The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 23, 1989
Filed:
Jan. 13, 1988
Raymond M Nagan, River Vale, NJ (US);
Antulio D Marrero, Amawalk, NY (US);
Rajeev V Naik, Garfield, NJ (US);
Victoria Gleyzer, New Milford, NJ (US);
The Interlake Corporation, Oak Brook, IL (US);
Abstract
Method and apparatus for producing an investment casting from molten material by filling a cavity in a mold with the molten material utilizing at least one porous member in the inlet conduit system of the mold, the porous member enabling evacuation of the mold cavity, through the inlet conduit system and the porous member, and having a structure including pores small enough subsequently to support the molten material upon the porous member by surface tension, with the molten material closing off essentially all atmospheric communication between the inside and the outside of the mold cavity, to thereby prevent passage of the molten material into the mold cavity until the method and apparatus subsequently raises the pressure outside the mold to provide a higher pressure outside the mold cavity and create a differential pressure between the inside and the outside of the mold cavity sufficient to overcome the surface tension and urge the molten material to pass through the pores of the porous member and fill the mold cavity for subsequent cooling and solidification to complete the casting.