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Патент USA US3055702

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Sept. 25, 1962
o. c. HUFF ETAL
3,055,695 ,
CRADLE FOR HANDLING CYLINDRICAL OBJECTS
Filed July 11, 1958
2 Sheets-Sheet l
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Sept. 25, 1962
o. c. HUFF ETAL
3,055,695
CRADLE FOR HANDLING CYLINDRICAL OBJECTS
Filed July 11, 1958
2 Sheets-Sheet 2
nited States Patent O??ce
1
3,055,695
CRADLE FOR HANDLING CYLINDRICAL
OBJECTS
O. C. Huff and Norman C. Stanley, Port Arthur, Tex.,
assignors to Texaco Inc, a corporation of Delaware
Filed July 11, 1958, Ser. No. 747,921
2 Claims. (Cl. 294—-67)
3,055,595
Patented Sept. 25, 1962
2
that when the pins are passed through mating bores in the
sleeve and in the brace, the legs are then ?xed in position.
When a change in position is desired, one or both of the
pins are withdrawn, the legs 21 and 23 are moved as de
sired, and then the pins are reinserted. To prevent bind
ing of the brace 41 within the sleeves 43 and 45, the latter
are secured to the legs by bolts 53 and 55 which permit
pivoting movement of the sleeves in an upright plane as
the legs 21 and 23 are moved and the brace slides Within
dling large heavy cylindrical objects, such as heat ex 10 the sleeves.
changer tube bundles used in chemical plants. Such tube
To prevent the legs 21 and 23 from spreading too far
bundles often are very large, ranging in length up to 24
apart when the cradle is positioned on the ground with the
feet and in ‘diameter up to 8 feet, and may weigh several
brace 41 unsecured there are provided stops 57 and 59 in
tons.
the form of U~shaped yokes which are welded to the sides
In accordance with the present invention there is pro 15 of the clevis 19 and extend in opposite directions laterally
therefrom.
vided a novel cradle comprising a horizontal longitudinal
The present invention relates to a novel cradle for han
beam, two pairs of legs pivotally mounted on and depend
The construction and arrangement of the pair of legs
ent from opposite ends of the beam, and a pair of longi
at the opposite end of the beam 11 is identical in every
tudinal struts extending parallel to the beam between cor
respect. One of these legs 61 is shown at the right side of
responding legs adjacent their lower ends. The appara 20 FIG. 3 mounted in a clevis 63 and carrying a pivoted
tus also has two transverse horizontal braces tying together
sleeve 65 within which is secured a brace 67 like the brace
the two legs of each pair in a ?xed relationship, in the
41. On its lower end the leg 61 carries a wheel 69 which
form of an A. When this cradle is dropped over a tube
is mounted on the end of shaft 39 opposite wheel 33.
bundle by a crane the legs are tied together with the longi
For gripping a cylindrical object such as a tube bundle
tudinal struts below and closer together than the horizon 25 the shaft 39 carries a strut such as a roller or pipe 71
tal diameter of the bundle. The crane then lifts the cradle,
which is rotatable with the shaft and extends for most of
the struts engage the bundle below its horizontal diam
the distance between the legs 23 and 61. A similar strut
eter, and the tube bundle is carried away.
73 is mounted on shaft 37 which extends longitudinally
The novel cradle is described more in detail below with
between the other leg 21 and the corresponding leg (not
reference to the accompanying drawings, wherein;
30 shown) at the opposite end of beam 11.
FIG. 1 is an end elevational view of a cradle embody
FIGS. 4, 5 and 6 demonstrate how the cradle is used
for moving a cylindrical object such as a heat exchanger
ing the invention;
FIG. 2 is a cross sectional view taken along the line
tube bundle. For the device to function properly, the legs
2—~2 in FIG. 1;
at the opposite ends of beam 11 should be spaced apart a
FIG. 3 is a side elevational view of the cradle as viewed 35 distance greater than the length of the tube bundle to be
from the right in FIG. 1, parts being broken away and
moved. One or both of the pins 49 and 51 and the corre
shown in section;
sponding ones at the opposite end of the cradle are re
FIG. 4 is an end elevational view corresponding to
moved. Assuming that a bundle 77 is resting in blocks
FIG. 1, but showing the cradle in position for lifting a
79 on the ground, a crane lifts the cradle above the top
40 of the tube bundle and then lowers it down over the bundle
tube bundle;
until the struts 71 and 73 abut against the periphery of
the tube sheets 81}, 81, 83 and 85. Upon continued lower
a crane; and
ing of the cradle the struts 71 and 73 roll down along
the periphery of the tube sheets and the legs gradually
FIG. 6 is a side elevational view on a reduced scale as
viewed from the right in FIG. 5.
45 spread apart while the braces 41 and 67 slide within their
retaining sleeves until the horizontal diameter of the
The cradle comprises a horizontal beam 11, such as an
bundle is reached. Upon continued lowering, the weight
I-beam, having longitudinally spaced ears 13, 15 and 17
of the legs is such that they start to close together, and
for attachment to the cables of a crane. Referring to FIG.
when the lower ends of the legs reach a desired position
1, and to the left end of FIG. 3, a clevis 19 is welded or
below this horizontal diameter the pins are inserted to
otherwise secured to the end of beam 11 for supporting a
hold the braces 41 and 67 in an adjusted position and
pair of downwardly extending legs 21 and 23 having their
retain the legs in a ?xed position relative to one another.
upper ends located within the space between the two side
As shown in FIGS. 5 and 6, the crane 87 then lifts
plates 25 and 27 of the clevis, and pivotally secured there
the cradle and the tube bundle 77. When the bundle is
to for movement in an upright vertical plane toward and
FIG. 5 is an end elevational view corresponding to FIG.
4 showing a tube bundle in the process of being lifted by
away from one another by horizontal bolts 29 and 31 ex
tending through corresponding bores in the sides and in
the legs.
At their lower ends the legs 21 and 23 carry rollers or
wheels 33 and 35 which are mounted on shafts 37 and 39
for rotation therewith so that when the wheels 33 and 35
55 to be released, it is deposited on a suitable support, one
or both of the retaining pins of each leg structure are
removed, and the crane lifts the cradle while the struts
71 and 73 roll upwardly on the periphery of the tube
bundle and the legs expand and contract below and
above the horizontal diameter.
60
are resting on the ground the relation of the legs 21 and
Obviously, many modi?cations and variations of the
23 to one another can be changed by raising or lowering
invention, as hereinbefore set forth, may be made with
the beam 11 with a crane while the wheels roll along the
out departing from the spirit and scope thereof, and
ground toward or away from one another. Shafts 37 and
therefore only such limitations should be imposed as are
39 extend lengthwise through apertures in the correspond
65 indicated in the appended claims.
ing legs of the two pairs.
We claim:
For securing the legs 21 and 23 in a ?xed position a
1. In a cradle for handling cylindrical objects such as
horizontal transverse brace 41 is mounted within a pair
heat exchanger tube bundles comprising, in combination,
of sleeves 4-3 and 45 on the legs 21 and 23, respectively.
a horizontal beam;
The brace 41 has a plurality of vertical bores 47 there
a ?rst pair of legs pivotally mounted on said beam
through spaced apart lengthwise, and the sleeves 43 and 45 70
adjacent one end thereof for movement toward and
have corresponding bores containing pins 49 and 51 so
away from one another in an upright plane;
3,055,695
a
.
a second pair of legs pivotally mounted on said beam
adjacent the opposite end thereof for movement
4
a substantial distance during movement of said legs
toward and away from one another,
toward and away from one another in an upright
and means for securing said braces in position within
plane;
said sleeves.
a pair of transversely spaced struts extending parallel 5
2. In a cradle in accordance with claim 1, the further
to said beam and connecting together the lower ends
improvement which comprises roller means carried by
of corresponding legs of said pairs;
each of said legs for contact with the ground during move
and means connecting together the legs of each pair at
ment of said cradle along the ground.
points spaced below said beam for holding the legs
of each of said pairs in a ?xed position relative to
References Cited in the ?le of this patent
one another; the improvements which comprise:
UNITED STATES PATENTS
(a) each of said struts being permanently connected
1,178,829
tone ______________ __ Apr. 11, 1916
at the ends thereof to said legs whereby said cradle
1,301,728
Milne ______________ __ Apr. 22, 1919
can only be positioned by lowering it down over a
cylindrical object; and 1
15
(b) said last named means comprising a pair of braces
extending horizontally between the legs of each of
said ?rst and second pairs of legs, each brace being
1,536,643
1,683,463
1,807,266
1,990,670
Williams _____________ __ May 5,
Healy ______________ __ Sept. 4,
Wazlavek ___________ __ May 26,
Shaughnessy ________ __ Feb. 12,
1,101,948
385,614
620,025
France _____________ __ Apr. 27, 1955
Germany ___________ __ Dec. 11, 1923
Germany ____________ __ Oct. 11, 1935
pivotally secured at one end thereof to a ?rst leg of
said pair for movement in an upright plane,
20
sleeves pivotally secured to the second leg of each pair
for movement in an upright plane, said braces ?tting
within said sleeves and being movable therein for
1925
1928
1931
1935
FOREIGN PATENTS
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