Blast valve utilizing an aerodynamically configured blade
AssigneeBeth-El Zikhron Yaaqov Industries Ltd.
InventorsSamuel Koeger, Jonathan Schneider
Life of this patent
Estimating the term…
Abstract
A louver type blast valve making use of an aerodynamically configured blade, independently activated by air flow to block a blast shock wave and a subsequent return suction wave. The blast valve (FIG. 6) including a frame and at least one aerodynamically configured blade, independently activated by air flow to block a blast shock and a potentially following return wave. The aerodynamically configured blade having an elongated shape, including at least a steep convex surface and a flat or shallow concave surface, forming a leading edge and a trailing edge at the intersection of the surfaces. The blade being hinged to the frame about a longitudinal axis passing between the steep convex surface and the flat or shallow concave surface.
Claims18
A blast valve comprising a frame and at least one aerodynamically configured blade, independently activated by air flow to block a blast shock and a potentially following return wave, said frame comprises at least a first sealing wall and an opposing second sealing wall said aerodynamically configured blade comprising:
- an elongated shape, including at least a steep convex surface and a flat or shallow concave surface, forming a leading edge and a trailing edge at the intersection of said surfaces, said blade being hinged to said frame about a longitudinal axis passing between said steep convex surface and said flat or shallow concave surface, wherein blocking of said blast shock is performed by aerodynamic forces causing rotation of said at least one blade about said axis towards a first direction up to a closed state and wherein blocking of said return wave is performed by rotation of said at least one blade about said axis towards a second direction up to a closed state.
A blast valve comprising a frame and at least a first aerodynamically configured half-blade and a second aerodynamically configured half-blade, each of said half-blades being hinged to said frame about its own axis, independently activated by air flow to block a blast shock and a potentially following return wave, each of said aerodynamically configured first and second half-blades comprising:
- a semi circular rounded face at a first side, centric with said axis, and at least a steep-convex surface and a flat or shallow-concave surface at a second side, the intersection of said steep-convex and flat or shallow-concave surfaces forming a leading edge on said second half-blade and a trailing edge on said first half-blade, and wherein said semi circular rounded faces of said first half-blade and said second half-blade are facing each other, positioned in close proximity.
Dependencies are inferred from the claim text.