping the region of the set of ends accommodating the protrusions between first and second mold members which, together with the core delimit the cavity of at least part of the final manifold; injecting plastic material into the cavity; and removing the core, and the mold members, whereby a strong bond is formed between the hollow elements and the manifold.

Abstract: A method and device for producing a slotted concrete vertical wall. A pair of vertically extending forms having vertically extending ridges are positioned on the final use site of the slotted wall. The ridges of one mold are positioned adjacent and aligned with the ridges of the second mold. A pair of forms are located outwardly and adjacent the molds with a plurality of ties extending through the ridges of the molds being secured to the forms connecting the molds and forms together as concrete is poured between and around the ridges. The forms and molds are removed once the concrete is solidified leaving the slotted concrete wall permanently in the position poured.

Abstract: A mold for embedding a tubular member within a casing wherein the mold compensates for variations in length of the tubular member. The mold is a two-member structure wherein one of the members is provided with a cavity for receiving the tubular member and the casing. The cavity is closed at one end by a movable ring insert which moves relative to the assembled relationship of the tubular member within the casing to compensate for any length variations.

Abstract: This invention provides a single core pin for use with a mold that may be rearranged to provide a plurality of molded configurations. The core pin is characterized by a plurality of arcuate segments 11 arranged to make up a cylindrical core pin 10. On at least one of the arcuate segments 11 there is along the outer surface thereof at least one radial projection 12 extending a predetermined axial distance along the surface.

Abstract: In order to form in a concrete body during casting thereof a part-spherical recess around the head of a pickup bolt having a stem embedded in the body, an apparatus is employed comprising a pair of like elements each having an outer surface complementary to a respective half of the inner surface of the recess. These elements are formed with respective halves of a seat that complementarily surrounds the bolt head and the stem in the recess. A bridge is provided with a pair of pivots that define pivot axes for the respective elements, and a manipulating member is rigidly connected to this bridge.

Abstract: A telescoping, U-shaped straight through, primary flow invert form may be lenghtened or shortened to meet the diameter of the cylindrical manhole and is mounted at opposite ends to the aligned main flow inlet and outlet pipes of the manhole. Longitudinally projecting bottom and opposed side invert tabs located at the ends of the straight through invert form contact the insides of the inlet and outlet pipes, respectively, to center the form. Slide guides, each carrying a retainer tab, adjust the retaining tabs longitudinally to position them within respective pipes at respective ends of the form for preventing lifting of the invert form during concrete pouring within the manhole. An angularly adjustable, intersecting side flow invert form projects from another pipe opening to the manhole at some angle to the straight through form and includes interlocking, axially slidable, opposed section halves.

Abstract: An improved manhole concrete blockout for forming sewer pipe openings in the cast-concrete wall of a manhole where a hole is dug in the ground and at least one vertical hollow form is positioned within the hole and spaced apart from the surface which defines the hole and concrete is poured between the surface defining the hole and the form for forming a manhole wall. A plurality of form sections are connected together so that their outer surfaces can be positioned to become a longitudinal extension of the outer surface of the form. A blockout member is connected to the outer surface of at least one of the sections for forming an opening in the manhole wall, the end adjacent to the section being shaped to engage and conform to the outer surface of the section and the other end being shaped to conform to and engage the corresponding portion of the surface defining the hole so that an opening in the shape of the blockout member will extend through the wall when it is formed.

Abstract: A method and structure in which a Y- or V-shaped trench is dug in the ground for spatially receiving a smaller, complentarily shaped form that is supported in the trench by re-enforcing rods or the like that remain in the set-up concrete when the form is removed. The form has retractible side walls to facilitate removal from the finished trough and further includes removable gutter and drain means that are left as integral parts of the trough when the form is removed.

Abstract: The disclosure teaches a novel foundation clip assembly comprising a foundation clip having a web and two upturned ends integral with said web in combination with a sleeve means covering a central part of the web. Also, a novel method of constructing a foundation stem on a footing is taught which comprises the steps of providing foundation clips and sleeves; inserting the clips in the sleeves; positioning the clips and sleeves on the footing to receive concrete forms; inserting concrete forms in the clips; pouring the concrete in the forms; removing the forms when the concrete sets up; and finally removing said clips from said sleeves for further use.

Abstract: Disclosed is a device for forming apertures in cement or similar hardenable, plastic materials. The device, intended for use where holes of several inches in length are desired, comprises a body portion having affixed therein a threaded nut or coil. The body portion may be, for example, cylindrical in shape and be a solid elastomeric material having an aperture which extends axially through the body portion and communicates with a nut. The nut should be located adjacent the topmost portion of the body portion. A threaded rod may be inserted in the body aperture and screwed into the nut. A U-shaped bracket is provided which is placed on the hardened cement with the legs of the U-shape disposed on either side of body member. The joining member (which completes the U-shape) is spaced above and from the body portion by the legs. The joining member has a slot for receiving the bolt. The device is removed by threading a nut on the bolt down upon the joining member of the bracket.