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Патент USA US2110566

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March 8, 193%,
P. J. M. 'r. ALLARD
Filed April 16, 1936
4 Sheets-Sheet l .
Féerre jean Harm-‘Maude re ALLAED
k ATT'Y.
March 8, 1938.
2,110,566 ‘
Filed April 16, 1936
4 Sheets-Sheet 2
- March 8, 1938.
P. .1. M. T. ALLARD
Filed April 16, 1936
4 Sheets-Sheet 5
65“ ‘evil; ATTRI
March 8, 1938.
Filed April 16, 1936
?g.” .
4 Sheets-Shqet 4
P-‘evr re Tenn Marie Tnéodore ALLAKD
| N v E N-ro a
Patented Mar. 8, 1938
Pierre Jean Marie Theodore Allard, Sainte
Adresse, France, assignor to Societe Fran
caise do Construction do Bennes Automatiques,
Le Havre-Graville, France,
a French com
Application April 16, 1936, Serial No. 74,685
In France May 6, 1935
10 Claims.
The present invention has for its object a new
apparatus adapted to actuate single-rope grabs
of the automatic type, the emptying of which is
effected by means of a crown or like element.
This apparatus is chiefly characterized in that
with the operation, the displacement of the load
being effected automatically as soon as the grab
principal vertical plane of the derrick or similar
cable is slackened.
two sides of the operating chain or cable of the
grab) in such a manner as to permit of emptying
the grab at a su?lcient distance from the spot
where it is loaded.
The construction of apparatus in current use'
is simpli?ed due to the elimination of the direct 10
ing device, permitting thus of realizing a light
but stable apparatus and which in the mean time
may be readily transported.
The operation is simpli?ed a?ording rapid
In the annexed ‘drawings, given solely as ex
Fig. 1 is a diagrammatical elevational view of
a device with a grab combined according to the
invention with an apparatus adapted to ensure 20
the movement of the load in the principal plane
of the device;
Fig. 2 is a corresponding plan View at a some
it remains suspended from the operating cable
Figs. 4 and 5 are fragmentary side and plan
of the lifting apparatus. This permits of plac
ing the grab according to a determined vertical
line in order to assure its ?lling and of emptying
it on another vertical line situated at a certain
distance from the ?rst one, this movement being
automatic and affording no other operations of
the driver as the usual ones required by the lift
is hooked to the opening crown and the operating
The apparatus is moreover arranged to permit
the movement of the grab in the aforesaid prin
cipal plane to be assured automatically by the
weight of this grab.
This movement of the grab is possible due to
the fact that the opening of a single-rope grab
can be e?ected by suspending it from a suitable.
device (opening crown, ring, headed piece, forked
member, hook, pawl, etc.) during all the time it
is being held open, whereas during the lifting of
22,5 the closed grab and the lowering of the‘ open grab
grab-content at a su?icient distance from the
spot where it is ?lled, for example from the well
ori?ce in order to afford a rapid evacuation of
the disaggregated materials without interfering
it comprises movable and controlled members
providing for the movement of the grab in the
operating device, (1. e., in the plane which is
perpendicular to the parallel axes of the pulleys
and of the lifting drum, and which contains the
. .15.
(Cl. 212-81)
ing and lowering of the grab.
This apparatus may be employed each time
where the rotary movement of the controlling ap
paratus bringing the grab into a determined di
rection may be omitted. The new lifting method
:40 simpli?es the work, accelerates the operations,
and simpli?es and reduces the weight of the con
trolling apparatus itself. This happens for in
stance in the case when boring or sinking wells,
trenches etc.
The invention also contemplates the derricks
and other engines for any kind of use and espe
cially for the boring or cleaning of wells or
trenches, as well as in general all apparatus for
the cleaning, dredging, ?lling of cups, lifting oper
50 ations etc., comprising a grab provided with such
an apparatus.
The principal advantages of the apparatus ac
cording to the invention are as follows:
The movement of the load in the principal
55 plane of the- apparatus permits of emptying the
what reduced scale;
Fig. 3 is an end view at a somewhat reduce-d 25
Fig. 6 is an elevational view of a modi?cation
of this apparatus;
Fig. 7 is a corresponding fragmentary plan
Figs. 8 and 9 are similar views of another modi
Figs. 10, 11 and 12 are respectively elevational,
side and plan views of a device according to the
invention for the digging of trenches;
According to the embodiment represented in
Figs. 1 toy6, the device is for instance adapted
for the sinking of a well I. The grab is carried by 40
a vehicle 3v which carries a lifting winch 4 (Figs.
1 and 3) of any suitable type and a. derrick with
four legs or uprights: two legs 5 of the derrick
rest upon the frame 6 of the Winch, the two other
legs ‘i’ are disposed at the exterior and carry a 45
transmission pulley 8 for the lifting chain or
cable 9. This pulley 8 is situated plumb with
axis X—X.' (Fig. 1) of the well which is to be
The legs 1 of the derrick carry, moreover, 50
through the medium of bars It or any other
means a shaft II.
On this shaft H is pivoted a
balancing member or swinger 52. This swinger
I2 is provided at one of its ends with a pulley I3
loosely mounted on shaft I 4 and Carrying rope 55
9, and two lateral sectors l5 (Figs. 4-5) to which
crown I8 is connected with a swinger l2 the
are secured at 16 the chain or chains I‘! carrying
the opening crown N3 of the grab. The other end
of the swinger I2 is provided with a counter
shaft of which II is carried by two rollers 21
movable upon two stationary rails 28, which
are horizontal and parallel with plane Y-Y.
Swinger l2 carries a sector 29 which occupies
a concentric position with respect to axis El and
weight l9 (Fig. 4) which urges pulley l3 back
towards a position plumb with the well to be
bored, i. e., according to axis X—X.
Pulleys 8 and I3, and the swinger [2 are dis
posed in the principal plane Y-—Y (Figs. 2, 3, 6)
of the grab, i. e., in the plane which contains the
This lat
members 24 serving for the securing to crown l8.
ary point 32. To this sector is also attached at
33 a second cable 34, secured at its other end to 10
a stationary point 35.
The operation is as follows: when the grab is
hooked to the crown l8, swinger l2 pivots about
its shaft II in the direction of arrow f2, drives
sector 29 and produces the winding of cable 34 15
upon this latter, whereas cable 3i unwinds;
swinger l2 and sector 29 are displaced, rollers 27
Shells 20 are moreover pivoted to the usual cen
move upon the two rails 23 and drive the crown,
tral beam 25 of the grab.
bringing it from 18 into 18a and displacing also
The lifting chain or cable 9 which for the
sake of clearness has been supposed to stop at
the head 23, ensures a connection between this
head 23 and the central beam 25 by known
the grab which is suspended from this crown.
Another modi?cation is shown in Figs. 9 and
10. According to this embodiment, the device
employed consists of a carriage 36 to which is
hooked the crown 58', this carriage being movable
upon two inclined rails 23. It is evident that
when the grab is suspended from the crown l8
and thus from carriage 33, this latter moves by
gravity in the direction of arrow )‘3 and the grab
is emptied when the carriage arrives at 36a
two sides of the cable or of the chain 9 and which
is perpendicular to the axis of the winch 4.
The grab is of the usual single-rope type.
The shells 20 are pivoted at 2| upon the bars
15 22, which are in turn pivotally mounted on the
head 23 of the grab comprising, as known per se,
to which is secured at 32} a cable 3!.
ter is on the other hand attached to a station
This connection is of such a kind that
any tension exercised upon this lifting cable or
chain first approach together the two shells 29,
thus closing the grab, and thereafter lifts this
latter as shown in full lines on Fig. 1.
The operation is as follows: at the end of the
30 lifting motion of the grab, its head 23 engages
the opening crown l8 and due to the usual
mechanism of single-rope, grabs is hooked to
this crown. At this moment the whole load rests
upon the lifting chain or cable 9. If this chain
or cable is slackened the load which is thus par
tially abandoned, bears in part upon crown I8.
[is this crown is secured to swinger l2 by means
of chains l1, this swinger begins rotating in the
direction of arrow 1'' (Figs. 1, 4) about shaft ll
40 under the action of the weight of the grab‘ rest
against abutments 3'1 disposed at the end of
rails 28. The carriage is automatically brought
back to the starting point i. e., to the upper part
of rails 28, after the grab has been emptied,
when lifting cable or chain 9 is pulled upon; the
disengagement of the grab and the crown being
possible only after the pulley carried by the car
riage has come back above the well.
Figs. 11, 12 and 13 show diagrammatically the
use of the invention when boring a trench 38.
An emptying chute 39 having the form of a
ing upon the crown l8.
. bihedron is disposed over this trench and per
Due to the fact that a small effort suffices to mits of discharging the materials either on both
rotate swinger 12, the grab arrives still closed sides with respect to the trench or on one of the
into position 29a, represented in dot and dash
45 lines on Fig. 1, the swinger occupying then the
position l2a and the crown 18 the position l8a.~
During the movement, cable or chain 9' is pro
gressively slackened in order to compensate the
difference between the lengths ab and a’b’ (Fig.
50 4), but however the grab rests substantially and
in its major part upon chain or cable 9 and
cannot be opened during the oscillation of
swinger 12.
When the grab has been displaced in plane
55 Y-—Y, it is no more plumb with the line of bor
two sides, the chute itself being pivotally mount- _,
ed, deformable and permitting of obtaining at
will different angles on the two inclined planes.
Naturally, this chute maybe mounted on a car
riage and may be displaced according to needs.
Obviously, the invention is by no means lim
ited to the embodiments which are represented 50
and described, and which are to be regarded as
As it has been indicated, the invention is quite
particularly interesting each time when a grab .
ing X—X. If in this moment the slackening of
cable 9 is continued, the grab entirely rests upon
provided with a single cable and adapted to be
opened and emptied by means of a crown may
be operated without it being necessary to cause
crown [8, opens in the known manner at 202)
it to move according to an arc between the
(Fig. l) and is emptied at 26 away from the
?lling and emptying points.
BO well I (Fig. 1).
When the grab is opened, a device currently
used in grabs provided with emptying crowns,
permits of lifting the grab in the opened position.
As soon as lifting cable or chain 9 is being
65 pulled, the grab becomes partially carried by this
cable and in part carried by the crown l8 until
the grab is arrived above well I. At this time,
swinger i2 has been brought back into its initial
position under the action of counterweight I9,
the grab is released from crown I9 in the known
manner, may be lowered in the opened position
as shown at 200 (Fig. 1) into the well, may be
again closed inside the well, and the cycle con
Figs. 7 and 8 show a modi?cation in which the
It is also evident, that the ?lling and emptying
points of the grab may be, at will, reversed with
respect to the derrick. This has been for in
stance shown in the example of Fig. 14, but this
principle may be used, without departing from
the scope of the invention, in all kinds of appa 66
ratus according to the invention.
Having now described my invention, what I
claim as new and desire to secure by-Letters
Patent, is:
1. Anapparatus for the operation of automatic 70
single rope grabs, wherein the emptying is ef
fected by suspending the grab from a particular
opening element comprising a main frame, an
oscillating arm on this frame adapted to swing
in a vertical plane, a pulley on said arm for guid 75
ing the usual lifting and operating ?exible means
an opening element for the grab suspended from
of the grab, a member secured to said arm and
said movable member, and a winch on said frame
upon which said ?exible means is wound, said
adapted to receive and to carry the grab at the
end of the upward motion thereof and a counter
weight at the other end of said arm adapted to
bring the arm into a determined position after
the grab has' been emptied.
2. An apparatus for the operating of an auto
matic single rope grab wherein the emptying is
10 effected by suspending the grab from a particular
opening element, comprising a main frame, a der
rick with pulleys and winch for the usual single
lifting and operating ?exible means for the grab,
disposed on said frame, a movable member on
15 this frame adapted to oscillate in the main ver
tical plane of said derrick, a guiding member for
said single ?exible means located on one end of
said oscillating member, a counterweight on the
other end of said oscillating member adapted to
20 bring it into a determined position of rest and a
ring-shaped opening element carried by said os
cillating member, and from which the grab is
suspended at the end of its lifting movement,
opening element being adapted to carry the grab
at the end of its lifting motion, and upon slacken
ing of said ?exible means to cause the movable
member together with the grab and its contents
to be automatically displaced in said vertical plane
towards its emptying position under the sole
action of the weight of this grab and. its contents. 10
6. An apparatus adapted to operate a single
rope-grab, wherein the emptying is effected by
suspending the grab from an opening element,
comprising a main frame, a winch on said frame,
single ?exible means serving to operate the grab 15
and wound on said winch, a guiding means for
said ?exible means at the upper part of said
frame, an oscillating arm adapted to swing about
a horizontal pivot on said frame and always in a
single vertical plane, a counterweight on one end 20
of said arm, adapted to bring it in a determined
position, a guiding means for said ?exible means
on the other end of this arm, and a ring-shaped
said oscillating member carrying thus the grab ' opening member for the grab suspended from said
25 and its contents at the end of its lifting motion second guiding means, said latter member being 25
and being caused to move under the action of adapted to- carry the grab and its contents at
gravity while bringing the grab into its emptying the end of the lifting motion thereof and to trans
3. An apparatus according to claim 2, further
30 comprising a stationary pivot about which said
oscillating member is adapted to swing.
4. An apparatus according to claim 2, compris
ing rollers carrying said movable member, guid
ing means for said rollers, a sector shaped member
35 on said movable. member and two ?exible mem
bers secured at one of their ends to stationary
points and at their other ends to said sector, any
swinging of said movable element producing the
winding of one of these ?exible members upon the
40 sector and thereby the displacement of said
mit their weight to the arm so as to cause it to
move automatically about its pivot and bring the
grab into the emptying position upon slackening 30
of said flexible means.
7. An apparatus according to claim 5, wherein
said opening element is suspended from said mov
able member through the intermediary of said
guiding means.
8. An apparatus according to claim 5, com
prising ?exible means by which said opening ele
ment is secured to said guiding means and thereby
to the movable element.
9. An apparatus according to claim 5, wherein 40
said movable member consists of a sliding car
5. An apparatus for the operating of automatic
grabs having a single ?exible operating means
such as a rope, wherein the emptying is effected
said movable member consists of a sliding carriage
and further comprising inclined guiding means 45
for said carriage, which carries said guiding
45 by suspending the grab from a particular open
ing element, comprising a main frame, a movable
member on this frame, adapted to reciprocate in
a single vertical, plane, guiding means on said
movable element for the usual single ?exible
50 means for the lifting and operating of the grab»,
10. An apparatus according to claim 5-, wherein
means and is provided with suitable rollers co
operating with said inclined guiding means.
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