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Патент USA US2407932

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Sept. 17, 1946.
A. A. L_.A PQINTE
_ 2,407,930
`SHOVEL
Filed Maren 9, 1945
3` Sheets-Sheet 1_.
Sept. 17, 1946.
2,407,930
A. A. LA POINTE
SHOVEL
Filed March 9, 1945
5 Sheets-Sheet 2
:li
’
'lm/ENTOR.
„Äbeffß La Poinfe
BY
Sept. 17, 1946._
A_ A_ LA POlNTE `
2,407,930
SHOVEL
Filed March 9, 1945
3 Sheets-Sheet 3
2,407,930
Patented Sept. 17, 1946
iJNlTE
STATES PATENT OFFICE
e
2,407,930
"
SHOVEL
~
Albert A. La Pointe, West Hartford, Conn., as
signor to La Pointe Engineering Gompany,
Unionville, Conn., a copartnership
`
Application March 9, 1945, Serial No. 581,729
5 Claims. (Cl. 214-81)
1
_This invention relates to Vpower shovels.
mechanism of the device;
. ~The principal object >of the invention _is to pro
vide _a power shovel which may be operated in
l-ar view in Fig. 2; and
Fig. 8 is a side'view of >a locking Vmechanism for
use in connection with the catch mechanism
. Another object of the vinvention is to provide
shown in similar view in Fig. 1.
a power `shovel which operates in combination
with a .conventional motor truck and which au
with a _pair of arms `I0 which are pivoted at one
end, as Will hereinafter appear, and which carry
at their free ends _a scoop II. Each arm is pro
vided with a bracket rest or skid `I2 and the >scoop
tion when ,the truck moves in one direction and
which ,automatically `dumps the shoveied mate
rial into the truck body .when the truck moves
.
A further object is the .provision ci a power
shovel for conventional motor trucks which may
be demountably connected to the drive wheels
of .said trucks and which may function „in con
nection therewith without interfering with .the
normal .operation of the truck itself and with 20
provided with. -
»
Referring now to Figs. 1 to 5, inclusive, the
device herein described and _claimed is provided
tomatically enters into operative shoveling posi
such dumping mechanism as said truck may be
`
use in connection with the latch shown in simi
,
inthe opposite direction.
`
Fig. 7 is aside view of la locking mechanism `for
combination with ,a conventional motor truck
and which may be `powered by the same engine
which drives the truck.
2
3 of another embodiment ofthe pivot and ratchet
is provided with `conribination skids and diggers
I3. At its pivoted end, each arm I0 is aiiiXed,
as by welding, to >a pair of 4plates I4 which are
provided with open `slots carrying a semi-cylin
drical `plate I_E, said `plate comprising half of the
bearing by which said arm ~is pivotally mounted,
as will hereinafter appear. Plate I5 may be af
fixed to .the arm proper, as by welding, or in any
.
other conventional manner.
Still another `object of the invention is the
Semi-cylindrical member |56 carried by latch `I‘I
provision of a powershovel of the :character de
which is pivoted at I8 to said plates I4, com
25
scribed which may Íbe utilized .in ,combination
prises the second half of said bearing by which
with any kind of vehicle having a pair of `drive
said arm is pivotally mounted. It will b_e seen
Wheels and a body into >whíchto >dump the .shov
that when the latch member I‘I is lpivotally raised,
eled material.
a
path of entry is provided through .the slots
A still further object is the ‘.provisionof a power
30 of plates I4 to half bearing I5. When .the latch
shovel ofthe character described which may be
I'I is lowered, the path `of entry is shut oiî and
used in combination with a .pair of drive shafts
half bearing I6 meets and cooperates with half
or `in combination `.with a singleelongated drive
shaft which is affixed .to a horizontally recipro
cating mechanism of any desirable type and con
struction, said device being operable in connec
tion with a dump truck, ,a railroad freight car,
a conveyor belt, or in connection with any anal
ogous device or apparatus.
yThese and other objects areattained by mech
anism illustrated in the accompanying drawings
in which
Fig. 1 is ya perspective view of the device shown
in .mounting position with respect to a conven
tional dump truck, said device being shown in
dotted lines mounted on said truck in two dif
ferent positions with respect thereto;
Fig. ‘2 i-s a face `View of the pivot and ‘ratchet
construction of ‘said device;
‘
bearing I5 to provide `the necessary `bearing by
means of whichsaid arm I0 pivots. ,A V-shaped
? guide or ñnder I9 affixed to plates »I4 straddles
said latch member.
Also pivoted to plates I4 at 20 is a pawl 2l.
Said pawl is shaped substantially llike an F; the
top cross piece thereof comprising .the‘paiwl _mem
ber proper `and the longitudinal member ,22 there
of comprising part of the releasing mechanism
hereinafter described. The lower and shorter
cross piece 23 of said pawl is bent over‘at _its free
end into the path of movement >of latchmember
I'I whensaid latch member is raised. The ob
ject- of this construction ris to Íprovide `an auto
matic ratchet `releasing mechanism which oper
ates when the Alatch is opened. The `relative po
sitions of the latch ¿member I1 and Athe cross
Fig. 3 is a section on the line 3_3 of Fig. 2; 50 member 23 `being as described, >when 1the latch
member is raised and brought over toward the
Fig. ‘l` is a plan elevational view of the mecha
rear it engages said cross member and causes .the
nism shown in Figs. 2 and 3;
Fig. v5 is a sectional view ofthe scoop `of said .
pawl <to ` disengage .the ‘_ ratchet wheel `hereinafter
described. Spring 2.4,afñxed at one Ven_d to plates
device;
Fig. -6 isa >sectional»viewsimilar to that of Fig. 55 I4 and _at the other end to the longitudinal mem
2,407,930
3
ber 22 of said pawl, serves to urge the pawl into
engagement with said ratchetwheel.
Af‘uxed by means of stud bolts 2s to hub mem
bers 3U of conventional truck wheels 3l of dump'
ing truck 32 are hub extensions or -stud shafts 33
carrying self-oiling sleeves or bushings 23. Ro
tatably mounted on each said stud shaft is a drum
34 which is provided with external ratchet teeth
35 and internal gear teeth 3b. Splined to the stud
shaft within said drum is a gear wheel 3l. Gear
To reverse the operation, the catch lever 53 is
pivoted on pivot 54 and pin 52 is thereby released.
It will be seen in Fig. 1 that the handle end 53a
of said catch member extends to the cab 32a of
the dumping truck thereby enabling the driver
thereof to» manipulate the catch member from
the cab'. The truck is now moved in the opposite
direction, namely toward the rear. TheY force
exerted by gravity upon arms lo and scoop Il
now tends to bring said arms and said scoop
`’down toward the grorund. The ratchet mecha
Wheel 3'1 meshesv »with an idler gear wheel or pin- '
ion 38 within said drum and idler 38, in turn,
meshes with a second idler 39, also within said
" nism above described controls the speed of this'
descent, that is, the speed of the descent will be
governed by the speed at which the truck is
drum and idler 39, in its turn, engages the inter
nal gear teeth 36 of said drum. A centrally aper
caused to move toward the rear. When the de
tured circular plate 4l afûxed by means of screws
43 to the open side of drum 34 encloses the gear.
wheel and pinions above mentioned.
In consequence of such construction, when
wheelseSl of vthe dumping truck are caused to ro 20
tate," stud shafts 33' will be caused to rotate inte
grally with them and so will gear wheels 3l'. By
reason of the gear train which connects said gear
wheels 3l with the internal gear teeth _36 of the
drums34, the drums are caused to `rotate but at a 25
much slower rate of speed.
'
'
v
It will be seen thatY the bearing comprising
semi-cylindrical «bearings l‘5'and I6 is adapted to
vice reaches vthe position shown by the solid lines
in Fig. 1, further movement of the truck toward
the rear will have no effect upon the position of
said device relative to the truck. In this fashion,
it is pushed into a pile of sand or gravel or any
other material sought toi-be ‘removed A‘by means
of the truck. When a suii‘icient amount `of this
material is scooped up, the truckis stopped and
it is now made to move forward again. rThis has
the ei'lect, as has already been indicated, of caus
ing the arms l0 to pivot upwardly on Vthe stud
shafts and hence the scoop l l to move' upwardly
in an arcuate line of movement untila position
such as the position indicated by the dotted lines
5B is'attained. At this point, the force of gravity
ride on sleeve 28 immediately adjacent drum 34.
A‘cap 42 aiìxed to the free end of the stud shaft
by means of a stud bolt 43 prevents axial dis
placement of the bearing and hence of the arm to
exerted upon the scooped upvmaterial causes it -
to fall into the body of the truck; `the momentum
of the scooped up material, controlled by the for
ward speed of the truck, carries said material toa
which itis amxed with respect to the stud shaft.
f-In Fig. 1 the device is shown in mounting po
sition with respect to the stud shafts 33, guides or
finders I9 resting upon the stud shaft sleeves 28.
point more or. less forward of vthe arms.
These
operations are continued in the mannerindicated
When the latch members I7 are raised, an open
until the work is' done. Whenit' is time to drive
the truck away, the arms and scoop are brought
path- parallel with ‘and adjacent to said guide
members AI9 vis opened, leading to the slots in
up, into the position indicated by the dotted lines
plates I4 and to the semi-cylindrical or half 40 E5. As hasalready been mentioned, lever catch
bearing members l5. 4'I‘he truck may be backed
53 engages and holds said arms in said position
up, thereby causing the device and more partic
while, at the same time, stud posts 49 disengage
ularly the guard members I9 vthereof Vto ride up
the pawls from the ratchet wheels. The truck
on said- stud shaft sleeves until contact is made
may now be operated in the usual manner with
between said'sleeves and the'half bearings i5, or 45 out any interference on the part of the scoop
the/device itself may be pushed up upon said stud
device herein described.
shaft sleeves by hand. YIn either case, when the
stud shaft sleeves and the half bearings l5 are
properly positioned with respect to each other,
the latches l'! are returned to their normal posi
tion of rest, thereby bringing half bearings I5
abrupt, yet cushioned stop, thereby throwing the
portion >22 of the pawl members‘are engaged by
stud posts 49 nxed in each side o-f the truck body
and the pawls are thereby caused to ldisengage
the ratchet teeth 35 against the tension exerted
upon> saidpawl _by spring 24. ASimultaneously
therewith, a pin 52 on one of said arms lilis en»
lgaged by a catch member 53 pivotedto Aone side
of the truck'body by means of pivot pin 54.'v A
.
.
.
.
50 tween thetruck body and the drive wheels may
into contact with said sleeves.
WhenV the device is thus properly positioned
on the stud shafts as Yhereinabove described,
pawls 2l engage the` ratchet teeth 35 of drums 34 55
' in response to the tension exerted upon them Aby
springs 24. rThe device is now ready tobe used.
It will be seen that when the truck is caused
to move forward, arms ÍIEI will be caused to pivot
upwardly on said stud shafts until they reach
the position indicated by dotted lines 5i] in Fig. 1. 60
At this point, a bumper 5I on each side of the
truck body engages said arms to bring them to an
scooped up'material, so to speak, into the truck
body at a point substantiallyY forward of the arms.
At the same time and pointythe longitudinal
.
' Bearing in mind that frequently the/truck in
question may be required to Atraverse uneven
roads or ground and that relative movementbe
65
thereby be eiîected, the following features .are
incorporated into the mechanism: a tension
spring 55 afûxed at its upper end -to a bracket 56
mounted on the truck -body and at its lower end
to the handle end of the catch member53,I tends
to urge said catch member into uninterrupted
engagement with stud pin 52 irrespective -ofthe -
relative position of` the truck body with respect
to the truck wheels. To `insureisuch uninter- ’
rupted engagement, a further precautionlis taken.
A sliding bolt member 51 slidably affixed to the
catch end of catch member 53 by means of brack- ,
ets 58 locks said catch member into positive en
gagement with said pin 52. A pin 5S on bolt 51
engaged by springmembers 59a'on brackets 58 Y
positions said bolt in'locking'or unlocking posi~
tion.
This locking mechanism is showne'very
clearly in Fig. 8. It has its counterpart in Fig. ‘7.
rIfhere >a locking mechanism 10 constructed in the
same manner and of the same parts as thelock
ing mechanism above described, isw‘aiîixed to the
latch members I1. It will be seen that when the
bolts of said locking- members 10 are placed in
locking` position withrespect to guides orñnders
l5, they engage said Aguides and thereby eñîehctive
aromas@
15
ly prevent upward `or opening movement of- the
response to the attraction oli gravity when the
drive wheels rotate in the opposite> direction,
latch
further rotation of the4 drive wheels in the latter
members.
-
i
-
i
-
Y
-In Fig. `E», a` slightly modified embodiment of
the «invention _is shown. In this embodiment, a
ratchet wheel ïëiî is splined to the stud shait or
hub extension iii-l. This ratchet wheel is en
gaged by the pawl above described in the manner
above described. In all other respects this em
bodiment is similar to the embodiment shown‘in
Figs. l to 5, inclusive.
-
»
The invention herein described and claimed is
considered to be a basic invention and many
modifications may be incorporated therein with
out departing from the basic principles thereof.
direction causing no vertical chang'e‘in the vground
position of the scoop.
'
'
2. The combination with `a vehicle having a
body and a pair of drive wheels, of a pair of
hub >extensions on said drive wheels, :a pair of
ratchet wheels ñxedly mounted on said hub
extensions, a pair of lifting-arms pivotally mount
ed at one end on said hub extensions, a scoop
mounted at the opposite end of said arms and a
pair of pawls mounted on said arms adjacent
said pivoted end and engaging said ratchet wheels
whereby the arms are caused to pivot upwardly
For example, although the device has been de
raising the scoop in an arcuate line of move
scribed above in connection with a motor truck
ment from a ground position to a position above
having a rear wheel drive, it is clear that the
the vehicle body when the drive wheels rotate
device may be attached to any other kind of
in one direction, and the arms are permitted
vehicle having a pair of drive wheels and a body
to pivot downwardly and the scoop- to return to
into which to dump the material sought to be 20 the ground position along said arcuate line of
removed. It is immaterial whether these drive
movement in response to the attraction of grav
wheels are rear wheels or front wheels or wheels
ity when the drive wheels rotate in the opposite
intermediate the front and rear. It is clear too,
direction, further rotation of the drive wheels in
that the device may be made to operate at the
the latter direction causing no vertical change
25
front of the vehicle instead of at the rear. In
in the ground position of the scoop.
such case, the scoop operation would take place
3. The combination with a vehicle having a
when the vehicle moves in a forward direction
body and a pair of drive wheels, of a pair of
and the lifting operation when it moves toward
hub extensions on said drive wheels, a pair of
the rear. As has already been indicated, the
ratchet wheels rotatably mounted on said hub
mechanism herein described may be adapted to
extensions, a pair of speed reducing gear trains
a pair of drive shafts or to a single elongated
connecting said hub extensions to said ratchet
drive shaft mounted on a horizontally recip
wheels, a pair of lifting arms pivotally mounted
rocating mechanism. The dumping body need
at one end on said hub extensions, a scoop mount
not be attached directly or indirectly to the drive
ed at the opposite end of said arms and a pair
shafts but may instead be a wholly separate 35 of pawls mounted on said arms adjacent said
and independent unit mounted, for example, on
pivoted end and engaging said ratchet wheels
a conveyor belt or on railroad car trucks. The
whereby the arms are caused to- pivot upwardly
arms li! are shown to be tubular members. Obvi
raising the scoop in an arcuate line of movement
ously, this need not necessarily be the case.
from a ground position to a'position above the
40
I-shaped members or members of other suitable
vehicle body when the drive wheels rotate in
shape would certainly suilice. Under certain cir
one direction, and the arms are permitted to
cumstances, a single arm instead of the two
pivot downwardly and the scoop to return to the
arms herein described, would be sufficient. A
ground position along said arcuate line of move
skilled mechanic presented with a specific prob
ment in response to the attraction of gravity
lem could readily determine whether tofuse one
when the drive wheels rotate in the oppositeA
arm or two arms or, for that matter, a greater
direction, further rotation of the drive wheels in
number than two arms. Other kinds of ratchet
the latter direction causing no vertical change
mechanisms, latch members, catch members and
in the ground. position of the scoop.
release mechanisms may be used without depart
4. The combination with a vehicle having a
50
ing from the basic principles of the invention as
body and a pair of drive wheels, of a pair of hub
described and claimed. Aside from ratchet mech
extensions on said drive wheels, a pair of gear
anisms other types of mechanism may be used
wheels ñxedly mounted on said hub extensions,
to effect upward movement of the arms l0.
a pair of drums having external ratchet teeth
Thus, for example, one way friction grabbers
and internal gear teeth rotatably mounted on
similar in construction to the brake band and
said hub extensions, a pair of speed reducing gear
drum constructions of older automobiles may be
trains connecting said gear wheels to said drum
used in place of the ratchet mechanisms here
gear teeth, a pair of lifting arms pivotally mount-V
inabove described.
ed at one end on said hub extensions, a scoop
I claim:
l. The combination with a vehicle having a
body and a pair of drive wheels, of a pair of
mounted at the opposite end of said. arms and a
pair of pawls mounted on said arms adjacent
ratchet wheels connected to said drive wheels
coaxially therewith, a pair of lifting arms piv
ótally mounted at one end coaxially with said
drive and ratchet wheels, a scoop mounted at
the opposite end of said arms and a pair of pawls
mounted on said arms adjacent said pivoted end
and engaging said ratchet wheels whereby the
arms are caused to pivot upwardly raising the
said pivoted end and engaging said ratchet wheels
whereby the arms are` caused to pivot upwardly
raising the scoop in an arcuate line of movement
in response to the attraction of gravity when
the drive wheels rotate in the opposite direction.
5. The combination with a vehicle having a
body and a pair of drive wheels, of a pair of
ratchet wheels connected to said drive wheels
coaxially therewith, a pair of lifting arms piv
70
scoop in an arcuate line of movement from a
otally mounted at one end coaxially with said
ground position to a position above the vehicle
drive and ratchet wheels, a scoop mounted at the
body when the drive wheels rotate in one direc
opposite end of said arms and a pair of pawls
tion, and the arms are permitted to pivot down
mounted on said arms adjacent said pivoted end
wardly and the scoop to return to the ground
and engaging said ratchet wheels whereby the
position along said arcuate line of movement in 75
2,407,930
arms are caused to pivot upwardly raising the
scoopk in an arcuate line of movement from a
ground position to a position above the vehicle
8
which engage said pawlsrwhen the lifting _arms
pivot upwardly to a predeterminedy position,> caus- '
ing said pawls to pivot out of engagement with
body when the drive Wheels rotate in one direc
tion, and the arms are permitted to pivot down 5 said ratchet` Wheels, a catch andlocking mecha
nism which engages and holds said lifting arms
wardly and the scoop to return to the ground
when said predetermined position is Yreached,
position along said arcuate line of movement in
and a latch and locking mechanism which latches
response to the attraction of gravity when the
and locks said arms in said pivotally mounted
drive wheels rotate in the opposite direction, a
position.
pair of release mechanismsV on said vehicle body 10
ALBERT A. LA POINTE.
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