Mechanical guns and projectors – Fluid pressure – Applied to intermediate projectile-engaging member
Patent
1975-12-29
1977-04-26
Pinkham, Richard C.
Mechanical guns and projectors
Fluid pressure
Applied to intermediate projectile-engaging member
124 40, 124 31, F41B 1100
Patent
active
040194809
ABSTRACT:
This device is a spear gun for underwater fishing and is operated by a reservoir of compressed air. A reservoir is maintained in an elongate gun barrel within which a slidable piston is located between the pneumatic valve end the other or spear discharge end. A shock absorbing cushion is provided at the discharge end of the gun barrel for stopping the travel of the piston without damage. A gun stock is secured over the gun barrel adjacent the discharge end, and remote from the valve end. The spear rod is provided with a conically reduced portion leading to an abrupt radial shoulder against which shoulder a V-shaped lock is pivoted in the bottom of the spear gun to abutting position to hold the spear in position ready for firing. An L-shaped sear is pivoted to a trigger rod slidably reciprocable through bearings for releasably engaging the V-shaped lock. The end of the trigger rod is provided with a trigger extending into the gun stock to adjacent an eccentric cam having a lever handle, for rotating it between trigger locking or safety position and a trigger release or firing position. The forward end of the spear has a lanyard receiving loop secured therethrough, and the extreme forward end of the spear is threaded for removably receiving the hook or harpoon which may be interchanged depending on the type of fish that is being fished for.
REFERENCES:
patent: 2923285 (1960-02-01), Salles
patent: 2923286 (1960-02-01), Draganti
patent: 3045659 (1962-07-01), Malcolm
patent: 3102525 (1963-09-01), Englis
patent: 3109419 (1963-11-01), Hayward
Browne William R.
Miller Gustave
Pinkham Richard C.
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