Fire hose lance
AssigneePok S.A.
InventorLouis Lanteri
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Abstract
The present invention relates to a fire hose lance comprising a body (1) including a pressure control device comprising a valve (44) partly closing up an axial drill hole (320) of a piston (32) mounted in the body (1) of the lance, characterized in that valve (44) is fixedly mounted on the body (1), piston (32) is slidably mounted in the body (1), wherein movement of the piston (32) is caused, on the one hand, by the force resulting from the fluid's total pressure exerted on the surface (D1) of the piston located opposite valve (44) and on the other hand, by the force exerted by restoring means (31) tending to neutralize the resulting force from the fluid pressure.
Claims7
A fire hose lance comprising:
- a body including a pressure control device;
- said pressure control device including a valve fixedly mounted on the body and a piston slidably mounted on the body, said piston having an axial drill hole in part defining a passage for flowing fluid through the body and which passage part is in part closed by said valve, said piston lying concentrically about said axial hole and in part surrounding said valve;
- said piston being slidably movable along said body relative to said valve fixed to said body in response to a resulting force from pressure of the fluid flowing through said passage part applied to a surface of the piston located opposite said fixed valve and a biasing force exerted by a restoring means tending to neutralize the resulting force from the fluid pressure applied to the piston.
Dependencies are inferred from the claim text.