Crank-operated airgun with cable and cam system

Patent metadata

Field	Value
Publication number	US-12546559-B2
Application number	US-202418971743-A
Country	US
Kind code	B2
Filing date	Dec 6, 2024
Priority date	Dec 7, 2023
Publication date	Feb 10, 2026
Grant date	Feb 10, 2026

Abstract

An airgun pressure system as described herein includes a pressure chamber comprising a cylinder extending along a length of an axis of the airgun parallel with an axis of a barrel of the airgun. The airgun also includes a piston disposed within the pressure chamber and translatable along a length of the cylinder to pressurize gas in the pressure chamber in response to an increase in force applied to the piston. The airgun also includes a rotating drum connected to a frame of the airgun, a cable operably connected to the piston and the rotating drum, and a crank handle operably connected to the rotating drum and configured to cause rotation of the rotating drum to increase tension on the cable and force on the piston to compress the gas in the pressure chamber.

First claim

What is claimed is:

1 . An airgun comprising:
a pressure chamber comprising a cylinder extending along a length of an axis of the airgun parallel with an axis of a barrel of the airgun; a piston disposed within the pressure chamber and translatable along a length of the cylinder to pressurize gas in the pressure chamber in response to an increase in force applied to the piston; a rotating drum connected to a frame of the airgun; a cable operably connected to the piston and the rotating drum; and a crank handle operably connected to the rotating drum and configured to cause rotation of the rotating drum to increase tension on the cable and force on the piston to compress the gas in the pressure chamber.

2 . The airgun of claim 1 , further comprising:
a rod connected to the piston and extending along a portion of the length of the cylinder, wherein the cable is connected at a first end to the rotating drum and engages with the rod to apply force to the piston.

3 . The airgun of claim 1 , wherein the rotating drum comprises:
a first surface at a first diameter configured to receive the cable as the rotating drum rotates; a second surface at a second diameter smaller than the first diameter; and a spiral surface extending between the first surface and the second surface, wherein the cable is configured to wrap against the first surface, the spiral surface, and the second surface as the rotating drum is rotated.

4 . The airgun of claim 1 , wherein:
the crank handle is connected to a crank gear having a first diameter; and the rotating drum is connected to a gear having a second diameter, the second diameter greater than the first diameter, the rotating drum configured to rate in response to rotation of the crank handle through the crank gear.

5 . The airgun of claim 4 , wherein the crank handle comprises a first rotational connection connecting the crank handle and the crank gear and a second rotation connection configured to enable the crank handle to pivot for storing against a frame of the airgun.

6 . The airgun of claim 1 , further comprising a bearing surface connected to a rod extending from the piston, wherein the pressure chamber comprises a first portion configured to engage with the piston and a second portion, the second portion enclosing the rod and defining:
a cylindrical passage concentric with the cylinder; and a slot in a wall of the second portion for coupling the bearing surface to the rod.

7 . The airgun of claim 1 , further comprising a ratchet assembly configured to engage with an exterior perimeter of the rotating drum to prevent rotation of the rotating drum in a first direction when engaged.

8 . A pressure system for an airgun comprising:
a cylinder comprising a pressure chamber and an extended cylinder; a piston disposed within the cylinder and configured to compress a gas within the pressure chamber; a guide element extending through a wall of the extended cylinder and configured to maintain stability of the piston within the cylinder; a linkage connecting the guide element to the piston; a rotating drum connected to a frame of the airgun; a cable operably connected to the piston and the rotating drum; and a crank handle operably connected to the rotating drum and configured to cause rotation of the rotating drum to increase tension on the cable and force on the piston to compress the gas in the pressure chamber.

9 . The pressure system of claim 8 , wherein the rotating drum comprises:
a first surface at a first diameter configured to receive the cable as the rotating drum rotates; a second surface at a second diameter smaller than the first diameter; and a spiral surface extending between the first surface and the second surface, wherein the cable is configured to wrap against the first surface, the spiral surface, and the second surface as the rotating drum is rotated.

10 . The pressure system of claim 8 , wherein:
the crank handle is connected to a crank gear having a first diameter; and the rotating drum is connected to a gear having a second diameter, the second diameter greater than the first diameter, the rotating drum configured to rate in response to rotation of the crank handle through the crank gear.

11 . The pressure system of claim 8 , wherein the pressure chamber comprises a first pressure chamber and a second pressure chamber and the piston comprises a first piston and a second piston, wherein rotation of the crank handle is configured to apply a force to the first piston and the second piston.

12 . The pressure system of claim 11 , wherein the first pressure chamber and the second pressure chamber are arranged in parallel along a length of the airgun.

13 . The pressure system of claim 11 , wherein the first pressure chamber is disposed coaxially with the second pressure chamber adjacent an end of the second pressure chamber, and wherein the first piston and the second piston are operably connected by a rod extending from the first piston into the second pressure chamber such that movement of the first piston causes movement of the second piston.

14 . The pressure system of claim 13 , wherein the first pressure chamber has a first diameter and the second pressure chamber has a second diameter, the second diameter less than the first diameter.

15 . An airgun comprising:
a frame including a user interface surface and a trigger configured to cause release of pressurized gas for firing a projectile; and a pressure system including:
a cylinder comprising a pressure chamber and an extended cylinder;
a piston disposed within the cylinder and configured to compress a gas within the pressure chamber;
a guide element extending through a wall of the extended cylinder and configured to maintain stability of the piston within the cylinder;
a linkage connecting the guide element to the piston;
a rotating drum connected to a frame of the airgun;
a cable operably connected to the piston and the rotating drum; and
a crank handle operably connected to the rotating drum and configured to cause rotation of the rotating drum to increase tension on the cable and force on the piston to compress the gas in the pressure chamber.

16 . The airgun of claim 15 , wherein the rotating drum comprises:
a first surface at a first diameter configured to receive the cable as the rotating drum rotates; a second surface at a second diameter smaller than the first diameter; and a spiral surface extending between the first surface and the second surface, wherein the cable is configured to wrap against the first surface, the spiral surface, and the second surface as the rotating drum is rotated.

17 . The airgun of claim 15 , wherein the pressure chamber comprises a first pressure chamber and a second pressure chamber and the piston comprises a first piston and a second piston, wherein rotation of the crank handle is configured to apply a force to the first piston and the second piston.

18 . The airgun of claim 17 , wherein the first pressure chamber and the second pressure chamber are arranged in parallel along a length of the airgun.

19 . The airgun of claim 17 , wherein the first pressure chamber is disposed coaxially with the second pressure chamber adjacent an end of the second pressure chamber, and wherein the first piston and the second piston are operably connected by a rod extending from the first piston into the second pressure chamber such that movement of the first piston causes movement of the second piston.

20 . The

Assignees

• Crosman Corp

Inventors

• Trpkovski Paul

Classifications

• F41B11/681 Primary

  Pumping or compressor arrangements therefor · CPC title