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Патент USA US3028153

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April 3, 1962
D. B. CHESKIN
3,028,143
LIF‘TING APPARATUS
Filed March 30, 1959
5 Sheets-Sheet 1
VC
Figure /
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Rod Supporf/'ng
Bracket
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Figure 2
/N VEN TOR:
Dov/d B. Chas/rin
BY
A TTORNEY
April 3, 1962
D. B. CHESKIN
3,028,143
LIF'TING APPARATUS
Filed March 50, 1959
3 Sheets-Shea?I 2
Figure 5
/Frame A’
Figure 4
38
40
37
/N VE/V TOR:
Dav/'d B. Chas/rin
BY
y@ folëffw
April 3, 1962
D. B. cHEsKlN
3,028,143
LIFTING APPARATUS
Filed March 30, 1959
5 Sheets-Sheet 3
f nm e
A
I
Il
36
42
/ /V VE/V TOR.
Dav/'d B. Chas/rin
A TTO/PNEY
United States Patent O
3,028,143
Patented Apr. 3, 1962
1
2
3,028,143
of any floor slabs such that after the pouring of the
plurality of floor slabs is effected, they may be lifted
in a horizontal fashion by suitable jacking means, up
LIFTING APPARATUS
David B. Cheskin, 407 S. Dearborn, Chicago, Ill.
Filed Mar. 30, 1959, Ser. No. 802,870
2 Claims. (Cl. 254-105)
wardly and around the various columns to the required
heights or levels. Each floor slab is left at its desired
vertical level and is attached to the columns by means
of suitable collars, brackets, and the like which connect
with the slabs and with the columns by means of bolting,
This invention relates to a lifting apparatus suitable
for raising heavy loads to high elevations more partic
ularly, the apparatus is adapted to work with one or
more vertical columns of any height to effect the lift 10
welding or other attachment means.
It may also be deemed desirable to use shear-heads
ing of any type of heavy load.
Fairly heavy loads can be lifted with block and tackle
or with geared Winches and the like; however, really
of structural sections which are connected integrally with
the floor slab and to effect attachment of such shear
heads to the vertical columns by welding or other attach
heavy loads must be lifted with one or more types of
ment means.
The shear-heads are constructed and ar
jacks which must operate through a limited height or 15 ranged to closely encompass the various vertical columns
range. Jacks as such, whether hydraulic or otherwise,
and slide around them as the ñoor slabs are lifted into
are usually not adapted to lift heavy loads to any great
place and then effect the transfer of loads to the columns
height as, for example, for several floors.
from the floor slabs.
Briefly, the present improved lifting apparatus em
The present improved apparatus is also of particular
bodies in combination a rod supporting bracket having 20 advantage in the vertical setting of heavy loads, such as
means for removably clamping it to a column, means
iloor slabs and the like, in that the apparatus is provided
holding at least one pair of vertically suspended notched
with incremental or accurate adjustment means permit
rods from the supporting bracket in an opposing sym
ting fine or close vertical adjustment to any level regard
metrical arrangement with respect to the column, a first
less of the height to which it is brought by means of the
frame having an open central portion and adapted to 25 vertically suspended notched-rods. This incremental ad
symmetrically straddle the column, movable pawls at
justment means also provides means for removing pres
tached to this iirst frame and positioned to engage with
sure from the hydraulic or mechanically operating jack
the notched-rods and prevent downward movement of the
ing means.
frame, a second frame having an open central portion
and adapted to symmetrically straddle said column, with
The construction and arrangement, as well as use, of
30
the present improved lifting apparatus will be more ap
parent upon reference to the accompanying drawings and
this second frame having at least one suspended lifting
rod for attachment to a load, movable pawls attached to
the following description thereof.
,
this second frame and positioned to engage with said
FIGURE 1 of the drawing is an elevational view of the
notched-rods and prevent the downward movement of
lifting apparatus shown attached to a vertical column and
the frame, at least one pair of jacking means positioned 35 in use lifting a load.
between said first and second frames and operable to
lFIGURE 2 of the drawing is a side elevational view
periodically lift or move the second frame with respect
of the lifting apparatus as indicated byI the line 2_2 in
to the first frame while the latter remains temporarily
FIGURE 1.
engaged with the suspended notched-rods.
FIGURE 3 of the drawing is a partial elevational view
It is a feature of the present invention to provide means 40 of one corner of the lifting apparatus indicating a modi
for clamping the support for the notched-rods to a col
fied means for lifting one frame with respect to the other
umn at any position or height. 'I‘he clamping means
by automatic incremental elevational setting means.
may be made adaptable to hold on the side of any stand
FIGURE 4 of the drawing is a partial sectional plan
ard type of building column, whether it be a pipe column
view of a gear-driven means for effecting the vertical in
a structural I-beam type, or of reinforced concrete, or 45 cremental adjustment of the lifting apparatus, as indi
even of composite type. Thus, it is not necessary to posi
cated byline 4_4 in FIGURE 3 of the drawing.
tion or construct columns of a strength which will sup
FIGURE 5 shows, in a partial elevational view, a
port loads beyond the normal strength required. In ad
combination of the gear driven incremental adjustment
dition, the strength of the column can be reduced in the
means with the jacking and lifting arrangement of the
upper sections if so desired.
50 type shown in FIGURE l of the drawing.
The lifting apparatus may be used for various lifting
Referring now to FIGURES 1 and 2 of the drawing,
jobs as, for example, adjusting the height of a movable
it will be seen that there is a vertical column 1 suitably
platform or for use with the lifting of ships in a dry-dock.
supported from a suitable base or foundation 2. The
Still another advantageous use the apparatus may have
present column is indicated as a pipe column; however, as
is in connection with a building construction system which 55 previously noted, the column may well be constructed of
lifts whole lloor or roof assemblies. In this method of
concrete or of other structural members such as an
building, one or more reinforced concrete ñoors or other
H-beam or I-beam section or of built-up structural com
constructions and assemblies are poured and formed, orv
framed and assembled, at the ground level and are sub
posite sections. Along the side of column 1 is a bracket
sequently lifted into place around their spaced vertically
positioned supporting columns. The system is economical
31 which is preferably constructed to removably clamp
60 to the column 1 and have end sections 3 which are
adapted to clamp to and hold vertically suspended
in that it eliminates a lot of the expensive form-work
notched-rods 4. Pins or bolts 43, or the like, may be
and bracing, as well as expensive labor, which is neces
provided on the columns to be placed below the bracket
sary in reinforced concrete construction at the various
and help support it from the column. In some columns
floor levels, or in other constructions in the raising of in 65 it may be desirable to construct notches along the side
dividual prices, as against the whole. In other words,
thereof to accommodate the bracket means. In the
all floor slabs or other assemblies can be poured and/ or
present embodiment of the end sections 3, there are
constructed at the ground level with the use of only a
shown removable bolts through blocks 5 which effect
minimum amount of form work and equipment and with
reduced labor costs. By way of example, in a reinforced 70 the clamping of rods 4; however, other equivalent clamp
ing or blocking means may be utilized to effect the clamp
concrete construction, all of the building columns are
ing and holding of the suspended notched-rods 4. 'Ihe
set in place on their foundations prior to the lifting
3,028,143
3
latter are also indicated in the present embodiment as
having a multiplicity of tapered V-like sections which
form offsets and the notched construction to the rods. It
is not intended, however, to limit the invention or the
construction to any one type of rod inasmuch as the rod
sections may have a round cross-section with offsets or
notches being formed by a plurality of frusto-conical
sections. Also, the rod may be square rather than rec
tangular or, alternatively, may be constructed of cable
with suitable attached washers or key pieces which pro
vide offsets or ledges, or the like, equivalent to notches.
The notched-rods 4 are placed symmetrically with re
spect to the column 1 and are adapted to hold the upper
and lower frames A and B which, in turn, comprise a
portion of the lifting apparatus. The upper frame A is
indicated as being constructed of pairs of spaced chan
4
Movable keys or pawls 2.1, similar -to those in connec
tion with frame A, are provided between each of the
pairs of channels 17 of the lower frame B. Each pawl
has a slot 22 adapted to move laterally on pins 23 which
extend through channels 17; also, guide members 24 and
springs 25 provide for insuring Contact between the pawls
and the vertical notched-rods 4 as movement is effected
along the height of the notched-rods. There is also pro
vided between frames A and B, at the substantial `corners
10 thereof, suitable rods or bolts 26 each having a spring
27 which bears against the ends of channel 6 of the up
per frame A. The bolts vand springs provide guide and
’stabilizing means between the two frames as well as
means for maintaining tension between the upper and
lower frames.
In operation as a lifting apparatus, with lower frame
spaced and held in position'laterally by means of addi
B haying pawls 21 engaged with notches of rods 4, the
operationl of jack means 20 will effect the raising of
tional pairs of_channels indicated as 7 and upper `and
lower plates 8 and 9. The upper pairs of spacing and
connecting channels 7 are, in turn, utilized to support lift
ment of the- frame A around the column 1 and the
notched-rods 4. The pawls 12 of the upper frame A
nels 6 which, inturn, lstraddle the column 1 and are
ing rods 10. In'the present embodiment, four lifting
rods 10 are utilized and are spaced symmetrically about
frame A with respect to frame B and the upward move
`lift upwardly and away from the notch sliding vertically
upwardly> along the rods until they come to rest over
thevtop of a nextV higher notch on rod 4. As the pawls
column 1 and through frames A and B to suspend down
wardly and holdwhatever desired load may be attached 25, 12 on frame A come to rest over a next higher notch,
the jacking operation can be stopped and the jacks them
for lifting. The present drawingl shows a plurality of
Y selves retracted such that therel is thus effected a raising
slab-like sections 111 being held in place and lifted by the
of the lower frame B, with frame A remaining stationary,
rods, 1l). Suitable nuts and washers are placed at the
' as the pawls 21 ofthe lower frame slide upwardly along
end of lifting rods 10 to effect the holding of the top end
of the bar and rods 1f) and to clamp under the slabs 11. 80 a -notch on each of the rods 4 until they pass overa next
higher notch, at which time the retraction of the opera
In a preferred form of the apparatus, the rods 10 can be
relativelyshort, so 4that the load is just below the lower
frame Vof the apparatus. In the lifting of floor slabs,
>having the apparatus 'down low or close to the load is
very` advantageous, where the rods have some length
between frame'B and the load then they shall be suf
ficiently stiff so as to provide “strut action” whereby they,
in turn, can effect compression against the upper frame A
and a resulting stabilization thereof. By “strut action”
is meant an unsupported length which is not too great
with respect to the moment of inertia or radius of gyra
tion of the member, so as to have a slenderness ratio
tion` of «the jacks is ceased and the frame B is permitted
to again bear its load on rods 4.
In this manner, the
lifting apparatus is incrementally moved upwardly `along
the notched-rods 4 effecting the constant periodic lifting
of the slabs or loads V11 by virtue of the incremental up
ward movement of lifting rods 10 that are suspended
from the upper frame A 'of the apparatus.
Referring now to FIGURE 3 of the drawing, there is
shown a modified or optional construction of a' portion
of the lifting apparatus, which construction provides
means for effecting, other than by jacks, incremental
of sufficient stiffness to preclude it being easily bent or
movement of one frame with respect to the other. Pref
nels 6. Suitable guide bars 15 provide supports and
rests for the pawls 12 whereby they may move hori
adapted to turn. Each extends upwardlythrough frame
A’ and has, at the top of the latter, a spring 32 which
bears against the top of frame A' `and is held in place
by ya suitable washer 33 and nut 134. Thus, by eûecting
erably, manual or hydraulic jacks are still provided be
buckled.
tween the upper and lower frames, which, in the present
Between the channels of each pair of channels 6, where
FIGURE, are indicated as upper frame A' and lower
the latter straddle the notched-rods 4, there are provided
frame B’; however, in addition-there are provided
movable and slidable pawls 12 which are adapted to
threaded rods or bolts 30, one being at each corner of
engage'with and fit onto the top of each offset or notch
frames A’ and B', substantially in the position of the
of the rods 4. Various types of movable pins or pawls
may be utilized to effect the desired engagement with the 50 bolts 26 shown in FIGURES l and 2 of the drawing.
Each rod or bolt 30 has operating in connection there
notched-rod members and it is not intended to limit the
with a large threaded adjustment nut 31 adapted to ride
construction of the apparatus to any one type of pawl
up and down thereon and bear against the underside of
or movable key. The present construction indicates
frame A’ on plate 41. At each position, the'threaded rod
slots 13 in the pawls 12 which, in turn, are adapted to
slide laterally on pins 14 extending through the chan 55 30 is ñxedly attached to the lower frame B’ and is not
zontally in and out of the notches as they bear against the
V-like sections of the notched-rods. ASprings 16 are pro
vided to abut against the outer ends of the pawls 12 to 60 the turning of threaded adjustment nut 31 on threaded
rod 30 at each of the corners of the frames, there can be
maintain the latter in constant contact with the notched
effected either an upward or a downward movement of
rods during movement of the frame A.
frame A’ with respect to frame B', depending, of course,
The lower frame B is constructed somewhat similarly
upon which way «the nuts 3_1 are turned. There may
to frame A having pairs of spaced channel members 17
straddling lthe column 1 and suitable cross channels 18 65 thus be affected minute incremental adjustment means be
tween the upper and lower frames without depending
which connect and space the former channels 17 to, in
upon the stoppage of the movement of the jack means at
turn, provide a rigid box-like frame. Plates 19 are also
any'particular elevation. In a preferable construction
utilized across the channels 17 to provide framing means
and operation, automatic motorized means are provided
as well as base-plates for jacks 20. In the present em
bodiment, four jacks ‘20 are positioned between plates 70 for affecting the turning of the large nuts 31 and the re
19 on the lower frame B and plates S on the upper frame
A, symmetrically with respect to column 1 aswell as the
frames, such that one frame may be moved with respect
to the other. The invention is not limited to the use of
sulting incremental vertical adjustments. As may be seen
in connection with FÍGURE 4 of the drawing, as well
as FIGURE 3, there may be provided a pulley or gear
supporting v“member 35, which extends from the lower
four jacks however, since any number may be utilized. 75 end of each threaded rod 30, and an upward shaft or pin
8,028,143
6
36 adapted to hold a sprocket gear 37 and a spur gear 42.
able rod supporting bracket having means for being re
movably clamped to said column, means holding at
least one pair of detachable vertically suspended notched
rods from said supporting bracket in an opposing sym
metrical arrangement with respect to said column, a
lower frame having an open central portion and adapted
In this construction and arrangement, the nut 31 is pro
vided with a plurality of teeth around the periphery
which, in turn, ñt with `and engage with lthe plurality of
teeth on the spur gear 42. A chain belt 38 is provided
to encompass the lifting apparatus extending around
sprocket gears 37 at each corner thereof to, in turn, pro
vide a driving means for each sprocket gear 37 and, in
turn, effect the movement of spur gears 42 and the
to symmetrically straddie said column, movable pawls
attached to said lower frame and positioned to engage
with said notched-rods and prevent downward movement
threaded nuts 311. A suitably placed driving means, 10 of said frame, an upper frame spaced above said lower
such as a shaft and sprocket gear 39, from a reversible
frame having an open central portion adapted to sym
motor 49, shown in FIGURE 4, can affect the movement
metrically straddle said column, said upper frame having
of Ithe chain-drive belt 38. Suitable electrical switching
at least one suspended lifting rod for attachment to a
means (not shown) may, of course, connect With the
load, movable pawls attached to said upper frame posi
reversible motor 40 to affect the movement and direction 15 tioned to engage with said notched-rods and prevent
of the motor so that at any desired time there may be
downward movement of said frame, at least one pair of
affected the desired upward or downward movement of
jack means positioned between said lower and upper
the frame A’ with respect to frame B’.
frames operable to periodically lift the upper frame with
Referring now to FIGURE 5 of the drawing, there
respect to the lower frame while the latter remains tem
is shown frames A’ and B’ with a threaded rod 30 and a 20 porarily engaged with said suspended notched-rods, a
threaded nut 31 therebetween, in the arrangement of
FIGURES 3 and 4, together with jacking means 20',
sliding pawls 12’ and 21', lifting rods 10', a notched rod
4', and a column 1', etc., in accordance with the con
struction and arrangement of FIGURE 1. Thus, FIG 25
URE 5 shows, for purposes of clarity, the lifting ap
paratus arrangement of FIGURE 1 in combination wtih
the gear-driven incremental movement and adjustment
means of FIGURES 3 and 4.
A suitable motor sup
plurality of symmetrically spaced threaded rods attached
to and extending vertically upwardly from said lower
frame through said upper frame, threaded adjustment
nuts on each of said threaded rods between said frames
adaptable to travel up and down said threaded rods,
bearing plate means on the underside of said upper frame
at the Zone of each _of said threaded rods providing a
bearing surface for the upper ends of each of the threaded
adjustment nuts whereby the turning of s-aid adjustment
provides for the incremental raising and lowering of
porting bracket 44 may be extended from one of the 30 nuts
exterior horizontal cross channels 18’ to hold an electric
said
motor, such as the reversible motor 40 shown in FIG
2.
URE 4, to effect the driving of chain ‘38, spur gear 42
that
and the nut 31.
fore
I-t is, however, not intended to limit the present inven
upper frame with respect to said lower frame.
The apparatus of claim 1 further characterized in
a sprocket gear and shaft supporting means there
is provided alongside of each of said threaded rods
35 attached to said lower frame and a sprocket gear is
tion to any one special means for effecting a minute ad
justment or incremental movement of one frame with
respect to the other, for other leverage means, such as
mounetd on each of said shafts, said adjustment nuts
on said threaded rods have external peripheral teeth
adapted to mesh with the teeth of said sprocket gears,
laterally moving wedges, or other geared mechanism
and chain drive means passing around and encompassing
may be utilized in lieu of the threaded rod, gear and 40 each of said sprocket gears provide means for turning the
chain-belt drive which is shown in the present drawings.
In connection with any modification of the present
lifting apparatus, there is no limit to the height of the
columns lto which the apparatus may be attached inas
much as each column may be installed and guyed in posi 45
tion for its full height, or a column may be merely
erected to height sufficient to accommodate the apparatus
for a portion of the construction work and then addi
tional sections of the columns added to existing sec
tions thereof as the need arises for replacing and re 5 C)
clamping the apparatus to the columns at higher levels.
latter and said adjustment nuts' responsive to driving
means connecting with said chain drive.
References Cited in the file of this patent
UNITED STATES PATENTS
919,559
1,063,156
2,540,679
2,686,420
I claim as my invention:
l. Apparatus for lifting heavy loads, which comprises
in combination, a substantially vertical column, a mov
Dulî _______________ __ Apr. 27,
Cohen et al. _________ __ May 27,
Laffaille ______________ _- Feb. 6,
Youtz _______________ -„ Aug. 17,
1909
1913
19‘51
1954
FOREIGN PATENTS
761,118
Great Britain ________ __ Nov. 7, 1956
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