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Патент USA US3032158

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May 1, 1962
M. L. BANK
3,032,148
COLLAPSIBLE WORK PLATFORM
Filed Jan. 29, 1958
5 Sheets-Sheet 1
INVENTOR.
MORTON L . BANK
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May 1, 1962
M. 1_. BANK
3,032,148
COLLAPSIBLE WORK PLATFORM
Filed Jan. 29, 1958
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INVENTOR.
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May 1, 1962
M. L. BANK
‘3,032,148
COLLAPSIBLE WORK PLATFORM
Filed Jan. 29, 1958
5 Sheets-Sheet 3
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INVENTOR.
MORTON L. BANK
BY
United States Patent 0 ” CC
'.'
1
3,032,148
Patented May 1, 1962
2
vided, and these are slidably adjustable vertically of the
3,032,148
respective end frames. Each side frame is extended be
tween and is connected to corresponding sides of the
end frames, and the side frames are pivotally connected
COLLAPSIBLE WORK PLATFORM
Morton L. Bank, 19 Adair Court, Malverne, N.Y.
Filed Jan. 29, 1958, Ser. No. 711,855
1 Claim. (Cl. 189—15.5)
at their ends to the end frames, so that the entire struc
ture can be collapsed or folded as in FIG. 2, with the
This invention relates generally to scaffolds, elevating
respective side and end frames being relatively pivotable
devices and the like, and more particularly has reference
about vertical axes de?ned by the legs 10.
to a generally improved device of this nature, that will be
Each side frame includes an elongated upper longi
particularly designed for use in any of a large variety of
tudinal member 26 of angle iron material, and at oppo
work situations.
site ends of the member 26 there are provided gusset
One important object of the invention is to provide an
plates 30, ?xedly secured to the member 26, and also
improved scaffold that will have a high degree of ver~
?xedly secured to sleeves 32 that have a ?xed connection
satility, in respect to the types of articles that can be
to the extremities of the member 26. Lower sleeves 34
lifted therewith, the elevations to which the articles can 15 are aligned vertically with the sleeves 32, each pair of
be lifted, and the relative elevations at which the worker,
aligned sleeves 32, 34 being slidable upon the associated
and the object or equipment supported by the device,
may be disposed.
Another object is to provide a device of the character
leg 10 between the lower cross brace and upper cross
brace 16 of the end frame. Thus, the side frames are
shown in their lowermost positions in FIG. 2, and in their
described that will have particularly effective, adjust 20 uppermost positions in FIG. 1.
able’ means that will constitute a safety rail for a worker,
Plates 30 are also rigid with connector bars 28 extend
and which can also be used as a support for objects be
ing in closely spaced, parallel relation to legs 10‘, and
inglifted.v
connecting bars 36 are also provided.
I»
'
v
»
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'
These are also
Another object is to provide a device of the character
connected between the sleeves 32, 34. As a result, there
stated that will be particularly designed for elevating 25 is provided a particularly strong connection of the side
equipment intoposition ‘in a very "short time and with
frames to the end frames, while still permitting the free
relative pivotal movement of the end and side frames.
Each side frame further includes lower longitudinal
members 38, extending between and ?xedly secured at
30 their ends to the lower sleeves 34. Chained pins are car
doorway, even one of very narrow width.
Still another object is to provide an elevating scaffold
ried by the sleeve members 34 for engaging the holes in
of the character stated that will be characterized by its
members 14 as shown in FIGURE 3.
high mobility, its adaptability for elevating both light
The structure also includes extension side frames gen
and heavy ?xtures, its adaptability to support a worker
erally designated 40. Each of these is of inverted U
minimumrelfortr.
»
'
Another object is to so form the scaffold as to permit
it to collapse to a size such that it can roll through a
with minimum strain and maximum safety, and its adapt 35 shape, including a horizontally disposed side rail 42 ?xed
ability for use as a mobile, folding work bench.
ly secured at its ends to sleeves 44, said sleeves being
For further comprehension of the invention, and of the
rigidly connected to the upper ends of vertically disposed
objects and advantages thereof, reference will be had to
extension legs 46. Legs 46 are secured in selected posi
the following description and accompanying drawings,
tions to which they are telescopically adjusted relative to
and to the appended claim in which the various novel 40 and within the legs 10, through the provision of drop
features of the invention are more particularly set forth.
pins 48, carried by chains 50, said chains being con
_ In the accompanying drawings forming a material part
neoted to the upper corners of the respective end frames
of this disclosure:
12.
'
FIG. 1 is a perspective view of a scaffold according to
the present invention.
45
,
7 FIG. ‘2 is a perspective view, slightly enlarged above
that of FIG. 1, showing the scaffold collapsed for pass
age thereof through a doorway.
-
'
. FIG. 3 is a still further enlarged. fragmentary per
spective view showing one corner portion of the scaffold. '
Legs 46 may be fully telescoped within legs 10 in the
manner'shown in FIG. 2, in the lowermost positions of
the extension side frames 40.
The extension side frames can be adjusted upwardly
to any extent desired, as shown in FIG. 1, and in each
position to which they are so adjusted. pins 48 are insert
FIG. v4 is a reduced, fragmentary perspective view
able through openings 54 spaced longitudinally of the
extension legs 46.
showing the scaffold equipped with protective side rails.
Referring to the drawing in detail, designated generally
By reason of this arrangement, the scaffold can be
extended in a vertical direction to a substantial height,
at 12 are identical end frames, disposed in vertical posi
tions and positioned transversely of the structure at op
posite ends thereof. Each end frame includes vertical,
as shown in FIG. 1, providing advantages in the con
struction which will be described in full detail hereafter.
Designated generally at 56 are jack devices. The jack
devices need not be described in detail hereinafter. since
tubular legs 10, and extending in closely spaced parallel
relation'to thelegs. at the inner sides of the legs, are
elongated tubular members 14, shown to best advantage
in FIG. 2. Members 14 at their upper ends are ?xedly
secured to upper cross braces 16, which at their ends are
?xedly secured to the upper end portions of the respec
tivelegs 10.
Fixedly connected between the interme
diate portions of the members 14 are spaced cross mem
thev are conventional per se.
It is su?icient to note that
each jack device includes, at its upper end, a U-shaped,
work-supporting head 57, and as shown in FIG. 3, the
jack devices can be mounted wherever desired upon the
scaffold to permit vertical adjustment of the heads 57
relative to the portion of the scaffold that is supporting
the jack devices.
Thus. each iack device includes a support bar 58,
he's 18, while ?xedly connected between the lower ex 65
extendable slidably through an opening of a support
tremities of the members 14 is a lower cross brace 20,
the lower cross brace 20 also being ?xedly secured to
bracket 60. mounted at a selected location upon the hori
the lower end portion of the right end. The members 14
zontal rails 38. or format matter upon any other hori
have spaced holes 15 therealong. Swiveled wheels or
zontal rail portion of the scaffold. Brackets 60 may be
casters 22 are provided at the lower ends of legs 10. r
provided with clamping means, to permit the same to be
securely clamped in position. Bars 58 have a ?xed con
A pair of longitudinal or side frames 24 are also pro
3,032,148
3
4
nection,~-through the provision of connecting bars 62, to
the housing 63 of'each jack‘ device; At its upper end,
to the ceiling. The worker operating the jack devices,
and making'the‘ ?nal connection to the ceiling, can‘be
each bar 58 is secured to an upper clamp 64 connectable
supported upon the platform at any height found des1r
able, and found to be most suited to carrying out of the
to any suitablehorizontal member, as for example the
member 42 in FIG. 3, orthe member 16 in FIG.,2.
' Wherever the jack ‘device is mounted, its movable bar
particular work operation. The platform, in other words,
is vertically adjustable independently 0f’ the work~
65 can be shifted vertically within the housing 63, to
supporting heads 57 of the jacks.
locate head 57 at a selected elevation.
Y The device also includes transverse extension frames,
While the worker is performing the necessary Work
operations, he may be fully protected by a guard frame,
which guard frame can comprise any combination of
extension transverse frames‘ 66 or extension side frames
of which there can be any number, to permit transverse
support or guard frames to be erected to any desired
height. Each transverse frame includes a crossbar 66,
’
73. Still further, the worker'can mount the jack device
rigid adjacent its ends'with depending portions 68. The
even upon the‘ extension,'side, or end frames, to'obtain
even further elevation of the work.
depending legs or portions 68 of the lowermost trans
verse frames 66 may be seated in associated sleeves 44 15
The extension frames 66 or 73, in fact, are themselves
supported upon extension side frames 40, so that it‘ will
of side frames 40. Each frame 66 further includes an
be apparent that a wide range of adjustments, a wide
upwardly opening socket or opening 70, adapted to re
range of protective railings, and an equally wide range
ceive the legs 68 of the next higher frame 66. This is
of locations and ways in which work pieces can be sup
clearly shown in FIG. 3 and obviously, the transverse
frames'can be built up at the respective ends of the de 20 ported and lifted, are possible through use of the device.
While I have illustrated and described the preferred
vice, to extend the end frames in a vertical direction, to
embodiment of myyinvention, it is to be understood that
any extent desired. The transverse frames66 serve the
further function of providing cross bracing for the ex
I do not limit myself to the precise construction'herein
disclosed and that various changes and modi?cationsfmay
tension side frames 40, as will be clearly seen from
25 be made ‘within the scope of the invention as de?ned, in
FIG. 1.
A platform ‘72 is hingedly connected, along one side,
the appended claim.
'
'
"
'
t
Having thus described my invention, what I claim as
to one of the side rails 42 in any suitable mannerso that
the platform can swing downwardly when not in use, to
new, and desire to secure 'by United‘ States -,"Letters_‘
permit collapsing of the structure. When the platform
is swung upwardly as in FIG. 3, its respective longitudi 30 A scaffold, comprising a-pair eof~vertical end frames,
each of said end frames including spaced, hollow,'-verti*
nal edges seat in the angle iron vmembers 26 as shown in
FIG. 3. The hinge connection of the platform to the
cal tubular legs, tubular members disposed vertically and
parallel to the respective legs, said members having
rail 42 is completely separable, so that the platform can
spaccd holes therein, cross braces disposed horizontally
be operatively positioned as in FIG. 3, supported upon
the side frames 24. The platform is thus vertically ad 35 joiningsaid legs and members, a pair of rectangular side
frames, each of said side frames including vertically dis
justable with the side frames, and serves to rigidifythe
posed sleeve members disposed at ends thereof and slid
structure so that it will not accidentally collapse to the
Patent is:
'
>
‘
~
ably engaged on said legs, chained pins ‘carried by said
FIG. 2 position thereof.
sleeve membersand engageable in the holes'in said tu
The device also includes extension side frames shown
in FIG. 4. These have been generally designated at 73 40 bular members for supporting said side frames in selected
positions on and between the end frames, said sideframes
and are identical in structural and functional character
having upper, angle bars providing horizontally extending
istics to the transverse frames 66, with the exception, of
?anges for supporting a rectangular platform there
‘course, that they are substantially, longer than the frames
between, end rail assemblies detachably mounted upon
'66. Thus, each side frame 73 includes depending legs
74- rigidly secured to the end portions of an elongated 45 the respective end frames, said end rail assemblies in
cluding a plurality of like horizontal end rail members
member 75. Members 75 have upwardly opening sock
and depending leg elements, each horizontal rail mem
ets 76, adapted to receive the legs 74 of the next higher
Considering the various uses to whichthe devices may
ber having openings receiving the leg elements of the rail
member immediately above the same, the leg elements
Once inside the room in which it is to be used, the
member‘ immediately thereabove.v
‘side frame 73.
'
be put, it willbe noted, ?rstly,_from FIG. ZYthat the 50 of the lowermost rail’?rnember being telescopically and
adjustably engaged in the legs of the endframes, and
device can be collapsed to a substantially flat condition
side rail assemblies detachably mounted on the respective
having a relatively small transverse dimension and a low
end rail assemblies, each side rail assembly including'an
height, sufficient to permit theentire scaffold to be rolled
elongated horizontal rail member and depending leg
through a narrow doorway. In an actual working em—
bodiment, the scaffold has been easily movable through 55 members, each rail member of theside rail assemblies
having openings receiving the leg members of the rail
"18-inch doorways of ordinary height.
scaffold isradjnsted to its rectangular, working position
shown in FIG. 1. The platform is positioned uponthe
respective side frames 24, and the side frames 24,are
60
References Cited in the ?le of this patent
UNITED STATES PATENTS
adjusted vertically to ,whatever extent is desired. The
worker may thus be supported at a high elevation, or at
any selected lower elevation.
'
When the platform is a'low elevation, the worker may
even, use the same as a Work bench, while standing on 65
the floor. The jack devices may be located wherever de
sired, and might, for example, be locatedrwhere shown
in FIG. 1. In these circumstances, one may position a
large object, such as a ?uorescent lighting ?xture, upon
-
1,943,871
2,062,473
12,203,113
2,285,901
2,290,450
Landberg ____________ __ Jan. 16, 1934
1936
1940
Norton ______________ _.. Dec. ‘1,
Uecker et al. __________ __ June 4,
Chenowith ___________ __ June 9,
'Renschin ___' _________ __ July 31,
1942
1942
2,311,988
Lavin _____________ .._.'_._ Feb. 23, 1943
2,335,046
Droeger ____________ __ Nov. 23, 1943
2,468,186
‘Du Perret ______ -g ____ __ Apr. 26, 1949
the head 57. Then, by operation of the jack devices, said 70 2,593,122
‘Droeger et al. ________ __ Apr. 15, 1952
?xture may be raised so as to be held directly against the
2,599,670
Thomas ' _____________ __ June 10, 1952
ceiling at a desired location, While} b¢illg ?xedly attached
2,882,100
Bank _______________ __ June‘14, 1959
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