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Патент USA US2128778

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Aug. 30, 1938.
- Filed June 9, 1957
s Sheets-Sheet "1
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Ahg. 30, 1938.
‘ ‘
Filed June 9, 1937 '
‘s Sheets—$heet 2
Char/es SQ/oh son '
Aug» 30,. 1938-
I c. s. JOHNSON ,
Filed June 9, 1957
5 Sheets-Sheet 5
Chm/es S (‘fa/71750)’!
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Patented Aug. 30, 1938
'r'r oFFieE
Charles- s. Johnson, Champaign, 111.
Application June 9,1937, Serial No. 147,172
5 Claims. (Cl. 212-81)
Fig. 7 is a side elevation of the attachment
The invention relates to material handling ap
paratus and more particularly to such apparatus
for hoisting and traversing quantities of such
loose bulk materials as are, for example, used in
51 building or road construction and the like.
The general object of the invention is to pro
vide an improved form of material handling ap
paratus which is of such character that a single
_ set of tackles may be readily used for different
10 services such as moving and operating any one
of a series of selectively available containers such
as clamshell buckets, tank buckets, and the like,
all without the necessity of unreeving the tackles
or making other complicated and time-consum
ing adjustments.
A more speci?c object of the invention is to
provide an improved form of demountable at
tachment head for detachably securing material
handling buckets or containers to associated
2 O operating and hoisting tackles.
Another object of the invention is to provide
in an apparatus of the type set forth a detach
able connection between the container and asso
ciated tackles in which no removable pins or
separate parts are used, thus obviating the pos
sibility of their being misplaced or lost.
The invention also resides in the novel form
of locking mechanism embodied in the demount
able attachment head.
Further objects and advantages of the inven
tion will become apparent as the following de
' scription proceeds and the features of novelty
which characterize the invention are pointed out
with particularity in the claims annexed to and
head‘applied to a tank-type bucket for cement
or the like.
For purposes of illustration and explanation
of its various features, the invention has been
shown herein as embodied in a material handling
apparatus which may be used for conveying bulk
construction materials of various types such, for
example, as sand, gravel, and crushed rock. This
apparatus includes as its principal elements a
material container illustrated as a clamshell
bucket it, a lowering and hoisting tackle H, a
container operating and hoisting tacle i2, and a
novel form of attachment head M for detachably
connecting the bucket It to the associated tackle ‘
The clamshell bucket i0 is of conventional
form and includes a pair of scoop-shaped shells
i5 pivotally connected by a shaft l6 passing
through a counterweight and pivot casting H.
The outer ends of the shells l5 are supported
for opening and closing movement by rigid arms
I8 pivoted at their lower ends on the outer por
tions of the shells as indicated at I!) and at their
upper ends on the attachment head it as indi
cated at 2!]. It will be understood that a dig
ging-type tackle-operated clamshell bucket or
other form of material grasping container may
be utilized if desired.
The associated cable rigging for the bucket Ii]
has been illustrated as of the well known “four
line” type although other cable arrangements such
as a “two-line” type may be substituted if de
sired. In the rigging illustrated, the bucket it
may be held or lowered in open position by the
35 forming a part of this speci?cation.
For a better understanding of the invention, tackle M including a hoist-and-lower-open cable
2i, as well as closed and hoisted in closed position
reference may be had to the accompanying draw
by the tackle 52 including a close-and-hoist
ings in which—‘
Figure l is an end elevation of a material ' closed cable 22. These cables 2! and 22 extend
downwardly from suitable pulleys ‘23 on a trolley
40 handling apparatus embodying the invention.
Fig. 2 is a side elevation of the apparatus 2t, which may be mounted for traversing move
shown in Fig. l but with the trolley mechanism ment on a horizontal I-beam track 25. One end
2ia of the cable M is anchored while the other
omitted and the bucket in open position.
end passes over a suitable power‘ actuated cable
Fig. 3 is an enlarged side‘ elevation of the at‘
45 tachment head and associated tackle pulleys drum (not shown), the bight of the cable being
reeved through a block or pulley 26 fast on. the
with a portion of the head brokenaway to illus
head M. Similarly, one end 2284 of the cable 22
trate its interior construction.
Fig. 4vis an enlarged detail sectional view along
the line 4—4 in Fig. 3.
Fig. 5 is an exploded perspective view of the
attachment head and its associated parts.
Fig. .6 is a detail plan view of the attachment
head included in the apparatus shown in Figs.
1 and 2, certain of the parts being sectioned along
55 the line 6-6 in Fig. 1.
is anchored while the other end passes over a
second power actuated cable drum (not shown)
and the bight of this cable is reeved through
blocks or pulleys 2'3 and 28 fast respectively on
the head Ml and bucket it]. It will be noted that
the lower pulley 28 is detachably secured to the
bucket casting ll by a demountable connection
designated generally by the numeral 29.
2. .
In lowering the bucket 18 in open position, the
cable 22 is slacked off to permit the bucket shells
to open by gravital downward movement of the
heavy pivot casting or counterweight H and the
bucket is then lowered by unreeling the cable 2i.
Having been thus lowered in open position on the
ting lugs 38--4€l when the bucket 18 is hoisted in
close and scoop up'a load of the material by
loaded condition is'obviated by the direct connec
reeling in the cable 22, thereby raising the block
tion between the head-section 32 and pulley 21.
28 until it approaches the associated upper block
21 whereupon further reeling in of the cable 22
will cause the loaded bucket to be hoisted. The
trolley 24 and its associated mechanism may be
traversed along the track 25 by suitable travers
Thus, the strain on the tackle l2 does not have 10
is that had with ordinary four-line clamshell
buckets and consequently, it is not believed to
require further detail.
In order to facilitate ready detachment of the
bucket I0 from the associated tackle rigging, the
head I4 is constructed in two separable head
sections 32 and 33 which are demountable and
angle of, say,rninety degrees, the lugs 40 are
moved out of engagement with the grooves 38 so
that’the head~sections may be moved outvof en Cl
gagement (Fig. 5). Undue strain on the inter?t
top of a pile of material, the bucket is caused to
ing cables 38 and 3| or otherwise moved or han
dled as desired. The operation so far described
the other hand, when the head-sections 32 and 33
are rotated with respect to each other through an
may be detachably locked together as'a unitary
structure. All of the tackleconnections to the
head are made to one‘head-s'ection and all of the
container connections to the head are made to
the other head-section. It will thus be seen that
in general the tackle rigging may be disconnected
30. as a unit from the bucket by simply detaching
the two head-sections 32 and 33 and connection
23, thus obviating the necessity of unreeving the
In the preferred construction illustrated, the
3.5. head-section 32 is generally cylindrical in shape
~ While the associated head-section 33 is annular
and fits about the ?rst section in telescoping re
lation. Each of the head-sections is preferably
made in the form of a heavy metal casting. An
40 upper end wall 34 of the cylindrical head-section
'1 32 forms a support to which the pulley or block
28 is rigidly secured (Figs. 3 and 6). This end
Wall 34 also supports a pair of roller-type guides
35 for the cable 22. In addition, the head-section '
45 32 constitutes a protective housing and support
for the upper pulley 27 of the container operating
to be borne by the lugs 38-48 but is transmitted
directly to the upper head-section 32 rather than
through the lower head-section 33 to the upper
Locking of the head-sections in assembled re 15
lation to prevent a disengaging movement thereof
is effected by a pair of manually operable bell
crank levers 42 pivoted on laterally projecting
ears 43 on the head-section 32. When inrtheir
lowered position (Fig. 3), the lower ends 43 of 20
these bell crank levers 42 enter slots 38a. in the
lugs'38 preventing rotation ofthe lower head
section 33 with respect to the head-section 32.
The demountable connection 29 between the
tackle pulley 28 and bucket counterweight ll
includes a plurality of inter?tting projections
which maybe releasably‘locked in engaged po
sition. Thus, upon reference to Figs. 3 and 4,
it will be seen‘that a pair of laterally extending
segmental shaped ears $4 on bracket 45 of pulley
23 ?t within a complemental annular recess 46
in the top of the casting ll. Segmental projec
tions 41 on the casting ll overlie a portion of
the top of the recess 46 so that when the ears 44
are disposed beneath these projections (as shown 35
in Fig. 4), the parts are locked in engagement,
but they may be readily separated upon rotating»
the cars 44 into registry with the openings be
tween the projections 41. A spring pressed latch
48 carried by the pulley bracket’ 45 enters a regis 40
tering hole in the casting 17 when the ears 44
and projections 47 are in engagement thereby
releasably preventing "relative rotation ‘between
the interlocking parts.
In the construction illustrated, the separable
elements of the attachment head l4, as well as of
tackle, this pulley being journaled within the
the demountable pulley connection 29 are re
hollow head-section on a shaft 36. 'The annular
leasably secured together by devices which in
clude only cooperating parts which arérperma
nently secured to their respective’ associated‘ele 50
outer head-section 33'is provided with a central
50 opening 3? of ample diameter to permit the pulley
28 to pass‘freely therethrough when the head
sections are disconnected. A pivotal support for
the upper ends of the bucket arms i8 is formed
by laterally projecting trunnions 25 positioned on
55 the sides of this head-section 33.
' A rugged, strong, and easily manipulable con
nection between the head-sectionsr32. and 33 is
formed by suitable inter?tting projections there
on which are adapted to be moved into and out
60 of engagement by a relative rotational movement
of the head-sections’ (Fig. 3).
Thus, heavy up
standing bifurcated lugs or projections 38 are
formed on the annular head-section 33 at dia
metrically opposed points thereon, these projec
Thus, no separate slip-pins, ' bolts, ‘or
the like are included.’ Such ankarrangement in
which none of the attachment parts can be iso
lated from the main elements is particularly ad
vantageous as-it prevents vexatious delays due
to ‘losing or'misplacing such partsa '
bucket 10, in order to substitute anothentype of
container or for any other reason, this operation 60
may be quickly and easily performed without the
necessity of changing the reeving of the asso
ciated tackle rigging. Thus, thepulley 28 is de
tached fromkthe bucket, and the head~sections
65 tions presenting grooves or notches 39 ontheir ' 32Hand 33 are disengaged.
inner faces which are adapted to receive comple»
mental projections on the inner head-section 32.
These latter projections on therhead-section 32
are illustrated in the form of lugs 43 on an annu
70 lar integral collar 4| extending about the lower
end of the inner head-section, Upon reference
to Fig. 5, it will be seen that the axial width of
the collar 4| is increased at the points at which
the lugs 40 are formed so that the latter ?t snugly
, within the grooves 39. when aligned therewith. _On.
‘In. the operation of the apparatus described
above, if it is desired to detach the clamshell
Detachment of the 65
pulley 28 is e?ected by releasing the latch 48 and
then rotating the pulley 28 relative to the, bucket
through an arc of approximately ninety degrees
to disengage the ears 44 from the projections 41.
The operator may then disconnect the head-sec
tions by grasping the bell crank levers 42 and.
swinging them upwardly to disengage their lower
ends from the bifurcated lugs 38 and subsequent-I
'ly twisting the head-section 32 by means of the
lever handles to rotate the lugs 48 out of engage
ment with the grooves 39.
The detaching opera
sembled relation as a unitary structure.
2. In a material handling system, a demount
associated apparatus and at the same time, the
construction is such as to preclude accidental
disengagement of the parts in the course of oper
able material container attachment head com
prising, generally annular head-sections arranged
tion. Moreover, as was previously noted, the
possibility of loss of any of the attachment parts
is also precluded.
detachably maintaining said head-sections in as
tion is thus quickly and easily performed without
material alterations in the arrangement of the
in telescoping relation, and means. including pro
‘jections on one of said head-sections adapted to
be moved into and out of complemental grooves
on the other of said head-sections upon relative
rotation thereof for detachably maintainingsaid 10
In the event that it is desired to utilize a differ
ent container of the same or a different type, it
head-sections in assembled relation as a unitary
may be'readily attached to the same tackle mech
anism. For example, it may be desired to utilize
the tackle mechanism for'purely hoisting- pur
3. In a material handling system, a demount
able material container attachment head com
15 poses as distinguished from operating a material
grasping container such as that described above.
Thus, in Fig. 7, a cylindrical metal bucket 49 has
been illustrated such as is used for conveying
quantities of .cement and the like. This bucket
is provided with an attachment head-section 33ab
which is substantially identical in construction
prising, generally annular head-sectionsarranged
in telescoping relation, means including projec
tions on one of said head-sections adapted to be
moved into and out of complemental grooves
formed in bifurcated spaced projections on the
other of said head-sections upon relative rota 20
tion thereof for detachably maintaining said
with the head-section 33 described above except head-sections in assembled relation as a unitary
that it is provided with laterally extending arms structure, and means including levers pivoted on
50 rather than trunnions 20. The bucket 49 is ' said head-section movable into and out of the
from these arms 50 by suitable ?exible openings in said bifurcated projections for lock 25
cables 5|. It will be seen that the head-section ing said head-sections against relative rotation,
32 may be inserted within the head-section 33a said levers being provided with manual operating
and then rotated and locked in position therein handles operable to move the same into and out
by the bell crank levers 42 as heretofore described. of locking position and to rotate said one head
30 When using a container such as the bucket 49,
the block 28 is hoisted to the elevated position in
dicated in Fig. 6 where it will not interfere with shell bucket including a pair of shells pivotally
the bucket. It will be understood that a large
variety of other types of containers may be util
35 ized, these containers being provided with suit
able attachment head-sections for cooperation
with the head~section 32.
Although a particular embodiment of the in
connected to a central counterweight, an associ
ated operating tackle including a vertically mov
able pulley, means including inter?tting projec
tions on said counterweight and pulley for de
tachably connecting the same in operative rela
tion, and means for releasably locking said pro
vention has been shown and described in some ,
jections against disengagement.
detail for purposes of illustration, there is no in
tention to thereby limit the invention to such
embodiment but, on the other hand, the appended
5. In a material handling apparatus, a clam
shell bucket. including a pair of shells. pivotally
claims are intended to cover all modi?cations
within the spirit and scope of the invention.
I claim as my invention:
1. In a material handling system, a demount
able material container attachment head com-'
prising, generally annular head-sections arranged
in telescoping relation,_ and means including an
50 annular integral collar on one of said head-sec
connected to a central counterweight, as associ
ated operating tackle including a vertically mov
able pulley, means including inter?tting projec
tions on said counterweight and pulley movable 45
rotatively into and out of engagement for de
tachably connecting the same in operative rela
tion, means for releasably locking said projec
tions against inadvertent relative rotation, an at
tachment head having an aperture therein ac
tions having laterally extending portions adapted
commodating said pulley for vertical movement
to be moved into and out of complemental grooves
disposed at spaced points on the other of said
therethrough and means for operatively connect
ing said shell and said head.
head-sections upon relative rotation thereof for
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