Patent ID: 8839876

Claim:
A firefighting apparatus comprising: a controller; a hydraulic pump operable to supply a hydraulic fluid under pressure; a water pumping subsystem comprising: a first hydraulic motor powered by the hydraulic fluid under pressure; a water pump driven by the first hydraulic motor operable to supply water under pressure to a conduit; a water flow sensor configured to determine a flow rate of water in the conduit and provide the flow rate to the controller; and a first control valve under the control of the controller to regulate the hydraulic fluid input to the first hydraulic motor and the water flow rate; a chemical foam subsystem comprising: a second hydraulic motor powered by the hydraulic fluid under pressure; a foam pump driven by the second hydraulic motor operable to inject foam into the conduit; a foam flow sensor configured to determine a flow rate of foam from the foam pump and provide the flow rate to the controller; and a second control valve under the control of the controller to regulate the hydraulic fluid input to the second hydraulic motor and the foam flow rate; an electrical power generator subsystem comprising: a third hydraulic motor powered by the hydraulic fluid under pressure; a generator driven by the third hydraulic motor operable to generate electrical power; a third control valve under the control of the controller to regulate the hydraulic fluid input to the third hydraulic motor; and the controller monitoring the electrical power output from the generator to control the third control valve; an air compressor subsystem comprising: a fourth hydraulic motor powered by the hydraulic fluid under pressure; an air compressor driven by the fourth hydraulic motor operable to supply compressed air to an air line coupled to the conduit; an air pressure sensor configured to determine a pressure of air in the air line and provide the air pressure to the controller; and a fourth control valve under the control of the controller to regulate the hydraulic fluid input to the fourth hydraulic motor and the air pressure in the air line; a hydraulic fluid cooling device receiving and cooling hydraulic fluid returned from the first, second, third, and fourth hydraulic motors; and a hydraulic reservoir storing the cooled hydraulic fluid.