US2628011A - Flexible roof ladder - Google Patents

Description

Feb. 10, 1953 F. P. BUECHLER 2,628,011

FLEXIBLE ROOF LADDER Filed Sept. 20, 1949 2 SHEETS-SHEET 1 F rant/s P. Buech/er INVENTOR.

Feb. 10, 1953 F. P. BUECHLER FLEXIBLE ROOF LADDER 2 $HEETSSHEET 2 Filed Sept. 20, 1949 r w Z am at P .m m Wm H w w 4 w l o J k at 8% M 8 & a. M o J .0. r m w w Patented Feb. to, 1953 UNITED STATES PATENT oFF1cE 1 Claim.

This invention relates to ladders, and more" particularly to flexible ladders for attachment upon a roof of a'buildingQ An object of the invention is to provide an easily portable flexible roof ladder which may be readily engaged upon anytype of existing roof.

A' further object of the invention is to pivotally secure articulated sections of a flexible ladder together.

A still further object of the invention is to provide a flexible roof ladder which is simple in con-' struction, cheap to manufacture, easy to carry, compact and strong -in-structure, and safe in operation for use upon roofs of existing buildings.

These, together with various additional objects which will become apparent as the following description proceeds, are attained by this device, a preferred embodiment of which has been illustrated in the accompanying drawings, wherein Figure 1 is an elevational view of the flexible roof ladder showing it in emplacement upon one type of roof;

Figure 2 is a side elevational view of the ladder showing it in a folded position for carrying;

Figure 3 is a plan view in enlarged scale, of several sections of the invention;

Figure 4 is a perspective view of the side rails forming one element of the roof ladder;

Figure 5 is a side elevational view of the hook comprising another element of the invention;

Figure 6 is a perspective view of the cylindrical spaces which are used in the flexible roof ladder;

Figure 7 is a perspective view of the rungs used in the present invention; and

Figure 8 is a vertical sectional view of that connection between the various elements of the invention, taken along 8--8 in Figure 3.

With continued reference to the accompanying drawings, wherein like numerals designate similar parts throughout the various views, reference numeral I0 is used to generally designate the improved flexible roof ladder comprising the present invention.

This ladder is capable of being placed upon an existing roof of a building for effecting repairs thereon, or for such other purpose as the use might desire.

The latter comprises a plurality of articulated sections constructed from opposed pairs of side rails or straps l4, having their ends bent upwardly as at I6 and I8, respectively, and inwardly as at 2|] and 22, then downwardly as at 24 and 26, then inwardly as at 28 and 30 to form loops 32 and 34. The inwardly extending portions 28 and 30 are parallel to the central portion of the side rails, and are secured thereto in contact I therewith by rivets 36 or the like.-

The pair of rungs 38, having end portions All .and 42 of reduced sectional area are inserted within the loops of the side rails Withthe shoulders 44 and 46 adapted to provide means whereby the rails may be spaced from one another. Therefore, a pair of the rungs 38 are positioned with the ends 40 and 42 inserted between a pair of loops 32 and a pair of loops 34 of a pair of side rails M. The pair of side pieces or bars 48 are secured at apertured ends by means of lag bolts or combined fasteners and pivots 50 to the ends id and 62 of the rungs 38. The side pieces 48 are preferably made from aluminum, stainless steel or other light weight non-corrosive free material. The rungs are made from any desired hard wood.

At one end of the articulated sections are a pair of substantially Z- shaped members 52 and 54. The members are secured at one end thereof by means of lag bolts to the end of a rung 38. At the converging ends 56 and 58 is positioned a cylindrical spacer to having an aperture 62 therethrough.

The bolt 64 extends through the aperture 62 in the cylindrical spacer and secures the members 54 and 52 with the enos b8 and 5b in spaced relationship. A pair of hook members 66 and 68 having their hooked ends connected by means of a cross bar in are positioned and secured to the spacer 60 at their shanK ends by having the shank end bent around the spacer to form a loop which is designated by reference numeral 12.

The ladder, as is easily understood, can be made in any desired length by merely limiting the number of articulated sections which are put together. Since the side pieces 48 are pivotally connected by the lag bolts fidto the rungs 38, the sections of the ladder are easily folded upon one another as shown in Figure 2, whereby the ladder is clearly portable.

Since the overall width between the hook members 66 and 68 is not as great as the distance between the side rails M, the hook then may be dropped between the side rails when the ladder is in folded position.

To put the ladder upon a roof, one man may do the job himself in a various number of simple ways. Firstly, he could use a rigid ladder to emplace the flexible ladder on the roof, the rigid ladder being positioned against the vertical side of the house or building. Alternatively, one man may carry the ladder up through a roof scuttle and he then can position the ladder by merely hooking it in proper position. Still another means of securing the ladder to a roof would be to attach one end of a rope or otherwise to the hook end of the ladder, and pass the other end of the rope over the house of the other side. Then, the rope could be pulled upon which will cause the ladder to be pulled up the roof until the hook passes over the top thereof and becomes engaged therewith. By simply continuing to pull the linethe ladder-may then be easily removed from the roof.

Since from the foregoing, the construction and advantages of the flexible roof ladder are readily apparent, it is not believed that further description will be necessary.

However, since numerous modifications and.

shown and described, but all suitable modifications and equivalents may be resorted to which fall within the scope of theappended claim.

Having described the invention what-is claimed as new is:

A roof ladder including articulated sections each comprising spaced parallel side straps, an integral closed loop on each end of each strap,

-said loops being rectangular with upper and lower portions positioned parallel to the main portions of the straps, a pair of elongated fibrous rungs, said rungs being rectangular and having upper and lower fiat faces, said upper faces 4 having notches at the ends of the rungs, the ends of the rungs extending through the loops, the upper portions of the loops being located in the notches and the lower portions of the loops extending transversely across and contacting the lower faces of the rungs to form means for spacing the rungs from a roof surface engaged by the said lower portions, parallel side pieces connecting one of said sections to anothersection, said side pieces extending partially across the loops, and combined pivots and fasteners extending through the ends of the side pieces and into the end of the rungs to retain the loops engaged with the ends of the rungs, the straps and the lower portions of the loops being coplanar and parallel to the plane of the undersurface of the rungs to provide tractionsurfaces that extend between adjacent rungs.

FRANCIS P. BUECHLER.

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

UNITED STATES PATENTS

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