US1503866A

US1503866A - Toothed cutter lip

Info

Publication number: US1503866A
Application number: US473370A
Authority: US
Inventors: Howard G Washburn; Lafayette G Johnson; Joseph R Thill
Original assignee: American Manganese Steel Co
Current assignee: American Manganese Steel Co
Priority date: 1921-05-28
Filing date: 1921-05-28
Publication date: 1924-08-05
Anticipated expiration: 1941-08-05

Description

Aug. 5, 1924. 1,503,866

H. G. WASHBURN ET AL TOOTHED CUTTER LI P Filed y 28. 1921 Patented Aug. 5, 1924.

UNITED STATES PATENT, on-ics.

nowm e. WASHBUBN, LAFAYETTE e. JOHNSON, am) Josnnrn. 'IEILL, or FLAT RIVER, MISSOURI, ASSIGNOBS TO AMERICAN IANGANESE STEEL COMPANY, OF

CHICAGO, ILLINOIS, A CORPORATION OF MAINE.

Application filed Kay 28,

To allwhom it may co'rwem:

Be it known that we, HOWARD G. WASH- BURN, LAFAYE'ITE. G. JOHNSON, and Josnrn R. THILL, citizens of the United States, residing at Flat River, in the State of Missouri, have invented certain new and useful Improvements in Toothed Cutter Lips, of which the following is a specification.

Our invention relates to diggin buckets or dippers, and has particular re erence to a cutting lip therefor. v

The invention relates to a cutting lip for excavating machines, which may be used with such excavating apparatus as steam shovel dippers, ladder dredge buckets, clam shell buckets and the like, and where reference is made hereinafter to digging buckets all of'the' above are to be understood as included broadly in this term. 1

An object of our invention is to provide a cutter lip for digging buckets which is formed from a single casting and in which there are formed digging teeth, or points,

7 with reinforcing lips and a web construction between the points for the purpose of strengthening the lip.

Another object of our invention is to provide a cutter lip for digging buckets havin digging teeth formed therein.

i further object of our invention is to provide a tooth digging or cuttin lip, of the described character, in which t e teeth are connected by webs for eliminating breakage.

A still further object of the invention is to provide a cutter 11p having digging teeth or points integrally formed and in which there is used a web construction for connecting the teeth to aid in distributing strain over the lip whenever obstructions are encountered in digging.

A still further object is to improve cuttin lips for digging buckets for successful commercial use.

The above and other objects will be apparent from the following specification and drawings, and will be particularly pointed out in the appended claims.

In the drawings Fig. 1 is a top plan view of the preferred embodiment of the invention.

1921. seria mo. 473,310.

Fig. 2 is a vertical section taken .on line 2-2 of Fig. 1. V

Fig. 3 is a rear end view of the arrangement of Fig. 1.

Fig. 4 is a transverse section on line 4-4 of Fig. 1. i

Fig. 5 is a transverse section on line 5-5 of Fig. 1.

Fig. 6 is a side elevation looking at the left-hand end of Fig. 1.

Fig. 7 is anenlarged fragmentary view showing the preferred construction of bolt holes, and Fig. 8 is a section taken on line 88ofFi .1. i

The re erence character 10 designates generally the toothed cutter lip of our invention. As shown, the lip comprises an upper surface 11 which is secured to a digging bucket of any well known form and shape. Bolt holes 12 are provided through which bolts, rivets or similar means may be emplo ed to fasten the lip to a bucket. At each side of the lip there are upstanding side portion 13-14 for preventing lateral displacement of the lip when secured to a bucket and wearin service. Forwardly of the flat surface 11 is What may be termed the digging portion of the lip. Referring to Figs. 4, 5 and 6 of the drawing, it will be noted that the digging portion is inclined downwardly, forming a cutting ed e. Extendinglongitudinally of the lip,t at is, in the direction of the digging movement,-there are formed a plurality of ribs 15 which are cast with the lip, the forward ends of which ribs are pointed as at 16 in Fig. 4. The pointed portions of the ribs are in efiect digging teeth or points. i

For strengthening the digging portion of the lip webs 17 are cast connecting the several ribs 15 and side portions of the lip. The front edges of the webs are sharpened or pointed as at 18 in Fig. 5 so that the whole digging front of the lip is pointed or sharpened for purposes well understood.

In Fig. 7 there is disclosed countersunk and counterbored holes for the reception of rivets or other attaching means. We'prefer to employ bolt holes of this character so that the li may be securely fastened to the dipperbo y and so that the rivets or other the outer or wearing surfaces of the ribs.

Our construction improves digging lipsfor use with digging buckets by casting the digging point or teeth integrally with the lip, and by providing connecting webs between the teeth, the lip is strengthened and the likelihood of a tooth being broken in service is eliminated. Furthermore, by relieving the cutting edge,that is, by the novel point and web construction of the invention, as shown in the drawings,-digging is made easier than if a plain or straight lip were used. Furthermore, by provision of the longitudinally extending ribs, the front ends of which form the digging teeth, the lip is stren hened and reinforced considerably. urthermore, digging strains are distributed throughout the whole casting.

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

e claim:

1. A one-piece cutter lip for digging buckets having a plurality of longitudinally extending ribs spaced apart on its under side and terminating in pointed digging teeth at their forward ends.

2. A one-piece cutter lip for digging buckets having a plurality of longitudinally extending ribs spaced apart on its under side and terminating in downwardly inclined digging teeth at their forward ends.

3. A one-piece cutter lip for digging buckets having upstanding side portions and a plurality of ribs spaced apart between said side portions and parallel therewith, and terminating in digging teeth at their forward ends.

4. A one-piece cutter lip for digging buckets having a plurality of longitudinal ribs spaced apart and connected by webs to form a substantially fluted underside, and

said ribs terminating in digger points at their forward ends.

5. A one-piece cutter lipfor digging buckets having a plurality of longitudinal ribs spaced apart and connected by Webs and forming a fluted underside, said ribs being pointed to form digger points at their forward ends, and said webs being sharpened at their forward ends.

Signed at Flat River, Missouri, this 28th day of April, A. D. 1921.

HOWARDG. WASHBURN. LAFAYETTE G. JOHNSON. JOSEPH R. THILL.