US2803389A

US2803389A - Combined boom and platform support

Info

Publication number: US2803389A
Application number: US532482A
Authority: US
Inventors: Munson George Elmer
Original assignee: Individual
Current assignee: Individual
Priority date: 1955-09-06
Filing date: 1955-09-06
Publication date: 1957-08-20
Anticipated expiration: 1974-08-20

Description

Aug. 20, 1957 e. E. MUNSON 7 2,803,389

COMBINED BOOM AND PLATFORM SUPPORT Filed Sept. 6,-l955 2 sheets-sheet 1 L Illii) INVENTOR GEORGE [ZMER Mun/sow.

ATTORNEYS Aug. 20, 1957 G. E. MUNSON COMBINED BOOM AND PLATFORM SUPPORT 2 Sheets-Sheet 2 Filed Sept. 6,-1955 INVENTOR GEORGE ELMER MU/VSON ATTORNEYS United rates COMBINED BODM AND PLATFORM SUPPQRT George Elmer Mnnson, Fenton, Mich. Application September 6, 1955 Serial No. 532,432

2 Claims. (Cl. 22860) This invention relates to a combination ladder boom and platform support, and more specifically, the invention pertains to a boom and platform support comprising an attachment adapted for detachable connection with the upper end of a ladder.

Another object of this invention is to provide a combination boom and platform support of the type referred to above which is of substantial strength and constructed of light weight materials.

A further object of this invention is to provide a combined boom and platform support of the type to which reference has been made above, together with means for rotatably supporting the boom thereof.

A still further object of this invention is to provide a combined boom and platform support which when connected with the upper ends of a plurality of ladders form a supporting means for scaffolding or other similar types of platforms.

This invention contemplates as a still further object thereof the provision of a combined boom and platform support which may be economically manufactured, which is non-complex in construction and assembly, and durable 1n use.

Other and further objects and advantages of the instant invention will become more manifest from a consideration of the following specification when read in conjunction with the annexed drawings, in which:

Figure 1 is a side elevational view of a combined boom and platform support constructed in accordance with the present invention.

Figure 2 is an end elevational view of the combined boom and platform support shown in Figure 1.

Figure 3 is a top plan view of the combined boom and platform support.

Figure 4 is an enlarged detail cross-sectional view taken substantially on the line 4-4 of Figure 3, looking in the direction of the arrows.

Figure 5 is an enlarged detail cross-sectional view taken on the horizontal plane of line 5-5 of Figure 2, looking in the direction of the arrows.

Figure 6 is a perspective view illustrating the use of the ladder attachment as a platform support, the boom having been removed therefrom.

Figure 7 is a perspective view of the combined boom and platform support illustrating the same as being connected with the upper end of a ladder and serving the function of its boom.

Figure 8 is a perspective view similar to Figure 6, Figure 8 illustrating the attachment as being utilized with a plurality of ladders to support scaffolding or other similar types of platforms.

Figure 9 is an enlarged fragmentary perspective view showing the inner locking action between the ladder and the combined boom and platform support.

It should be understood that in the following specification, the component elements of the combined boom and platform support shall be, wherever possible or feasible, constructed of extruded aluminum or magnesium.

2,803,389 Patented Aug. 20, 1957 Referring now more specifically to the drawings, reference numeral 10 designates, in general, a combined boom and platform support constructed in accordance with. this invention. As illustrated therein, the combined boom and platform support 10 comprises a pair of substantially hollow rectangular housings 12 which have a substantially chevron configuration when viewed from the side in the manner illustrated in Figure l. The housings 12 are integrally formed and comprise apair of oppositely disposed, spaced and substantially

parallel side walls

14,16 and a pair of oppositely disposed, spaced and substantially

parallel end walls

18, 20, and the confronting adjacent side walls 14 are each provided with confronting ladders rung receiving

slots

22, 24, one adjacent each: end thereof.

A substantially hollow tubular elongated spacer rod 26 is Welded at 28 to the confronting, adjacent side walls 14 adjacent. the slots 24, and a hollow tubular elongated sleeve 30 iswelded thereto at 32 and is in open com munication with the interior of each housing 12 at each of its opposed ends.

As is seen in Figure 1, the sleeve 30 is positioned substantially at the apices of the housings 12 and the ends thereof are aligned with a pair of hollow bosses 36 which also open into the interior of the housings 12. The bosses 36 are welded at 38 to the side walls 16.

An elongated hollow tubular pipe 49 is telescoped Within the sleeve 39 and the bosses 36 and are welded at 42 to a pair of thrust collars 43 which engage against the outer ends of the bosses 36. An elongated second hollow tubular' pipe 44 has one of its ends fixedly and rigidly connected to one end of the pipe 40 and projects laterally therefrom at substantially right angles thereto. A third elongated hollow tubular pipe 46 has one of its ends rigidly and fixedly secured to the other end of the pipe 44 and projects laterally therefrom at right angles in spaced substantially parallel relation relative to the pipe 40. The other end of the pipe 46 is connected to one end of an elongated hollow tubular pipe 48 which projects laterally away therefrom at right angles relative thereto and in spaced substantially parallel relation with respect to the pipe 44. The other end of the last mentioned pipe is fixedly and rigidly secured with the other end of the pipe 40.

Each of the pipes 44 and 48 have their respective adjacent confronting sides fixedly secured to the

arms

50, 52 of a channel member 54 having a bight 56, as shown in detail in Figure 4. The bight 56 is provided with a plurality of longitudinally spaced apertures 58 which are aligned with a plurality of longitudinally spaced pairs of diametrically opposed

apertures

66, 62, the function of which will be described below.

An elongated substantially hollow tubular standard 64 having a pair of opposed open ends has one of its ends fixedly secured by welding 66 to the sleeve 3%) intermediate the ends thereof and projects laterally and upwardly away therefrom at a right angle relative thereto. The standard 64 has rigidly and fixedly secured thereto adjacent its open upper end the outer ends of the arms 67, 68 of an elongated channel member '76 having a bight 72. The arms 67, 68 are provided (see Figure 5) with a plurality of longitudinally spaced pairs of aligned apertures '74, 76 to serve a function to be described. An elongated substantially hollow tubular boom 78 has its stem portion 59 telescoped within the standard 64, and the upper end portion thereof terminates in an arcuately shaped boom-head 82 in the free end of which is mounted an axle 84 that rotatably supports a pulley or sheave 86. A hollow tubular cross-brace 83 has one of its ends fixedly se cured adjacent the free end of the boom-head 82, and its other end aflixed to the upper end of the stem 80.

A pair of elongated hollow tubular members 90 have one of their respective ends flattened at 92 and are apertured for selective alignment with selected pairs of aligned openings formed in the arms 67,68 of the channel member 70. A bolt 94 extends through'these aligned apertures and is removably locked in place by wing nuts 96. The members 90 diverge downwardly and the other ends 98 thereof are flattened and centrally apertured for selective alignment with the pairs of apertures 60, 62 formed in the pipes 44, 48 and the apertures 58 formed in the channel members 54 therefor. Bolts 100 extend through these aligned openings and are removably secured therein by wing nuts 102.

' From the foregoing description 'it is now evident that the

bolts

94 and 100 provide means whereby the angularity of the open rectangular frame formed by the

pipes

40, 44, 46 and 48 relative to the standard 64 may be selectively adjusted.

The utility of the present invention is illustrated in Figures 6 to 8, inclusive. In Figure 6, the attachment 10 is inverted from the position shown in Figures 1 and 2, and the housings 12 are mounted on the upper ends of a pair of stringers 194 of a ladder 106 which includes a plurality of longitudinally spaced rungs 108 which extend therebetween. In this case, the uppermost riser 108A engages within the slots 24 and the standard 64 depends downwardly from the above described open rectangular frame. In this case the boom 78 is removed from the standard 64 and the frame is clear of all encumbrances to receive a platform or other similar devices. In Figure 8, a pair of ladders 106 are illustrated as carrying similarly positioned attachments 10 to support a scafiold 110 therebetween.

In Figures 7 and 9 the attachment 10 is shown with the slots 22 engaged by the riser 108A together with the standard 64 and boom 78 in erect position. In Figure 7 the pulley 86 is shown as having a line 112 trained therearound, and one end thereof being connected with one of the ends of guide lines 114 while their other respective ends are fixedly secured to the corners of a tray 116. The boom 78 being telescoped in the standard 64 may be pivoted to the dotted line positions shown in Figures 1 and 2.

Having described and illustrated one embodiment of this invention in detail, it will be understood that the same is offered merely by way of example, and that the invention is to be limited only by the scope of the appended claims.

What is claimed is:

l. A combined boom support and ladder spacing device comprising a pair of tubular ladder leg encompassing members, means including a socket member secured to each of said members and extending therebetween, .a tubular bracket extending upwardly from said socket memher, a ladder support extending laterally from said socket member and being pivotally carried thereby, a brace extending from the free end of said ladder support to the top end of said tubular bracket, a boom telescopically positioned in said tubular bracket and having at its outer 7 end means for lifting a load from the ground.

2. A device as claimed in claim 1 wherein said tubular ladder leg encompassing members are notched at their lower ends to engage over the top rung of a ladder.

References Cited in the file of this patent UNITED STATES PATENTS 799,782 Ellinger Sept. 19, 1905 2,212,384 Brandel Aug. 20, 1940 2,592,006 Burke Apr. 8, 1952 2,680,554 Dakin June 8', 1954 2,732,264 Smith Jan. 24, 1956