Apparatus for driving a surfboard

Details Apparatus for driving a surfboard Apparatus for driving a surfboard

1981-06-15

1984-07-03

Blix, Trygve M.

Marine propulsion

Jet drive

440112, 440 89, B63H 104

Patent

active

044577249

ABSTRACT:
Apparatus for driving a surfboard comprising an internal combustion engine mounted on a box on rear portion of the surfboard and a water jet propelling device driven by the internal combustion engine for propelling the surfboard. The exhaust gas system and the water jet propelling device are provided in the box. A part of the jet water is used as a cooling water of the engine. The box comprises three superimposed cases having partitions, dividing the box into an exhaust gas passageway constituting a plurality of expansion chambers and passages for exhaust gases with the exhaust gas passageway defining a gas exhaust path arranged in three dimensions, thereby preventing entry of water from the outlet port through the exhaust gas passageway to the exhaust port of the engine.

REFERENCES:
patent: 3545897 (1970-12-01), Russell
patent: 4019456 (1977-04-01), Harbert
patent: 4174672 (1979-11-01), Cox
patent: 4274357 (1981-06-01), Dawson

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