US1223309A

US1223309A - Grab-bucket.

Info

Publication number: US1223309A
Application number: US87863014A
Authority: US
Inventors: William H Botten
Original assignee: Owen Bucket Co
Current assignee: Owen Bucket Co
Priority date: 1914-12-22
Filing date: 1914-12-22
Publication date: 1917-04-17
Anticipated expiration: 1934-04-17

Description

W. H. BOTTEN.

GRAB BUCKET.

APPLICATION FILED Dc.22. 1914.

1,223,309. v y Patented Apr. 17,1917.

3 SHEETS-SHEET l.

Uwe rz T01".

XW/.my WMA/'4m -wp H. BOWEN.

GRAB ucKT. kAPPLICATION FILED DEC. 22. l9l4.

1,228.309. n f Patented Apr. 17, 1917.

3 SHEETS-SHEET 2.

W. H. BOTTEN.'

- GRAB BUCKET.

. APPLICATION FILED DEc.22. |914.

1,223,309. PaIenIed Ap1-.17,1917.

3 SHEETS-SHEET a.

Wi/W i ffm UNITED satATEs PATENT OFFICE.,

WILLIAM II.y BOTTEN, OE CLEVELAND, OHIO, AssIeNOE To THE OWEN BUCKET COM- PANY, OF CLEVELAND, OHIO, A CORPORATION OE OHIO.

GEAETCKET.

To all whom z't may concern.'

Be it known that I, WILLIAM H. BOTTEN, aresident of the United States, residing at Cleveland, in the county of Cuyahoga and State of Ohio, have invented a certain new and useful Improvement in Grab-Buckets, of whichthe following isa full, clear, and exact description. f

Thisy invention relates to grab buckets which are employed orfdigging and for loading and unloading purposes, and has for its `main object to improve the construction, efficiency and durability of buckets of this type. f. e

One of the more specific objects is to improve the construction of a bucket head `by providing a head composed of a less' number oi partsy than has been required heretofore and which by reason of its `construction is durable and not liable to get out of order or interfere with the operation of the bucket and the manipulation of the holding and closing lines. Further the invention aims to provide an improved headwhich admits of a considerable yreduction in the amount of head room required, especially in the distance between the vcenter `of .the holding sheave and the centerof the fupper yclosing block. n f' A still -further Iobject is to provide improved means for supporting the bucket jaws by providing bearings which have'long life, which can be lubricated without danger of attracting sandk and other foreign particles liable to cut the bearings and bushings, and whichwill prevent the sO-called lapping y of the jaws and keep thej aw edges in alinement. y i

The above and other Objects are accom-l plished by my invention which mayl be brieiiy summarized as consisting in certainfl novel details of construction and combinafi tions and arrangements of parts whichwill be described in the specification andset forthy in the appended claims. i.

In the accompanying sheet of drawings, Figure 1 is a side View of the bucket looking toward one of the jaws, parts being in section; Fig. 2 is a similar view with the bucket turned 900, parts being in section; Fig.- l3 is a perspective view of they bucket head and some of the parts attached thereto g and Fig.`

Specification of Letters Patent.

ydesignated as a whole by the reference characterl. lThishead comprises a single or unitary' headpiece or body 14 formed in one piece, this member 14 consisting prefer` ablyiof a steel casting. The head piece is provided with4 two laterally extending portions 15', each having a pair of downwardly Patented Apr. 17, 1917. i

Application Yled. December 22, 1914. Serial No. 878,630.

extending ears 16 between which are pivoted by means of pins 17 the upper ends of the arms 12 whichextend to the outer four cornersV of the jaws. The axes of these two pivoting pins 17 which are in alinement as indicated by the line 'A-A in Fig. 4 will be yregarded as the axis of the head piece. Projecting upwardly from the middle portion of the head piece are two integral lugs or plates 18 which receive between them a holding sheave 19'which is rotatably supported between the plates or ears 18 by a pin 20 and which receives a holding line 21, one end of which is generally dead ended on a boom, andthe other end of which extends to a suitable drum. It will be observed that this sheave is at-righty angles to the axis of the 'head piece, and that the axis of the sheave is in the same vertical plane with the axis of the head piece.

Extending downwardly from the head pieoeand located between the two pairs of ears 16 upon which the arms 12 are pivoted are a series of integral lugs 22 which are arranged in parallel planes atan angle to the axis A-A of the r'head piece. In this instance I` have shown three such lugs 22 which receive between them and space apart the ksheave plates 23 'of thev .upper closing block 24, the sheave plates being connected to these lugs by a pair `of pins or bolts 25 which extend through the sheave plates and through alined openings in the lugs, these bolts and in consequence the axis of the closing block 24, being in this instance at substantially 45v to the axis of the head piece. This upper closing block 24 is in this instance provided with three sheaves 26 which receive the closing line 27. n

The head piece 14 is provided also with an integral lateral extension 14@L projecting outward from one side of the head piece in a general direction at right angles to the axis A-A. This extension, which is provided for the purpose of receiving sheaves and rollers for the closing line, includes a pair of parallel ears 28 which arein planes at right angles to the axis A--A and constitute substantial continuations of the

ears

18, 18 which receive and support thefholding sheave 19. These ears 28 receive between them and' support a pair of lead sheaves 29 for the closing line,` these sheaves being mounted upon a pair of pins 30 which extend through alined openings in the ears. The lateral extension of the head' piece is provided also with transverse ears or flanges 31 which are parallel to each other and at right angles to the ears 28, these ears or flanges 31 extending between or bridging the vertical ears 28, as shown particularly in Figs. 3 and 4. These ears or flanges 31 receive between them and support a pair of guide rollers 32 for the closing line, these rollers being mounted on pins 32a which extend into suitable openings 32b provided in the upper portions of the ears or flanges 31. It will be observed that the transverse ribs or flanges 31 not only support the rollers 32, but constitute strengthening and connecting ribsfor the vertical ears 28, thus providing the necessary strength and rigidity to answer all requirements; It will be understood that the

ribs

28 and 31 constituting the lateral extension, as above described, are all integral with the head piece 14.

The bucket closing tackle includes'in addition to the upper closing block 24 and closing line' 27 a' lower closing block 33 composed of a plurality of sheaves 34, the number of which is greater by one than the number of sheaves in the upper block. The sheaves of the lower block are spaced apart by a number of sheave plates 35 in which the sheaves 34 are supported by a pin' 36 extending, through alined openings in the sheave plates 35. The lower block is securedv to the upper part of a counterweight 37 (to which the bucket jaws are connected, as will be described), this counterweight having at the top a series of spaced lugs 38 which receive between them and' space apart the lower portions of the sheave plates 35 of the closing block 33, these sheavek plates being secured to the lugs 38 by a bolt 39 whichy passes through alined openings in the series of lugs 38 and through alined openings provided in the sheave plates. It will be observed that the lugs 38 are on an .angle tothe axis of the counterweight and that the parts of the closing cable extending between the sheaves of the upper and lower blocks and between the guide sheaves 29 and one' of the end sheaves of the lower block 33 all have clear leads. 1t will be observed also that both the holding line and that portion of the closing line which extends downwardly through the closing line guide sheaves to the end sheave of the lower closing block are in the center plane of the bucket so that the bucket will stand plumb whetherit is 'supported by the holding line or closingline.

Another important feature of my invention resides in the manner of supporting and pivotally connecting the hinges 11. Heretofore the hinges have been mounted on the ends of a` shaft or pin which in a bucketof the cou'nterweight type as here shown' extended through the counterweight. That construction, however, had the disadvantage that the bearing surfaces of the hinges were so small that wear necessitated the rather frequent replacement of the hinges. Additionally, it was found diliicult to maintainl the edges of the jaws in alinement andthe lubrication of the bearing surfaces attracted sand which cut the bearing surfaces. These disadvantages are overcome by my invention wherein the means for pivotally connecting the hinges together or to the counterweight 37 consists of two concentric members, namely, a shaft 40 to the ends of which the two hinges extending from one jaw are fastened and a sleeve 41 which is somewhat shorter than the shaft and to the ends of which the' other two hinges are fastened'. Both the shaft and the sleeve extend through the counterweight, the shaft and sleeve having a suitably close working lit on each other, and the sleeve having a suitably close working lit in' the counterweight. The opening in the counterweight is preferably recessed at two points, as shown at 42, this being provided for 'the purpose of reducingfthe length of the bearing surface of the sleeve and counterweight and for lubricating purposes. The recesses are preferably filled with a semi# solid ylubricating substance, and additionally grease cups 43 may be provided to supply lubricant to these recessed portions. In orderthat lubricant may find its way from these recesses on to the inner bearing surfaces of the sleeve and shaft, the sleeve is provided with a number of lubricatingA openings 44.

By yfastening the two pairs of' hinges rigidly to the two long relatively movable members, one of which has a bearing in the other and both extendingthrough the counterweight very good bearings are provided forl these parts throughout the lifey of the bucket, and there is practically no danger ot the bucket jaws lapping or getting out of alinement as was heretofore the case it one corner of the bucket jawsy would close on a rock or other hard substance. Additionally, bylubricating the bearing surfaces from what may be termed the interior of the structure, such a small percentage of the lubricant gets on the outer hinging parts that sand and grit will notbe attracted to .any material extent and cut the bearings.l

While I have shown only the preferred construction I do not wish to be coniined to the exact details shown, but yaim in my claims to cover all modifications which d'0 not involve a departure from the spirit of my invention.

Having thus described my invention, what I claim is l. A head-piece for a grab bucket comprising a central portion provided with laterally extending arms each having. downwardly extending ears, and said central portion vprovided with a pair of upwardly extending ears; and with downwardly extending ears symmetrically arranged with respectk to said upwardly extending ears.

2. A head-piece comprising an enlarged central portion provided with laterally extending arms each having downwardly extending ears, and said central portion provided also with `upwardly extending ears adapted to support a holding sheave, with downwardly extending ears adapted to support a closing sheave; and with a third set of ears extending laterally from the middle portion said last setk of ears being adapted to support guide-members for a closing line.

3. A head-piece for a grab bucket having laterally extending arms each of said arms being provided with a 'pair ofdownwardly extending ears, the said pairs of ears being arranged symmetrically with respect to the center of the head; a pairk of upwardly extending ears arranged at substantially the center of the head and adaptedy to support a `closing sheave; downwardly projecting ears arrangedat substantially the center of the head and adapted to support a closing block; and a pair of laterally extending ears at right angles with respect to the arms for supporting guides for a closing line.

4C. A head-piece for a grab bucket having laterally extending arms to which bucket supporting arms are adapted to be connected; a plurality of ears extending downwardly from the head at the central portion thereof, said ears being arranged at an angle with respect to the longest axis of the head; a pair of upwardly extending ears arranged at substantially the center of the head and Aadapted to support a holdino' sheave; and

laterally extending ears which are substantially in line with the ears that support the holding sheave, said laterally extending ears adapted to receive a member which guides a closing line. Y

5. A head-piece for a grab bucket having anenlarged central portion from which extend lateral arms each of said arms being provided with a pair of downwardly extending ears adapted to support bucket n downwardly from the enlarged portion of the head, said ears serving to support the closing block; a pair of ears extending upwardly from the. enlarged portion of the head said ears serving to support a closing, sheave, all said arms and ears being symmetrically arranged with respect-to the central vertical axis of the head.

'7. A head-piece for a grab bucket having an enlarged central portion; arms extending from the said central portion for supporting bucket arms; a means extending downwardly from the4 enlarged portion of the head and serving to support a closing block; a means extending upwardly from the enlarged portion of the head and serving to support a holding line; and means for supporting guides for a closing line comprising ears extending laterally outward Jfrom the central portion and adapted to support guide rollers, and additional ears at right angles to and extending between the first named ears and adapted to support other rollers.

8. 'In a bucket. the combination with bucket jaws and jaw supporting arms of a bucket head comprising a one-part headpiece having a middle portion; arms projecting laterally outwardly in the direction of the main axis of the head-piece said bucket-supporting arms being connected to said arms of the head-piece; parallel ears extending upwardly from the head-piece at right angles to said axis; a holding sheave rotatably supported between said ears; ears extending downwardly from the head-piece and arranged in parallel planes at an angle to thesaid axis said downwardly extending ears being directly beneath the upwardly extending ears; a closing block supported by said downwardly extending ears; a closing cable reaved about the sheaves of said bleek; ears Aprojecting laterally from the Closing line supported by said last lmennlcldle portion of 'the head-piece and sub- 'tioned-ears. Y

stantially in `line with said upwardly proln testimony whereof, I'hereunto siliix my jecti'ng ears; lead pulleys for the closing signature in the presence of two witnesses. 5 line supported between said laterally pro- VIDLIAM H. BOTTEN.

jecting ears; additional ears extending be- Witnesses: tween and at right angles t0 said laterally A. F. Kwis, projecting ears; land guide rollers for the L. I. PORTER.

Copies of l'this patenttmay be obtained for ve cents ea`ch, by-a1ddressing the"-Co1`nmissoner ofPate'ts, Washingtn/Dc.