US2427667A - Hoist and transport apparatus - Google Patents

Description

p 1947- H. H. GILBERT 2,427,667

HOIST AND TRANSPORT APPARATUS Filed March '7, 1945 3 Sheets-Sheet l a H b l i= W gnaw/whorl HAROLD H GILBART,

P l947- H. H. GILBERT V 2,427,667

HOIST AND TRANSPORT APPARATUS Filed March 7, 1945 v 3 Sheets-Sheet 2 FIG. 3.'

Sept. 23, .1947. H. H. GILBERT HOIST AND TRANSPORT ARPARATUS Filed March 7, 1945 3 Sheets-Sheet 3 HAAOZD 6. 6415527" Patented Sept. 23, 1947 STATES PATENT OFFICE- (Granted under the act of March 3, 1883, as amended April 30, 1928; 370 O. G. 757) Claims.

The present invention relates to improvements in hoisting and transporting apparatus and more particularly to hoisting and transporting apparatus for boats or other weighty objects.

An object of the invention is the provision of a hoisting and transporting apparatus which is Simple in construction and requires a minimum of material to build it.

Another object is to provide a hoisting and transporting apparatus for boats or other objects which has improved maneuverability and capability to enter the water at the beach and to embrace or receive a boat or other object, and to hoist the boat or the like from the water or beach, or to lower and launch a boat from the hoist.

Another object is the provision of such an apparatus providing greater safety to the operating personnel.

A further object is to provide a hoisting and transporting apparatus with means to prevent damage to the boat or other object received thereby.

Other objects and advantages of the invention will be more apparent from the following description taken in connection with the accompanyin drawings, which are exemplary, and in which:

Fig, l is a side elevation of an apparatus embodying the invention.

Fig. 2 is a view of a detail.

Fig. 3 is an end elevation of the apparatus.

Fig. 4 is an enlarged view of a portion of the apparatus.

Fig. 5 is a plan view of the apparatus.

Referring to the drawings, the apparatus comprises a frame structure including a gallows frame I supported by two preferably pneumatic tired wheels 2 which are preferably cantilevered on the inside of the frame I b axles 3 mounted in boxings 3 secured to the frame l.

The boxin s 4 which contain the Wheel axles 3 are connected to the substantially horizontally disposed yoke 5 which has a central draw bar 6 for connection to a suitable draft means such as a caterpillar tractor.

The gallows frame I is preferably braced to the horizontal yoke 5 by means of two diagonal braces 1, one on each side, as shown in the drawing. The substantially upright gallows frame desirably is inclined outboard slightly as shown in Figs. 1 and 5, and may desirably be at an angle of approximately 96 to the horizontal yoke 5, or at an angle therewith such as to substantially oifset or balance the weight of the horizontal yoke 5 on the tongue of the tractor or the like by throwing tension into the diagonal braces 1.

The gallows frame I also desirably includes a pair of angularly disposed strut or brace members 8 which extend from intermediate points of attachment 9 on the side members of the frame I and converge to meet at a central point of attachment II] on the top member of the frame I.

A cross beam l extends between and is secured to the members 8 near their apex. The cross beam I! carries the hoist blocks and tackle desirably comprising a set of four-sheave wire rope upper and lower blocks l2 and I3 and hook 20, which are used to lift the boat or other object up into the gallows frame for transportation thereof.

These hoist blocks are used to either lift the boat or the like out of the water or from the beach or to lower the boat or the like into the water or elsewhere. The hoist blocks are desirably operated by a two drum winch or other suitable apparatus which may be mounted on the rear of the tractor (not shown) Means are provided according to the invention for relieving the hoist block of the load of the boat after it is hoisted into the apparatus and while it is being retained in hoisted position for transportation or other purposes. These means comprise strap members l4, desirably of wire rope, suspended from the cross beam II which carries the upper hoist block l2. The straps may desirably be provided with eyes l5 at their upper ends received in eye-bolts or the like It secured to the crossbeam II. The straps l4 are preferably provided at their lower ends with shackles H the bolts l8 of which may be passed through pad eyes 19 on the lower block l3 when the load is in the raised position. By releasing the hoisting apparatus, the straps 14 take the load of the boat or other object, until it is desired to again lower the boat, for example, after transportation in the apparatus, when the hoisting apparatus may again be operated to assume the load, so that the shackle bolts may be released, and the boat lowered, as will be obvious.

In order to give ready access to these straps, ladder rungs, as indicated, are preferably provided, welded or otherwise secured to the strut members 8.

The hoist line 2| from the hoisting blocks passes therefrom over a fairlead sheave 22 in a block 24 supported at the top of a set of upwardly converged standards or leg members 23, the lower ends of which are suitably secured to and supported by the horizontal yoke frame 5 and tongue 6. One drum of the two drum winch on the tractor, may be used to operate the line 2| and the main hoist.

A second fairlead sheave 25 is provided in the block 24 receiving a line 26, which may be operated by the other drum of the two drum winch on the tractor, to lift the bow of the boat or end of the object, by means of the hook 21, against the check chains 28. The check chain 28 are suitably connected to the frame of the apparatus, and in the embodiment shown, are connected to the corner brace members 29 which extend between the braces and the members 30 of the yoke 5 and are secured in any suitable manner.

The central draw bar 6 of the horizontal yoke 5 is joined intermediate its length to the two converging members 30 of the yoke 5, and is desirably joined to a transverse brace member 3| extending between the members 30.

The drawbar 6 of the hoist is preferably directly connected to the tractor or other draft means by a hinged swive1 joint 32 which takes care of the misalignment of the hoist and the tractor, such as occurs in turning or when one wheel of the hoist is higher than the other or otherwise at a different level or angle from that of th tractor.

The invention involves the mounting of the large rubber or pneumatic tired Wheels 2 at the inside of the gallows frame, preferably in a cantilevered manner, but in any event sufficiently large and so disposed as to provide an effective cushioning bumper or fender for the boat or other object, which prevents it from being damaged by striking the frame as when dashed thereagainst by the surf. This eliminates the necessity of wrapping parts of the frame of the hoist With cushioning material such as manila rope.

The provision of a hoist having a single set of wheels has the advantage of greater maneuverability and greater safety to operating personnel. Since it has only two wheels or a single set of wheels and is directly connected to the tractor, it is much easier to back down over a boat, and otherwise to maneuver, than is the case with the type of apparatus employing two sets of wheels.

In order to make th hoist in a size and with capacity to lift larger boats or objects, the invention contemplates the provision of dual wheels at each side by extending the axles 3 and placing the additional wheels 211 on the outside of the frame as indicated in broken lines in Figs. 3 and 5.

It has been found that the hoist of the present invention is extremely useful for lifting landing craft and other boats out of the water or launching them from the beach and has been in use at an advanced Pacific island base where it was designed and built. The hoist of the present invention is of great usefulness in salvage after a landing operation as well as in various boat pool repair units. 7

In using the hoist for hoisting boats a sling 33 may desirably be used, as indicated in Figs. 3 and 5, for engagement by the hoist hook 20. The boat or other object is designated by the numeral 34, suspended by the sling and main hoist intermediate the length of the boat.

The hoist may be constructed of any suitable material, and the joints or connections between the parts thereof may be made in any suitable way. As shown, by way of example, I-I section steel pilin'g has been used for the main portions of the gallows frame and yoke with steel member of other sectional shape being employed as braces and other parts. Wherever possible it is desirable to are weld the structur at the joints. However, sufficient joints are preferably bolted, as indicated by way of example, to provide for disassembly into smaller sections for shipment. Gussets may be employed at the joints where desirable as indicated, for example, at the welded joints at 35 and 36. Additional braces may be provided such, for example, as indicated at 31 and 38.

It will be understood that various changes in the construction and details of the device illustrated and described herein, may be made without departing from the spirit of the invention or the scopeof the appended claims.

The invention described herein may be manufactured and usedrby or for the Government of the United States of America for governmental purposes without the payment of any royalties thereon or therefor.

What is claimed is:

1. In a hoisting and transporting apparatus for boats or other objects, a substantiall upright frame for receiving said object, hoisting means carried by said frame to support and raise and lower the main load or weight of the boat or other object, and wheels mounted at the lower part of said frame and supporting the frame, said wheels being mounted at the inside of the sides of said frame and having rubber or other cushioning tires and being constructed and disposed and of a size to be engaged by the boat or other object being received and hoisted in the apparatus and to serve as cushioning fenders or buffers preventing damage to the boat by preventing the boat or other object from striking the frame.

2. In a hoisting apparatus for boats or other objects, a substantially upright frame for receiving said object, hoistin means carried by said frame and comprising an upper hoist sheave block secured to the frame, and a lower hoist sheave block suspended from said upper block and having a hoist hook thereon, and Strap means suspended from said frame independently of said upper hoist sheave and block, said strap means being constructed to .be removably secured to said lower hoist block to receive and securely retain the load of the hoisted object and to thereby relieve the hoist line and upper hoist block of said load upon release of said load by the hoisting line.

3. In a hoisting apparatus for boats or other objects, a substantially upright fram for receiving said object, hoisting means comprising hoist blocks and hoist line carried by said frame to support and raise and lower the main load or weight of the boat or other object, a substantially horizontal yoke member secured at one end to the lower end of the frame, a sheave block supported on standards at the outer part of said yoke member and receiving said hoist line over a sheave in said sheave block, a second sheave in said sheave block, a second hoist line passed over said second sheave and having means thereon for attachment to the adjacent end of the boat or other object, and check chains attached to the yoke structure for attachment to the sides of the boat or other object to limit the upward hoisting movement of the end of the object by said second line.

4. In a hoisting and transporting apparatus for boats or other objects, a. substantially upright frame for receiving said object, a pair of angularly disposed brace members meeting centrally of the top member of the frame, a cross beam, hoisting means carried by said crossbeam to support and raise and lower the main load or weight of the boat or other object, supporting wheels mounted in axle boxings at the lower part of said frame, a substantially horizontal yoke member secured at one end to the wheel axle boxings at the lower end of said frame, substantially diagonally disposed brace members connecting the upper part of said frame with the yoke member, said yoke member having converging portions at its outer end connected to an intermediate part of a draw bar, a transverse brace member connected between said converging portions and secured to the inner end of said draw bar, and corner brace members extending between said converging members and said diagonally disposed brace members, said draw bar having a hinged swivel joint at its outer end for connection to a suitable draft means.

5. In a hoisting apparatus for boats or other objects, a substantially upright frame for receiving said object, hoisting means carried by said frame and comprising an upper hoist sheave block secured to said frame, and a lower hoist sheave block suspended from said upper block and having a hoist hook thereon, a plurality of straps or the like secured to said frame independently of said upper hoist sheave and block and disposed at either side thereof, and means for removably Number connecting the lower ends of said straps with the opposite sides of said lower moist sheave block to receive and securely retain the load of the hoisted object and to thereby relieve the hoist line and upper hoist block of said load upon release of said load by the hoist line.

HAROLD H. GILBERT.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS

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