US2384957A

US2384957A - Bulldozer tooth

Info

Publication number: US2384957A
Application number: US576517A
Authority: US
Inventors: Murphy Joseph Clyde
Original assignee: Individual
Current assignee: Individual
Priority date: 1945-02-07
Filing date: 1945-02-07
Publication date: 1945-09-18
Anticipated expiration: 1962-09-18

Description

2 Sheets-Sheet l I J. c. MURPHY BULLDOZER TOOTH Filed Feb. 7, 1945 Sept. 18, 1945.

m m. W Y Y m I H u A M W 95 .I M 1 Y m w w 9% J w h m mi w o L 0 EU 0 o o VHUU o o o M n m n U .FJ QILMHU m U m m m m n wt P 1945- J. c. MURPHY 2,384,957

BULLDOZER TOOTH Filed Feb. '7, 1945 2 Sheets-Sheet 2 Inventor By QMmZz-M and Wavy fiMg meted Sept..18, 1945 usurso- STATES PATENT 4 OFFICE.

one-half to Paul Weaver, Frannie, W

Application February 7, 1945, Serial No. 578,517 2 Claims. (262- 8) Hie present invention relatesgenerally to that v class of grading machines known as bulldozers and more particularly to an improved bulldozer tooth.

One of the principal objects of the invention is to provide a bulldozer tooth which may be quickly attached to any bulldozer blade and moldboard for the purpose of breaking, shale, rock, frost or other material too hard for aconventionai bulldozer blade to penetrate.

.Another object of the invention resides in the provision of a device of this character which is readily adjustable on the bulldozer blade and moldboard, which may be used without injury to said blade and moldboard, and which may be conveniently carried on the frame of the bulldozer for immediate .use, thus eliminating the need for heavy trailing equipment.

A further object of the invention is to provide a bulldozer tooth which is simple in construction,

highly efficient in use, and which maybe manufactured in quantity at low unit cost.

Other objects of the invention, not specifically mentioned hereinabove, will become apparent as th description proceeds.

In the drawings forming a part of my applica= tion:

Figure 1 is. a front elevation of a bulldozer moldboard and blade equipped with a pair of the teeth forming the subject matter of my invention, said teeth being shown in dotted lines in alternate positions. l'lg'ure 2 is an enlarged detail plan view showing the adjustable mounting for the upper end of the tooth.

Figure 3 is a side elevation of my invention in proper position on the moldboard and blade.

Figure-4 is a perspective view of the invention. Referring now more particularly to the drawings, wherein similar reference numerals will be used to designate like parts, the numeral i indi cates generally a bulldozer moldboard which is of conveniently to receive the upper and lower edges of the blade 2 so that said blade will eflectively 'retain the lower end of the tooth in proper operative position on the moldboard.

Within the recess 1 the body is notched, as at 8, to receive a brace 9 which extends transversely at each side of said body and tends to prevent rocking of the tooth on the moldboard i. Similarly, the rear edge of the body 4 is notched medially of its length, as shown at iii, to receive a brace I i which provides further bracing against 'rockingmovement of the tooth.

As best seen in Figure 4 of the drawings. the

' 2 and 3, adjustably mounts the tooth on the conventional construction and which is provided b at its lower edge with a hardened steel blade 2. The moldboard shown is of arcuate cross-section. The improved bulldozer tooth iorming the subject matter of my invention is indicated gener Y ally at I and includes an arcuate elongated body 4 which terminates at its lower end in a forwardly curved point 5. The rear edge of the lower end portion ofthe body terminates in a heel 8, and,

directly above said heel said body is notched to define a recess 1. As best seen in Figure 3, the

moldboard. More specifically, the clamping plate it'is formed with 9. depending lip II which is undercut obliquely, as at it, to engage the rear edge of the moldboard i. A set screw [1 is threaded through an opening. which communicates between th forward end of the-plate II and the slot it, so that its inner end ensazes the front face of the shank i2. Tightening of the .set screw will urge the body 4 into tight engagement with the moldboard I so that the tooth 8 will be limited against accidental displacement.

A look nut is is carried on the screw i1 and is tightened for securing said screw in an adjusted position. v

In Figure 1, I have shown two of mybulldozer' teeth in position on a moldboard. It should be understood, however, that as many teeth as desired may be used. The teeth may be moved to diiferent positions on the moldboard I, or removed entirely therefrom, by simply loosening the screw I! for relieving pressure on'the shank 12.

My improved bulldozer tooth has proven particularly eifective for digging close to vertical banks, which operation cannot be accomplished by trailing rooters. Moreover, the invention has proven highly successful when used for breaking shale, frost, rock, hardpan and other substances too hard for an ordinary bulldozer blade topene trate.

Itshould be understood that various modiflcations may be made in the invention without departing from the spirit thereof. For example,

the body I will have to be made in diflerent sizes and slightly different shapes to conform to differupper and lower walls of the recess are shaped 55 cut makes and sizes ofbulldozers.

board, and a clamping plate engageable with l0 the shank tor mounting the tooth on a bulldozer moldboard.

2. As a new article 01' manufacture, a bulldozer tooth comprising an elongated arcuate body terminating at one end in a. sharpened point, said body being formed at its upper end with a reduced aqua-red shank and with a recess medially of the length of its rear wall, and a brace carried in the recess.

JOSEPH CLYDE MURPHY.