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:
Sep. 19, 1989
Filed:
Oct. 24, 1988
Applicant:
Inventors:
Flavio R Da Silva, McPherson, KS (US);
Steven E Spence, McPherson, KS (US);
Robert F Shamet, McPherson, KS (US);
Assignee:
American Maplan Corporation, McPherson, KS (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29C / ; B29C / ;
U.S. Cl.
CPC ...
4253261 ; 251357 ; 2642094 ; 425 71 ; 425 721 ; 425151 ; 4253871 ;
Abstract
A safety plug for an extrusion apparatus for extruding pipe is provided with a valve opening when its tether to the extrusion die breaks. The valve can be formed by a disk on a rod which is axially displaceable in a tubular body having a flange forming a valve seat for the disk of the rod. The rod is connected to the chain.