Patent ID: 6789934
Filing Date: 2004-09-14
Classification: B01F,B29C,B29K,Y10S

Abstract:
A chamber for making castings comprising:a base having a top layer made of a rigid material for the purpose of supporting castings and formed with an upper surface and a lower surface, a bottom layer made of a pliable, rubbery material and formed with an upper surface and a lower surface, and connected on said upper surface of said bottom layer to said lower surface of said top layer; a cover formed of a lightweight, rigid material and having a closed top and an open bottom and shaped to conform to the dimensions of said base wherein an airtight seal is produced when said cover is placed over said base; a hose connector attached to said top of said cover; a flexible tube having two ends and attached on one end to said hose connector; and a suction pump for evacuating air from said chamber and connected to said opposite end of said flexible tube.