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:
Apr. 15, 1986
Filed:
Jul. 28, 1983
Applicant:
Inventor:
Nils G Bergstrom, S-302 56 Halmstad, SE;
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B22C / ;
U.S. Cl.
CPC ...
164206 ;
Abstract
A device for vibration and realization of compaction pressure suitable for manufacture of sand casting molds in a flask which comprises two plates of which one plate carries a cylinder wall and forms a cylinder top and the other plate forms a piston, the space between these plates being substantially of the same diameter of the plate which forms the piston and being connected to a steplessly variable pressure medium source so that the compaction pressure and vibration amplitude are steplessly adjustable.