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OwnerTrevor Leonard Tackaberry, Philip Robert Dahlstrom +2inventors
InventorsTrevor Leonard Tackaberry, Philip Robert Dahlstrom, Anthony Cosmo Midea, Colin Powell
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The present invention discloses a feeder element for use in metal casting, said feeder element comprising: (i) a first end for mounting on a mould pattern; (ii) an opposite second end for receiving a feeder sleeve,—and (iii) a bore between—the first and second ends defined by a stepped sidewall; said feeder element being compressible in use whereby to reduce the distance between the first and second ends, wherein the stepped sidewall has a first sidewall region defining the second end of the element and a mounting surface (54) for a feeder sleeve in use, said first sidewall region being inclined to the bore axis by less than 90° and a second sidewall region contiguous with the first sidewall region, said second sidewall region being parallel to or inclined to the bore axis at a different angle to the first sidewall region whereby to define a step in the sidewall. The feeder element offers improvements over the element disclosed in WO2005/051568.
A feeder element for use in metal casting, said feeder element comprising:
The feeder element of any preceding claim, wherein the first sidewall region is inclined to the bore axis at an angle of between 5° and 85°.
The feeder element of any preceding claim, wherein the first sidewall is inclined to the bore axis at an angle of between 30° and 70°.
The feeder element of any preceding claim, wherein the initial crush strength is no more than 5000 N.
The feeder element of any preceding claim, wherein the initial crush strength is at least 250 N.
The feeder element of any preceding claim, wherein said compression in use is non-reversible.
The feeder element of any preceding claim, wherein the stepped sidewall of the feeder element comprises a first series of sidewall regions in the form of rings interconnected and integrally formed with a second series of sidewall regions.
Dependencies are inferred from the claim text.