US 7,500,509 B2
	Feeder element for metal casting
Colin Powell, Birmingham (United Kingdom); Jan Sallstrom, Gunnarskog (Sweden); and Jan Eric Pehrsson, Ed (Sweden)
Assigned to Foseco International Limited, Tamworth, Staffs (United Kingdom)
Appl. No. 10/521,438 PCT Filed Oct. 21, 2004, PCT No. PCT/GB2004/004451 § 371(c)(1), (2), (4) Date Jan. 14, 2005, PCT Pub. No. WO2005/051568, PCT Pub. Date Jun. 09, 2005.
Claims priority of application No. 0325134.5 (GB), filed on Oct. 28, 2003.
Prior Publication US 2005/0236132 A1, Oct. 27, 2005
Int. Cl. B22C 9/08 (2006.01)

U.S. Cl. 164—359  [164/360]

22 Claims

1. A feeder element for use in metal casting, said feeder element having a first end for mounting on a mould pattern, an opposite second end for receiving a feeder sleeve and a bore between the first and second ends defined by a stepped sidewall which comprises a first series of sidewall regions in the form of rings of increasing diameter interconnected and integrally formed with a second series of sidewall regions, said feeder element being irreversibly compressible in use whereby to reduce the distance between said first and second ends, wherein an initial crush strength in response to a force applied between the first and second ends is no more than 5000 N.