US1230846A - Plow. - Google Patents

Description

l. C. BOHMKER.

PLOW. APPLICATION FILED FEB. 25' 19!]- Patented June 26; 1917.

%mn-mv//////////A UNITED STATES PATENT OFFICE.

JOHN C. IBOHMKER, OF BRADLEY, ILLINOIS, ASSIGNOR TO SEARS, ROEIBUCK AND COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OIE NEW YORK.

PLOW.

7 Application filed February 26, 1917.

To all whom it may concern:

Be itknown that I, JOHN C. BOHMKER, a citizen of the United States, residing at Bradley, in the county of Kankakee and State of Illinois, have invented certain new and useful Improvements in Plows, of which the following is a specification.

.The object of this invention is to provide a plow having a share secured in place by meanswhich permits the share to be quickly attached and detached.

In the accompanying drawings, Figure 1 is a perspective View of a plow embodying the features of my invention, the view being taken from a point behind the plow. Fig. 2 is a perspective view of the plow looking from a point beneath the plow. Fig. 3 is a fragmental view of the frog, landside and moldboard. Fig. 4 is a perspective View of the share. Fig. 5 is a fragmental detail view. Fig. 6 is a detail view of an alternative construction. Fig. 7 is a plan view of a modified construction for tensioning the securing straps. Fig. 8 is a side elevation of the modified structure.

In the drawings, 1 is the plow body or frog, to which the beam (not shown) is attached. 2 is the moldboard and 3 is they landside. The moldboard and the landside are secured to the frog in any usual or suitable way. 4 is the share. The edge 5 of the share is arranged to lie in contact with the lower edge of the moldboard, as clearly shown in Fig. 2. At the forward portion of the share 4 is a flange 6 extending at an angle to the body of the share. The rear end 7 of the flange 6 is arranged to lie in contact with the forward end 8 of the landside 3. The rear end portion 7 also lies beneath the forward end of the moldboard 2, as will be apparent from Fig. 3.

I The frog 1 comprises a toe 9 in which is formed a longitudinally-extending opening 10 to receive a stud 11 upon the inner side of the flange 6 of the share 4. The stud 11 prevents the point of the share 4 from sag- Specification of Letters Patent.

Patented June 26, 191 '7.

Serial No. 150,884.

is enlarged as shownin Fig. 2, to permit the head of the stud 16 to pass therethrough.

Secured to the inner-side of the moldboard 2 at a point rearwardly of the plate 13, is a plate 17 which projects below the moldboard and has in its lower edge an upwardly and rearwardly inclined notch 13 to receive a headed stud 19 on the share 4.

' The means for securing the share 4 in place comprises two metallic straps 20 and 21, the lower ends of which are formed as shown in Fig. 5. Referring to said figure it will be seen that the straps have longitudinal slots 22 therein, the upper ends of which are enlarged as indicated at 22 to admit the heads of the studs 16 and 19. The lower end portions of the straps are made tapering, being thicker at the lower end of the slot 22 than at the upper end thereof as indicated at 22 The lower side of the heads of the studs 16 and 19 is preferably rounded, as indicated at 22 in Fig. 5. It will be seen that as the straps are drawn upwardly, the studs 14, 16 and 19 will be drawn toward the upper ends of the openings 13, 15 and 18, and that owing to the tapering or wedge formation of the straps, the share will be drawn into tight contact with the plates 12 and 17.

The upper ends of the straps 20 and 21 are pivoted to the ends of a lever 23, said lever being pivoted at 24 to one end of a draw-b0lt 25. The draw-bolt 25 extends slidably through a housing 26 which is secured to the inner side of the moldboard 2. 27 is a nut turned on the upper end of the draw-bolt 25 and bearing against a washer 28 that rests upon the housing 26. The pivot point 24 is between the ends of the lever 23 and nearer one end of said lever than the other.

If it be desired to remove the share 4, the nut 27 is removed or loosened sufliciently to permit the straps 20 and 21 to be lowered until the headed studs 16 and 19 can be slipped through the enlarged upper ends Of the slots 22. The share 4 may then be disengaged from the rest of the plow, the studs 14, 16 and 19 slipping out of the notch 13 and slots 15 and 18, respectively, and the stud 11 leaving the slot 10. When the share is to be again secured in position, it is put in place with the studs 11, 14, 16 and 19 occupying the recesses 10, 13, 15 and 18. The straps 20 and 21 are slipped onto the studs 16 and 19 and the nut 27 is tightened up. The upward longitudinal movement of the bolt 25 causes the studs to be drawn upwardly and rearwardly in their respective recesses thereby drawing the end 7 of the flange 6 firmly against the forward end 8 of the landside 3, and bringing the edge 5 of the share into close contact with the lower edge of the moldboard. By reason of the wedge formation of the straps 20 and 21 the share also is drawn tightly against the plates 12 and 17. As the nut 27 is tight ened up, the lever 23 tilts on the center 24 until both straps 20 and 21 are under equal tension.

If desired, the construction shown in Fig. 6 may be employed in lieu of the bolt 25 and the lever 23. The bolt 25 represented in Fig. 6 has a broadened head 23 constituting the equivalent of the lever 23. The bolt 25 extends through the housing 26 with suflicient clearance or looseness so that the bolt can oscillate into a position where equal tension is being exerted upon the straps.

The modified means for securing the mem ber 25 or 25 in place may be an eccentric clamp closing in either a downward, upward or sidewise direction that herein shown in Figs. 7 and 8 closing upwardly. A clamping member 29 is eccentrically pivoted upon the bolt 25 or 25, the clamping portion bearing against the washer 28 and the handle portion 30 lying substantially parallel to the moldboard 2 when the straps 20 and 21 are drawn to a locking position.

I claim as my invention:

1. A plow having, in combination, a moldboard, a landside, two plates secured to the inner side of the moldboard and extending below the lower edge of the moldboard, one of said plates being located rearwardly of the other, the forward plate having an upwardly and rearwardly inclined slot having an entrance portion and an upwardly and rearwardly inclined notch in its lower edge rearward of said slot, the rear plate having an upwardly inclined notch in its lower edge, a share having a forward headed stud adapted to enter the slot in the forward plate, a middle headed stud adapted to enter the notch in the forward plate and a rear headed stud arranged to enter the notch in the rear plate, two straps having longitudinal slots in their lower ends, the upper ends of the slots in said straps being enlarged to admit the forward and rear studs, the lower portions of such straps being tapered, a part pivoted to the upper ends of said straps, a draw-bolt connected to said part at a point nearer one of the straps than the other, a housing secured to the inner side of the moldboard through which housing said bolt loosely extends, and a nut turned on the upper end of said bolt.

2. A plow having, in combination, a moldboard, a landside, two plates secured to the inner side of the moldboard and extending below the lower edge of the moldboard, one of said plates being located rearwardly of the other, the forward plate having an upwardly and rearwardly inclined slot having an entrance portion and a notch in its lower edge rearward of said slot, the rear plate having a notch in its lower edge, a share having a forward headed stud adapted to enter the slot in the forward plate, a middle headed stud adapted to enter the notch in the forward plate and a rear headed stud arranged to enter the notch in the rear plate, two straps adapted to engage the forward and rear studs, a part pivoted to the upper ends of said straps, a draw-bolt connected to said part at a point nearer one of the straps than the other, a housing secured to the in nor side of the moldboard through which housing said bolt loosely extends, and a nut turned on the upper end of said bolt.

3. A plow having, in combination, a moldboard, a landside, supporting and bracing structure secured to the inner side of the moldboard and extending below the lower edge of the moldboard and having recesses, a share having two headed studs adapted to entersaid recesses, twostraps having longitudinal slots in their lower ends, the upper ends of the slots being enlarged to admit the studs, a lever pivoted to the upper ends of said straps, a draw-bolt connected to said lever, a housing secured to the inner side of the moldboard through which housing said bolt loosely extends, and a nut turned on the upper end of said bolt.

4. A plow having, in combination, a moldboard, a landside, supporting and bracing structure secured to the inner side of the moldboard and extending below the lower edge of the moldboard and having recesses, a share havingtwo headed studs adapted to enter said recesses, two straps adapted at their lower ends to engage said studs, a part pivoted to the upper ends of said straps, and a securing device connected to said part for moving said part to exert tension on the straps.

In testimony whereof, I have hereunto set my hand.

JOHN BOHMKER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Eatents, Washington, D. G.

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