US2790586A

US2790586A - Assemblies for wood ladder rungs

Info

Publication number: US2790586A
Application number: US354730A
Authority: US
Inventors: Herman J Troche
Original assignee: J H HOLAN CORP
Current assignee: J H HOLAN CORP
Priority date: 1953-05-13
Filing date: 1953-05-13
Publication date: 1957-04-30
Anticipated expiration: 1974-04-30

Description

April 30, 1957 H. J. TROCHE ASSEMBLIES FOR woos LADDER RUNGS Filed May 15, 1953 R.E H Y MG E O N ER R VT 0 N I J A N A M R ,E H

United States Patent 2,790,586 ASSEMBLIES FOR WOOD LADDER RUNGS Herman J. Troche, Fairview Park, Ohio, assignor to J. H. Hglan Corporation, Cleveland, Ohio, a corporation of 0 io Application May 13, 1953, Serial No. 354,730 6 Claims. (Cl. 22858) The invention relate to wood rung assemblies. Particularly, it relates to such assemblies for ladders. I have applied the invention to ladders forming a part of the installation and maintenance equipment for public utility lines, which equipment is operated from utility truck bodies. However, the invention is not limited to use on ladders for such purpose.

The main purpose of the invention is to provide an assembly of this character which can be quickly and conveniently applied and which will provide a very rigid structure.

The annexed drawing and the following description set forth in detail a structure illustrating the improvements in wood rung assemblies, such drawing and description presenting, however, only one of the various forms in which the principle of the invention may be embodied.

In said drawing:

Figure 1 is a front elevational view of a part of a ladder showing two ladder wood rungs at the both ends of each of which the improved rung assembly is applied;

Figure 2 is an elevational view of the right-hand side of the structure shown in Figure 1;

Figure 3 is a longitudinal section, on an enlarged scale, taken in the plane indicated by the line 33, Figure 1;

Figure 4 is an axial section of an end of a rung to which the improved rung assembly is applied, a broken section of a fragmentary portion of a ladder rail to which the rung is secured being also shown, the section being taken in the plane indicated by the line 44, Figure 3; and

Figure 5 is a front elevation of a two-part annular bracket forming part of the improved rung assembly.

Referring to the annexed drawing in which the same elements are indicated by the same respective numbers in the several views, a ladder has side rails 1 and cylindrical wood rungs 2. The invention is directed to an assembly of elements whereby each rung 2 is rigidly secured at its two ends to the inside faces of the side rails 1.

A split sleeve 3 is mounted on each end of the rung 2. Surrounding the outer end of this sleeve 3 is a two-part annular bracket, of which each part 4 has an inwardlyextended end ear 5. The bracket parts 4 are arranged in reversed relation and mated and form a substantially complete tubular member surrounding and engaging the sleeve 3. The sleeve 3 extends at its inner end beyond the bracket parts 4 and at its outer end is formed with a peripheral outwardly-extended flange adapted to seat in an annular notched area 12 formed centrally of and at the inner edges of the rail faces of the two bracket parts 4.

Riveted to each of the bracket ears 5 is the ear 11 of a clip 6 which is fastened by bolts 8 to the inside face of a ladder rail 1.

The elements described are at each end of the rung 2 together with inclined rail plates 7 which are secured by bolts 8 to and flush with the outside faces of the rails 1. The bolts 8 also secure the clips 6 to the inside faces of the rails 1.

A tie-rod 9, which is seated in the bottom part of the rung 2 and has its ends positioned between the bolts 8, is secured to the plates 7. For the securing of the tierod 9, which extends throughout the length of the rung 2 and into and through the rails 1, the tie-rod ends are threaded and are engaged by T nuts 13.

First, a sleeve 3 is assembled on an end of the rung 2. Then a pinching together of the split edges of the sleeve 3 is effected by the rivetting together of the

ears

5 and 11 of the brackets 4 and the clips 6 respectively. This pinching action closes the sleeve 3 into quite close abutting relation with and around the rung 2.

Application of the bolts 8 causes the shoulder 14 of the bracket parts 4 at the inner side of the notched area 12 to pull the sleeve 3 by the flange 10 tightly against the inner face of the rail 1. This action effects a tight clamping together of the sleeve 3, the bracket parts 4, and the rail 1.

When the assembly has been thus secured at both ends of the rung 2 against the inside faces of the two rails 1, the two rails are moved into rigid relative positions, and respectively tightly against the two ends of the rung 2, by the application to the tie-rod 9 of the nuts 13.

What I claim is:

1. In combination with a ladder having side rails and spaced rungs therebetween, an assembly for securing the ends of a rung to the side rails comprising a split sleeve adjacent each end of a rung and loosely surrounding the same, a two-part clamping means surrounding and engaging the sleeve, means for securing together the two parts of the clamping means to tighten the sleeve on the rung, means for fastening the clamping means to the rail, and means on the sleeve engaged by the clamping means by the fastening of the latter, su-ch engagement etfecting sliding movement of the sleeve on the rung and against the rail.

2. The structure of claim 1, in which said sleeve has an outwardly extending peripheral flange engaged by the clamping means as the latter is fastened to effect said sliding movement of the sleeve.

3. The structure of claim 1, in which said two-part clamping means comprises mating bracket parts each having an car, a clip securable to a rail for each bracket part, said clip also having an car, an ear of a clip being fastened to an ear of a bracket part.

4. The structure of claim 3, in which said fastening means comprise bolts passing through the rails and secured to the clips.

5. The structure of claim 1 in which a tie rod is incorporated with an within the rung and has threaded ends within the side rails, in which there are exterior plates for the side rails, in which the ends of the tie rod are engaged by T nuts abutting the exterior faces of the rail plates, and in which the fastening means for the clamping elements intersect the rail plates upon both sides of the tie rod T nuts.

6. The structure of claim 1, in which the sleeve has a peripheral outwardly-extended end flange, in which the clamping means is a two-part bracket mounted on the sleeve, in which the sleeve flange abuts the bracket, and in which the bracket has a central notched formation for reception of the sleeve flange, the fastening of the bracket moving the sleeve into engagement with the rail.

References Cited in the file of this patent UNITED STATES PATENTS 279,576 Leaycraft June 19, 1883 796,208 Hartzler Aug. 1, 1905 890,319 Wells June 9, 1908 949,194 Myer Feb. 15, 1910 1,186,621 Townsend June 13, 1916 2,359,952 Welger Oct. 10, 1944 2,570,730 Stroud Oct. 9, 1951 2,650,749 Balogh Sept. 1, 1953 FOREIGN PATENTS 8,206 Great Britain of 1901