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Патент USA US3062396

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Nov. 6, 1962
3,062,386
w. E. JOHNSON
MOBILE CRANE CONSTRUCTION
Filed May 5, 1960
40
2 Sheets-Sheet 1
I/
WALTER E. JOHNSON
BY .
FIG. 5
w émw $94M‘
ATTORNEYS
United States Patent O??ce
1
3,062,386
3,052,386
Patented Nov. 6, 1962
2
Other objects and advantages of the invention will be
pointed out speci?cally or will become apparent from the
MOBILE CRANE QONSTRUCTION
Walter E. Johnson, 3211 W. 19th St., Topeka, Kans.
Filed May 3, 1960, Ser. No. 26,590
12 Claims. (Cl. 212—145)
with the appended claims and the accompanying draw
ings, in which:
This invention relates to mobile cranes having extensi
FIGURE 1 is a fragmentary, side elevational view of a
mobile crane constructed in accordance with the inven
ble and retractable outrigger and jack supporting devices
and more particularly the invention pertains to the means
following description when it is considered in conjunction
tion;
FIGURE 2 is an enlarged, front elevational view of a
by which the outriggers and jack devices are actuated.
10 portion of the crane shown in FIGURE 1, one of the out
This application is a continuation—in-part of co-pending
riggers and one of the jacks being shown in extended,
application Serial No. 766,350, ?led October 9, 1958, now
crane supporting position;
abandoned.
FIGURE 3 is a top plan view of the structure shown
Wrecking and repair cranes of the kind utilized by
in FIGURE 2;
railroads must be capable of performing their functions 15
FIGURE 4 is an enlarged, partly elevational and partly
under the most adverse conditions and in a minimum of
sectional view of stabilizing apparatus forming a part of
time in order that the railroad tracks may be repaired or
the invention;
cleared as quickly as possible so as not to delay unduly
FIGURE 5 is an enlarged, vertical sectional view
freight and passenger trains. In many of the operations
through one of the jacks mounted at an end of an out
required to be performed by such cranes, it is necessary 20 rigger;
to extend the outriggers and the jack devices to provide
FIGURE 6 is a fragmentary, top plan view of a por
su?icient stability to the cranes to overcome any possi
tion of the apparatus shown in FIGURE 5; and
bility of their tipping. Cranes of the kind with which the
FIGURE 7 is a fragmentary, enlarged, front eleva
invention is concerned have their outriggers and jack de
tional view of manual means for actuating an outrigger.
vices actuated by rotatable mechanisms and it is pre 25
A mobile crane 0f the kind with which the invention
ferred that power means such as a pneumatic wrench be
is concerned is disclosed in FIGURE 1 as comprising
capable of actuating each of the rotatable mechanisms of
a chassis or body I mounted upon trucks 2 provided with
a crane. When a power device such as a pneumatic
flanged wheels 3 adapted to roll upon rails 4 forming a
wrench is applied to the rotatable actuator, considerable
railroad track. The body 1 is provided with a turntable
torque may be developed which is di?icult for a crewman 30 5 of conventional construction on which is rotatably
to counteract without assistance from other members of
mounted a cab 6 in which are housed an engine and
the crew.
operating controls. Pivoted on the cab 6 is a boom 7
which is controlled by a cable 8 and which is provided
with a hook or magnet (not shown) that is controlled by
Since crane crews are relatively small and
have a number of functions to perform, it is not always
possible to spare more than one man to operate the actuat
ing devices without materially delaying the preparations 35 a cable 9.
for conditioning the crane for working operations or for
movement after the working operations have been com
pleted.
At each end of the body 1 is mounted a housing 10
comprising a number of frame elements 11 and 12 and in
each housing is mounted a pair of extensible and retract
As has been referred to earlier, cranes of the kind un
able outriggers designated by the reference character 13.
der consideration must be available for use in all kinds 40 One of the pair of outriggers at each end of the crane is
of weather. During wintertime or in other periods of
extremely cold weather, it is not unusual for the rotatable
actuating mechanism for the outriggers and jacks to be
adapted to be extended laterally towards the left and the
other is adapted to be extended laterally towards the
right. In all other respects, each of the outriggers is the
come covered with ice or frost to such an extent that it
same, so ‘only one need be shown and described in detail.
is not always possible for a pneumatic wrench to break 45 The outrigger selected for detailed disclosure may be
the ice and effect operation of the actuating devices.
considered as being the outrigger at either the right hand
Some of the cranes in use include manual devices which
end at the front of the crane or the left hand end at the
may be utilized in breaking the ice, but it has not been
rear of the crane.
possible heretofore for a single crewman to operate both
The outrigger 13 may be of I-beam construction having
a pneumatic wrench and the manual apparatus simultane 50 upper and lower ?anges 14 and 15, respectively, inter
ously, so that one helps the other, because of the di?iculty
connected by a web 16. The outrigger is supported upon
rollers 17 journaled in the housing members 11 and 12
wrench or the like.
and the height of the outrigger is slightly less than the
An object of this invention is to provide power actuat
55 height of the housing 10 for a purpose which will be
ing means for the outriggers and jacks of a mobile crane
pointed out subsequently. Means for effecting exten
construction and which may be operated by one man
sion and retraction of the outrigger 13 comprises a rotat
irrespective of the weather conditions existing at the time
able device 18 including a shaft 19 having a squared
operation is desired.
outer end 19a (see FIGURE 7) journaled in a bear
Another object of the invention is to provide means
60 ing support 20 which includes a ?ange 21 that may be
in overcoming the torque developed by a pneumatic
for stabilizing power actuated means for operating the out
mounted by means of bolts 22 or the like on the frame
riggers and jacks of a mobile crane so as to relieve a
member 12. The shaft 19 extends inwardly of the hous
ing and terminates at a position between the ?anges 14
A further object of the invention is to provide stabiliz
and 15. The terminal end of the shaft 19 has a pulley
ing means of the kind referred to which are uniform in
65 or sprocket wheel 23 keyed thereto so that the rotation
every instance so as to enable the same power device to
of the shaft 19 will impart rotation to the wheel 23.
be used for actuating not only the outriggers, but also
Means interconnects the device 18 and the outrigger
the jacks.
13 for effecting movements of the outrigger in response
A still further object of the invention is to provide a
to rotation of the shaft 19 and comprises a ?exible cable
crewman from having to overcome torque.
mobile crane construction in which a single workman may use both power operated means and manual means
simultaneously fc. actuating the outriggers of a crane.
or sprocket chain 24 having one of its ends anchored to
a post 25 mounted on the outrigger web 16 near the
lower ?ange 15. The other end of the chain 24 is
3,062,386
3
connected to an I-bolt 26 which is slideably mounted in
a bracket 27 secured to the lower surface of the out
rigger ?ange 14. Associated with the bolt 26 is a
spring 28 and an adjustable nut 29 which cooperate to
maintain the element 24 under proper tension.
The chain 24 includes an upper run which extends
substantially the full length of the outrigger 13 and is
4
in socket members 57 and 58 located adjacent to the
devices 18 and 31, respectively. The socket member 57
may comprise a tubular member rigidly secured to the
housing member 12 and the socket member 58 may com
prise a similar tubular member rigidly secured to the jack
housing 32.
The yoke 54 may be separate and apart from the
wrench 47, but it is preferred that the yoke be rigidly
trained around a rotatable sprocket wheel 30 aligned
clamped to the wrench. To accomplish this objective,
with the wheel 23 and journaled on a stub shaft 30a that
is welded or otherwise suitably ?xed on the housing 10. 10 the harness 53 includes a clamp bar 59 having openings
at its ends adapted to receive the arms of the yoke, the
From the sprocket wheel 30 the chain passes around the
sprocket wheel 23 and thence proceeds to the post 25.
Although a sprocket chain and sprocket wheels are shown
in the drawings, they may be replaced by a ?exible cable
and pulleys. The only difference which would be re
quired in the alternative arrangement would be the loop
ing of a cable twice around a sheave substituted for the
sprocket wheel 23.
At the outer end of each of the outriggers 13 is ?xed
clamping bar 59 being so shaped as to complement the
shape of the wrench body against which it is to bear.
In order to maintain the bar 59 in clamping engagement
against the wrench 47, the ends of the yoke arms 55 may
be threaded for the reception of lock nuts 60. Inas
much as it is preferred that the yoke 54 be rigidly con
nected to the wrench 47, it is important that the socket
members 57 and 58 of the stabilizing means be located
a jack device designated generally by the reference char
the same distance from the axes of rotation of their re
acter 31 and which comprises a housing 32 including a
mounting ?ange 33 which may be ?xed to the web of
the outrigger 13 by suitable means such as bolts 33a.
The housing 32 is hollow and has welded or otherwise
suitably ?xed therein a vertically extending post 34 on
which is provided a spline tooth or key 35. Slideably
mounted on the post 34 is a screw threaded element 36
having a bore 37 and a keyway 38 which respectively
receive the post 34 and the key 35. The threaded mem
ber 36 extends through an opening 39 formed in the
lower part of the housing 32 and is provided at its lower
end with a swivelable supporting foot 40 of known con
spective operating shafts 19 and 44.
The operating parts of the jack devices are fairly well
protected from weather, due to their being located, for the
main part, wholly within the housing 32. The operating
struction.
Also mounted within the housing 32 is a rotatable
sleeve-like element 41 having threads formed on its inner
surface to mate with the threads of the threaded element
36. The element 41 is provided with external gear teeth
The apparatus 61 includes a lever arm 62 Which is
loosely mounted at one end on the shaft 19. The free
end of tne lever is bell-shaped and is provided with a
socket 63 adapted to receive one end of an extension
parts for actuating the outriggers, however, are more ex
posed to weather, so it is possible for frost and ice to form
on the sprocket wheels and chains and make it difficult
for the wrench 47 to apply enough force to the shaft
19 to cause operation of the mechanism 18. Accordingly,
manually operable means 61 is associated with the mecha
nism 18 for enabling a crew member to assist the opera
tion of the wrench 47 when desired.
42 which are adapted to mesh with the teeth of an actuat
lever 64, by means of which considerable leverage may be
applied to the arm 62. Pivotally mounted on the lever
ing pinion 43, the latter being keyed or otherwise suit
arm 62 by means of a pin 64 is a substantially half-moon
vertical movement of the element 36 so as to extend or
keyed to the shaft 19 so as to rotate with the latter and
retract the latter with respect to the housing 32.
It is preferred that power means such as a pneumatic
the ratchet wheel is located in a position to be engaged by
the tooth at either end of the pawl 65 when the latter is
moved from its neutral position. With a tooth of the
pawl 65 in engagement with a tooth of the ratchet wheel
69, the application of force to rotate the lever arm 62 will
cause corresponding rotation of the ratchet wheel 69 and
ably secured to a spindle 44 which is mounted in the 40 shaped ratchet pawl 65 which normally is maintained in
a neutral position by the force of a spring pressed pin
housing 32 for rotation above an axis parallel to the axis
66 mounted in a housing 67 on the arm 62 and having
of the screw element 36. The upper end of the spindle
its outer end received in a notch formed in the pawl 65.
44 is squared as at 45 and is received in a well or recess
The pawl 65 easily may be moved from its neutral posi
46 formed in the upper surface of the housing 32. The
tion by means of an operating handle 68 which is secured
construction and arrangement of the parts of the jack
at one end to the pawl. A toothed ratchet wheel 69 is
31 are such that rotation of the spindle 44 will cause
wrench 47 be utilized in effecting movements of the out- ‘
riggers and the jacks. Such wrenches are known and
include a body portion 48 in which are housed impellers,
gears, and the like, which are responsive to air pressure to
effect rotation in one direction or the other of a spindle
49 mounted in a suitable housing structure 50 and having
one of its ends provided with a socket 51 of such size
as to receive the squared ends of the rotatable shafts
19 and 44. Suitable switches or valves (not shown) also
are incorporated in the wrench 47 to control the direc
of theihaft 19.
To condition the apparatus for operation of the crane
at a particular location, the wrench 47, carrying the yoke
source of compressed air located within the cab of the
54, may have the stem 56 ?tted in the socket member
57 adjacent to the apparatus 18 and the ?tting 51 on the
wrench spindle ?tted on the squared end 19a of the shaft
19. Power then may be applied to the shaft 19 to cause
rotation of the sprocket wheel 23 in a direction to effect
extension of the outrigger 13. If conditions are such that
crane.
the Wrench is incapable of moving the outrigger under
tion of rotation of the operating spindle 49. The wrench
may be coupled to a ?exible hose 52 or the like to a
its own power, the operator need use only one hand to
When using the pneumatic wrench 47 to actuate the
outriggers and jacks, considerable torque is apt to be 65 steady the wrench, inasmuch as the wrench will be sup
ported by the harness 53 and the shaft 19, and use the
developed on the wrench which must be counteracted in
other hand to manipulate the manual apparatus 61 so as
order that the full power of the wrench may be applied
to assist the wrench in actuating the outrigger.
to actuating the Outriggers and jacks. Means for sta
When the outrigger 13 has been extended the desired
bilizing the wrench and, consequently, counteracting the
torque comprises a harness device 53 (see particularly 70 distance, the wrench 47 may be disconnected from the
FIGURE 4) composed of a substantially U-shaped yoke
apparatus 18 and connected instead to the jack 31 so as to
54 having arms 55 spaced apart a distance su?icient to
receive snugly a portion of the body 48 of a wrench.
The arms 55 may be welded or otherwise rigidly secured
to a projecting stem 56 which is adapted to be received
cause extension of the leg 36. During the extension of the
jack part 36, the torque of the wrench will be taken up
or absorbed by the harness parts 54 and 58.
It is customary to utilize blocks 70 of wood or the like
5
3,062,386
6
to provide a rigid bearing surface against which the foot
ing said device and said outrigger for moving the latter
41) of a jack may bear. Such blocks are shown in FIG
URE 2. When a jack has been extended to bear against
in response to rotation of said device, a second rotatable
device associated with said jack and adapted to be rotated
by said power means, and means interconnecting said
its supporting surface, the outrigger 13 will be canted
or tilted somewhat, due to the slight clearance between
its upper ?ange 14 and the housing 10. The tilting of
the outrigger causes the upper ?ange to bear against
second device and said part of said jack for moving said
part in response to rotation of said second device: the
combination of ?rst stabilizing means supported by said
housing member and located a predetermined distance
resistance to inadvertent movement of the outrigger. AS
from the axis of rotation of said ?rst device; and second
an outrigger is tilted, its movement within the housing 10 stabilizing means supported by said outrigger and located
will cause its inner end to bear against a supporting block
a predetermined distance from the axis of rotation of said
71 which may be ?xed to the housing 10 in any suitable
second device, each of said stabilizing means being oper
the upper wall of the housing so as to provide a frictional
manner. The engagement of the inner end of an outrigger
able to removably support and stabilize said power means
with the block will permit the outrigger to be raised from
during operation thereof.
’
the rollers 17 and thereby avoid possible damage to the 15
7. The construction set forth in claim 6 wherein each
latter during working operations of the crane. The out
of said stabilizing means is located the same distance from
riggers also are maintained in extended position by means
the axis of rotation of its associated device.
of a pin 72 (see FIGURE 2) which may extend through
8. The construction set forth in claim 6 wherein each
aligned openings in the member 12 and in the web 16 of
of said stabilizing means comprises a socket element and
the outrigger beam. The pin 72 also may be used' to 20 a projecting element adapted to be received in said
maintain the outrigger in retracted position during move
socket element, one of said elements being mounted adja
ment of the crane from place to place, and for this pur
cent to its respective rotatable device and the other of said
pose the web 16 of the beam has a second opening 73
elements being mounted on said power means.
therein near its outer end which also is adapted to receive
9. The construction set forth in claim 8 wherein said
the pin 72.
25 projecting element is mounted on said power means.
The disclosed embodiment is representative of a pres
10. The construction set forth in claim 9 wherein said
ently preferred form of the invention, but is intended to
projecting element includes a harness structure for main
be illustrative rather than de?nitive thereof. The inven
taining said projecting element in ?xed relation to said
tion is de?ned in the claims.
power means.
I claim:
30
11. A mobile crane comprising a housing member; at
1. In a mobile crane or the like having a housing mem
ber, at least one support member mounted on said hous
ing member for movements relative thereto from a re
tracted position to an extended position and return, port
least one support member mounted on said housing mem
ber for movements relative thereto from a retracted posi
tion to an extended position and return; portable power
means; a rotatable device carried by one of said mem
able power means, a rotatable device carried by one of 35 bers and being adapted for rotation by said power means;
said members and being adapted for connection to and
means interconnecting said device and the other of said
rotation by said power means, and means interconnecting
members operable to effect movements of said support
said device and the other of said members operable to
member in response to rotation of said device; manually
effect movements of said support member in response to
operable apparatus associated with said device and in
rotation of said device: the combination of stabilizing 40 cluding means selectively engageable with and disengage
means carried by said one of said members for removably
able from said device for assisting the latter to effect
supporting and stabilizing said power means during oper
movements of said support member; and stabilizing means
ation thereof.
carried by one of said members for removably support
2. The construction set forth in claim 1 wherein said
ing and stabilizing said power means during operation
support member comprises an outrigger mounted for 45 thereof.
movements laterally of said housing member.
12. The construction set forth in claim 11 wherein said
3. The construction set forth in claim 2 wherein said
manually operable apparatus includes a ratchet wheel
rotatable device is mounted on said housing member.
forming part of said rotatable device and wherein said
‘4. The construction set forth in claim 3 wherein said
selectively engageable and disengageable means includes
interconnecting means comprises a ?exible element con 50 a pawl movable selectively into and out of engagement
nected at its ends to said outrigger and having a connec
with said ratchet wheel.
tion intermediate its ends with said rotatable device.
5. The construction set forth in claim 1 wherein said
References Cited in the ?le of this patent
support member includes a jack screw mounted for verti
UNITED STATES PATENTS
55
cal movements.
6. In a mobile crane or the like having a housing mem
ber, an outrigger member mounted on said housing mem
ber for movements relative thereto from a retracted posi
tion to an extended position and return, a jack mounted
on said outrigger and having a part mounted for vertical 60
movement from a retracted position to an extended posi
tion and return, portable power means, a ?rst rotatable
device associated with said outrigger member and adapted
to be driven by said power means, means interconnect
297,287
Osgood ______________ __ Apr. 22, 1884
1,883,538
2,162,257
2,365,169
2,462,926
2,663,433
2,691,450
2,733,817
Bywater _____________ .._ Oct. 18, 1932
Hoecker _____________ __ June 13, 1939
Billings ______________ __ Dec. 19, 1944
Wilson _______________ __ Mar. 1, 1949
Le Clair _____________ __ Dec. 22, 1953
Rosenbaum __________ __ Oct. 12, 1954
Course .._, ____________ .._ Feb. 7, 1956
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