US3532234A

US3532234A - Scoop attachment for a demolition machine and the like

Info

Publication number: US3532234A
Application number: US744024A
Authority: US
Inventors: Louis A Grant
Original assignee: Individual
Current assignee: Individual
Priority date: 1968-07-11
Filing date: 1968-07-11
Publication date: 1970-10-06
Anticipated expiration: 1987-10-06

Description

Oct. 6, 1976 4 L. A. GRANT 3,532,234

SCOOP ATTACHMENT FOR A DEMOLITION MACHINE AND THE LIKE Filed July 11, 196e 2 sheets-sheet 1 L. A. GRANT Oct. 6, 1970 scoop ATTACHMENT FOR A DEMOLITION MACHINE ANDTHE LIKE Filed July 11, 1958 2 Sheets-Sheet 2 United States Patent O 3,532,234 SCOOP ATTACHMENT FOR A DEMOLITION MACHINE AND THE LIKE Louis A. Grant, 7886 Saltsburg Road, Pittsburgh, Pa. 15239 Filed July 11, 1968, Ser. No. 744,024 Int. Cl. E02f 3/30 U.S. Cl. 214-138 S Claims ABSTRACT F THE DISCLOSURE I disclose a scoop attachment for a demolition machine and the like `having a movable iboom structure, said attachment comprising a pivoted boom section, bearing and pivot means secured to each end of said boom section and extending generally axially thereof, the pivot portion of each of said bearing and pivot means being displaced laterally of the longitudinal axis of said pivoted boom section, a scoop member, means for pivotally joining said scoop member to the associated one of said bearing and pivot means, and an extendible and retractable linkage connected between said pivoted boom section and said scoop member, said linkage being displaced laterally of said pivot portion.

The present invention relates to excavating and demolition means and more particularly to a scoop or bucket attachment actuating means therefor for use with a demolition machine or the like.

Although my invention is described primarily in connection with demolition machines for use in cleaning soaking pit furnaces and the like, it will be apparent as this description proceeds that my invention is of general utility, and can be used for example with various types of excavating machines. For this reason at least a portion of the

linkages

52, 54 are enclosed within the

tubular boom sections

30, 16 respectively. Pivotal movement of at least the outer linkage 52 is limited by its associated boom section 30, as evident from FIG. 1. In particular, my invention is described for use wtih demolition machines described and claimed in my co-pending application, entitled Demolition Machine tiled Sept. 22, 1966, Ser. No. 581,273 and now U.S. Pat. No. 3,458,396.

The importance and ditculty involved in removing the hardened debris from soaking pit furnaces and the like have been described in detail in my aforementioned pending application. In many such soaking pit furnaces the oor structure thereof is provided with a bottom opening for removing the debris. The demolition machine such as described in my aforementioned co-pending aplication, can be manipulated to push chunks of debris through the opening after the debris has been broken up by the machine. However, this delays removal of the demolition machine from the soaking pit and I have lfound that the scoop attachment describde herein is much Imore eiicaceous in sweeping the broken up debris into the pit furnace opening.

Other types of soaking pit furnaces have no bottom opening, and the debris, after it has been broken up by the demolition machine, must be removed through the top opening of the soaking pit.

My demolition machine as disclosed in the aforementioned application obviously canont be used for removing debris through the top soaking pit opening. The scoop attachment disclosed herein is admirably suitable, however, for this purpose. The scoop attachment, in one example thereof, is arranged for connection to the demo;- lition machine in place of its demolition tool and cradle. My novel scoop attachment is arranged for convenient CFI 3,532,234 Patented Oct. 6, 1970 JCC manipulation within the space limitations imposed by the contines of most soaking pits.

I am aware of course of a number of scoop arrangements which are presently known in the art. Most of these arrangements are limited range and maneuverability. Those known scoop arrangements which do permit some degree of maneuverability, typified for example by the U.S. patent to Przybylski No. 3,003,649 are of bulky construction and are therefore incapable of proper manipulation within the confines of a soaking pit furnace.

In particular, the upwardly projecting components of the Prybylski structure would interfere with the charging crane normally used for soaking pit operations and usually allowing only about 38 inches of clearance above the pit.

I overcome these disadvangtages of the prior art by providing a readily maneuverable scoop arrangement for use with demolition machines and the like, particularly in closely confined quarters such as within a soaking pit furnace. My novel scoop arrangement can be furnished if desired, in the form of an attachment for the aforcmentioned demolition machine or for other types of excavating equipment. The scoop attachment is particularly useful in connection with a demolition machine or the like having an extendible boom structure. Its maneuverability is effected through the use of novel and relatively simple mechanical connections which require a minimum of space for operation.

I accomplish these desirable results by providing a scoop attachment for a demolition machine or the like having a movable boom structure, said scoop attachment comprising bearing and pivot means secured to the outer end portion of said boom structure, said bearing and pivot -means being shaped so that the pivot portion thereof is displaced slightly laterally of said boom structure, a pivoted boom section having bearing and pivot means joined to each end thereof, each of said last-mentioned bearing and pivot means having a pivot portion displaced laterally of said pivoted lboom section, means for pivotally joining one of said last-mentioned bearing and pivot means to said first-mentioned bearing and pivot means, a scoop member, means for pivotally joined said scoop member to the other of said second-mentioned bearing and pivot means, and extendible and retractable linkages connected between said boom structure and said pivoted boom section, and between said pivoted Iboom section and said scoop member at positions laterally displaced from said pivot portions respectively.

I also desirably provide a similar scoop arrangement wherein at least one end of said linkages is secured to the associated one of said boom structure and said pivoted boom section adjacent the longitudinal axis thereof.

I also desirably provide a similar scoop arrangement wherein said pivoted boom section is of tubular configuration, said boom structure includes a tubular section to which said rst-mentioned bearing and pivot means are joined, and said linkages are secured respectively to mounting members within said boom section.

I also desirably provide a scoop attachment for a demolition machine and the like having a movable boom structure, said attachment comprising a pivoted boom section, bearing and pivot means secured to each end of said boom section and extending generally axially thereof, the pivot portion of each of said bearing and pivot means being displaced laterally of the longitudinal axis of said pivoted boom section, a scoop member, means for pivotally joining said scoop member to the associated one of said bearing and pivot means, and an extendible and retractable linkage connected between said pivoted boom section and said scoop member, said linkage being displaced laterally of said pivot portion.

During the foregoing discussion, Various objects, features and advantages of the invention have been set forth. These and other objects, features and advantages of the invention together with structural details thereof will be elaborated upon during the forthcoming description of certain presently preferred embodiments of the invention and presently preferred methods of practicing the same.

In the accompanying drawings I have shown certain presently preferred embodiments of the invention and have illustrated certain presently preferred methods of practicing the same, wherein:

FIG. 1 is a side elevational view of one arrangement of scoop attachment in accordance with my invention;

FIG. 2 is a top plan view of the apparatus as shown in FIG. l; and

FIG. 3 is a schematic fluid circuit diagram of components added to the circuit of FIG. 8 of the aforementioned copending application for the purpose of operating my novel scoop attachment, when the latter is utilized with the demolition machine disclosed in such application.

Referring now in greater detail to FIGS. 1 and 2 of the drawings, the exemplary scoop attachment 10 shown therein is arranged in this example for use with an extensible boom structure 12, which can be similar to that illustrated in FIGS. 4 and 7 of the aforementioned application. In this example, boom structure 12 includes telescoping sections 14, 16 shown in their withdrawn condition. The outward end of the inner boom section 16, which in this example is of square tubular configuration, is provided with a pair of bearing plates 18, each of which include an outwardly extending arm and bushing 22. The plates 18 are Welded or otherwise secured to the sidewalls of the inner boom section 16. A pair of narrower bearing plates 24 are similarly joined to the underside of the inner boom section 16 (as viewed in FIG. 1) and are secured at their outer ends to a single bushing 26. The respective openings in the

bushings

22, 26 are aligned for insertion of pivot pin 28.

An intermediate boom section 30 is pivotally joined to the

bearing plates

18, 24 in place of the demolition tool cradle and demolition tool depicted in my aforementioned application. The boom section 30 is pivoted to the outer extremities of the

bearing plates

18, 24 by a pair of support arms 32, as better shown in FIG. 2, joined in this example to the underside of the pivoted boom section 30. The support arms 32 likewise can be welded to the underside of the pivoted boom section 30, as viewed in FIG. 1, and are inserted respectively between the outer bushings 22 and the adjacent inner bearing plates 24 as better shown in FIG. 2. In order to accommodate passage of the pivot pin 28 each of the arms 3-2 is provided with a suitable aperture 34 adjacent its outward extremity.

The pivoted boom section 30, in this example, can also be of square tubular configuration, and desirably is strengthened by a transverse supporting plate 36 secured within the pivoted boom section 30, as by welding, at a position adjacent the arms 32. The stabilizing plate 36 serves also to support eye brackets 38, 40` which are secured to opposite sides of the stabilizing plate 36 as shown. The eye brackets 38, 40 atford points of attachment for the operating linkages described below.

The other, outward end of the pivoted boom section 30 terminates in this example in a total of four bearing plates 18', 24 and associated linkages 22', 26 which are, in this example, similar to the bearing plates and bushings described above in connection with the outward end portion of the inner boom section 16. The bearing plates 18', 24', however, are arranged to support pivotally a scoop or bucket 42, which is provided with a pair of cooperating bearing plates 44 for this purpose, as shown in FIG. 2. In this example the buckets bearing plates 44 are generally of triangular configuration and are stabilized by an intermediate gusset plate 46 and by a pair of outer gusset plates 48. The

gusset plates

46, 48 desirably are welded to the respectively adjacent surfaces of the scoop 42 and the scoops bearing plates 44. Adjacent corresponding apieces of the buckets bearing plates 44, suitable apertures 50, are formed to accommodate pivot pin 28 as better shown in FIG. 2. The buckets bearing plates 44 are also spaced to intertit with the outer bushings 22 and adjacent bearing plates 24 of the pivoted boom section 30.

The scoop 42 and the pivoted boom section 30 are actuated respectively by piston and cylinder arrangements denoted generally by

reference characters

52, 54. In this example the scoop cylinder 52 is connected between the aforementioned eye bracket 40 and pivoted apertures 56 formed in this example in other apieces of the scoop bearing plates 44 and therefore spaced from the pivoted apertures 50. Extension and retraction of piston rod 58 therefore pivots the scoop 42 between the positions denoted by the solid outline thereof in FI-G. 1 and chain outline 60` thereof.

The maneuverability of the scoop 42 is further extended by manipulation of piston and cylinder 54 which is connected between eye bracket 38 of the pivoted boom section 30 and eye bracket 62 on support plate 64 of the inner boom section 16. In this example extension and retraction of piston rod 66 moves the pivoted boom section 30 and the bucket 42 between their solid outline position of FIG. 1 and the chain outline position 68 thereof.

When my novel scoop attachment 10 is used in connection with the demolition machine of my aforementioned co-pending application, the tool cradle cylinder 94 shown in FIGS. 2 and 8 of that application may take the place of the piston and cylinder 54 described herein. In such case the cylinder 54 (FIGS. 1 and 2) can be operated by the fluid circuit of FIG. 8 of the aforementioned application. The cylinder 52 can be similarly operated with the additions to the aforementioned FIG. 8 as shown in FIG. 3 herei-n. Thus, an additional solenoid valve 70 can be aded to the valve stack 152 of the copending application (FIG. 8) and an additional holding valve 72 coupled between the solenoid valve 70 and the scoop cylinder 52 From the foregoing it will be apparent that novel and efficient forms of scoop attachments have been disclosed herein. The scoop attachment 10 is capable of considerable maneuverability with a minimum of component parts. In particular, such maneuverability is accomplished without the use of bulky linkages and connections protruding transversely of the boom and scoop structure 12-16-30-42. In consequence, my novel scoop attachment 10 can be operated with a high degree of maneuverability within severely limited spaces encountered when the aforementioned demolition machine or the like is employed in connection with a soaking pit furnace or the like. To minimize the lateral protrusions of the scoop attachment 10 and associated components of the boom structure 12, the pivot axis of the pivoted boom section 30 and of the scoop 42 are displaced relatively short distances laterally of the inner boom section 16 and of the pivoted boom section 30. Such displacement permits the actuating cylinders 52-54 to be operated adjacent the longitudinal axes of the inner boom section 16 and of the pivoted boom section 30. In this respect, the left ends (as viewed in FIGS. 1 and 2) of the piston and cylinders arrangements 52-54, are pivoted respectively adjacent the aforementioned longitudinal axes. The cylinder pivots are sufciently close to the open ends of the

boom sections

16, 30 that the piston and

cylinder arrangements

52, 54 can pivot during their normal operation without contacting the adjacent side walls of the

tubular sections

16, 30.

While I have shown and described certain presently preferred embodiments of the invention and have illustrated presently preferred methods of practicing the same, it i's to be distinctly understood that the invention is not limited thereto but may be otherwise variously embodied and practiced within the scope of the following claims.

I claim:

1. A scoop attachment for a demolition machine or the like having a movable boom structure, said scoop attachment comprising bearing and pivot means secured to the outer end portion of said boom structure, said bearing and pivot means being shaped so that the pivot portion thereof is displaced laterally of said boom structure, a pivoted boom section having second bearing and pivot means joined to each end thereof, each of said second bearing and pivot means having a pivot portion displaced laterally of said pivoted boom section, mea-ns for pivotally joining one of said second bearing and pivot means to said tiret-mentioned bearing and pivot means, a scoop member, means for pivotally joining said scoop member to the other of said second bearing and pivot means, and extendible and retractable linkages connected between said boom structure and said pivoted boom section, and between said pivoted boom section and said scoop member at positions laterally displaced from said pivot portions respectively, at least one end of said linkages being secured to the associated one of said boom structure and said pivoted boom section substantially at the longitudinal axis thereof.

2. The combination according to claim 1 wherein said first-mentioned bearing and pivot means are substantially identical to that one of said second bearing and pivot means which are pivoted to said scoop member, so that said scoop member can be alternatively attached to either of said identical pivot means.

3. A scoop attachment for a demolition machine or the like having a movable boom structure, said scoop attachment comprising bearing and pivot means secured to the outer end portion of said boom structure, said bearing and pivot means being shaped so that the pivot portion thereof is displaced slightly laterally of said boom structure, a pivoted boom section having bearing and pivot means joined to each end thereof, each of said last-mentioned bearing and pivot means having a pivot portion displaced laterally of said pivoted boom section, means for pivotally joining one of said last-mentioned bearing and pivot means to said first-mentioned bearing and pivot means, a scoop member, means for vpivotally joining said scoop member to the other of said second-mentioned bearing and pivot means, and extendible and retractable linkages connected between said boom structure and said pivoted boom section, and between said pivoted boom section and said scoop member at positions laterally displaced from said pivot portions respectively, said pivoted boom section being of tubular configuration, said boom structure including a tubular section to which said iirst-mentioned bearing and pivot means are joined, and said linkages being pivoted respectively to mounting means within said tubular boom sections, said linkages being at least partially enclosed within their respective tubular sections.

4. The combination according to claim 3 wherein at least one end of said linkages being secured to the associated one of said boom structure and said pivoted boom section substantially at the longitudinal axis thereof.

5. The combination according to claim 3 wherein at least said pivoted tubular section limits the pivotal movement of its associated linkage.

6. The combination according to claim 2 wherein said identical bearing and pivot means include a plurality of spaced, axially extending bearing plates terminating in a transverse array of spaced bushings, and the other of said second bearing and pivot means and said scoop member pivot means each include a number of bearing plates interitted between the associated ones of said bushings.

7. A scoop attachment for a demolition machine and the like having a movable boom structure, said attachment comprising a tubular pivoted boom section, bearing and pivot means secured to each end of said boom section and extending generally axially thereof, the pivot portion 'of each of said bearing and pivot means 'being displaced laterally of the longitudinal axis of said pivoted boom section, a scoop member, means for pivotally joining said scoop lmember to the associated one of said bearing and pivot means, and an extendible and retracta'ble linkage connected between said pivoted boom section and said scoop member, the adjacent end of said linkage being pivoted within said pivot portion, substantially at its said longitudinall axis, so that said linkage is at least partially enclosed therein.

8. The combination according to claim 7 wherein Said pivoted boom section limits the pivotal movement of said linkage.

References Cited UNITED STATES PATENTS 2,754,985 7/1965 Przyblyski 214-138 2,984,373 5/1961 Przybylski 214-141 3,024,920 3/1962 Sundin 212--35 HUGO O. SCHULZ, Primary Examiner U.S.Cl.X.R.

UNITED STATES PATENT OFFICE CERTIFICATE OF CGRRECTION Patent No, 3,532,234 October 6, 1970 Louis A. Grant It is certified that error appears in the above identified patent and that said Letters Patent are hereby corrected as shown below:

Column 1, line 58, "describde" should read described line 52, after "machine" insert a comma. Column 2, line. 12, "Prybylski" should read Przybylski line 42, "joined" should read joining e- Column 4, line 2, "apieces" should read apices line 37, "aded" should read added 1ine 40, after "S2" insert a period.

Signed and sealed this 6th day of April 1971.

(SEAL) Attest:

EDWARD M.FLETCHER,JR. WILLIAM E. SCHUYLER, JR. Attesting Officer Commissioner of Patents