Note: Descriptions are shown in the official language in which they were submitted.
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SELF-CONTAINED DE~OLITION BUCKET ATTACHMENT
Back~round of the Invention
Technical Field:
This invention relates to demolition buckets that have
hydraulically powered movable jaws that can load, grab,
and demolish structures and associated material normally
present in demolition work.
Description of Prior Art:
Prior ~rt devices of this type are characterized by
demolition shovels or buckets tbat are mounted on bulldozers
or tractors, see for example U.S. Patent 3,567,050, Patent
3J148,787, Patent 3,842,999 and a demolition bucket manufactured
by Peterson as seen on enclosed catalog sheet.
In U.S. Patent 3,567,050 a shovel is disclosed comprising
upper and lower jaws pivoted to one another with a pair of
power cylinders secured to the lower jaw for moving the upper
jaw.
Patent 3,148,787 shows a loader bucket having a clamp
pivoted to the bucket portion with power cylinders on the
bucket driving the clamp.
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U.S. Patent 3,842,999 discloses a demolition bucket
having a clamping portion pivoted to the bucket. Piston and
cylinder assemblies are provided i'or moving the clamping portion.
The Peterson demolition bucket shown in the enclosed
catalog sheet has a bucket with a pivoted cover portion with
offset arms on the bucket for moving the cover portion with
power cylinders.
Summarv of the Invention
A demolition bucket attachment that converts standard
loading buckets into demolition buckets comprises a pair O:e
movable jaws interconnected by a structural web. The attachment
includes reinforcing members and mounting plates for the
loading bucket arranged to removably secure the movable jaws
and interconnecting structural webs thereto. Piston and cylinder
assemblies are contained within each movable jaw forming a
sel~-contained movable demolition member that can easily be
moved from one bucket to another when needed.
Descri tion of_the Drawin~s
Figure 1 is a side plan view of the bucket attachment on
a loading bucket;
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Figure 2 is a front plan view of the bucket attachment
in raised position;
Figure 3 is a front plan view of the bucket attachment
in c].osed position;
Figure 4 is an enlarged cross-sectional o~ a portion of
the bucket attachment on lines 4-4 o~ Figure l;
Figure 5 is a perspective view of the bucket attachment
on a bucket in raised position; and
Figure 6 is an enlarged section o~ a portion of one o~
the jaws of the bucket attachment on lines 6-6 Oe Eigu:re 1.
DescriPtiOn O:e the Pre~erred Embodiment
A demolition bucket attachment 10 can be seen in Figures
1, 2, 3, and 5 of the drawings positioned on a loading bucket
11 which has a plurality of spaced ground engageable teeth 12
positioned along its lower portion. A body plate 13 extends
rearwardly from the teeth 12 and upwardly in a generally
U-shaped configura.tion and has oppositely disposed end panels
14 and 16 secured thereon forming the loading bucket 11.
Elongated, cross-sectionally V-shaped reinforcing members:16
and 16A extended along the opposite sides oi the body plate 13
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adjacent its upper end and ~orm a cross sectional square beam.
A pair of spaced apertured vertical mounting brackets 17
extend outwardly from the rear side of the body plate 13
to provide attachment points for a bulldozer or other
hydraulically equipped construction equipment (not shown)
as is common in the art. The bucket attachment 10 is detachably
mounted on the body plate 13 of the loading bucket 11 by two
pairs of spaced parallel upstanding plates 18 each of which is
welded to said reinforcing members 16 and 16A which extend through
an opening 60 in each plate 18, best seen in Figures 1,2 and 5 of
the drawings. The upstanding plates 18 have aligned notches 19
and aligned apertures 20. It will be evident that the pairs of
upstanding plates 18 can be positioned anywhere along the reinforcing
members 16 and 16A depending on the relative spacing required
for different size loading buckets 11 and different size
demolition bucket attachments 10.
The demolition bucket attachment 10 comprises a pair of
horizontally spaced jaws 21, each comprised of a pair of spaced
tapered arms 24 and 25 interconnected by upper and lower plates
26 and 27 continuously secured to one another along portions
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of their abutting edges. An access panel PL is removably
positioned in the upper portion of each jaw 21 allowing for
removal of the same for access to the interior of the respective
jaw 21. One end of each of the jaws 21 is larger a-t its
point of pivotal attachment to the loading bucket 11 and
tapers downwardly towards its opposite free end.
A hydraulic piston on cylinder assembly 29 with associated
hydraulic supply lines SL has a mounting boss 30 and is
positioned within each one of the jaws 21 between a pair o~
aperturecl spaced parallel brackets 31 by a fi~ed pivot pin
32 (see Figures 1, 3, and 5) which is retained between the
brackets 31 by bolts 33 in apertured circular bosses 34 on
the pivot pin 32 (see Figure 4). A piston P of the piston
and cylinder assembly 29 is pivotally secured to the jaw 21
by a fixed pivot pin 35 which is keyed within aligned bores
in spaced support blocks 36 as best seen in Figure 6 of the
drawings. The support blocks 36 are positioned transversely
between the arms 24 and 25 with a pair of spaced parallel
apertured support plates 37 extending longitudinally within
the jaw 21 providing a reinforcing load bearing structure
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within the lower portion of the jaw 21. The arms 24 and 25
are apertured at 38 (see Figure 4) to receive a ~ixed pivot
pin 39 secured to the arms 25 by bolts 40 and apertured bosses
41 that are affixed to arms 24 and 25 as by welding. Still
referring to Figure 4, a tubular fitting 42 having an outer
stepped surface 43 is positioned through and secured to the
parallel brackets 31 through which the fixed pivot pi~ 39
extends on spaced bushings 44. The pivot pins 39 and
associated brackets 31 of each jaw are pivotally positioned
in the notches 19 in the spaced parallel upstanding plates
18 and aligned so that a ~ixed pin 45 extends through said
apertured plates 18 and brackets 31, as best seen in Figures
1~ 4, and 5 of the drawings. It will be understood that each
of the jaws 21 has a piston and cylinder assembly 29 therein.
Reinforcing apertured plates 46 are secured to outer
surfaces of each of the arms 24 of the jaws 21. The horizontally
spaced jaws 21 are connected by an open frame work 47 formed
of jaw engagement plates 48, a front end plate 49 which abuts
a reinforcing beam 50 that interconnects the spaced jaws 21
and several right angularly crossed elongated plate members
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51 and 52. The plate members 51 extend transversely between
the jaw engagement plates 48 on the jaws 21 and the intersecting
cross plates 52 extend rearwardly to the front end plate 49.
The transverse plates 51 are aligned in angularly o~set
relation with the jaws 21 providing the operator a clear view
of the bucket and work. The plate members 47 also act as a
grizzly ~or limited sorting of material in the bucket as it
is moved which is advantageous when additional processing of
the material is required.
A plurality o~ replaceable jaw teeth 53 are secured in
spaced aligned relation to said rein~orcing beanl 50 so as to
be in staggered relation to said teeth 12 when the jaws 21
are in closed position shown in broken lines in Figure 1 of
the drawings.
In use, the self-contained demolition bucket attachment
10 can be easily mounted on a loading bucket 11 that has been
modified by the addition of the two pairs of spaced parallel
upstanding plates 18 positioned thereon as hereinbe~ore
described. ~he tubular fittings 42 on the fixed pivot pins
39 in the ends of the respective jaws 21 are positioned in the
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notches 19 in upstanding plates 18. The apertures in the
brackets 31 and upstanding plates 18 are aligned ~or in-
sertion of the pins 45 ef~ectively securing the demolition
bucket attachment 10 to the loading bucket 11 converting
same into a true demolition bucket with movable bucket
opposing jaws hydraulically operated by the hydraulic piston
and cylinder assemblies 29 within each of the jaws 21. The
loading bucket 11 is attached to a bulldozer or other
hydraulically equipped sel~-propelled equipment by the bucket
mounting brackets 17 in the usual manner with the hydraulic
supply lines SL extending ~rom the piston and cylinder assemblies
of the attachment to the hydraulic system o~ the construction
equipment.
It will thus be seen that a new and novel demolition
bucket attachment has been illustrated and described and it
will be apparent to those skilled in the art that various changes
and modifications may be made therein without departing from
the spirit o~ the invention, there~ore I claim:
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