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:
Dec. 20, 1988
Filed:
May. 07, 1987
Applicant:
Inventor:
George D Chandley, Amherst, NH (US);
Assignee:
Metal Casting Technology, Inc., Milford, NH (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B22D / ;
U.S. Cl.
CPC ...
164 63 ; 164 661 ; 164119 ; 164255 ; 164259 ; 164306 ;
Abstract
An apparatus and method for counter-gravity casting of molten metal, in a gas permeable mold with a fill passage upper end above the lateral communication of the passage with other mold cavities. The mold is filled by low pressure in a chamber sealed about the mold while the mold fill passage is communicated with the molten metal. Provision is made for maintaining, during filling, the upper part of the mold fill passage at a lower pressure than that in the chamber external to the mold.