Abstract: A ratio controller includes a housing defining a mixing chamber. The housing has a water inlet configured to receive water from a water supply, an agent inlet configured to receive agent from an agent supply, an outlet configured to output an agent-water solution, a first pressure port extending through a sidewall of the housing at a first position proximate the water inlet, and a second pressure port extending through the sidewall of the housing at a second position proximate the mixing chamber.

Abstract: A ratio controller includes a housing defining a mixing chamber. The housing has a water inlet configured to receive water from a water supply, an agent inlet configured to receive agent from an agent supply, an outlet configured to output an agent-water solution, a first pressure port extending through a sidewall of the housing at a first position proximate the water inlet, and a second pressure port extending through the sidewall of the housing at a second position proximate the mixing chamber.

Abstract: A fluid system includes a ratio controller. The ratio controller includes a housing, a nozzle, and a diffuser. The housing defines a mixing chamber, a first inlet positioned at a first end of the mixing chamber, an outlet positioned at an opposing second end of the mixing chamber, and a second inlet positioned at a location around a periphery of the mixing chamber between the first inlet and the outlet. The first fluid is configured to receive a first fluid input. The second inlet is configured to receive a second fluid input. The nozzle includes a nozzle inlet positioned proximate the first inlet and a nozzle outlet positioned within the mixing chamber. The diffuser extends from the outlet and outward from the housing. The diffuser includes a diffuser inlet positioned within the mixing chamber.

Abstract: A fluid system includes a ratio controller. The ratio controller includes a housing, a nozzle, and a diffuser. The housing defines a mixing chamber, a first inlet positioned at a first end of the mixing chamber, an outlet positioned at an opposing second end of the mixing chamber, and a second inlet positioned at a location around a periphery of the mixing chamber between the first inlet and the outlet. The first fluid is configured to receive a first fluid input. The second inlet is configured to receive a second fluid input. The nozzle includes a nozzle inlet positioned proximate the first inlet and a nozzle outlet positioned within the mixing chamber. The diffuser extends from the outlet and outward from the housing. The diffuser includes a diffuser inlet positioned within the mixing chamber.

Abstract: A fire apparatus includes a fluid delivery system having a water circuit, an agent circuit, and a ratio controller. The water circuit includes a water pump configured to pump water from a water source through the water circuit. The agent circuit includes an agent tank configured to store an agent, an agent pump configured to pump the agent through the agent circuit, and an agent metering valve positioned to variably restrict a flow of the agent therethrough. The ratio controller is positioned to receive the water and the agent. The ratio controller is configured to provide an agent-water solution to one or more outlets. The agent metering valve is a self-adjusting metering valve having a valve controller configured to adjust at least one of an orifice size and a valve position based on a water flow rate entering the ratio controller and a preselected agent-to-water ratio for the agent-water solution.

Abstract: A fire apparatus includes a fluid delivery system having a water circuit, an agent circuit, and a ratio controller. The water circuit includes a water pump configured to pump water from a water source through the water circuit. The agent circuit includes an agent tank configured to store an agent, an agent pump configured to pump the agent through the agent circuit, and an agent metering valve positioned to variably restrict a flow of the agent therethrough. The ratio controller is positioned to receive the water and the agent. The ratio controller is configured to provide an agent-water solution to one or more outlets. The agent metering valve is a self-adjusting metering valve having a valve controller configured to adjust at least one of an orifice size and a valve position based on a water flow rate entering the ratio controller and a preselected agent-to-water ratio for the agent-water solution.

Abstract: A firefighting vehicle includes a chassis, a front wheel assembly coupled to the chassis and having at least one front wheel defining an axis of rotation that is substantially perpendicular to the chassis when in a straight position, an operator cab positioned at a front portion of the chassis, and an engine supported by the chassis. The operator cab has a floor section extending laterally between a driver seat and a passenger seat at a position forward of the axis of rotation, and the floor section is substantially flat. The engine is disposed under the operator cab and at least partially rearward of the axis of rotation.

Abstract: A firefighting vehicle includes a chassis, a front wheel assembly coupled to the chassis and having at least one front wheel defining an axis of rotation that is substantially perpendicular to the chassis when in a straight position, an operator cab positioned at a front portion of the chassis, and an engine supported by the chassis. The operator cab has a floor section extending laterally between a driver seat and a passenger seat at a position forward of the axis of rotation, and the floor section is substantially flat. The engine is disposed under the operator cab and at least partially rearward of the axis of rotation.

Abstract: A firefighting vehicle is disclosed that includes a chassis and a front wheel assembly coupled to the chassis. The front wheel assembly has at least one front wheel defining an axis of rotation that is substantially perpendicular to the chassis when in a straight position. The firefighting vehicle also includes an operator cab supported at a front portion of the chassis. The firefighting vehicle further includes an engine supported by the chassis. The engine is disposed under the operator cab and at least partially rearward of the axis of rotation.

Abstract: An improved fire pump for a firefighting vehicle is provided. The fire pump is capable of being positioned at least partially under a rear portion of the cab of a firefighting vehicle. The pump includes a shaft, an impeller supported by the shaft, and a pump housing which encloses the impeller and supports the shaft for rotation about an axis. The housing includes a fluid inlet configured to direct a fluid into the housing along a path generally parallel to the axis. The housing also includes two fluid outlets each at a periphery of the impeller and configured to direct the fluid from the housing along respective paths generally perpendicular to the axis.

Abstract: A firefighting vehicle is disclosed that includes a chassis and a front wheel assembly coupled to the chassis. The front wheel assembly has at least one front wheel defining an axis of rotation that is substantially perpendicular to the chassis when in a straight position. The firefighting vehicle also includes an operator cab supported at a front portion of the chassis. The firefighting vehicle further includes an engine supported by the chassis. The engine is disposed under the operator cab and at least partially rearward of the axis of rotation.

Abstract: An improved firefighting vehicle of a type supporting a pump system (e.g., a fire pump system) is provided. The firefighting vehicle generally includes a chassis and an operator cab. The operator cab is movable (e.g.; tiltable, etc.) relative to the chassis between a transit position and a service position. The firefighting vehicle also includes a fire pump system supported by the chassis at least partially under a rear portion of the operator cab. Positioning the fire pump system in such a location may advantageously allow for a vehicle with improved maneuverability or handling, reduced overall length, reduced overall height, additional capacity for storage, and/or with a fire pump system that is relatively convenient to service.

Abstract: An improved fire pump for a firefighting vehicle is provided. The fire pump is capable of being positioned at least partially under a rear portion of the cab of a firefighting vehicle. The pump includes a shaft, an impeller supported by the shaft, and a pump housing which encloses the impeller and supports the shaft for rotation about an axis. The housing includes a fluid inlet configured to direct a fluid into the housing along a path generally parallel to the axis. The housing also includes two fluid outlets each at a periphery of the impeller and configured to direct the fluid from the housing along respective paths generally perpendicular to the axis.

Abstract: An improved firefighting vehicle of a type supporting a pump system (e.g., a fire pump system) is provided. The firefighting vehicle generally includes a chassis and an operator cab. The operator cab is movable (e.g.; tiltable, etc.) relative to the chassis between a transit position and a service position. The firefighting vehicle also includes a fire pump system supported by the chassis at least partially under a rear portion of the operator cab. Positioning the fire pump system in such a location may advantageously allow for a vehicle with improved maneuverability or handling, reduced overall length, reduced overall height, additional capacity for storage, and/or with a fire pump system that is relatively convenient to service.

Abstract: A vehicle storage system for a vehicle includes an inclined guide configured to be coupled to a vehicle and a storage structure coupled to the guide and configured to move along the guide while maintaining a substantially horizontal orientation.