Патент USA US2404044код для вставки
Ju?y i, 1946. M. FALK I - 2,404,044 PROPELLING DEVICE Filed Aug. 23, 1945 2 Sheets-Sheet l INVENTOR. an. 6A ATTORNEY. ' uHy E6, 1946. M. FALK 2,404,044 PROPELLING DEVICE ‘ Filed Aug. 25, 1945 2 Sheets-Sheet 2 / B ~15 INVENTOR. 7” ATTORNEY. Patented July 16, ‘1946/ 2,404,044 UNITED STATES V ' PATENT OFFICE ‘ 2,404,044 I ' ‘ . PRQPELLING DEVICE ‘ Marcus Falk,‘Boston, Mass. Application August 23, 1945,-Serial No. 612,190 ' ‘ l 4 Claims. (01. 170%141) 1 . This invention relates to a propelling device for a boat. One object of my invention is to provide a new and useful propelling device-one that is pro tected and guided by the same means during the 2 said guide member l2, propeller body l5 and bracket 18-, said propeller body rotating on it». Said scoops iii are outside of but rotate close to understood, may be accomplished by a construc the rounded, peripheral surface of said guide member l2, except when their path of rotation is below it, opposite said surface l3. Fixed to said propeller body I5 is a stud 22 on which a connector head 24 is mounted, to which head 24 a connecting rod 25 is fastened which tion and arrangement of parts, such as is dis 10 in turn is actuated by a well known motor or the major part of its rotative travel. The foregoing and other objects which will ap pear as the nature of the invention is better closed by the drawings and speci?cation. The like, not shown, thus driving said propeller H] nature of the invention is such as to render it by a crank-like motion which forcibly brings said susceptible to various changes and modifications, and, therefore, I am not to be limited to said disclosure; but am entitled to all such changes scoops l6 into contact with the water as said ward. therefrom as fall within the scope of my claims. peller I0 is rotated reversely and said back i511 In the drawings: ‘ Figure 1 is a top plan view of my propelling device attached to a boat, and body I5 is rotated, thus propelling the boat for To propel in a reverse direction said pro pushing against the water will cause a reverse movement of said boat B. The number of scoops l6 carried by propeller Figure 2 is a side elevational view of the same. 20 body [5 may be varied, depending upon the size Figure 3 is a sectional view taken on the line of said body IS, the speed desired, et cetera, and -3—3 of Figure 2 and Figure 4 is a sectional view taken on the line 4~4 of Figure 2. Figure 5 is a front elevational view of my de vice attached to the stern of a boat. Figure 6 is an enlarged, perspective view of a propeller scoop or blade showing a fragment of the propeller body. likewise their size may be varied. The width of said guide member l2 at its rounded periphery, should be at least equal to ‘ the width of a said scoop 16. If said guide mem her is hollow its lower edge It‘ shouldbe closed. In operation, a motor actuates said connecting rod .25 which in turn rotates said propeller [0 by a crank-like motion which carries said scoops Figure 7 is an enlarged, perspective view of 30 I 6 into the water during part of their travel, thus the propeller guide member mounted to a sup driving the boat forward. porting bracket that is attached to a boat. What I claim is: As illustrated, a propeller H) is associated with l. A propelling device comprising a propeller a stationary guide member H! which is partly embodying a body portion having a plurality of circular, being more than half but less than a 35 blades, at the periphery thereof, a guide member whole circle. Its lower edge I 3 is horizontal or associated therewith having a portion of its truncated or, at least, there is a break in the peripheral surface curved and a portion straight, continuity of the circle. Said propelling device means to support said member and propeller has a circular disc-like body portion IS on the periphery of which are blades or scoops l 6 which 40 adapted to be connected to a boat, and means operatively connected to said propeller to rotate have a rear portion or back Ilia and a side l?b. it, said blades being outside of, opposite to and Said body l5 serves as another side. Said scoops adjacent said curved peripheral surface. , l6 taper in depth as they curve inwardly towards 2. A propelling device comprising a propeller said body portion l5 as shown in Figure 2 of the drawings. The inner surfaces of said scoops I6 45 embodying a body portion having a plurality of scoops at the periphery thereof that extend lat are closed to the peripheral surface of said guide member I2 and, therefore, its sides are lower, erally beyond said body portion, a guide member having a portion of its peripheral surface in the form of a partial circle and having a non-circular opposite said guide member I'Z during the rota 50 portion, said scoops being so positioned on said body portion with relation to said guide member tive movement. curved peripheral surface that said scoops pass Said guide member I2 is ?xedly attached, as at a point outside of, adjacent and opposite to by welding, to a supporting bracket 18. Said said circular surface, means to support said guide bracket l8 may be attached to the stern of a boat B by bolts M. A stud I9 extends through 55 member and propeller adapted to be connected to avoid having said scoops I6 holding any ap preciable amount of water while they are located 2,404,044 3 r“ to a boat, and means operatively connected to said propeller to rotate it. 3. A propelling device comprising a propeller embodying a body portion having a plurality of blades at the periphery thereof that extend lat erally beyond said body portion, said blades em 4 4. A propelling device comprising a propeller embodying a body portion having four scoops at the periphery thereof, that extend laterally be yong said body portion, said scoops embodying a back, a bottom and a side portion and being so positioned that a portion of said body provides bodying a back, a bottom and a side portion and a side for said blade opposite to but spaced from being so positioned that a portion of said body said side portion, said side portion tapering in wardly from said back, a guide member in the provides a side for said blade opposite topbut spaced from said side portion, a guide member 10 form of a partial circle that is more than half a circle and whose lower edge is truncated, said in the form of a partial circle that is more than half a circle and whose lower edge is truncated, said scoops being so positioned with relation to scoops being so positioned with relation to the portion, the width of the peripheral surface of 1 said circular portion of said guide member being > as great as the width of said scoops, means to support said guide member and propeller adapted 20 to be connected to a boat, and means operatively cular portion of said guide member being as curvedportion of said guide member that they pass at a point outside of, adjacent and opposite the curved portion of said guide member’ that’ they pass at a point outside of, adjacent and op v15 to the peripheral surface of said circular portion, the width of the peripheral surface of said cir posite to the peripheral surface of said circular connected to said propeller to rotate it. great as the width of said scoops, means to sup-, port said guide member and propeller adapted to be connected to a boat, and means operatively connected to said propeller to rotate it.‘ MARCUS FALK.