US1214997A - Grab-bucket. - Google Patents

Description

E. E. BROSIUS.

GRAB BucKE.

Patented Feb. 6, 1917.

3 SHEETS-SHEET 1 E. E. BHOSIUS.

GRAB BUCKET.

APPLICATION FILED APR. 5. 1915.

1,214,997. Patented. Feb. 6,1917.

3 SHEETS-SHEET 2.

wn'NEssEs, INVENTOR mr mmm: sirens co.. Mom-uma. wAsmNcm/v. n c.

E. E. BROSIUS.

GRAB BUCKET.

APPLICATION FILED APR. 5. IsIe.

Patented Feb. 6, 1917.

WITNESSES I l I I I I I I I I I I l.

EDGAR E. BROSIUS, OF-PITTSBURGI-I, PENNSYLVANIA.

GRAB-BUCKET.

Specification of Letters Patent.

Patented Feb. ti, 1917.,

Application led April 5, 1916. Serial No. 89,052.

To all whom t may concerti.'

Be it known that I, EDGAR E. BRosrUs, a citizen of the United States, residing at Pittsburgh, Allegheny county, Pennsylvania, have invented a new and useful Improvement in Grab-Buckets, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification, in which Figure 1 is an end view of a grab bucket embodying my invention, with the bucket sections closed.

Fig. 2 is a similar view showing the. bucket in its wide open position.

Fig. 3 is a side View of the 'bucket closed.

Figs. 1 and 5 are detail views showing in side and end elevation, respectively, one of the link members, and

Fifi'. 6 is a detail view ing members.

My invention has relation to grab buckets, and more particularly to grab 'buckets of the type described and claimed in my Patent No. 1,168,279 of January 18, 1916.

The present invention is designed as an improvement upon the bucket of my said patent. In that patent I have described and claimed a grab bucket of a. type adapted to have a very wide opening. In such buckets it is highly important that effective means shall be provided for preventing end movement of the bucket sections relatively to each other. In my said patent I provided the connecting links between the lever arms of the bucket sections with guide portions which were engaged by coperating guiding sheaves or wheels. My present invention obviates the necessity of such guiding means, by so constructing the two connecting links and arranging them with respect to each other, that the links themselves exert the necessary guiding action, and effectively prevent end movement of one 'bucket section and its connected parts with respect to the other. This very considerably simplifies the construction of the bucket. The present arrangement also increases the strength of the parts and better ada-pts them to withstand the severe strains which are incident to wide opening buckets of this type.

As will appear by reference to the accompanying drawings and to my said patent, the general construction of the bucket is the same as shown and described in said patshowing the openent. In the present drawings` the numerals 2 and 3 designate the two bucket sections or scoops, each having at each end an upwardly extending long lever arm il. 7 and 8 designate the diagonal link members, each of which connects the upper end portions of one pair of the arms l with the lower portions of the other part oit said. arms. 9 and 10 designate the two ropening members pivoted together at their lower portions at 11, and each having a rope sheave 12 pivoted thereto. rllhe Lipper arm of the lever 9 is pivotally connected at 13 with a projection l-L on the link 8; and the upper arm ot the leverlO is similarly connected at 15 with a projection 16 on the link 7.

In accordance with my present invention the link 8 is of double web or slotted form (see Fig. at), thereby providing an opening therethrough through which the link 7 eX- tends, the two links being tree to move upon each other, and to exert a mutual guiding action, while at the same time restraining any movement in the direction of the longitudinal axis of the bucket. The manner in which the link 7 extends through the link 8 is indicated in dotted lines in Fig. et. The link 7 is also of the double web or slotted form shown to provide an opening therethrough for the tree movement of the projection 14 of the link 8.

The particular bucket illustrated is arranged to be operated by the two closing lines or cables 17 and the two opening lines 18. The opening lines 18 are connected rcspectively at their lower ends to the lower portions of the opening levers 9 and 10. The closing lines extend under the respective sheaves 12 and thence down and around the sheaves 19 journaled between the lower portions of the arms 4. The sheaves 19 are double sheaves, the rope or cable 17 passing downwardly under one of the sheaves 12; thence around one member of one sheave 19, thence up and across and around one member of the other sheave 19 between the opposite arms, and thence down and under and around the other member of the iirst sheave, and thence down and across to the other member of the opposite sheave, and thence under the sheave 12 and then upwardly. This gives a very powerful closing leverage upon the-arms 4 and the bucket sections. I do not, however, limit myself in my broader claims to any particular arrangement of the operating ropes or cables, since these may be arranged in various ways, using two, three or four lines.

The general operation of the bucket is the same as described in my said patent. It will also be noted that while I have changed the form of the diagonal connecting links, I am still enabled to use links in the form of rigid integral castings having long sleeve or barrel bearings at their ends. This not only provides a very strong and serviceable construction, but it also minimizes the machine work necessary in the construction of the bucket.

I claim:

l. A grab bucket comprising two bucket sections having upwardly extending long lever arms, and a link member connecting the upper portion oit the arms o1 one bucket section with the lower portions oit the arms of the other bucket section, said link members having guiding portions coacting with each other throughout the opening and closing movements of said sections to thereby act to mutually restrain the sections against relative endwise movement, substantially as described.

2. A grab bucket comprising two bucket sections having upwardly extending long lever arms, and a link member connecting the upper portion of the arms of one bucket section with the lower portions of the arms oiz the other bucket section, one of said link members passing through a slotted opening in the other link member and said link members exerting a guiding and restraining action each upon the other to prevent relative endwise movement of the bucket sections, substantially as described.

3. A grab bucket comprising two bucket sections having upwardly extending long lever arms, and a link member connecting the upper portion oit' the arms of one bucket section with the lower portions of the arms of the other bucket section, said link members having mutually engaging guiding snrfaces and each link member acting upon the other to restrain relative endwise movement ofthe bucket sections, substantially as described.

t. A grab bucket comprising two bucket sections each of which has upwardly extending lever arms, a link member connecting the upper portion of each pair of arms with the lower portion of the arms olf the other lnicket section, each of said link members having a projection and an opening lever attached to said projection, one of said link members being slotted to receive therethrough the other link member and its projectionand the last named link member being also slotted to receive therethrough the projection of the lirst named link member, substantially as described.

5. A grab bucket comprising two bucket sections each having a pair of upwardly eX- tending long lever arms, diagonal intersecting links, each oit said links connecting the upper portion of one pair of lever arms with the lower portion oit' the other pair of lever arms, a pair of opening levers pivotally connected to each other and each carrying a sheave, a double sheave mounted on each pair of lever arms, an opening line connected to each 0I" the opening members, and a closing Vline or cable passing under the sheaves on the opening members and having a double passl around said double sheaves, substantially as described.

In testimony whereof, I have hereunto set my hand.

EDGAR E. BROSIUS.

`Witnessesz GEO. B, BLEMING, GEO. H. PARMELEE.

Copies of this patent may be obtained for ve cents each, by addressing' the Commissioner of Patents, Washington, D. C.

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