Device for building up high-pressure impulse jets of liquid

Claim 1

A device for building up high-pressure impulse jets of liquid, comprising a tank containing compressed gas; a cylinder defining an interior space; a piston disposed in said cylinder and dividing said space into two chambers, of which the first chamber is in communication with said tank containing compressed gas and the second chamber is filled with liquid and has an aperture for the outlet of pressurized liquid after an impact has been delivered thereupon by said piston in response to acceleration thereof by compressed gas in the first chamber; a pressure main supplying pressurized liquid into the space of said cylinder to convey the piston so as to decrease the vOlume of the first chamber after an impact; said cylinder having apertures in a sidewall thereof for draining liquid from the cylinder space during piston displacement in the direction of the second chamber; a locking mechanism with a movable member for overlapping said drain apertures, said mechanism being actuated at the end of the piston reverse stroke after an impact; means adapted for the initial opening of said drain apertures through the movable member when said piston is in the extreme rear position in said first chamber; means providing for the full opening of said drain apertures through the movable member in response to the flow of liquid forced out of the cylinder space during piston travel towards said second chamber; and means for moving said movable member so as to close said drain apertures upon the piston delivering an impact upon the liquid.

Claim 2

A device for building up high-pressure impulse jets of liquid, comprising a tank containing compressed gas; a cylinder defining an interior space; a piston disposed in said cylinder and dividing said space into two chambers, of which the first chamber is in communication with said tank containing compressed gas and the second chamber is filled with liquid and has an aperture for the outlet of pressurized liquid after an impact has been delivered thereupon by said piston in response to acceleration thereof by compressed gas in the first chamber; a pressure main supplying pressurized liquid into the space of said cylinder to convey the piston so as to decrease the vOlume of the first chamber after an impact; said cylinder having apertures in a sidewall thereof for draining liquid from the cylinder space during piston displacement in the direction of the second chamber; a locking mechanism with a movable member for overlapping said drain apertures, said mechanism being actuated at the end of the piston reverse stroke after an impact; means adapted for the initial opening of said drain apertures through the movable member when said piston is in the extreme rear position in said first chamber; means providing for the full opening of said drain apertures through the movable member in response to the flow of liquid forced out of the cylinder space during piston travel towards said second chamber; and means for moving said movable member so as to close said drain apertures upon the piston delivering an impact upon the liquid.

Claim 4

A device as claimed in claims 2, wherein the means adapted for the initial opening of the drain apertures by the movable member is formed by an auxiliary space in the body of the locking mechanism, communicated with the pressure main and adapted to receive the butt end portion of said movable member, said auxiliary space being in constant communication with said main space in the body of the locking mechanism.