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:
Oct. 12, 1976
Filed:
Feb. 20, 1975
Gerhard Hupp, Oberndorf (Neckar), DT;
Helmut Mader, Schramberg, DT;
Abstract
A firearm, particularly a short firearm for firing caseless ammunition, comprises a housing having a sleeve fixed therein with first and second spring members which are biased against a projection on the gun barrel in order to hold it against axial displacement in each direction. The barrel includes a breech portion with a magazine chamber, and cartridges are moved out of the magazine chamber into a cartridge chamber by a gas piston which is displaceable in a lock member which, together with the gas piston, seals the space in the cartridge chamber behind the cartridge during firing. The lock member includes projections which are engaged behind recesses of the rear breech portion of the barrel. The firing pin gas piston is moved rearwardly during firing, and it has a pin connection to a lock slider so that it and the lock member are rotated to move the projection on the lock member out of alignment with the projections of the breech portion of the barrel so that the lock member and the firing pin may be tracked against the force of a return spring. In a subsequent forward movement of the firing pin and the lock member, the next cartridge in the magazine is positioned in the cartridge chamber with the projectile portion located in the barrel for firing.