B - Operations – Transporting – 22 – C
Patent
B - Operations, Transporting
22
C
22/144
B22C 7/02 (2006.01) B22C 9/04 (2006.01) F02B 75/22 (2006.01) F02F 1/22 (2006.01) F02B 61/04 (2006.01) F02B 75/02 (2006.01)
Patent
CA 1334617
Disclosed herein is a lost foam pattern for an engine block including a cylinder and an axially extending transfer passage defined by spaced side walls and an inner wall which is outwardly convex, the pattern comprising a first pattern piece including a wall defining a portion of a cylindrical bore having an axis, and a passage recess extending in the direction of the axis of the cylindrical bore and communicating with the cylindrical bore, which passage recess is defined by opposed walls extending axially with respect to the cylindrical bore and forming the spaced side walls of the transfer passage, a second pattern piece located in the passage recess, having a first arcuate wall forming a continuation of the cylindrical bore portion in the first pattern piece, having a second arcuate wall forming the inner wall of the transfer passage and being outwardly convex, and additional recesses and portions on the first and second pattern pieces for locating the pattern pieces relative to each other and for preventing relative movement therebetween except in the direction opposite the direction of assembly of the the pattern pieces.
601445
Outboard Marine Corporation
Smart & Biggar
LandOfFree
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