US2812220A

US2812220A - Portable collapsible scaffolding

Info

Publication number: US2812220A
Application number: US403477A
Authority: US
Inventors: James H King
Original assignee: Individual
Current assignee: Individual
Priority date: 1954-01-12
Filing date: 1954-01-12
Publication date: 1957-11-05
Anticipated expiration: 1974-11-05

Description

Nov. 5, 1957 J. H. KING PORTABLE COLLAPSIBLE SCAFFOLDING Filed Jan. 12, 1954 m -11.153 "INVENTOR ATTORNEYS United States Patent 2,812,220 PORTABLE COLLAPSIBLE SCAFFOLDING James H. King, Greensboro, N. C.

2 Application January 12, 1954, Serial No. 403,477

1 Claim. (Cl. 304-11) This invention relates to scaffolds and more particularly to scaffolds including brackets of the collapsible type, the brackets being so constructed that when not in use, the brackets may be folded into small and compact articles to facilitate storing and transporting of the scaffolds to various points of use.

An object of the invention is to provide a bracket of this character including a telescoping prop pivotally connected to the scaffold supporting bracket or frame, thereby adapting the scaffold for use at various heights and under various conditions.

Another important object of the invention is to provide an adjustable brace bar having means for assembling and adjustably connecting one end of the brace rod to the scaffold bracket in such a manner that one end of the brace rod extends above the bracket surface, providing a stop against which a scaffold platform or scaffold platform board contact, holding the scaffold platform or scaffold boards against lateral movement with respect to the bracket.

With the foregoing and other objects in view which will appear as the description proceeds, the invention consists of certain novel details of construction and combinations of parts hereinafter more fully described and pointed out in the claim, it being understood that changes may be made in the construction and arrangement of parts without departing from the spirit of the invention as claimed.

Referring to the drawing:

Figure 1 is a side elevational view of a scaffold bracket constructed in accordance with the invention.

Fig. 2 is a front elevational view thereof.

Fig. 3 is a plan view of the scaffold bracket.

Fig. 4 is a fragmental elevational view of the bracket with the prop and brace rod connected therewith.

Referring to the drawing in detail, the scaffold bracket comprises a prop 5, which prop includes an upper tubular section 6 and a lower tubular section 7, the lower tubular section 7 being telescopically fitted within the upper tubular section 6, as better shown by Fig. l of the drawing. Openings are formed in the

sections

6 and 7, the openings of the

sections

6 and 7 being arranged so that they will align to receive a-securing pin 8, whereby the

section

6 and 7 will be held in various positions of adjustment with respect to each other, to meet requirements of use. A handle 8' is provided on the lower end of the upper tubular section 6 for effecting adjustment of said prop.

At the lower end of the lower tubular section 7 is a foot 9, to which the lower tubular section 7 is pivotally connected, as at 10, the pivotal connection between the sections 7 and 9, being such that the prop may be tilted to the desired inclination, with respect to the surface on which the prop is positioned.

The bracket also includes a substantially triangular frame indicated generally by the reference character 11, the frame comprising a wide bar 12 and wide side bars 13 connected at the ends of the bar 12, the bars 13 converging towards what might be termed the outer end Patented Nov. 5, 1957 of the frame 11, where they extend in parallel relation with each other and engage opposite sides of the spaced bars 14. The spaced bars 14 have one of their respective ends welded to the side bar 13 at 15, the other ends of the bars 14 extending between the straight ends of the side bars 13, as better shown by Fig. 3. The reference character 16 indicates a brace which comprises an upper tubular section 17 and a lower tubular section 18 slidable within one end of the upper tubular section 17. The brace 16 is formed with an opening spaced from the upper end of the tubular section 17, which opening aligns with openings in the straight parallel end portions of the wide side bars 13 and parallel bars 14 for the reception of the securing pin 19 which holds the frame 11 and brace 16 connected. Because the opening through the upper end of the upper tubular section 17 is spaced a substantial distance from the upper end of the prop, an appreciable length of the upper tubular section 17 extends above the frame and provides a stop against which a scaffold platform or scaffold brace forming a platform, may engage to prevent lateral movement of the scaffold floor or floor boards which rest on the frame. Section 17 rests on a pin 24 which is positioned in one of the openings of section 18 of the brace 16.

The upper end of the upper tubular section 6 is pivotally connected between the parallel bars 14 at a point adjacent the center of the wide bar 12, the connection between the upper section 6 and frame, being made by a pivot pin 20, which pivot is also arranged in spaced relation with the upper end of the section 6 so that a substantial length of the upper tubular section 6 protrudes above the frame 11 to provide a stop for the scaffold platform against movement in one direction.

Extending laterally from the upper tubular section 6 and arranged in a line along the edge of the upper tubular section 6, are stirrups 21 which embody substantially U-shaped members, the side walls of which are provided with openings for the reception of the pin 22, which pin also passes through an opening formed in the car 23 secured at the lower end of the lower tubular section 18 pivotally connecting the brace 16 to the prop 5.

Due to the arrangement of the stirrup it will be obvious that the brace may be positioned at various angles to level the frame of the scaffold bracket.

From the foregoing it will be seen that due to the construction shown and described, I have provided a collapsible and foldable scaffold bracket made up of telescoping sections pivotally connected to a scaffold frame in such a way that the prop and brace may be readily removed and collapsed into a small and compact article for transporting or storing purposes.

While I have shown and described a single bracket, it will of course, be understood that these brackets may be arranged in spaced relation with each other along a Wall or building with which the scafiold is to be used in such a way that a scaffold platform or scaffold platform brace may be placed thereon without the necessity of bolting or otherwise securing the platform to the bracket, thereby providing a strong, rigid and adjustable scaffold.

Having thus described the invention, what is claimed is:

In a scaffold bracket, a substantially triangular horizontal frame having a base adapted to engage a wall surface, a pair of spaced parallel bars secured within the frame extending horizontally through the center thereof, a prop embodying inner and outer telescoping members, means for pivotally connecting the outer of said members between said parallel bars in contact therewith at the end of said bars adjacent the base of said triangular frame, a plurality of spaced open stirrups secured along the surface of said prop, a brace member having one of its ends pivotally connected between said bars at a point adjacent the apex of said triangular frame, an ear extending from the other endpf the brace member adapted to be fitted within a selected stirrup, a pin extending through said ear and stirrup in which the ear is mounted, pivotally connecting said bracemember to said prop, and a footpivotally connected to said inner telescoping member at its lower end.

References Cited in the file of this patent UNITED STATES PATENTS 4 Murray et al. Dec. 22, 1903 Ellinger Sept. .19, 1905 Roth May 7, 1907 Thrall Oct. 13, 1914 Thompson Dec. 12, 1922 Wertz Apr. 24, 1923 Thorne Apr. 16, 1946 Yench Dec. 11, 1951 Michalowski Apr. 21, 1953 FOREIGN PATENTS Germany May 15, 1927 Ita y May 3, 1933 Germany Mar. 1, 1935