US2405505A - Ladder hoist - Google Patents

Description

Augn-6, 1946. A. J. KLEIDON LADDER HOIST filed July 5, 1945 Patented Aug. 6, 1946 UNIT o Ares LADDER HOIST Albert J. Kleidon, New Brighton, Minn. Application .l'uly 5, 1945, Serial No. 603,298

' My invention relates to a load carrying truck to be used particularly combination with a ladder and has for its primar object the provision of such a device which can be utilized to carry comparatively heavy loads up and down the ladder with ease.

Another object of my invention is the provision of a truck and ladder combination which, when used on a roof, or the like, will climb partly on to the roof so as to facilitate removal of the items carried by the truck.

Another object of my invention is the provision of hoisting means for said truck.

A still further object of my invention is to provide a device for the above purposes which is economical to manufacture, rugged in construction, and easy to operate and maintain.

'The above and other object of my invention will become apparent from the following specification and attached drawing.

" Referring to the drawing, wherein like characters indicate like parts throughout the several views:

Fig. l is a side elevation of my novel construction shown as being used on a roof, one position of the truck being shown by dotted lines;

Fig. 2 is a plan view of the truck;

Fig. 3 is a sectional view taken on the line i-3 of Fig. 2; and

Fig. 4 is a fragmentary perspective view of the winch.

Referring with more particularity to the drawing, the numeral l indicates a ladder in its entirety, made up of laterally spaced side rails 2 and rungs 3. In Fig. 1, the ladder I is shown as having its lower end on the ground and it upper end resting against the eaves 4 of a conventional roof 5.

My novel truck is shown as preferably having a load supporting frame comprising elongated, spaced parallel side members 6, which are connected by a transverse connecting member I in the front, and another transverse member 8 in the rear. Side members 6 are preferably, and as shown, matched and have depending guide portions 9 near their front ends, and similar guide portions II) at their rear ends. For the purpose of greater rigidity, and also for the purpose of providing load carrying supports, I provide a pair of transverse bars H and also a pair of crossed struts l2. As will be seen, members II and I2 are countersunk or otherwise made flush with the top surface of side frame members 6.

The rear ends of side frame members 6 are provided with upstanding flanged ends I 3, A load 4 Claims. (01'. 187-10) supporting end board It is secured to the forward ends of upstanding flanges l3 so as to be in a position approximately at right angles to the side frame members 6.

Journalled to the rear end of side frame members 6, by means of a transverse axle 15, are a pair of laterally spaced wheels it which, as shown, are on the inside of frame members 6 in a position to ride upon the upper surfaces of the side rails E of the ladder I.

Near the front end of frame members 6 is an axle 5? which spans the distance between the side members 6 and projects laterally outwardly from each side thereof sufficiently atlB to provide a journal for a pair of Wheels I9.' Also, journalled to axle ll is a pair of wheels 20 which, as shown, are on the inside of side frame members 6 and are spaced so as to run upon the top surface of side rails 2 of ladder I.

It will be observed that the diameter of wheels is much less than the diameter of wheels 19, the importance of which will hereinafter become apparent. It is also important that the diameter of the rear wheels [6 be considerably greater than the diameter of the wheels 20.

Referring now particularly to Figs. 1' and 4, the under surfaces of the side rails 2 of ladder l are provided each with a bearing boss 2| through which is journalled for rotation, a shaft 22 which projects out one side at 23 and has a crank 2 1 secured thereto. Secured to said shaft 22 for rotation therewith, and adjacent each side of hearing bosses 2|, are four enlarged guide flanges 25 which prevent lateral shiftingof the same.

It will be observed that the guide flange 25 adjacent the crank 24 is provided with a plurality of circumferentiall spaced peripheral notches 26. Pivoted at 2'! to the side of rail 2 of ladder l in a position so that its free end drops into engagement with slots 26 by action of gravity, is a pawl 28.

Secured to the rotary shaft 22, in a manner to be wound thereabout by rotation of the same, is a rope or cable 29, the free end of which extends under the rungs of the ladder upward to a pulley member 30 which is located midway between the side rails 2 of ladder l near its upper end and which rotates upon a non-rotary shaft 3|. Shaft 3! is secured to the side rails 2 of the ladder in a plane substantially corresponding to the under surface of the same. This is made possible by supplementary end pieces 32 rigidly secured to the under surface of the side rails 2 at their upper ends. The extreme outer end of rope or cable 3 29 is secured to the truck at its rear end and preferably to a screw-eye, or the like 33, connected to the central portion of cross member 8.

Operation When it is desired to transport loads up and down the ladder with my novel device, the truck is lowered on the ladder l to a position shown by dotted lines in Fig. l. The pawl 28, under the action of gravity, will fall into one of the peripheral notches 26 in guide flange 25 and thus, by preventing further uncoiling of the rope or cable 29, the truck will be locked against further downward movement. A number of bundles or shingles, or the like, may then be placed upon the load carrying supports II], If and I2. The up right end board 14 will prevent the load from falling backward th'erebeyond.

To lift the load, the crank 24 is wound in a clockwise direction with respect to Figs. 1 and 4, thereby causing the rope or cable 29 to wind itself around shaft 22 and elevate the truck and load to any desired position. While the truck is on the ladder the large set of wheels IS on the back and the small set of wheels 20 in the front ride upon the top surface of the side rails 2 of v spect to the angle of the ladder, thus making it,

easier to keep the load on the truck in its ascent up the ladder.

It will be observed, that because the rope or cable 29 is anchored to the back end of the truck at 33, and also because of the position of the pulley 30 near the upper end of the ladder I, that it is possible to elevate the truck to a point where the upper wheels leave the side rails 2 of ladder I so that the front end of the truck falls onto the roof 5. Of course, when this happens the large front wheels l9 bear the weight as the front end of the truck travels the remaining distance on the roof.

This last mentioned feature is important because it enables the operator to remove this load from the truck without leaving the roof.

Having described a commercial form of my invention in compliance with Section 4888 of the statutes, it should be obvious that my invention is capable of various modifications and alterations, all within the scope of the appended claims.

What I claim is:

1. In combination with a ladder having parallel side rails, a load carrying truck, said truck comprising elongated parallel side frame members spaced apart a distance greater than the distance between the side rails of said ladder, transverse front and rear connecting members, a pair of spaced wheels journalled to the rear ends of said side frame members and adapted to ride on the side rails of said ladder, a pair of wheels iournalled to the front ends of said side frame members and adapted to ride on the rails of said ladder, and a pair of wheels also journalled to the front ends of said side frame members and positioned laterally outwardly therefrom, the diameter of said last mentioned pair of wheels being considerably greater than the diameter of the other pair of front Wheels.

2. The structure defined in claim 1 in which the pair of wheels located at the rear of said truck are considerably greater in diameter than the forwardly disposed pair of wheels located between the side frame members.

3. The structure defined in claim 1 in further combination with guide means associated with said side frame members for preventing lateral shifting of said truck on said ladder.

4. The structure defined in claim 1 in further combination with hoisting means associated with said ladder and said truck for raising and lowering the truck along the rails of the ladder, and means for preventing lateral shifting of said truck as the same is moved up and down on said ladder.

ALBERT J. KLEIDON.

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