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:
Feb. 16, 1988
Filed:
Jan. 29, 1986
Applicant:
Inventor:
Eugen Buhler, 8877 Burtenbach, DE;
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B22C / ;
U.S. Cl.
CPC ...
164-71 ; 164 12 ; 164 29 ; 164 37 ; 164 38 ; 1641601 ; 164169 ; 164195 ;
Abstract
A method and apparatus for producing flaskless foundry molds made up of copes and drags of wet casting foundry sand, which is blasted into a cavity to form the mold with the use of vacuum. The sand is pressed mechanically while aspirating air therefrom. The gap coming into existence between the pressing plate and the back side of a mold during pneumatic impact compaction is filled with sand before pressing so that a flat back side is produced on the mold so that when casting takes place later there is not danger of the bottom of the mold fracturing or of deformation taking place.