US1415663A - Rotary plow - Google Patents

Description

c. L. LILLE'BERG..

ROTARY PLOW. APPLICATION m51) luNEzs. 19u.

Patented May 9, 1922.

UNITED STATES PATENT OFFICE.

CHARLES L. LILLEBERG, OF CHICAGO, ILLINOIS.

ROTARY PLOW.

Specification of Letters Patent.

Patented 'May 9,1922.

Application filed June 28, 1917. Serial No; 177,479.

ful Improvement in Rotary Plows, of which the following is a full, clear,vconcise, and exact description.

My invention relates to rotary plows and has for its object an improvementl in the construction and arrangement of the cutting ele-A ments thereof.

The invention in all of its characteristics will be fully described by reference to the accompanying drawing showing the pre-V ferred embodiment thereof and in which Fig. 1 is a perspective view illustrating certain characteristics of construction; Fig. 2 is a detail perspective view illustrating one of the plow shares; and Fig. 3 is a view illustrating a set of plow shares that desirably operate in the same plane.

Like parts are indicated by similar characters of reference throughout the different gures.

The drum 74 is co-axialwith and is de'- sirably fixed upon the suitably driven shaft 16. This drum or rotatable support carries a plurality of sets of plow shares orknives 75.

The stems of the plow shares are assembled upon the radial supports 76 by means of the bolts 77. The bases 78 of the radial supports 76 are quadrants that are in the nature of shoes which fit upon the drum 74 and are fastened thereto by means of bolts 79. The shares or knives 75 are, as shown, angularly formed, the angularly related portions of each knife being desirably at right angles with respect to each other to" present a right angle cutting edge 80. Each knife, as a whole, rotates in a vertical plane (the plane of rotation of drum 74) and the four knives of each set operate in the same plane. The sets of knives are arranged in serial order transversely of vthe plow and along the drum 74. The swath cut by each set of knives is adjacent the swaths cut Aby the adjacent sets of knives. The outer angular ends of the knives, extending transversely of the plow, determine the width of the swaths. The inner radial cutting portions of the knives separate or cut apart the adjacent swaths. The adjacent sets of knives are in staggered relation so that the swaths out bythe adjacent and staggered-knivesv of adjacent sets are commenced sequentially and finished sequentially. The four knives of each set together cut fourtaperng ribbons in each revolution of the drum 74, one

ribbon 81 per knife, these ribbons lgenerally breaking as they form.` The top broad 'face of each of these 'ribbons is cut by one of these four knives and the bo-ttom broad face of this ribbon is cut by the succeeding one of these four knives, the thickness of the ribbon vbeing determined by the advance which the plow has made between the cutting of these two broad faces of the ribbon. The angular portion of each knife terminates at the planel of operation of the radial portion of the preceding knife so that each knife co-operates with each succeeding knife incutting a ribbon of soil, such succeeding knife completing the cutting of this ribbonv of soil. Reference may be had to the division of this application Ser. No.` 282,282, filed March 13, 1919. 2

While I haveherein shown and particu- .larly described the preferred embodiment of my invention, I do not wish to be limited to the precise details of construction shown as changes may readily be madewithout departing from the spirit of my invention, but having thus described my invention I claim as new and desire to secure by Letters Pat,- ent the following:

A plow structure including a rotary plow element having a rotatable support; and a plurality of staggered sets lof plowl knives carried by said supportthe knives of each set operating substantially in the same plane which is the plane of rotation of said support, saidknives'having outer angular endsy sol extending transversely ofthe plow strucv ture, and substantially parallel with the axis of ysaid rotary plow element, the end portions of the knives of each yset terminating at the plane of rotation of the inner portions of the knives of the adjacent set, the cutting edges of said knives extending along .their angular ends and being continued from their angular ends along their radial portions.

In witness whereof, I hereunto subscribe my name this twenty-third day of June A. D., 1917.

CHARLES L. LILLEBERG.

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