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 Title: |
US4274357:
Power operated surfboard
[ Derwent Title ]
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| Country: |
US United States of America
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| Inventor: |
Dawson, Edward S.; St. Paul, MN
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| Assignee: |
Surf-Jet Corporation, St. Paul, MN
other patents from SURF JET MANUFACTURING, INC. (553535) (approx. 4)
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| Published / Filed: |
1981-06-23
/ 1979-11-26
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| Application Number: |
US1979000097412
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| IPC Code: |
Advanced:
B63B 35/79;
B63H 11/00;
B63H 11/08;
F02B 61/04;
Core:
B63B 35/73;
F02B 61/00;
more...
IPC-7:
B63B 35/72;
B63H 11/02;
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| ECLA Code: |
B63B35/79M; B63H11/08; F02B61/04B;
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| U.S. Class: |
Current:
114/055.51;
114/055.56;
440/088.A;
440/088.J;
440/088.M;
440/088.N;
440/089.C;
440/089.J;
440/089.R;
Original:
114/270;
440/089;
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| Field of Search: |
114/270
440/038,39,41,46,87-89
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| Priority Number: |
| 1979-11-26 |
US1979000097412 |
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| Abstract: |
A power operated surfboard which has a raised rear hollow portion at the rear in which is disposed an impeller housing having an impeller therein and a water discharge passage extending rearwardly from the housing. An internal combustion engine is supported above the impeller housing and has a short vertical axis connected to the impeller which rotates about a vertical axis. Surrounding the impeller housing is an exhaust gas housing which communicates with the exhaust gas passage of the engine and with a discharge chamber beneath the floor of the surfboard. The exhaust gas housing is gas tight and provides a gas cushion which retards the entrance of water through the discharge chamber into the exhaust passage of the engine, when the surfboard is not being operated. This is aided by a flexible valve disposed at the discharge outlet of the discharge chamber to retard the entrance of water into the discharge chamber. Associated with the exhaust gas discharge chamber and forming a part of a two chamber is a water inlet chamber which communicates with the intake of the impeller through the floor of the boat and extends over the opening to the impeller to prevent accidental contact with the rotating impeller either by an occupant or by some foreign object. A belly pan has a bottom wall disposed between the engine and the impeller housing and surrounds the engine to form an engine compartment. Disposed at the bottom of the engine compartment is a one way valve which permits draining of water or fuel from the belly pan but hinders the access of water into the interior of the belly pan.
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| Attorney, Agent or Firm: |
Kinney, Lange, Braddock, Westman & Fairbairn ;
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| Primary / Asst. Examiners: |
Cherry, Johnny D.;
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| INPADOC Legal Status: |
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Family Legal Status Report
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| Family: |
Show 22 known family members
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First Claim:
Show all 12 claims |
What is claimed is:
1. A power operated surfboard with a body having a lower surface designed to move readily through the water and an upper surface which is relatively flat over the forward portion thereof to enable a rider to stand on the surfboard, the body having a floor and a raised rear hollow portion above said floor and containing an engine compartment therein,
- an impeller housing rigidly secured to and resting within the raised rear hollow portion of said body below said engine compartment, with a water intake passage extending through the floor of the body and a water exhaust passage extending rearwardly from the rear hollow portion,
- an impeller in said housing mounted for rotation about a vertical axis,
- an internal combustion engine disposed in said engine compartment above said impeller housing, means securing said internal combustion engine and said impeller housing in rigid relationship to each other, said engine having a vertical output shaft connected to the drive shaft of the impeller for driving the same about its vertical axis, said internal combustion engine further having a cooling jacket and an exhaust passage,
- an exhaust gas housing surrounding said impeller housing and having the walls thereof substantially spaced from the impeller housing to form a substantial gas chamber around said impeller housing, said exhaust gas housing being secured to said impeller housing in a substantially gastight manner, said gas chamber having an inlet opening communicating in a substantially gastight relation with the exhaust passage of the engine and having an outlet opening,
- and discharge means disposed adjacent the floor of the surfboard and connected to the outlet opening of the exhaust gas housing for discharging the exhaust gas rearwardly beneath the floor of the surfboard,
- said exhaust gas chamber acting to provide a gas cushion therein to retard the entrance of water through said discharge means into the exhaust passage of the engine when the surfboard is not being operated.
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| Background / Summary: |
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| Drawing Descriptions: |
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| Description: |
Show description
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| Forward References: |
Show 30 U.S. patent(s) that reference this one
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