U.S. patent number 3,902,568 [Application Number 05/528,227] was granted by the patent office on 1975-09-02 for scaffold step.
Invention is credited to Donald W. Erickson.
United States Patent |
3,902,568 |
Erickson |
September 2, 1975 |
Scaffold step
Abstract
Detachable steps to be spaced upwardly on the vertical legs of a
scaffold, and at a plurality of convenient heights to permit a
workman to safely reach the elevated platform of the scaffold. The
steps are intended to be spaced vertically and alternately on
adjoining faces of the legs of the scaffold for convenience in
stepping with the Right and Left foot. A saddle means is included
in the step to support a bar that supports spools of wire when the
scaffold is used by an electrician while doing wiring.
Inventors: |
Erickson; Donald W. (Racine,
WI) |
Family
ID: |
24104794 |
Appl.
No.: |
05/528,227 |
Filed: |
November 29, 1974 |
Current U.S.
Class: |
182/92;
242/129.6; 182/129; 248/243 |
Current CPC
Class: |
E04G
5/061 (20130101); E04G 5/06 (20130101); E06C
7/081 (20130101); E06C 7/16 (20130101) |
Current International
Class: |
E04G
5/00 (20060101); E04G 5/06 (20060101); E06C
7/16 (20060101); E06C 7/00 (20060101); E06C
009/04 () |
Field of
Search: |
;182/92,228,129
;242/129.6 ;248/238,235,217,221,246,245,244 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
Primary Examiner: Machado; Reinaldo P.
Attorney, Agent or Firm: Johnson; Axel H.
Claims
The above being a complete description of an illustrative
embodiment of the invention, what is claimed as new and desired to
be secured by Letters Patent of The United States is:
1. A portable step, for a scaffold having upright legs, each of
said legs defining a surface having upwardly-spaced apertures, said
step comprising a wall portion, one face of which is positionable
in contact with the surface of said leg, a plurality of hook
members integral with said face of said wall portion and spaced to
engage said apertures, a substantially-horizontal step panel
secured to the opposed face of said wall portion and extending
substantially normal thereto, a web having opposed surfaces and
positioned uprightly and normal to said wall portion and said step
panel and secured integrally thereto, a plurality of saddle
members, each of said saddle members being integral with, and
extending substantially normal to each of the opposed surfaces of
said web.
2. A portable step, for a scaffold as set forth in claim 1, in
which said saddle members are defined by integrally-adjoining
upright and horizontal walls extending normal to said web, said
horizontal walls directed toward said opposed surface of said wall
portion.
3. A portable step, for a scaffold as set forth in claim 1, on
which a non-slipping material is secured integrally on the upper
surface of said step panel.
Description
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention concerns detachable steps for scaffolds that permit
a workman to conveniently reach the elevated platform.
2. Description of the Prior Art
The prior art comprises steps to be removably mounted upon power
poles or the like and which can be removed when not used, to
discourage unauthorized climbing.
SUMMARY OF THE INVENTION
This invention comprises steps to permit a workman to safely reach
an elevated platform of a scaffold without danger of injury. These
steps discourage temporary use of available boxes or other
convenient means of reaching a platform, which use frequently
results in injury to a workman by falling. The steps of this
invention also include a convenient means of supporting a rod which
carries spools of wire for use in electrical wiring.
An object of this invention is to provide portable steps to permit
a workman to safely reach a scaffold platform. Another object is to
provide portable scaffold steps which can be conveniently removed
when not in use to discourage unauthorized climbing. Another object
is to provide steps that have the means to support a plurality of
wire spools therebetween.
Further objects and advantages of this invention will become
apparent from a consideration of the following detailed
description. It is, however, to be understood that the invention is
not to be limited to the details disclosed, but includes all such
variations as fall within the spirit of the invention.
Referring to the drawings:
FIG. 1 is a view of a vertical leg of a scaffold with parts broken
away, and showing a plurality of the steps of this invention,
nounted thereon.
FIG. 2 is a projectional view of FIG. 1, and showing (in dotted
lines) a plurality of wire spools supported by the steps.
FIG. 3 is a section taken at 3--3 of FIG. 1.
FIG. 4 is an enlarged view of a portion of FIG. 1 with parts broken
away to show details more clearly.
FIG. 5 is a projection of FIG. 4.
FIG. 6 is a section taken at 6--6 of FIG. 4.
A conventional scaffold comprises in this instance four vertical
legs 10 of angle iron and of a suitable length. Each leg is
provided with a caster 12 to permit moving the scaffold
conveniently about the work area. A platform 14 is supported on the
four legs and is adjustable to various heights. Both walls of the
angle-iron legs 10 are provided with vertically-spaced slots 16 as
the means of supporting the platform 14 and the steps 18.
The steps 18 comprise a wall 20. A step panel 22 is positioned
perpendicular to wall 20 and is welded or otherwise made integral
therewith. A web 24 provides the support for the step panel 22
relative to wall 20, and which web is welded or otherwise secured
to the step panel 22 and the wall 20.
Saddle members 26 extend normal to the web 24 and on both faces
thereof, and are welded or otherwise secured to the web. Saddle
members 26 are of an angle-iron shape in this instance, and their
purpose will be explained.
A pair of hooks 28 and 30 are welded or otherwise secured
integrally to the rear face of the wall 20. Hooks 28 and 30 have
downwardly-directed points 32, defining a space adjacent to the
wall 20 to receive the wall of the angle-iron leg 10. When placing
a step 18 at a desired position on a leg 10, hooks 28 and 30 are
simultaneously inserted into the slots 16 and the step 18 is
permitted to shift vertically to the position shown in FIG. 4: Thus
points 32 secure the steps 18 against disengagement from the leg
10.
As shown in FIG. 1, the steps 18 can be positioned 90 degrees apart
in horizontal planes; one step on each flange of the angle-iron leg
10, to accomodate a Right or left foot of the workman as he ascends
to the platform 14.
FIG. 2 shows, in dotted lines a plurality of wire spools 34 on a
bar 36, which bar is supported in the saddle members 26 of a pair
of steps 18; the latter being placed on flanges of legs 10 and
lying in a common plane, and conveniently within reach of a workman
standing on the platform 14. It is obvious that steps 18 can be
placed at various heights on legs 10 so that spools 34 can be
placed at any height desired.
A corrugated rubber or non-slip pad 38 is secured to the upper
surface of step plate 22 in order to prevent the shoe of the
workman from slipping when ascending to the platform. The exposed
surface of pad 38 is provided with corrugations as a further means
of preventing slipping.
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