Shock tube

Details Shock tube Shock tube

2009-07-17

2011-12-20

Johnson, Amy Cohen (Department: 2841)

Signals and indicators

Periodic

Detonating

C434S011000, C102S498000

Reexamination Certificate

active

08079322

ABSTRACT:
A shock tube apparatus may include a plenum to hold a volume of gas. The plenum may include a hollow chamber having a first end and a second end located opposite one another along a longitudinal axis, the first end of the chamber defining a shock egress opening. A valve assembly may be positioned at the first end of the chamber to seal the shock egress opening. A piston may be positioned within a recess located at the second end of the chamber. The piston may separate a first volume located between the piston and the first end of the chamber from a smaller second volume located between the piston and the second end of the chamber. A tension supporting rod may connect the valve assembly to the piston. A release valve may be in fluid connection with the second volume and a switch may be operable to open the release valve to release gas from the second volume and trigger opening of the valve assembly to generate a shock wave through the shock egress opening.

REFERENCES:
patent: 3065798 (1962-11-01), Pearson et al.
patent: 3334425 (1967-08-01), Ohlund
patent: 3415442 (1968-12-01), Stoddard et al.
patent: 5505081 (1996-04-01), Lacey et al.
patent: 6439891 (2002-08-01), Tate et al.
patent: 6553912 (2003-04-01), Wygant
patent: 6570820 (2003-05-01), Patel et al.
patent: 7317662 (2008-01-01), Unsworth et al.
patent: 2007/0169658 (2007-07-01), Brock
International Search Report and Written Opinion dated Sep. 3, 2009, directed to counterpart PCT/US2009/050972 application. (9 pages).

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