US2888152A - Pivoting davit - Google Patents

Description

May 2 6, 1959 s 2,888,152

PIVOTING DAVIT f Filed April 18, 1956 3 Sheets-Sheet 1 INVENTOR George M. Sugg A I %1 I ATFORNEy May26, 1959 G. M. SUGG 2,888,152

PIVOTING DAVIT Filed April 18, 1956 SSheets-Sheet 2 FIGS @i FIG 6 INVENTOR George M. Sugg I ATTORNEY,

3 Sheets -Sheet 3 May 26, 1959 GrM. sues pxvo'rmc DAVIT Filed April 1a, 1956 2,888,152 Ice Patented May 26, 1959 PIVOTING DAVIT George M. Sugg, Daytona Beach, Fla.

Application April 18, 1956, Serial No. 579,026

3 Claims. (Cl. 214-1) This invention relates to davits and more particularly to movably mounted davits, pivoting about a single vertical axis.

An important object of the invention is to provide a small boat handling apparatus or davit which preferably comprises a single crane which may be operated by but one operator.

Another important object is to provide such apparatus which is adapted to contact the boat at the gunwales only while supporting and moving the boat.

Still another important object is to provide an apparatus as described above, which supports a boat by clamping and bracket means removably connected with the boats gunwales While the boat is being manipulated by the app aratus.

Yet another important object is to provide such apparatus which i adapted to raise or lower a boat, rotate it through 360 of arc, and retain it with its transverse axis substantially vertical and above a wharf, dock, pier or deck.

Additionally, an important object is to provide a small boat handling apparatus or davit which is adapted to launch or raise a boat, tip the boat transversely so that its transverse axis i substantially vertical, swing the boat in various arcs for inspection, cleaning, painting and the like, yet the connection of the apparatus with the boat is such that it does not interfere with these operations and launching openations of the boat after painting will not mar the paint.

Other objects and advantages of the invention will be apparent during the course of the following detailed description of the invention, taken in connection with the accompanying drawings, forming a part of this disclosure, and in which drawings:

Figs. 1 to 4 inclusive are elevations of the small boat handling apparatus supporting a boat as follows:

Fig. l with the boat in a substantially horizontal position, below the horizontal plane of a deck of a pier as for launching or raising.

Fig. 2 with the transverse axis of the boat substantially vertical and the boat mostly above the horizontal plane of the deck.

Fig. 3 with the boat raised above the horizontal plane of the deck and the apparatus rotated to position the boat above the deck itself.

Fig. 4 with the boat of Fig. 3 lowered on its bottom upon the deck.

Fig. 5 an enlarged elevation of the small boat handling apparatus in a position substantially as shown in Fig. 1 but not in use.

Fig. 6 is a like elevation but of the apparatus as viewed from the pier and in a position substantially as shown in Fig. 2.

Fig. 7 is also an enlarged elevation, being a side elevation, of the small boat handling apparatus.

Fig. 8 is an enlarged horizontal section, substantially on the line 8--8 of Fig. 7.

Fig. 9 is an enlarged vertical section, substantially on the line 9-9 of Fig. 5.

In the drawings, wherein for the purpose of illustration is shown a preferred embodiment of the invention and wherein similar reference characters designate corresponding parts throughout the several views, the letter A designates, by way of example, a conventional pier, B a small boat of conventional construction and C the small boat handling apparatus.

The pier A, is shown in Figs. 1 and 7 as including vertical supports or piles 10, extending into a body of water (not shown) and extending upwardly therefrom and supporting a substantially horizontally-disposed deck 11, while the small boat B is shown in Figs. 1 to 4 inclusive and includes opposite : gunwales 15 and 16 and bottom 17.

The small boat handling apparatus C includes a fixed rigid support portion 20, best shown in Fig. 7 which may be a substantially vertically-disposed first tubular member 21 provided at its upper end with a flat-topped cap 22. At its lower end part, the member 21 may be provided with spaced apart openings 23 for association with means 25 to secure the member 21 to the pier A as at the pile 10 by means of bolt and nut assemblies 26' with the shanks of the bolts extending through suitable openings 27 in the pile and axially aligned with the openings 23. Of course, it is desirable to position the fixed support portion 20 as close to the pier A as possible.

Slidable longitudinally of and rotatable on the member 21'i a movable support portion 25, which is preferably a sleeve or second tubular member 26 having, as shown in Fig. 8, an interior diameter somewhat greater than that of the exterior diameter of the tubular member 21, whereby the two members are spaced apart. For example the ratio of this spacing as compared to the interior diameter of the member 21 may be substantially 1:9. Preferably at its end portions, the member 26 may be provided with a plurality of spaced-apart radially-extending bolt shank receiving openings 27 circling the member 21. The bolt and nut assemblies 28 associated with the openings 27 provide means, represented by the rounded heads 29 of the bolts, to space the two members 21 and 26 apart and provide bearings for ready rotation of the tubular member 26, and the shanks form supports for braces 45, 46 and 50 of the apparatus C to be later described.

Preferably the members 20 and 25 are of metal such as iron, steel or non-corroding metal.

Carried by the movable support portion 25 is a boom or truss 30 extending downwardly and outwardly and spaced from the portions 20 and 25. The boom may be a wooden one provided with a longitudinally-extending recess 31 opening at its upper end to receive securing means, such as a hook 32 with the bill thereof hooked about a crosspin 33 extending transversely through the boom 30 and into the recess 31. The crosspin may be the shank of a conventional nut and bolt assembly. At the lower end portion of the boom 30 is a crossbar 34, L-shaped in transverse section, disposed to extend outwardly from the planes of the opposite edges of the boom. The crossbar 34 may be secured to the boom 30 as by means of 1a gusset 35 bolted to the boom as by means of nut and bolt assemblies 36, and bolted to the crossbar 34 as by nut and bolt assemblies 37. The horizontal portion of the L-shaped crossbar 34 extends toward the support. portion 20 and, to its bottom face, at the end portions of the crossbar are shoes 38 which, with the crossbar forms in transverse section two inverted Ts. The crossbar 34 may be secured to the shoes by means of nut and bolt assemblies 39. There is also associated with the shoes 38 an upwardly-extending portion 40, preferably as wide as the shoe 38 and bolted to the upper portion of the crossbar 34 as by nut and bolt assemblies 41. The portion 52 of the shoe and the upwardly-extending poition 40 may be faced with a suitable resilient material, as elastic Webbing 43 and the elements at 42 and 43 provide means to contact the gunwale of a boat, with the portion 42 disposed in contact with the underside of the gunwale and the portion 4d disposed in contact with the outer face thereof.

In addition to the resilient material of the mean last described, I prefer to provide similar resilient material 44 at the upper portion of the boom, as in Figs. and 7 since the upper portion of the boom may be contacted by a boat, as will be described.

Suitable brace is provided to secure the boom 31) to the movable support portion 25, such as the pairs of lower braces 45 and 46, which may be secured at one like end of each to the portion 25 as by two of the lower nut and bolt assemblies 28, while other ends of the braces 4-5 and 46 may be secured to the boom as by nut and bolt assemblies 47 and 455. There is shown additional pairs of elongated braces 49 and 50 with the braces 50 secured, intermediate their ends, to two of the upper nut and bolt assemblies 28 and secured at one of their ends to the boom 38 as by nut and bolt assemblies 51. The braces 49 are secured at one like end of each, to the boom, as at 52 and, intermediate their ends, to an intermediate portion of the braces 50 as by nut and bolt assemblies 53. The other ends of the braces 49 and 59 are secured, as at 54 and 55 to a suitable support 56 which may be an upwardly extending base for the bearings for two winches 57 and 53 having horizontal axes of rotation and each provided with conventional manually controlled rotation preventing means.

The winch 57 is adapted to pay out and reel in a suitable flexible member 59, as a rope, trained over a sheave 60 mounted upon the cap 22 in any approved way, such as by not and bolt assemblies 63 and 64 (Fig. 6). The flexible member 59 extends to the book 37.. Reeling in of the flexible member 59 by means of the winch 57 will cause the movable support portion 25 and, of course, the boom 30 to move upwardly, and paying out of the flexible member will cause the movable support portion and boom to descend.

Adapted to be wound upon the winch 53 is a flexible member 61 (shown best in Figs. 5 and 6) having suitable means at its free end for attachment to the gunwale of a boat. This means may be a hook 62, adapted to hook under the gunwale of the boat.

In use, and referring first to Fig. l, the boat B is brought alongside the pier A and reasonably centered between the portions 32 oil the shoes 33 with the latter below the gunwale 16 just opposite the gunwale l5, and the boat on an even keel. The flexible member 61 is now payed out until the hook 62; may be hooked under the gunwale substantially as positioned in Fig. l and the flexible member 61 made taut. The winch 57 is next operated to reel in the flexible member 59 which will raise the boat on an even keel. If it is desired to position the boat as in Fig. 2, with the Winch 57 secured against rotation (as is well known in the art), the winch 58 is rotated to further reel in the flexible member 61, whereupon the boat will tip transversely on the portions 42 cf the shoes 33 and may be thus ailcd out and washed, since it is in easy reach from When the winch 57 is again operated ft in the flexible member 59, the boat will be raised the nwale 16 above the horizontal plane c the d d the winch 57 again secured against rotati r in: boat may now be manually rotated, to the position shown in Pi". 3 With its bottom 17 exposed. This makes possible inspection, cleaning and painting of the bottom and other portion of the outer surface of the boat without obstructions which would render inspection, cleaning and painting more or less difiicult.

deck 11.

cr tee Fig. 4 illustrates the boat again in a horizontal position but disposed upon the deck 11 (although it may be suspended above the deck) for, by way of example, painting the interior. It is believed now clear that the boat may be painted and launched without damage to the newly painted surfaces.

In the example shown the fixed support 20 is secured to the pier A but it is to be understood that this is merely by way of example and that the, fixed support may be embedded in concrete or otherwise securely mounted depending on the type of installation.

The support portions 20 and 25 with the boom or truss 30 provide, in association with the winch 5'7 and flexible member 59, crane means while the portions 4-2 of the shoes 38 provide first gunwale attaching and support means and the winch 58 flexible member 61 and its hook provide second gunwale attaching and support means and means for tipping a boat transversely on the first gunwale attaching and support means.

Various changes may be made to the form of the invention herein shown and described without departing from the spirit of the invention or scope of the following claims.

What is claimed is:

1. A small boat handling apparatus including a crane having an elongated upright member, a tubular member rotatably carried by said uprimt member and slidable longitudinally thereof and an upwardly extending boom carried intermediate the ends of said boom by the tubular member, gunwale support means for support contact with the bottom face and outer side face of a gunwale of a small boat upon movement of said boom and tubular member, said gunwale support means being carried wholly by said boom, means for fixedly securing said upright member to a horizontally-disposed support to extend upwardly therefrom, means for supporting said boat and for transversely tipping said boat upon said boom to rest thereon, carried by said tubular member and including a portion for detachably extending beneath and in contact with the opposite gunwale of said boat and reeling means carried by said tubular member for selectively simultaneously raising said boom and tubular member so that said gunwale support means and said portion are above the horizontal plane of said horizontal support, whereby said tubular support may be rotated to cause said boom to carry a boat thereon to a position above said horizontal support.

2. A small boat handling apparatus according to claim 1 characterized in that said gunwale support means is disposed at the lower end of said boom, and said reeling means includes a flexible member extending upwardly from said tubular member to said upright member and thence downwardly and is secured to the upper end of said boom.

3. A small boat handling apparatus according to claim 1 characterized in that said boom is carried by said tubular member by a plurality of braces, which braces are secured to said boom at spaced-apart locations intermediate the ends of said boom, and said gunwale support means is disposed at the lower end of said boom, and said reeling means includes a flexible member extending upwardly from said tubular member to said upright member and downwardly and secured to the upper end of said boom.

References Cited in the file of this patent UNITED STATES PATENTS

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