US2110812A - Surfboard and propelling means therefor - Google Patents

Description

March 8, 1938. J NEGRl 2,110,812

SURFBOARD AND PROPELLING MEANS THEREFOR Filed Nov. 9, 1937 2 Sheets-Sheet l Inventor g wwb My m A tiorngys March s, 1938. J. NEGRI 2,110,812

SURFBOARD AND PROPELLING MEANS THEREFOR Filed Nov. 9, 1937 2 Sheets-Sheet 2 Inventor wjimev A4317 Attorneys ifatented Mar. 8, 1938 UNITED STATES PATENT SURFBOARD AND PROPELLING MEANS THEREFOR 3 Claims.

This invention relates broadly to surfboards and similar crafts, and an object of the invention is to provide improved means for use in conjunction with a surfboard or like craft for propelling the same.

The invention together with its objects and advantages will be best understood from a study of the following description taken in connection with the accompanying drawings wherein:-

Figure 1 is a side elevational view of a surfboard embodying the features of the present in- Vention.

Figure 2 is a top plan view thereof, and

Figure 3 is a perspective view of a propelling member.

Referring to the drawings by reference numerals it will be seen that 5 indicates an oblong fiat board which may be constructed from any suitable material and may be referred to as a surfboard.

In accordance with the present invention there is provided adjacent the forward end of the board 5 and in close parallel relation to the longitudinal edges of the board 5 elongated slots 6 to accommodate propulsion elements 1.

Each of the propulsion elements 1 comprises a slide 8 in the form of a flat bar provided on the underside thereof with a longitudinal rib 9 which is accommodated in a slot 6.

Suitably mounted on the rib 9 at opposite sides of the latter and adjacent the forward end of the rib are rollers it! which ride on the top surface of the board 5.

Adjacent the forward end thereof the slide 8 5 is provided with flanges or lugs H between which is supported a suitable hand grip l2.

Depending from the slide 53 and extending through the slide and its rib 9 is a rod H which serves as a pivot for a pair of blades or paddles 40 I l-l4.

The paddles or blades M are formed of any suitable material and at their upper and lower edges have secured by screws or other fastening elements it thereto hinge plates is which 45 at one end are provided with eyes H to accommodate the hinge rod l3.

The rod I3 is in the form of a bolt, inverted and having its upper threaded end extending through the rib 9 and slide 8 and equipped with a 50 nut l8.

Secured to one side of the rod l3 as at I9 is a stop block 20 against which the blade paddles l4 abut when said blades are in a propelling position which is in the extended position shown in Figure 3.

It will thus be seen that in using the surfboard 5 equipped with the propelling devices l the user 5 lies prone on the board 5 as shown in Figure 1 and grips in each hand thereof the handles l2 of the slides 8. Obviously by pulling on the slides 8 the latter will be caused to move rear- Wardly and the blades H5 in the extended posi- 10 tion shown in Figure 3 will present the maximum surface thereof against the water to propel the surfboard forwardly. On the return stroke the blades will close, as is thought to be apparent, and will then offer minimum resistance in the 15 passage of the device through the water.

It will thus be seen that the surfboard can be propelled by the action of the arms reciprocating the slides 8, the blades offering the maximum surface to the water on the propelling stroke and 20 feathering or closing on the return stroke.

It is thought that a clear understanding of the construction, utility and advantages of an invention of this character will be had without a more detailed description.

Having thus described the invention What is claimed as new is:-

1. A surfboard, a pair of slides mounted on said surfboard, said surfboard being provided with longitudinal slots, rods depending from said slides and extending through said slots, and a pair of blades hinged to the lower end of each of said rods.

2. A surfboard, a pair of slides mounted on said surfboard, said surfboard being provided with longitudinal slots, rods depending from said slides and extending through said slots, and a pair of blades hinged to the lower end of each of said rods, stops provided on said rods to be engaged by said blades during the propelling stroke of the slides.

3. A surfboard, a pair of slides mounted on said surfboard, said surfboard being provided with longitudinal slots, rods depending from said slides and extending through said slots, and a pair of blades hinged to the lower end of each of said rods, stops provided on said rods to be engaged by said blades during the propelling stroke of the slides, and each of said slides being provided with a hand grip.

J AMES NEGRI.

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