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:
May. 26, 1992
Filed:
Jan. 29, 1990
Timothy J Doering, Anoka, MN (US);
David R Zappa, Mahtomedi, MN (US);
FMC Corporation, Chicago, IL (US);
Abstract
A primer feed mechanism for automatically feeding unfired primers to, and extracting fired primers from, an artillery piece. A magazine having a rotatable cylindrical drum carrying a plurality of primer cartridges is detachably mounted adjacent the breach block of an artillery piece. A user actuable release handle controls movement of a reciprocable mounted camplate. Movement of the camplate in one direction indexes the rotatable drum to align a fresh primer cartridge with the firing chamber of the artillery piece. Such movement of the camplate also drives a rearwardly positioned bolt toward the breach block of the artillery piece thereby driving the unfired primer cartridge into the firing chamber. Movement of the camplate in the opposite direction causes the bolt to extract the fired primer cartridge from the firing chamber and back into the magazine drum.