US2948346A - Plow bottom - Google Patents

Description

Aug- 9, 1960 R. H. sHEPPARD 2,948,346

' PLow BOTTOM Filed Aug. 29, 1956 2 Sheets-Sheet 1 INVENTOR Aug. 9, 1960 Filed Aug, v29, 1956 R. H. SHEPPARD PLOW BOTTOM 2 sheets-sheet 2 IN NTOR Haz/m0 HJSEPPAHU PLOW BOTTOM Richard H. Sheppard, 101 Philadelphia St., Hanover, Pa.

Filed Aug. 29, 1956, Ser. No. 606,926

4 Claims. (Cl. 172-754) This invention relates to plows and has for its principal object the provision of a plow bottom, the various members of which cooperate -to produce a unit with a high operating eiciency More specifically, it is one object of the invention to provide a frog of great sturdiness having a bottom plate integral with boththe landside and the moldboard engaging portions.

A further object is to provide a plow share which will minimize such wear as would tend to produce the socalled sleigh runner elect, that is, to cause wear of the type sloping the lower surface of the point so that as the plow bottom is towed it will tend to rise rather than follow the level set -by the usual mechanism.

A further object is to provide a unitary point and share which is readily removed or replaced from above while the bottom is resting upon the earth, obviating the necessity for reaching under the plow bottom to get at nuts.

A still further object is to provide a' calk or cleat on the bottom of the share at the corner of the share away from the cutting edges and at the rear of the landside face of the share, this calk protecting the forward end of the landside, holding the landside against the frog and acting as a deiiector of small stones that might be caught below the share. One face of the triangular calk is smooth, abutting and protecting the' forward slanting face of the landside bolted to both the shank and the frog. The share is kept quite thin to allow scouring to sharpen the cutting edges to a small acute angle so that when the cutting edges are worn to the full extent, only about half of the share is thrown away as against three-fourths or more in many popular types of shares.

In the drawings:

Figure 1 is a side elevation.

Figure 2 is a perspective of the share.

Figure 3 is an edge view of the share.

Figure 4 is a bottom plan of the share.

Figure 5 is a bottom plan of the frog and associated parts.

Figure 6 is a perspective, looking at the bottom of the frog.

Figure 7 is a perspective of frog and land.

Figure 8 is a vertical section taken through the front of the plow.

The plow bottom 1t) is carried by a sloping vertical shank 11 which is bolted to the frog 12 and carries a brace 15 bolted to the moldboard 16 at 17. The landside 18 is bolted to the frog in usual manner. The share 20 is of the type having an integral blade and plow point with an initial forward cutting edge 21, and an elongated wing cutting edge 22 merging with the short cutting edge by a Curved breaker edge 23. The shin piece 25 is ush with the moldboard 16 and the share. The upper relatively flat face 26 of the share which follows the contour of the shin and moldboard is broken by an elevated portion 27 to alford the necessary thickness to receive screws 28 and 29 threaded into the frog as are screws 32 and 33. The frog 12 is of novel conw Ifiguration having a flat integral bottom 35, a curved mold'- board (and shin piece) plate 36` and a vertical landside plate 37, the former having a forwardly extending tongue to receive the screws 28 and 29 and to support the front of the share. The top edge of the curved moldboard plate 36 extends up to the margin of the moldboard, and the top edge of the vertical landside plate slopes from the moldboard slightly downwardly, making a right angle with the sloping rear of the landside plate which is the rear member of the frog. These two plates make an angle of about 50 and constantly separate from the top down and merge with the Ybottom plate of the frog.

'I'he share 20 has a short rear at face 38 in line with the rear ofthe moldboard. A strap 39- near this is no needl to turn the plow upside down to obtain access to the nuts on the` usual bolts.

In order to minimize the sleigh runner eicct of older shares the front of the sha-re slopes both upwardly from the bottom and still more downwardly from the top to form the initial cutting. edge 21. At the junction of the front point of the shin piece 25, the corner of Vshare 20, and' the front face of landside 18, the share carries on its bottom a calk 40 about the shape of a threel sided pyramid, the pointed Vbottom of which is the lowest point of the plow as bestl seen in Figs.Y 3 and 4, The rear face 41 of the calk snugly engages and protects the frontv face of the landside, their engaging faces sloping downwardly and forwardly. When the plow bottom encounters a stone about the size of a baseball, the calk or heel will urge the plow bottom above the stone or 4because of the slope of the calk will urge the stone landward and away from the landside. With the construction illustrated there is no tendency of stones to roll into a recess between the point face, the frog forward edge and the front of the landside.

The frog 12 is shown upside down in Figure 5. The integral bottom 35 imparts considerable strength and is conveniently provided with an opening 44 for convenient access to the nut on nearby bolt 46 which passes thru the landside and the frog and the shank, and also to the nut on bolt 47 securing the moldboard to the frog. It is preferred that the bottom plate 35 shall be materially shorter than landside plate 37 and that the curved moldboard plate 36 extend about equally farther back. A lug 48 extending from landside plate 37 receives a bolt 49, securing shin 25 to the frog, bolts 53 and 54 also aiding in securing these parts together. The holes 50 and 51 vertically positioned in the landside plate of the frog receive bolts securing this plate of the frog to the shank. As best seen in Figure 6, the angle between the frog bottom and the bottom face 52 of the landside is about 10 and the forward sturdy nose of the frog extends considerably beyond the straight margin of the frog underlying the share, the nose aiming directly at the forward cutting edge 21 of the share.

What I claim is:

1. A frog having a curved moldboard engaging plate, a vertical landside engaging plate, and a horizontal bottom plate extending from the lower margin of the landside engaging plate integral with both the moldboard engaging plate and the landside engaging plate, said bottom plate terminating short of the rear margins of the moldboard engaging plate and of the landside engaging plate, and having a forward tongue adapted to underlie a plow point to strengthen same.

2. A plow share comprising an elongated relatively Y Patented Aug. 9,1596

flat body member having Vat one long side a wing cutting edge, having at the opposite long side a narrow at face adapted to engage an edge of a moldboard, said share having a rear face sloping to match the moldboard, a forward cutting edge at an angle to said long side cutting edgerand merging therewith by a curved breaker cutting edge, a sloping short face extending from the forward cuttingedge to the moldboard engaging flat face, a downwardly extending curved calk of three-sided pyramid shape at the junction of the said sloping short face and said moldboard engaging face, one face of the calk forming an abutment to protect the forward edge of a landside, another face of the calk curving along the short face to the forward cutting edge and the third face of the calk forming a portion of said sloping short face.

3. In a plow bottom, the combination with a frog having a horizontal bottom plate, of a vertical landside secured to the frog and having a bottom face sloping downward from front to rear at an angle of about ten degrees, a thin elongated share secured to the frog, having a forward cutting edge, a wing cutting edge, a curved breaker edge and a downwardly extending triangular calk at a corner of the share away from said cutting edges, the cutting edges being sharpened to an acute angle and the forward cutting edge being directed downwardly at a slight angle to overcome the tendency of the plow point to rise, said calk protecting the forward end of the landside and having a rear face tending to hold said forward end against the frog.

4. In a plow bottom, the combination of a frog having a moldboard engaging plate, a landside engaging plate, and a bottom plate integral with both the moldboard engaging plate and the landside engaging plate, said bottom plate extending at right angles to the landside engaging plate and having a share reinforcing tongue as an integral extension of the forward end of the bottom plate; a landside bolted to the frog and having a forward face at a point short of the tip of said forword- 1y extending tongue; and an elongated share having a relatively flat body member'with a cutting edge at one long side and having atthe opposite side a Hat face adapted to engage a moldboard, said share having a forward cutting edge merging with the long side cutting edge vby a curved breaker cutting edge, said share being secured to the frog to overlie said tongue and having a at face engaging the at face at the forward end of the landside; said share having a downwardly extending three-sided calk atV the junction of the share and the landside, one face of the calk forming said flat face ofv the share, another face of the calk sloping'to urge a stone in a direction away from the landside, and a third face sloping upwardly toward the point of the share.

References Cited in the le of this patent UNITED STATES PATENTS 348,652 Anderson Sept. 7, 1886 724,315 Moody Mar. 31, 1903 921,532 Fischer et a1. May 11, 1909 1,091,788 Altgelt et al. Mar. 31, 1914 2,038,492 VJessop Apr. 21, 1936 2,347,167 Baker Apr. 25, 1944 2,467,289 Beckstrom Apr. 12, 1949 2,486,637 Eksergian NOV. 1, 1949 2,529,435 Warholoski Nov. 7, 1950 2,557,588 Ba-ker June 19, 1951 2,622,502 Altgelt Dec. 23, 1952 2,674,173 Wheeler Apr. `6, 1954 2,690,112 Frevik Sept. 28, 1954 2,724,317 Zwaska Nov. 22, 1955 FOREIGN PATENTS I 4,165 Australia Nov. 22, 1932

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