U.S. patent number 3,677,417 [Application Number 05/098,394] was granted by the patent office on 1972-07-18 for mounting assembly for installation of hydraulic jacks on outrigger.
This patent grant is currently assigned to Grove Manufacturing Company. Invention is credited to Joseph H. Keller, Jr., Russell L. Sterner.
United States Patent |
3,677,417 |
Keller, Jr. , et
al. |
July 18, 1972 |
MOUNTING ASSEMBLY FOR INSTALLATION OF HYDRAULIC JACKS ON
OUTRIGGER
Abstract
A mounting assembly for installing a hydraulic jack on the end
of a box-beam type outrigger wherein a flanged collar, welded to
the lower end portion of the jack cylinder, is bolted to flanges on
the bottom wall of the outrigger, and a C-plate encircling the
medial portion of the jack cylinder and bolted to flanges on the
top wall of the outrigger thereby clamping the hydraulic jack in a
substantially vertical position with respect to the outrigger.
Inventors: |
Keller, Jr.; Joseph H.
(Hagerstown, MD), Sterner; Russell L. (Greencastle, PA) |
Assignee: |
Grove Manufacturing Company
(Shady Grove, PA)
|
Family
ID: |
22269092 |
Appl.
No.: |
05/098,394 |
Filed: |
December 15, 1970 |
Current U.S.
Class: |
280/766.1 |
Current CPC
Class: |
B66C
23/80 (20130101) |
Current International
Class: |
B66C
23/00 (20060101); B66C 23/80 (20060101); B66c
023/62 () |
Field of
Search: |
;212/145
;248/188.8,230 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Blunk; Evon C.
Assistant Examiner: Maffei; Merle F.
Claims
We claim:
1. A mounting assembly for connecting a vertically disposed
hydraulic jack on the end of a horizontally disposed box-beam type
outrigger for stabilizing a lift load comprising, a flanged collar
integrally connected to the jack cylinder, first U-shaped flange
means open on its outer end connected to the outrigger side walls,
bolt means connecting the flanged collar to the bottom surface of
the first flange means and bottom wall of the outrigger, whereby
when the jack is extended to the operative position the lift load
is transferred to the jack through the flanged collar; second
U-shaped flange means open at its outer end integrally connected to
the top wall of the outrigger, clamping means substantially
encircling said jack cylinder, and bolt means securing said
clamping means to the top surface of the second flange means, to
thereby clamp and maintain the jack at a substantially vertical
attitude and to relieve the flanged collar bolt means from bending
loads due to side sway of the outrigger.
2. A mounting assembly according to claim 1 wherein the flanged
collar is welded to the jack cylinder in proximity to the end
thereof through which the piston rod extends.
3. A mounting assembly according to claim 1 wherein said clamping
means comprises a C-plate disposed around the jack cylinder
substantially intermediate the ends thereof.
Description
Heretofore attempts have been made to secure a vertically disposed
hydraulic jack on the end of a horizontally disposed outrigger by
merely welding the jack cylinder to the end of the outrigger. This
method has proven unsatisfactory due to the distortion or weakening
of the jack cylinder wall by the heat generated during the welding
operation, thus weakening the resistance of the jack to the
stresses and strains incurred during the lifting of heavy
loads.
To overcome the problems experienced by welding the jack directly
to the cylinder, it has been proposed to enclose the jack in a
housing consisting of telescopic sections, the inner section being
secured to and enclosing the outwardly projecting portion of the
piston rod, and the outer section enclosing the cylinder. The outer
section is welded to the end of the outrigger and the closed end of
the cylinder is bolted to the closed end of the outer section.
While this arrangement overcame the problems incurred by welding
the jack directly to the outrigger, it was subject to certain
objections in that the housing for the jack added substantially to
the weight carried on the end of the outrigger, and the size of the
housing restricted the length of the outrigger which might be
employed. Furthermore, this arrangement made it difficult, if not
impossible, to replace a defective jack on the job side.
To overcome the disadvantages experienced in hitherto employed
outrigger jack mounting assemblies, the mounting assembly of the
present invention has been devised which comprises, essentially,
forming the bottom and top walls of the outrigger with flanged,
bifurcated portions for receiving the cylinder of the jack. A
flanged collar is welded to the jack cylinder wall in proximity to
the sealed end through which the piston rod projects and a C-plate
is positioned around the medial portion of the jack cylinder wall.
The flanged collar and C-plate are bolted to the flanged,
bifurcated portions of the bottom and top walls, respectively, of
the outrigger to thereby mount the hydraulic jack in a
substantially vertical position with respect to the outrigger. By
this construction and arrangement, the lift load is transferred to
the jack through the flanged collar which is the only element
welded to the jack cylinder wall, the C-plate merely clamping the
jack to the outrigger to maintain the jack in a substantially
vertical position, and to relieve the flanged collar mounting bolts
from bending loads due to side sway of the machine being
supported.
IN THE DRAWINGS
FIG. 1 is a fragmentary side elevational view of the mounting
assembly of the present invention connecting a hydraulic jack to
the end of an outrigger;
FIG. 2 is an end elevational view of the assembly illustrated in
FIG. 1;
FIG. 3 is a top plan view of the assembly illustrated in FIG.
1;
FIG. 4 is a view taken along line 4--4 of FIG. 1;
FIG. 5 is a view taken along line 5--5 of FIG. 1; and
FIG. 6 is a view taken along line 6--6 of FIG. 1.
Referring to the drawings, and more particularly to FIGS. 1 and 2,
the mounting assembly of the present invention, designated
generally by reference numeral 1, is shown connecting a hydraulic
jack 2 to the end of a box-beam type outrigger 3. The outrigger is
of a conventional design and includes a bottom wall 4 and a top
wall 5 rigidly interconnected by side walls 6 and 7. The outrigger
is transversely mounted on the machine 8 to be supported, which
might include a mobile crane, back hoe, scaffolding, and the like,
and is adapted to be slidably actuated outwardly therefrom by a
fluid motor 9. While FIG. 1 shows only one outrigger and associated
jack, it will be understood by those skilled in the art that at
least two pairs of outriggers are customarily employed, the
outriggers in each pair extending in opposite directions from the
machine to be supported. Thus, outriggers 10, in FIG. 2, extends in
the opposite direction from outrigger 3. Since the mounting
assembly of the present invention is identical for connecting each
jack to its respective outrigger, only one of the mounting
assemblies will be described.
As will be seen in FIGS. 1, 2 and 6, a flanged collar 11 is welded
to the outer surface of the jack cylinder wall in the vicinity of
the sealed end through which the piston rod extends. This area of a
hydraulic jack is customarily provided with a conventional seal
assembly 2a which includes packing, seals and a sleeve for guiding
the piston rod in the cylinder. By welding the flanged collar at
this location on the jack its cylinder wall does not incur any
distortion from the heat generated during the welding operation.
The bottom wall 4 of the outrigger is formed with an arcuate edge
4a (FIG. 5) to conform to the cylinder wall of the jack and the
side walls 7 extend outwardly beyond the bottom wall to thereby
form a bifurcated portion for receiving the hydraulic jack. A pair
of flanges 12 and 13 are integrally connected to the outrigger side
walls 6 and 7, respectively. The collar 11 is provided with thru
holes 14, adapted to register with thru holes 15 formed in flange
12, thru holes 16, adapted to register with tapped holes 17 formed
in the bottom wall 4, and hole 18, adapted to register with tapped
hole 19 formed in flange 13.
Referring to FIGS. 3 and 4 the top wall 5 of the outrigger is
provided with an arcuate edge 5a to accommodate the jack cylinder;
thus, the top wall 5 and associated side walls 6 and 7 form a
bifurcated portion, similar to the bottom wall and side walls, for
receiving the jack, a recess 5b is also formed in the arcuate edge
to accommodate the fluid connections to the jack. The end portion
of the top wall 5 is provided with a pair of outwardly extending
flanges 20, 21 formed with apertures 20a and 21a respectively as
will be seen in FIG. 3, a C-plate 22 is adapted to encircle the
jack cylinder in a direction opposite to that of the arcuate edge
5a, the plate engaging the cylinder wall substantially intermediate
the ends thereof, as shown in FIG. 2.
To assemble the jack on the end of the outrigger, the jack is
positioned substantially vertically and inserted into the
bifurcated portion of the outrigger afforded by the arcuate edge 4a
of the bottom wall, arcuate edge 5a of the top wall and the
associated side walls 6 and 7. The flanged collar 11 is positioned
on the bottom surfaces of the flanges 12 and 13 and bottom wall 4
and secured thereto by suitable bolts 23 extending through the
aligned holes 14, 15; 16, 17; 18, 19 as described hereinabove. The
jack is now rigidly mounted in a substantially vertical position,
and in order to maintain the attitude assumed by the jack secured
to the bottom wall of the outrigger, the C-plate is positioned
around the cylinder and clamped to the flanges 20, 21 by bolts 24.
The holes formed in the C-plate, through which the bolts 24 extend,
are initially formed as undersized holes so that prior to clamping
the plate to the flanges 20, 21, the holes in the C-plate are first
aligned with the holes in the flanges and then drilled to a
sufficient diameter to accommodate the bolts 24. By this
construction and arrangement any variations in the vertical
alignment of the jack may be accommodated.
It is contemplated that a pair of C-plates will be provided for
each mounting assembly so that if a jack, replacing a defective one
on the job site, is vertically aligned in a slightly different
attitude than the original jack, as determined by its connection to
the bottom wall of the outrigger, the vertical alignment will be
accommodated by a second C-plate having undersized holes which are
then drilled to register with the holes in flanges 20 and 21.
From the above description it will be readily apparent to those
skilled in the art that the mounting assembly of the present
invention provides a novel arrangement for connecting a jack to a
box-beam type outrigger wherein the lift load is transferred to the
jack through the flanged collar 11, which is the only element
welded to the jack cylinder. The C-plate 22 clamps and maintains
the jack at a substantially vertical attitude, determined by the
position assumed by the jack when secured to the flanges 12 and 13,
the C-plate 22 also relieving the flanged collar mounting bolts 23
from bending loads due to side sway of the machine being
supported.
It will also be appreciated that the mounting assembly of the
present invention materially reduces the weight disposed at the end
of the outrigger, and the relatively few parts required in the
assembly reduces the cost of fabrication, conserves lateral space
for the outriggers and facilitates the replacement of a defective
jack at the job site.
The terms and expressions which have been employed herein are used
as terms of description and not of limitation, and there is no
intention, in the use of such terms and expressions, of excluding
any equivalents of the features shown and described or portions
thereof but it is recognized that various modifications are
possible within the scope of the invention claimed.
* * * * *