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:
Aug. 13, 1991
Filed:
Aug. 31, 1990
Applicant:
Inventor:
Albert D Kluge, Lansing, MI (US);
Assignee:
Roberts Sinto Corporation, Lansing, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B22C / ;
U.S. Cl.
CPC ...
164 22 ; 164 21 ; 164200 ; 164201 ;
Abstract
A blow tube arrangement and method for controlling the flow of granular mold material to the cavity of a mold or core making machine, in which one or more transverse openings are formed in the tip of the blow tube, which allow flow into the cavity when the tip is inserted into the cavity but which are covered as the tip is withdrawn. A spring urged covering sleeve receives the tip as it is withdrawn from the mold pattern structure to maintain closure of the tip openings.