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:
Jul. 19, 1988
Filed:
Jun. 01, 1987
Applicant:
Inventor:
Douglas F McFarland, Davis City, IA (US);
Assignee:
Other;
Primary Examiner:
Int. Cl.
CPC ...
F41F / ; F41D / ;
U.S. Cl.
CPC ...
89-7 ; 89-141 ; 89 11 ;
Abstract
Cylindrically arranged barrels include feeder rods connected to a wobble plate for reciprocally moving shells into a firing position. A back pressure seal sleeve may be positioned on the feeder rods. The sleeves include a forwardly tapering wall thickness whereby combustion pressures press the tapered wall sealingly against the feeder rods. An alternative sealing arrangement includes cut-off pins for each barrel which reciprocate transversely of the barrel in timed relation with the feeder pins. A cam rotates with a power shaft connected to the wobble plate and a nonrotating housing is positioned on the cam and is connected through linkage elements to the cut-off pins.