US2386215A - Boat - Google Patents

Description

BOAT

Filed May 19, 1944 5 Sheets-Sheet a I 'OCt. 9, 1945. 3, HARVEY 2,386,215

i '4 i 1 M E In 1W1 for bawZdBf/zrvg EMZ W Patented Oct. 9, 1945 UNITED STATES PATENT OFFICE BOAT Harold B. Harvey, Pensacola, Fla.

Application May 19-, 1944, Serial No. 536,362

1 Claim. (01. 115 -19) I The present invention relates to new and useful improvements in boats, and has for its primary object to provide a vehicle f this character comprising propelling means of a unique construction and arrangement.

Another very important object of the invention is to provide a boat of the character described comprising a hull of novel shape whereby water and wind resistance will be reduced to a minimum.

Other objects of the invention are to provide a boat of the character set forth which will be comparatively simple in construction, strong, durable, seaworthy, attractive in appearance and which may be manufactured at low cost.

All of the foregoing and still further objects and advantages of the invention will become apparent from a study of the following specification, taken in connection with the accompanying drawings wherein like characters of reference designate corresponding parts throughout the several views, and wherein:

Figure 1 is a top plan view of a boat constructed in accordance with the present invention.

Figure 2 is a view in side elevation thereof with the rear end portion of the propeller broken away.

Figure 3 is a view in bottom plan of the boat.

Figure 4 is a view in longitudinal section through the propelling means, taken substantially on theline 4-4 of Figure 1.

Figure 5 is a view in transverse section, taken substantially on the line 5-5 of Figure 1.

Figure 6 is a view in transverse section, taken substantially on the line 6-6 of Figure 4.

Figure 7 is an enlarged fragmentary view in transverse section, taken substantially on the line 1-1 of Figure 4.

Referring now to the drawings in detail, it will be seen that the embodiment of the invention which has been illustrated comprises a, hull of suitable dimensions and material which is designated generally by reference character I. The hull l includes a bottom 2 of substantially the shape shown to advantage in Figures 3 and 5 of the drawings.

Extending longitudinally into the hull I from the stern thereof is a recess 3. Thus, the stern portion of the hull l is divided into what may be considered a pair of spaced, parallel stabilizer 4. The bottoms of the stabilizers 4 are stepped, as at 5.

A cabin 6 is provided in the hull l forwardly of the recess 3. The cabin 6 rises above the deck I of the hull Fixed on the transom 8 which extends between the stabilizers 4 at the rear of the cabin 6 is a substantially bullet-shaped, stationary inner shell 9. A suitable engine It! is mounted in the shell 9. Mounted centrally in the shell 9 is a longitudinal propeller shaft ll.

The rear end portion of the shaft ll extends through a suitable bearing 12 which is provided therefor on the rear end portion or nose I3 of the shell 8. In the embodiment shown, the forward end portion of the shaft II is journaled in a bearing I4 on the engine It. The engine Ill drives the shaft ll through a belt and pulley connection [5.

Mounted on the shell 9 is a propeller which is designated generally by reference character IS. The propeller 16 includes a substantially bulletshaped, rotary outer shell I! which encloses the stationary inner shell 9 in spaced relation thereto. Suitable bearings I 8 are provided for the outer shell ll. Fixed on the outer shell I! and extending substantially from end to end thereof is a'spiral fin or blade l9.

A drive connection 20 is providedbetween the shaft H and the propeller It. This connectionincludes an internally toothed ring 2| which is fixed in the nose portion 22 of the shell ll. Fixed on the rear end portion of the shaft l I is a gear 23 which is meshed with the teeth of the ring 2|.

It is thought that the operation of the boat will be readily apparent from a consideration of the foregoing. Briefly, the power plant If) rotates the propeller I6 on the stationary inner shell 9 through the belt and pulley drive ii, the haft l l and the connection 20. Thus, the substantially spiral fin or blade I9 is caused to turn in the water and simply function substantially in the manner of an auger for propelling the boat. A. continuous bite is had in the Water from end to end of the fin or blade l9. The engine l0 may be controlled from the cabin 6 in any desired manner. Also, any suitable means may be provided for steering the boat.

It is believed that the many advantages of a boat constructed in accordance With the present invention will be readily understood, and although a preferred embodiment of the boat is as 40 illustrated and described, it is to be understood that changes in the details of construction and in the combination and arrangement of parts maybe resorted to which will fall within the scope of the invention as claimed.

What is claimed is:

A boat comprising a hull having a recess extending longitudinally thereinto from the rear end thereof and providing a pair of spaced, parallel, rearwardly extending stabilizers, a cabin in the hull forwardly of the recess, a transom extending between the stabilizers and constituting the rear wall of the cabin, an elongated, stationary inner shell fixed on the transom and communicating with the cabin, said inner shell extending rearwardly in the recess between the stabilizers, a power plant in the inner shell, an outer shell rotatable on the inner shell, a, spiral blade on said outer shell, and meansoperatively connecting the power plant to the outer shell for propelling the boat.

HAROLD B. HARVEY,

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