US 4,393,748 AGranted

Device for stripper

AssigneeAktiebolaget Bofors

InventorsSten Hallqvist, Erik Eriksson

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Abstract

A stripper (5) is arranged at a breech ring of a large-calibre firearm. A ramming unit is arranged to insert a shell (11) and a charge (10) into the bore and chamber of the firearm during an insertion process. During the extraction process of the ramming unit which follows the insertion process the stripper goes into coaction with the bag charge and retains this in the chamber position. The stripper coacts with blocking means which during at least part of the insertion process prevent the stripper from being turned out. At a predetermined insertion position the ramming unit (12) achieves a releasing of the blocking means and at the releasing of the latter the stripper is released and can assume a turned-out position. The stripper is actuated to the turned-in position by means of a closing mechanism, and during this actuation the blocking means are prepared to again retain the stripper in the turned-in position at a renewed ramming.

Claims7

Dependent claims

In a firearm having a chamber for receiving a shell and powder charge, a ramming unit for inserting said shell and powder charge in said chamber, a threaded breech ring and closing screw for maintaining said chamber closed, the improvement comprising:

an elongated stripper for holding the powder charge in the chamber during extraction of said ramming unit, said stripper being connected at one end to swing from a first charge holding position to a second position for maintaining said stripper from striking said powder charge;
a blocking means for maintaining said stripper in said second position until said ramming unit moves said shell and powder charge into said chamber including a longitudinal blocking rod having at one end thereof an actuator for longitudinally displacing said rod in response to movement of said ramming unit, and a displacement means connecting said stripper with a remaining end of said blocking rod, whereby motion of said rod releases said stripper from said second position to assume said first position under the influence of a spring force against said stripper;
and,
means for moving said stripper from said first position to said second position in response to closing said screw with said breech ring whereby said stripper is maintained in place avoiding contact with a subsequent shell and powder charge.

1 more element

A firearm which discharges a powder charge in combination with a shell, said firearm having a chamber for receiving said shell and powder charge, further comprising:

a stripper having a first position for maintaining during extraction of a ramming unit from said chamber said powder charge in place, said stripper being movable to a second position for permitting insertion of said shell and powder charge during loading of a firearm which prevents said stripper from discharging said powder charge;
a longitudinal blocking rod having at one end thereof an actuator for longitudinally displacing said rod in response to movement of said ramming unit;
displacement means connecting said stripper with a remaining end of said blocking rod, whereby motion of said ramming unit displaces said blocking rod, and said displacement means maintains said stripper in said second position whereby said powder charge and shell may be inserted;
means for releasing said blocking means when said ramming unit moves said powder charge and shell into said chamber whereby said stripper under the action of a spring force moves to said first position for retaining said charge during extraction of said ramming unit;
and
means for closing said firearm chamber against said shell and powder charge, said means for closing coupled to said stripper for returning said stripper to said second position whereby a subsequent powder charge and shell may be inserted in said chamber.

3 more elements

Dependencies are inferred from the claim text.