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:
Jul. 09, 1991
Filed:
Dec. 19, 1990
Karl D Voss, Standish, MI (US);
General Motors Corporation, Detroit, MI (US);
Abstract
Differential pressure, countergravity casting apparatus includes a vertically-parted mold stack comprising a plurality of side-by-side mold members disposed on an underlying mold drag. First and second cam shafts are rotatably disposed inside a vacuum box confronting the mold stack and are rotated to engage respective first and second end mold members of the mold stack to clamp the mold stack sealingly together sans glue. Upper ends of the cam shafts extend above the ceiling of the vacuum box and are operatively connected to an actuator linkage for effecting cam shaft rotation in a manner to clamp the mold stack together or in a manner to release the mold stack after casting.