초록 ▼

A mist generating nozzle has a cylindrical bearing member in which a plurality of distribution slots are formed. A cylindrical sleeve member is concentrically disposed about the bearing member, with an annular chamber defined therebetween. The sleeve member has a plurality of orifices communicating

A mist generating nozzle has a cylindrical bearing member in which a plurality of distribution slots are formed. A cylindrical sleeve member is concentrically disposed about the bearing member, with an annular chamber defined therebetween. The sleeve member has a plurality of orifices communicating with the annular chamber and which extend transversely with respect to the radius of the sleeve member for imparting rotational motion to the sleeve member in response to the discharge of water through the orifices. The centrifugal force acting on the water discharged through the orifices particulates the water droplets into a fine mist or fog, in a substantially spiral pattern around the nozzle. In another aspect of the invention, the mist generating nozzle is incorporated into a firefighting tool, which includes a piercing member for penetrating a building structure.

대표청구항 ▼

A fire fighting tool comprising, in combination: a tubular shaft having first and second end portions and a sidewall enclosing a flow passage, a discharge port formed in one end of said tubular shaft, and an inlet port formed in said sidewall between said first and second shaft end portions for admi

A fire fighting tool comprising, in combination: a tubular shaft having first and second end portions and a sidewall enclosing a flow passage, a discharge port formed in one end of said tubular shaft, and an inlet port formed in said sidewall between said first and second shaft end portions for admitting pressurized water; a water discharge nozzle assembly attached to said shaft in communication with the discharge port of said shaft, said water discharge nozzle having a rotary member for discharging water radially outwardly from said shaft; piercing means connected to said nozzle assembly for penetrating a building structure and simultaneously inserting said nozzle assembly into the building structure; an impact cap mounted on the opposite end of said shaft for transmitting a driving impact force from a sledge hammer or the like for causing said piercing means to penetrate a building structure; and, expansion means carried by said shaft for enlarging an opening in a building structure or the like during foreceable penetration of said piercing means into or withdrawal from a building structure, said expansion means comprising a first annular ring formed on said piercing means at a location forward of said water discharge nozzle assembly, and a second annular ring formed into said tubular shaft at a position aft of said water discharge nozzle assembly.