US1453813A - Dipper front - Google Patents

Description

May 1, 1923. v E. E. VANDERHQEF; DIPPER FRONT Filed oct. 29. 1926 Patented May 1, 1923.

UNITED STATES ELLISON EDWARD VANDERHOEF, OI? JEROME, ARIZONA, ASSIGNOR TO AMERICAN MANGANESE STEEL COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF MAINE,

, DIPPER FRONT.

Application filed October 29, 1920. Serial No. 420,554.

To aZZ whom z't'may concem:

Be it known that I, ELLI'soN EowAnD VAN- nnnnonr; a citizen of the United-States, residin at Jerome, in the'county of Yavapai and tate of Arizona, have invented certain new and useful Improvements in Dipper Fronts. of which the following is a specification.

My invention relates to fronts for clippers for excavating, dredging and similar machines, and more particularly to fronts for dippers formed in a single piece from cast metal, referably manganese steel.

-An 0 ject of my invention is to provide a single. piece cast metal front fora dipper having a perfectly smooth interior portion and a plurality of ribs formed integrally therewith extending longitudinally of the frontand cast on the outside of the front.

Another object of the invention is to pro vide a cast metal dipper front for dredge buckets and the like having the cutting edge reinforced to increase the life of the bucket, the reinforcing consisting in extending the edge of the bucket beyond the seats for the dipper teeth.

Another object. is to form a cast metal dipper front having the cutting edge spread or flared outwardly to aid'in d1ggingoperations and to keep the bucket against the material being dug.

A further object isto provide a cast metal front for clippers the interior-of which is smooth, and with reinforcing ribs on the outside, with provision of means for additional reinforcement as occasion. demands. A still further object is to -improve the construction of cast metal dipper fronts for successful commercial use.

Generally speaking, I carry out my inven tion by forming a dipper front of cast metal having a smooth interior, preferably of manganese steel, with the cutting edge flared or spread out at such an angle that will aid in digging. The cutting edge is provided with recesses which serve as seats for ,theldip er points, and I contemplate using reversile' dipper points in connection with the cast metal front embodying this invention. The above and other objects of my invention will be apparent from the drawings, .wherein Figure .1 is a side elevational view partially in section, showing a front constructed in accordance with the preferred form of the invention; I

Figure 2 is a front elevational view of the dipper front, showing .two dipper tooth 5 and, as usual, comprises the front portion with upstanding wings or side portions 5 whichmay be secured by rivets or other fastoning means to the body. In the drawings, I. have provided a plurality of rivet holes 6 for securing the front to the dipper body. As will be observedfrom the drawings, the inside of the front of the dipper is smooth, that is, there are no ribs nor shoulders on the dipper tooth points, nor other projections to catch dirt as the bucket is subjected to use.

It is possible to discharge completely a bucket having a smooth interior leaving no refuse whatsoever in the bucket. The dig- 'ging lip of the bucket is spread or flared in order to form a digging or cutting lip which will aid in directing the bucket into engagement with the material being dug.- I

have found that if the lip is spread about 10 degrees it will be suflicientfor most purposes.

The edge of the cutting lip of the bucket is provided with a plurality of recesses 7 in line with the ribs 8 formed on the outside surface ofthe front wall of thebucket. The

recesses 7 are for the purpose of serving as seats for dipper tooth points 9, which, in the form shown, are of the reversible type. The usual construction of reversible tooth points contemplates a web 10 joiningthe rearwardly extending jaws of the'points to serve as means for preventing sidewise play of the points in service. To' accommodate the. webs 10 of the points the ribs fiare recessed at 11 rearwardly ofthe seats 7' and' suitable apertures 12 are provided which register with apertures in the jaws of the dipper tooth, so thatrivets 13 or other fastening means may pass through these apertures for securing thedipper teeth in place.

To receive the jaws 9 of the dipper teeth, the tops and bottoms of the upper ends of the ribs 8 are recessed at 18 to permit the outer surfaces of the jaws to lie flush with the ribs. Shoulders or stops 19 are formed -toabut the rear ends of the jaws 9* to relieve the rivets from digging strains.

In order to reinforce certain portions of dipper fronts made in accordance with this invention, whenever found desirable l have provided means for attaching such reinforcements. These means include a plurality of rivet or bolt holes 14' passing through the ribs 8 of the dipper front, through which These large buckets are used on very long. booms and dipper sticks, so that it is diffi- -cult to secure the correct digging angle without rubbing the heel of the front, causing uneven wear on the outer surface thereof.

WVith a construction such as herein described, it is possible to prolong the life'of a dipper front for the larger type of dippers and at the same time dig as efficiently with the present type of bucket. In fact, digging with a bucket equipped with the front of my invention, it is possible to load and unload buckets faster, as the smooth interior prevents accumulation of dirt therein and the spread digging lip serves to direct the bucket into the material, rather than to direct it away from the digging,

By extending the'digging lip beyond the seat of the digging point, it is possible to prolong the life of a bucket over that of the ordinary character, as excessive wear is ex perienced at the edges of the upper corner of the front and oftentimes these corners become worn, thus weakening the fronts and making necessary the employment of a new front. In dipper fronts wherein the digging edge lies back of the seats for the dipper points, the corners wear much faster, rcsulting in the discarding of dipper fronts much sooner than otherwise would be neces sary. \Vhere manganese steel is used in the manufacture of these fronts, the cost is very high, so that any means which. makes possible the prolongation of the life of a dipper front of manganese steel is important. By my invention I have found that a dipper front made in accordance therewith outlasts a dipper front of the ordinary kind many times, consequently the benefits to be derived from the use of such a construction are readily apparent.

While I have described'more or less precisely the details of construction of my invention, I do not wish to be understood as limiting myself thereto, as I contemplate changes in form and the proportion of parts and substitution of equivalents as circumstances may suggest or render expedient, without departing from the spirit of my invention.

I claim: i

1. A single piece cast metal front for excavatingdippers having a plurality of lon gitudinally extending ribs formed integrally therewith and-on the outer surface of thefront, said ribs having seats at the upper ends thereof whereby a series of detachable dipper teeth may be secured to the ribs, the cutting edge of the front extending beyond said seats and being notched whereby said dipper teeth may lie flush with the ribs, and means for securing said teeth in place on said seats.

2. A dipper having a cast metal front, said front having a smooth surface on the inside of said dipper to permit complete discharge of said dipper, the other side of said front being provided with reinforcing ribs, said front having a cutting edge portion, said edge portion being recessed on the inside surface of said front 'and teeth mounted in said recesses in alignment with said rcinforcing ribs. 3. A dipper having a cast metal front, said front having a smooth surface on the inside of said dipper to permit complete discharge of said dipper, the outside. surface of said front having a plurality of longitudinally extending ribs, said ribs having recessed seats at the upper ends thereof and 'a series of detachable dipper teeth mounted in said seats and secured to said ribs, the cutting edge of the front extending beyond said seats.

4, A dipper having a cast metal front, said front having a smooth surface on the inside of said dipper to permit complete discharge of said dipper, the outside surface of said front' having a plurality of longitudi I nally extending ribs, said ribs having recessed seats at the upper ends thereof, said front on its inside surface being provided with recesses communicating with said recessed seats, and a series of detachable dipper teeth secured to said ribs in said seats and recesses, the. cutting edge of the front extending beyond said seats.

Signed at Jerome, Arizona, this 14th day .of Sept, 1920.

ELLISON EDWARD VANDERHOEF.

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