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Class Information
Number: 249/178
Name: Static molds > Core (internal mold) > Including means to expand or contract core
Description: Apparatus having means, other than a mere clamping means, which is actuated to cause the molding surface of the core to expand or contract, to move the same to or from its operative position and facilitate its removal from the molded product.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7361296 |
Motor vehicle wheel frame |
Apr. 22, 2008 |
| 6827322 |
Recoverable improved casing for the manufacture of recesses |
Dec. 7, 2004 |
| 6808154 |
Mold and molding process |
Oct. 26, 2004 |
| 6761555 |
Device for automatically producing an opening or cavity in the side of a ceramic product during molding in a mould |
Jul. 13, 2004 |
| 6279867 |
Multi-part form of a mold for forming a containment member for molten metal |
Aug. 28, 2001 |
| 6254812 |
Method of making a composite part using a compliant forming surface |
Jul. 3, 2001 |
| 6193209 |
Container for forming voids in concrete |
Feb. 27, 2001 |
| 6110407 |
Methods of manufacturing dipped bladder molding mandrels for manufacturing tubular shafts |
Aug. 29, 2000 |
| 6105924 |
Wedge apparatus and mold |
Aug. 22, 2000 |
| 5788874 |
Leak resistant hinge for use in concrete structure fabrication |
Aug. 4, 1998 |
| 5720993 |
Collapsible core for concrete pipe making apparatus |
Feb. 24, 1998 |
| 5714080 |
Self-actuating molds for vertically casting concrete pipe |
Feb. 3, 1998 |
| 5709808 |
Formwork to be used with a wall form assembly for forming a door opening in a concrete wall |
Jan. 20, 1998 |
| 5698065 |
Apparatus for manufacturing glass-fibre-reinforced plastic container |
Dec. 16, 1997 |
| 5679279 |
Collapsible core seam cover for concrete making apparatus |
Oct. 21, 1997 |
| 5667191 |
Method of fabricating article by using non-sand core and article produced thereby, and core structure |
Sep. 16, 1997 |
| 5524861 |
Reusable mold for constructing housing units and method of use thereof |
Jun. 11, 1996 |
| 5456593 |
Molding apparatus for articles having internal undercuts |
Oct. 10, 1995 |
| 5429693 |
Method of making a prestressed composite materials |
Jul. 4, 1995 |
| 5381995 |
Concrete hole former |
Jan. 17, 1995 |
| 5368467 |
Molding apparatus for articles having internal undercuts |
Nov. 29, 1994 |
| 5316611 |
Method of forming reusable seamless mandrels for the fabrication of hollow fiber wound vessels |
May. 31, 1994 |
| 5290006 |
Expanding form for pouring mixed cement to reposition manhole castings |
Mar. 1, 1994 |
| 5266137 |
Rigid segmented mandrel with inflatable support |
Nov. 30, 1993 |
| 5230904 |
Apparatus for fully supporting appliance cabinet interior |
Jul. 27, 1993 |
| 5217731 |
Injection molding tool with retractable bead-forming segments |
Jun. 8, 1993 |
| 5156755 |
Adjustable apparatus for forming voids in concrete |
Oct. 20, 1992 |
| 5139404 |
Apparatus for making lined pipe |
Aug. 18, 1992 |
| 5120213 |
Apparatus for producing pressings provided with channels from powdery molding compound, especially ceramic molding compound |
Jun. 9, 1992 |
| 5108282 |
Biaxial concrete masonry casting apparatus |
Apr. 28, 1992 |
| 5108281 |
Biaxial concrete masonry casting apparatus |
Apr. 28, 1992 |
| 5072911 |
Barrier mold for forming openings in concrete structures |
Dec. 17, 1991 |
| 5039296 |
Apparatus for producing pressings provided with channels from powdery moulding compound, especially ceramic molding compound(short title: honeycomb) |
Aug. 13, 1991 |
| 4996013 |
Method for rapid molding of elongate concrete articles |
Feb. 26, 1991 |
| 4923378 |
Mold assembly for molding automotive seat |
May. 8, 1990 |
| 4919608 |
Molding apparatus with collapsible core |
Apr. 24, 1990 |
| 4909717 |
Biaxial concrete masonry casting apparatus |
Mar. 20, 1990 |
| 4848720 |
Device for producing annular-shaped polymer articles |
Jul. 18, 1989 |
| 4824350 |
Sliding shuttering system |
Apr. 25, 1989 |
| 4698011 |
Manufacture of a hollow envelope by winding filamentary material |
Oct. 6, 1987 |
| 4695421 |
Method of molding a member having undercut portions |
Sep. 22, 1987 |
| 4681724 |
Removable irreversibly shrinking male mandrel |
Jul. 21, 1987 |
| 4676732 |
Molding apparatus |
Jun. 30, 1987 |
| 4623116 |
Apparatus for protecting a pre-formed projecting appendage during plastic molding |
Nov. 18, 1986 |
| 4618122 |
Core segment for concrete forming apparatus |
Oct. 21, 1986 |
| 4614324 |
Mold for producing concrete pipe |
Sep. 30, 1986 |
| 4610422 |
Moulding apparatus for shaping concrete parts |
Sep. 9, 1986 |
| 4541605 |
Metal mold device |
Sep. 17, 1985 |
| 4540536 |
Method of manufacturing transformer windings embedded in casting resin |
Sep. 10, 1985 |
| 4520988 |
Concrete core-wall form and stripping assembly therefor |
Jun. 4, 1985 |
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