Patent ID: 7150307

Claim:
An insert for forming a sprue comprising: an elongate hollow stem member having a first end and a second end, the first end of said stem member adapted to abut a lost foam casting pattern, at least a portion of said stem member is formed by a porous material to facilitate passage of a fluid therethrough; means for expelling a fluid disposed in said stem member, said means for expelling a fluid adapted to be connected to a source of resin, wherein the resin is expelled by said means for expelling a fluid and passes through the porous material of said stem member; and an inlet member formed by a porous material and disposed on the second end of said stem member, said inlet member having a cover disposed thereon, wherein the cover includes a first aperture and a second aperture formed therein, the first aperture is adapted to receive said means for expelling a fluid, and said second aperture includes an inlet disposed therein.