US 4,280,248 AGranted

Compressed-air pistol of the humane killer type

AssigneeN. Schlumberger & Cie

InventorJean-Frederic Herubel

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Abstract

The pistol is so designed that the valve for controlling the forward stroke of the piston is applied directly against the open rear cylinder end which is surrounded by an annular chamber, the chamber being also open at the rear end and in communication with the inlet for connecting-up with the compressed air supply.

Claims7

Dependent claims

A compressed air pistol, comprising a cylinder having a closing wall at its forward end and open at its rear end,

a piston disposed with said cylinder having a rod extending through a hole formed in the closing wall of said cylinder and movable in a forward stroke and a return stroke,
a reservoir of compressed air,
first valve means at the rear end of said cylinder operative to supply compressed air from said reservoir to said cylinder to effect the forward stroke of said piston,
said first valve means comprising:
a closed housing disposed over said cylinder to define therewith a chamber having an annular portion surrounding said cylinder and a portion extending to the rear of said cylinder,
a closure member movably disposed within the extending chamber portion of said housing in opposition to the rear end of said cylinder,
spring means biasing said closure member against the rear end of said cylinder to normally occlude said cylinder, and
control means comprising trigger means, and a reversing valve independently operable from said trigger means between at least two selected positions, said trigger means and said reversing valve cooperating so that in one position of said reversing valve compressed air is supplied to the extending chamber portion to maintain said closure member fixed in occlusion with said cylinder, and in the other position of said reversing valve said extending chamber is open to atmosphere, to permit said closure member to move against the spring bias to open said cylinder to the annular chamber portion, whereby the compressed air therein actuates said piston, in its forward stroke,
second valve means at the front end of said cylinder operative to supply compressed air from said reservoir to said cylinder to effect the return stroke of said piston, and
switch means operable in response to operation of said control means to supply compressed air from said reservoir to said second valve means to effect the return stroke of said piston and operable on completion of the return stroke of said piston to close off the supply of compressed air thereto.

7 more elements

Dependencies are inferred from the claim text.

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Abstract

A compressed air pistol, comprising a cylinder having a closing wall at its forward end and open at its rear end,

a piston disposed with said cylinder having a rod extending through a hole formed in the closing wall of said cylinder and movable in a forward stroke and a return stroke,
a reservoir of compressed air,
first valve means at the rear end of said cylinder operative to supply compressed air from said reservoir to said cylinder to effect the forward stroke of said piston,
said first valve means comprising:
a closed housing disposed over said cylinder to define therewith a chamber having an annular portion surrounding said cylinder and a portion extending to the rear of said cylinder,
a closure member movably disposed within the extending chamber portion of said housing in opposition to the rear end of said cylinder,
spring means biasing said closure member against the rear end of said cylinder to normally occlude said cylinder, and
control means comprising trigger means, and a reversing valve independently operable from said trigger means between at least two selected positions, said trigger means and said reversing valve cooperating so that in one position of said reversing valve compressed air is supplied to the extending chamber portion to maintain said closure member fixed in occlusion with said cylinder, and in the other position of said reversing valve said extending chamber is open to atmosphere, to permit said closure member to move against the spring bias to open said cylinder to the annular chamber portion, whereby the compressed air therein actuates said piston, in its forward stroke,
second valve means at the front end of said cylinder operative to supply compressed air from said reservoir to said cylinder to effect the return stroke of said piston, and
switch means operable in response to operation of said control means to supply compressed air from said reservoir to said second valve means to effect the return stroke of said piston and operable on completion of the return stroke of said piston to close off the supply of compressed air thereto.

7 more elements