Ordnance – Pneumatic – Explosive charge
Reexamination Certificate
2011-06-07
2011-06-07
Johnson, Stephen M (Department: 3641)
Ordnance
Pneumatic
Explosive charge
Reexamination Certificate
active
07954413
ABSTRACT:
An improved two-stage light gas gun for launching projectiles at high speeds. The gun consists of three tubes: the expansion, pump, and launch tubes. The expansion tube contains a close-fitting expansion piston that is propelled by an explosive charge. The expansion piston in turn drives the pump piston housed within the pump tube by means of a rod connecting the two pistons. The action of the pump piston adiabatically compresses and heats a light gas of hydrogen or helium, bursting a diaphragm at a predetermined pressure and expelling the projectile from the launch tube at a very high speed.
REFERENCES:
patent: 1183644 (1916-05-01), Hill
patent: 2872846 (1959-02-01), Crozier
patent: 2882796 (1959-04-01), Clark et al.
patent: 3326084 (1967-06-01), Barbieri et al.
patent: 4038903 (1977-08-01), Wohlford
patent: 4077147 (1978-03-01), Donnard et al.
patent: 4603615 (1986-08-01), Ashley
patent: 4658699 (1987-04-01), Dahm
patent: 4664631 (1987-05-01), Pederson et al.
patent: 4833961 (1989-05-01), Adini
patent: 5194690 (1993-03-01), Guthrie et al.
patent: 5650585 (1997-07-01), Pate et al.
NACA (National Advisory Committee for Aeronautics) technical note 4143, “Development of a Piston-Compressor Type Light-Gas Gun . . . ”, by Charters et al, Nov. 1957.
Aviation Week and Space Technology, “World's Largest Light Gas Gun Nears Completion at Livermore”, Aug. 10, 1992, pp. 57-59, vol. 137, Issue #6.
NASA Contractor Report 4491, “Concept Definition Study for an Extremely Large Aerophysics Range Facility”, by Hallock F. Swift, Feb. 1993.
LandOfFree
Two-stage light gas gun does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Two-stage light gas gun, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Two-stage light gas gun will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2653531