Firearms – Underwater type
Patent
1997-05-19
1998-05-05
Johnson, Stephen M.
Firearms
Underwater type
89 144, F41A 2130
Patent
active
057460183
ABSTRACT:
A device for use as a muzzle brake for an underwater gun having a project conveying structure with concentric inner and outer cylinders. The inner cylinder has at least one longitudinal slot formed therein. A sealing means joins the projectile conveying structure to the underwater gun at the structure's first end. A second end of the structure is provided with a seal for closing the second end after a projectile is fired through it. A piston having an aperture therethrough is positioned inside the inner cylinder and is axially moveable therein adjacent the longitudinal slot. An actuator is positioned between the inner cylinder and the outer cylinder. Actuator links through the longitudinal slot connect the piston with the actuator. After a projectile is fired through the projectile conveying structure to displace the piston from its initial position, the actuator means returns the piston to that initial position to ready the device for reuse.
REFERENCES:
patent: 1525846 (1925-02-01), Wurtzebach
patent: 3300888 (1967-01-01), Belcher et al.
patent: 3677132 (1972-07-01), Plenge
patent: 4939977 (1990-07-01), Stroup
patent: 5648631 (1997-07-01), Kirschner et al.
patent: 5687501 (1997-11-01), Stace et al.
Berlam Gary R.
Kirschner Ivan N.
Johnson Stephen M.
Kasischke James M.
Lall Prithvi C.
McGowan Michael J.
The United States of America as represented by the Secretary of
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