US1909850A - Dipper tooth - Google Patents

Description

May 16, 1933. L. E. YOUNIE 11,909,850

DIPPER TOOTH Filed Feb. 12, 1931 2 Sheets-Sheet 1 \\Q ZZ ATTUFZ/VE/ Patented May 16, 1933 UNITED STATES PATENT OFFICE E. YOUNIE, OE PORTLAND, OREGON, ASSIGNOB "1'0 ELECTRIC STEEL FOUNDRY COMPANY, OF PORTLAND, OREGON DIPPER TOOTH Application filed February 12, 1881. Serial No. 515,183.

Dipper teeth are subjected to great strains and to very severe wear. It has been common, therefore, to make these teethof material, such as manganese steel which is very diflicult, in fact, practically impossible to relation to material that will stand wear.

With the present invention a very simple construction is provided which may be readily fabricated and which may be conveniently and securely assembled. In addition to this the tooth point as formed is reverslble and this is accomplished without added ex ense so far as the structure is concerned. Ot er features and details of the invention will appear from the specification and claims.

A preferred embodiment of the invention is illustrated in the accompanying drawings as follows Fi 1 shows a portion of a fragment of a lip o a dipper on which teeth are arranged.

Fig. 2 a perspective view of a tooth with a vertical arrangement of the cutting edge of the tooth.

Fig. 3 a section on the line 3-3 in Fig. 1.

Fig. 4 a section on the line H in Fig. 1.

Fig. 5 a central vertical section through a tooth and a portion of the lip.

Fig. 6a section on the line 6-6 in Fig. 5.

Fig. 7 a side elevation of an alternative construction of tooth.

Fig. 8 an end view thereof.

The base of the dipper tooth 12 has the usual rforated shank 10 and is provided at its ront end with a point-securing projection 11 preferably having the shape of a truncated pyramid. The base has the usual upper lip forming a slot 13 between this 11p and the shank 10 into which the lip, or edge 14 of the dipper extends, the dipper being provided with the usual walls 15 and the tooth being secured with the usual rivets 16. The base is provided with the vertically extending key opening 17 and with a horizontally extending key opening18 and also with an axially extending opening 19; The tooth point 20a of the tooth in the ordinary form has the chisel cutting edge with inclined faces 2020 extending therefrom and the side faces 21. It is provided with a socket 22 having a form correspondin to and adapted to receive the tapered proiection 11. It is also provided with an axial y extending shank 23 which is adapted to extend into the opening 19. The shank is provided with a key opening 24 and the shank is preferably four-sided and adapted to enter the opening 19. The key opening 24 is so placed that wlth the oint assembled the openings 17 or 18 will be approximately in register with said openin 24; A ke 25 is driven and through the opening 24, the off-setting of the opening 24-being such that as the key is driven home strain is put on the shank and in consequence the walls of the socket 22 are seated in wedging enga ement with the walls of the pro'ectlon 11 so t at the point is rigidly secure on the base. The parts of the point, projection and shank, overla each other and thus strengthen the connection between the point and the base.

It will be noted that the point may be reversed so as to more effectively use it as it wears, or it may be set at 90 usin the opening 18 with the key, thus placin t e point in the position shown in Fig. 2. fihus a point fully reversible, or adjustable, as to four positions is provided without any added cost as to fabrication.

In Fig. 8 a tooth point of pyramidal form is shown having side faces 28.

What I claim as new is 1. In a dipper tooth, the combination of a base and a point, one of which has an axiall extending tapered projection and the other a tapered socket receiving the projection, the point having an axially extending shank and the base an axially extending opening receiving the shank, the shank having a key opening and the base having key openings set at 90 arranged to register with the key opening of the shank in any position of the shank; and a key in the opening locking the point in place.

2. A dipper tooth base having a tapered projection and an axially extending opening I in the base extending through the projection, said base having two key openings at right angles to each other extending through the axially extending opening.

5 3. In a dipper tooth, the combination of a base and a point, one of which. has an axially extendi'ngf tapered 4 projection {having sur rounding converging side walls having an mclination to the axis of less than 45 and the 10 other" having a tapered socket having surrounding converging side walls receiving the projection, the point having an axially extending shank and the base an axiallyrextending opening receiving the shank; and means engaging the shank securing the point onthe base.

" 4.1111 a dipper tooth, the combination of a base and a point, the base having an axially extending tapered projection having sur-.

1 0 rounding. converging side walls having an inclination to the axis of less than 415 and the point having "a tapered socket having surro'unding converging side walls receiving the projection, the point having an axially extending shank and the base an axially extending opening receiving the shank; and "means engaging the shank securingthe point "on the base.

5. A dipiper tooth point having a cutting .39 edge at its ront; a projection-receiving sock- "et at its rear, said socket having surround- ;ing converging side walls having an inclination-to the axis of less than 45; and an axially extending shank extending from the base of the socket.

6. A dipper tooth base having a tapered projection having surrounding converging side walls having an inclination to the axis of less than 45; and an axially extending opening in the base extending through the projection.

In testimony whereof I have hereunto set my hand.

LEWIS E. YOUNIE.

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