Fire-fighting system

Claim 1

Fire fighting apparatus comprising, in combination: a tractor including a tractor body and a pair of spaced endless treads movably mounted relative to said tractor body, said tractor having a predetermined center of mass and said tractor body including a front body portion disposed to the front of said center of mass and a rear body portion disposed to the rear of said center of mass; a first tank defining an interior for accommodating water therein, said first tank being attached to said tractor front body portion at a first location between said spaced endless treads and below the elevation of said center of mass; a second tank defining an interior for accommodating water therein, said second tank being attached to said tractor rear body portion at a second location above the elevation of said first location; first conduit means defining a first fluid-flow passageway interconnecting the interiors of said first and second tanks; second conduit means connected to said first tank and defining a second fluid-flow passageway in communication with the interior of said first tank; and pump means operatively associated with said second conduit means for pumping water through said second fluid-flow passageway from said first tank to dispense water from said first tank, said first conduit means delivering water from said second tank interior to said first tank interior through said first fluid-flow passageway under the influence of gravity to replenish water dispensed from said first tank.

Claim 11

A method of dispensing water from fire fighter apparatus including a tractor and a plurality of water tanks mounted on said tractor at different elevations thereon, said method comprising the steps of: pumping water from the interior of the lowermost tank of said plurality of water tanks; conveying said pumped water through a fluid-flow passageway to at least one predetermined location; maintaining fluid-flow communication between the interiors of all of said water tanks; and substantially simultaneously with said pumping and conveying steps, replenishing the water pumped from said lowermost tank by flowing water from a tank disposed at an elevation above said lowermost tank to said lowermost tank.

Claim 12

A method of dispensing water from fire fighter apparatus including a tractor and a plurality of water tanks mounted on said tractor at different elevations thereon, said method comprising the steps of: pumping water from the interior of the lowermost tank of said plurality of water tanks; conveying said pumped water through a fluid-flow passageway to at least one predetermined location; maintaining fluid-flow communication between the interiors of all of said water tanks; and substantially simultaneously with said pumping and conveying steps, replenishing the water pumped from said lowermost tank by flowing water from a tank disposed at an elevation above said lowermost tank to said lowermost tank.