Pump jet with exhaust diverter
AssigneeRaider Outboards, Inc.
InventorChristopher Woodruff
Life of this patent
Estimating the term…
Abstract
A pump jet apparatus for a motor includes an annular exhaust channel to receive exhaust gas from the motor. At least one hollow exhaust vane extends radially from a vane hub surrounding the annular exhaust channel. The at least one hollow exhaust vane is in flow communication with the annular exhaust channel to discharge the exhaust gas received from the motor through an exhaust discharge outlet. An impeller driven by the motor is mounted rearward of the annular exhaust channel and the at least one hollow exhaust vane and exhaust outlet.
Claims16
A pump jet apparatus for a motor, comprising:
- a rotor housing, including:
- an annular exhaust channel to receive exhaust from the motor;
- a vane hub surrounding the annular exhaust channel;
- and
- at least one hollow exhaust vane extending radially from the vane hub, the at least one hollow exhaust vane in flow communication with the annular exhaust channel, wherein each of the at least one hollow exhaust vane terminates at an exhaust outlet disposed on an outside surface of the rotor housing;
- an impeller disposed rearward of the annular exhaust channel and the at least one hollow exhaust vane;
- and
- a stator housing mounted to the rotor housing rearward of the impeller, wherein the exhaust received from the motor is discharged forward of the impeller through the at least one hollow exhaust vane and exhaust outlet.
A marine outboard motor comprising:
- a powerhead;
- and
- a pump jet apparatus, the pump jet apparatus comprising:
- a rotor hub having an annular exhaust channel for receiving exhaust from the powerhead;
- a rotor housing surrounding a rearward portion of the rotor hub;
- a hollow member in flow communication with the annular exhaust channel and having an exhaust outlet penetrating the rotor housing;
- and
- an impeller positioned within the rotor housing rearward of the annular exhaust channel, wherein the impeller is secured by a threaded plate, and wherein a cone is mounted to the threaded plate and is rotatable with the impeller.
A marine outboard motor comprising:
- a powerhead;
- and
- a pump jet apparatus, the pump jet apparatus comprising:
- a rotor hub having an annular exhaust channel for receiving exhaust from the powerhead;
- a rotor housing surrounding a rearward portion of the rotor hub;
- a hollow member in flow communication with the annular exhaust channel and having an exhaust outlet penetrating the rotor housing;
- and
- an impeller positioned within the rotor housing rearward of the annular exhaust channel, wherein the annular exhaust channel is bounded by an exhaust cap abutting the annular exhaust channel forward of the impeller.
A method of diverting exhaust gas in an outboard motor, comprising:
- receiving, by a hub exhaust channel of a rotor hub, the exhaust gas discharged through a gear case of the outboard motor;
- and
- discharging the exhaust gas forward of an impeller through at least one hollow exhaust vane in flow communication with the hub exhaust channel and a respective exhaust outlet penetrating a housing of the rotor hub,
- whereby the exhaust gas is diverting from passing through an impeller mounted rearward of the hub exhaust channel by an exhaust cap abutting the hub exhaust channel forward of the impeller.
Dependencies are inferred from the claim text.