US1688771A - Digging implement - Google Patents

Description

Oct. 23, 1928. 1,688,771 L. E. YOUNIE DIGGING IMPLEMENT Filed Dec. 18, 1926 4/ g MW e INVENTOR.

ATTORNEYS.

i atented Got. 23, 1928 LEWIS EDWARD YOUNIE, OF LA FAYETTE, CALIFORNIA.

DIGGING IMPLEMENT.

Application filed December 18, 1926. Serial No. 155,663.

Ordinarily digging implements, such as trenching machines, power shovel dippers, and similar devices have teeth secured to the digging edges of these implei'nents, the cutting edges of the teeth usually projecting in front of the digging edge of the digging receptacle. I have found that the action of such teeth may be improved by placing the teeth to the rear of th digging edge, this improving the digging action and simplifying the attachment of the teeth to the receptacle. Features and details of the invention will appear from the specification and clain'is.

The invention is illustrated in the accompanying drawings as follows z- Fig. 1 shows a perspective view of a trenching machine bucket With teeth according to the invention in place thereon.

Fig. 2 a side elevation, partly in section, of a digging edge with a tooth in place thereon.

1 marks the digging receptacle which as shown is connected with the carrying chains 2 of a trenching machine and 2 a boom along which the digging implements are carried as commonly. The digging receptacle 1 has a digging edge, or lip 3.

A number of tooth carriers t are secured to the digging edge. Each carrier has a hook end 5 hooking over the front edge of the receptacle and is secured in place by rivets, or bolts 6. The rear end of the carrier is pro vided with a downturned extension 7 which is provided with a perforation 8. A tooth 9 has a shank 10 extending through the perforation and a cotter pin-11 extends through the rear end of the tooth looking it in the perforation. The tooth so mounted reduces the metal necessary for the tooth to a minimum, provides a means by which the teeth may be readily exchanged and the teeth sharpened but the functional operation of the teeth positioned as in this invention improves the operation of the digging implement tending to hold the receptacle to its work without undesirably tilting the receptacle so that it may be used in very hard and difficult material with success.

VJ hat I claim as new is 1. In a digging implement, the combination of a receptacle having a digging edge; tooth carriers on the underside of the receptacle; and a tooth at the rear of the edge secured to the carrier, said tooth being downwardly and forwardly inclined.

2. In a digging implement, the combination of 'a receptacle having a digging edge; tooth carriers on the underside of the receptacle and having down-turned extensions at their rear ends; and teeth having shanks secured in the extensions.

3. In a digging implement, the combination of a receptacle having a digging edge; tooth carriers on the underside of the receptacle and having do-wnturned perforated extensions at their rear ends; and teeth having shanks extending into the perforations.

4. In a digging implement, the combination of a receptacle having a digging edge; tooth carriers on the underside of the receptacle and having down-turned perforated extensions at their rear ends; teeth having shanks extending into the perforations; and means at the rear of the extensions looking the shanks in the perforations.

5. In a digging implement, the combination of a receptacle having a digging edge; tooth carriers on the underside of the receptacle, said carriers having a hook hooking over the edge; and teeth at the rear of the edge secured to the carriers.

6. In a digging implement, the combination of a receptacle having a digging edge; tooth carriers on the underside of the receptacle, said carriers having hooks engaging the edge and having down-turned extensions at their rear ends; and downwardly inclined teeth secured to the extensions.

In testimony whereof I have hereunto set my hand.

LEWIS EDWARD YOUNIE.

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