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Патент USA US2405505

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Augn-6, 1946.
?led July 5, '1945 '
7 2,405,505
Patented Aug. 6, [1946
.1‘ NT
2,405,505 I
Albert J. Kleidon, New Brighton, Minn.
Application .l'uly 5, 1945, Serial No. 603,298
4 Claims. (01'. 187-10)
' My invention relates to a load carrying truck
to be used particularly
combination with a lad
der and has for its primary object the provision
of such a device which can be utilized to vcarry
comparatively heavy loads up and down the lad
der with ease.
' supporting ‘end board It is secured to the forward
ends of upstanding ?anges l3 so as to be in a
position approximately at right angles to the
side frame members 6.
Journalled to the rear end of side frame mem
bers 6, by means of a transverse axle 15, are a pair
of laterally spaced wheels it which, as shown, are
on the ‘inside of frame members 6 in a position
to ride upon the upper surfaces of the side rails
Another object of my invention is the provision
of a truck and ladder combination which, when
used on a roof, or the like, will climb partly on
to the roof so as to facilitate removal of the items 10 E of the ladder I.
carried by the truck.
Near the front end of frame members 6 is an
Another object of my invention is the provision
axle 5? which spans the distance between the side
of hoisting means for said truck.
members 6 and projects laterally outwardly from
A still further object of my invention is to pro
each side thereof sufficiently atlB to provide a
vide a device for the above purposes which is 15. journal for a pair of Wheels I9.' Also, journalled
economical to manufacture, rugged in construc
to axle ll‘ is a pair of wheels 20 which, as shown,
tion, and easy to operate and maintain.
are on the inside of side frame members 6 and
'The above and‘ other objects of my invention
are spaced so ‘as to run upon the top surface of
will become apparent from the following speci?~
side rails 2 of ladder I.
cation and attached drawing.
It will be observed that the diameter of wheels‘
" Referring to the drawing, wherein like charac
is‘ much less than the diameter of wheels 19,
ters indicate like parts throughout the several
the importance of which will hereinafter become
apparent. It is also important that the diame~
Fig. l is a side elevation of my novel construc
ter of the rear wheels [6 be considerably greater
tion shown as being used on a roof, one position
than the diameter of the wheels 20.
of the truck being shown by dotted lines;
Fig. 2 is a plan view of the truck;
Fig. 3 is a sectional view taken on the line €i~—3
of Fig. 2; and
Fig. 4 is a fragmentary perspective view of the
Referring with more particularity to the draw
ing, the numeral l indicates a ladder in its en
tirety, made up of laterally spaced side rails 2
and rungs 3. In Fig. 1, the ladder I is shown as I‘
having its lower end on the ground and its upper
end resting against the eaves 4 of a conventional
roof 5.
My novel truck is shown as preferably having
a load supporting frame comprising elongated,
Referring now particularly to Figs. 1' and 4,
the under surfaces of the side rails 2 of ladder l
are provided each with a bearing boss 2| through
which is journalled for rotation, a shaft 22 which
projects out one side at 23 and has a crank 211
secured thereto. Secured to said shaft 22 for ro
tation therewith, and adjacent each side of hear
ing bosses 2|, are four enlarged guide ?anges 25
which prevent lateral shifting‘of the same.
It will be observed that the guide flange 25
adjacent the crank 24 is provided with a plurality
of circumferentially spaced peripheral notches
26. Pivoted at 2'! to the side of rail 2 of ladder
l in a position so that its free end drops into
engagement with slots 26 by action of gravity, is
spaced parallel side members 6, which are con
nected by a transverse connecting member ‘I in
a pawl 28.
the front, and another transverse member 8 in
be wound thereabout by rotation of the same, is
the rear.
a rope or cable 29, the free end of which extends
under the rungs of the ladder upward to a pulley
Side members 6 are preferably, and as
shown, matched and have depending guide por
tions 9 near their front ends, and similar guide
portions II) at their‘ rear ends. For the purpose
of greater rigidity, and also for the purpose of
providing load carrying supports, I provide a pair
of transverse bars H and also a pair of crossed
struts l2. As will be seen, members II and I2
are countersunk or otherwise made flush with the
top surface of side frame members 6.
The rear ends of side frame members 6 are pro
vided with upstanding ?anged ends I 3, A load
Secured to the rotary shaft 22, in a manner to
member 30 which is located midway between the
side rails 2 of ladder l near its upper end and
which rotates upon a non-rotary shaft 3|. Shaft
3! is secured to the side rails 2 of the ladder in a
plane substantially corresponding to the under
surface of the same.
This is made possible by
supplementary end pieces 32 rigidly secured to
the under surface of the side rails 2 at their up
per ends. The extreme outer end of rope or cable
3 29 is secured to the truck at its rear end and
preferably to a screw-eye, or the like 33, con
nected to the central portion of cross member 8.
When it is desired to transport loads up and
down the ladder with my novel device, the truck
This last mentioned feature is important be
cause it enables the operator to remove this load
from the truck without leaving the roof.
Having described a commercial form of my in
vention in compliance with Section 4888 of the
statutes, it should be obvious that my invention
is capable of various modi?cations and altera
tions, all within the scope of the appended
by dotted lines in Fig. l. The pawl 28, under the
action of gravity, will fall into one of the periph
eral notches 26 in guide ?ange 25 and thus, by 10 What I claim is:
1. In combination with a ladder having par
preventing further uncoiling of the rope or cable
allel side rails, a load carrying truck, said truck
29, the truck will be locked against further down
comprising elongated parallel side frame mem
ward movement. A number of bundles or shin
bers spaced apart a distance greater than the dis
gles, or the like, may then be placed upon the
tance between the side rails of said ladder, trans
load carrying supports II], If and I2. The up—
verse front and rear connecting members, a pair
right end board 14 will prevent the load from
of spaced wheels journalled to the rear ends of
falling backward th'erebeyond.
said side frame members and adapted to ride on
To lift the load, the crank 24 is wound‘ in a
the side rails of said ladder, a pair of wheels
clockwise direction with respect to Figs. 1 and 4,
thereby causing the rope or cable 29 to wind 20 iournalled to the front ends of said side frame
- members and adapted to ride on the rails of said
itself around shaft 22 and elevate the truck and
ladder, and a pair of wheels also journalled to
load to any desired position. While the truck
is lowered on the ladder l to a position shown
is on the ladder the large set of wheels IS on the
back and the small set of wheels 20 in the front
ride upon the top surface of the side rails 2 of v
the ladder I. The diameter of the rear wheels
[6 is much greater than that of the front wheels
the front ends of said side frame‘ members and
positioned laterally outwardly therefrom, the di
ameter of said last mentioned pair of wheels be
ing considerably greater than the diameter of
the other pair of front Wheels.
2. The structure de?ned in claim 1 in which
the pair of wheels located at the rear of said
20 for the speci?c purpose of decreasing the angle
of the load carrying surface of the truck with re
spect to the angle of the ladder, thus making it, 30 truck are considerably greater in diameter than
the forwardly disposed pair of wheels located
easier to keep the load on the truck in its ascent
between the side frame members.
up the ladder.
3. The structure de?ned in claim 1 in further
It will be observed, that because the rope or
combination with guide means associated with
cable 29 is anchored to the back end of the truck
said side frame members for preventing lateral
at 33, and also because of the position of the
shifting of said truck on said ladder.
pulley 30 near the upper end of the ladder I, that
4. The structure de?ned in claim 1 in further
it is possible to elevate the truck to a point where
combination with hoisting means associated with
the upper wheels leave the side rails 2 of ladder
said ladder and said truck for raising and lower
I so that the front end of the truck falls onto
the roof 5. Of course, when this happens the 40 ing the truck along the rails of the ladder, and
means for preventing lateral shifting of said truck
large front wheels l9 bear the weight as the front
as the same is moved up and down on said ladder.
end of the truck travels the remaining distance
on the roof.
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