US2629308A - Replaceable point for plow shares - Google Patents

Description

mum/- m-iwx Arramwr R. C. PREVIK REPLAGEABLE POINT FOR PLOW SHARES Filed Jan. 12, 1960 fia- Patented Feb. 24, 1953 REPLACEABLE POINT FOR PLOW SHARES Ralph C. Frevik, Detroit, Mich., assignor to Dearborn Motors Corporation,

Highland Park,

Mich, a corporation of Delaware Application January 12, 1950, Serial No. 138,207

6 Claims.

This invention relates to a plow construction wherein a removable point portion is provided for the share which is readily and economically replaceable when worn for reconditioning the plow.

The soils on various farm lands throughout the country have widely varied characteristics which differently affect the plow. For example, abrasive soils such as a sandy soil rapidly wear and dull the share while certain other soils which contain a large amount of organic matter are far less injurious to such share. As is well known, the useful life of the plow share is comparatively short while the other components of the plow are relatively long lived. This is particularly true of the point portion of the share, which receives the full brunt of wear, and consequently such point is dulled and wornaway long before the wing portion of the share is no longer useable.

While worn plow shares of conventional shape can be reconditioned when worn, such reconditioning is not only time consuming but relatively expensive especially in view of the fact that there are today fewer blacksmiths available for reshaping and resharpening the share. A need, therefore, has been long apparent for a plow construction which utilizes an inexpensively replaceable point for reconditioning the plow at a cost appreciably less than the cost of resharpening the share.

Accordingly, it is an object of this invention to provide an improved plow construction embodying a plow point which is readily removable and replaceable.

Another object of this invention is to provide a separable plow point for a plow share wherein such point is securely locked and supported by other components of the plow when assembled therewith to provide a substantially unitary construction.

A further object of this invention is to provide a replaceable plow point for a moldboard plow which is secured to the plow by a single bolt and is locked in assembly by the other members of the plow.

The specific nature of this invention, as well as other objects and advantages thereof, will become apparent to those skilled in the art from the following detailed description, taken in conjunction with the attached sheet of drawings on which, by way of preferred example only, is illustrated one embodiment of this invention.

On the drawings:

Figure 1 is a fragmentary side levational view of a moldboard plow showing the replaceable share point of this invention secured to the plow.

Figure 2 is a plan view of Figure 1.

Figure 3 is a cross sectional view taken along the plane 3--3 of Figure 1.

Figure 4 is a cross sectional view taken along the plane 4-4 of Figure 1.

Figure 5 is a cross sectional view taken along the plane 5-5 of Figure 1.

Figure 6 is a detail view of the front end portion of the plow illustrated in Figure 1, shown partly broken away.

Figure 7 is a. partial sectional view taken on the p1anel1 of Figure 1.

As shown on the drawings:

In Figure 1 there is shown in assembled relation a moldboard plow having a plow point constructed in accordance with this invention. Such plow comprises the usual frog l0 having attached thereto a landside II and share wing 12 and, of course, a moldboard (not shown). Landside H has a. forwardly extended tapering point It provided with a sloped end surface It, best shown in Figures 1 and 6, for a reason to be later explained. Landside II is preferably constructed from rolled stock and stamped or sheared to size and is secured to one side of frog It by a pair of bolts l5. Share wing 12 may also be constructed from a rolled or stamped section cut to the desired length and provided with a suitable transverse curvature for blending with the cru've of the moldboard (not shown). The forward end of share wing 12 is provided with a squared end surface Hot for a reason which will later appear. Share wing I2 is securedon the opposite side of frog ill by a pair of bolts [6.

A replaceable share point I! is mounted on frog Ill ahead of share wing l2 and such point comprises a substantially pentagonal plate rolled to substantially the same curvature as provided for share wing 12. Share point I! is provided with a squared rear end surface Ila which abuts the squared end surface 12a of share wing 2. The bottom surface [lb of point 1 defines an obtuse angle with respect to the bottom surface of share wing l2 and a forwardly facing cutting edge I'Ic slopes downwardly to intersect the bottom surface llb of point ll. Both the bottom edge Ill) and forward cutting edge Il'c are bevelled to provide an optimum cutting edge and both of such edges are disposed somewhat below the bottom cutting edge" of share wing 2 to thereby increase the life of point IT. The upper edge lid of point I! slopin'gly overlies landside l l as shown in Figure 2 to provide a lead whereby the plow point will more effectively shear the slice from the furrow wall.

On the underside of plow point I! there is welded a. tri-angu-larly shaped lug I 8, such lug being disposed substantially parallel to the upper edge I'Id of point IT as shown in Figure 2. Lug

18 is provided with an integral rearwa-rdly disposed projection Ma and the forward edge of frog I is notched out as shown at a to receive projection Ida. Also on the underside of point ll near theupper forward endof such point there is welded a triangular shaped lug member I9 formed from a section of angle iron which, in cooperation with lug l8, defines a substantially triangularly shaped socket Illa. Member [9 is provided with a sloped inter-iorsurface 191), which abuts sloped surface M onlandside l for a pursorted, through a suitable transverse hole provided adjacent'end surface l la of pointl'll The extended forward end portion [3 of landside H abutting the underside of point ll adequately supports such point.

It may. thus be seen that the locking engagement of projection We of log ['8 with frog l6 and the engagement of the end 13 of landside H within socket 19a locks the tip of point ll to the landsi e; h on y the sin le bolt 29. is required to secure. the point to frog ill. The abutting relationship of the end surfaces 12a and filo respectively or share i2 and point I! insuresv against any rockin movement of point ll when assembled to the plow bottom.

When the frog Ill is of the conventional shape having a rounded front edge Illa, best shown in Figure 'l, a generally triangularly shaped recess or opening 29 is defined between'the front edge Eda of the frog and the adjacent surfaces of the landside H, the share wing l2, and the share point ll. In some instances additional locking of the share point relative to the share wing is desirable, and this invention contemplates utilization of the aforedescribed recess or space 2o to conveniently provide such additional locking. Thus, as best shown in Figures 2 and 7, a bar or rod 2| having a cross sectional area permitting its insertion in the recess 28;, has its one end welded to the bacl; face of the replaceable share point l'i adjacent to, the uppermost tip of such share point and the other'end projecting outwardly beyond such sh are point. The rod 2 is so disposed on the share point I I so as to snugly fit into the recess 2}) and that po on of "the rod 2! which projects beyond the sharep oint ll will underlie the top forward corner ofthe share. wing l2 Hence, an additional posit ve locking of the share point l1 relative to the remaining elements of the plow is conveniently obtained.

It will thus appear from the above description that the plow point of this invention is readily and inexpensively constructed and such point is conveniently mounted on a plow bottom for. rapid assembly or disassembly. A plow point construoted in accordance with this invention may then be. more Qheaplyreplaced with anew point when worn than the cost to the user for recona i in 5 7 h il Th W ne D0., of the share needs relatively little attention because ch i e Port n re e little wa parison t m lpw p o n the e; su

wing portion may be retained on the plow for the life of several plow points before reconditioning of the share wing is required.

It will, of course, be understood that various details of construction may be varied through a wide range without departing from the principles of thisinvention and it is, theref-ore, not the purpose to liinit the patentgranted hereon otherwise than necessitated by the scope of the'appe'nded claims.

I claim:

1. A plow-construction comprising a frog having, angularly disposed moldboard and landside fac'esf andia forwardly opening recess, a landside having a tapered forward end, means for securing said landsi'de zm'sam frog, a share secured to the moldboard face of said frog, a replaceable share point having a rearwardly projecting lug on its rear face, a projection on said lug engageable with said frog recess, an angularly shaped member secured to the rearfac a e of Sansone point adjacent saidlugfsaidang'man fshapea membar defining a 'socket f'or snugly receiving the tapered forward end of said lan'dside, and bolt means for securing said sharepoint to said frog in abutment w h thefforward end'of said share.

2. A pl-ow constructioncomprising a frog having a forwardly facing recess and 'ang'ularly disposed rnol dboard and landside faces; a landside having a tapered wedge-like forward end, means for securing" said lands ide' 'on said frog with the apered o ward end being d s he d of said frog, a share secured to the -moldboar'd face of said frogga replaceable share point having a eer e ydly d spo d o on. t a face, a o e ti on on said lug engageable with said frog recess, an e heoed member se red to he ear ac of said share point adjacent said lug, said angle shaped member defining a socket having a sloped bottom surface, said socket being constructed and arranged to receive'saidwedge shaped end of said landsl de with said lug contiguous to said landside, the front end surface of said landsi-de cooperating with said sloped bottom surface to I lock saidshare point on said landside, and bolt or the, free with its top forward corner project-,

ing beyond said juncture surface, a plate like landside secured to the landside face of the frog with at least a portion of its forward edge projecting beyond said juncture'surface and c0- opcratingwith said top forwardcorn'e'r of said share. wing and saidjuncture surface of said frog to define a three-walled recess, a replaceable share point abutting said share wing and said forward edge. of said landside, and a projection secured to the rear face of saidshare point. and projecting beyond said share. point into said recess to locksaid share, point to the D ow.

' 5. A plow construction comprising a frog having angularly disposed moldboard and landside faces terminating in a juncture surface, a platelike. share g secnred to said moldboard face of he fro Wi -ll i s 12 i rw rd were c ins bey d said uncture, surfac ge' latelandside having a forward portion projecting beyond said juncture surface of said frog, said forward portion of said landside cooperating with said top forward corner of said share wing and said juncture surface of said frog to define a pocket, a replaceable share point comprising a plate-like member having a working face, means integrally secured to the rear face of said platelike member defining a socket for snugly re-- ceiving the tip portion of said forwardly projecting portion of said landside, and a rod-like projection integrally secured to the rear face of said plate-like member and projecting into said pocket to thereby lock said replaceable share point in assembly on the plow.

6. A replaceable plow point for a plow having a frog, a landside with a tapered front end projecting forwardly beyond the frog, and a share wing mounted on the frog with its top forward corner cooperating with said landside to define a pocket immediately in front of REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,048,962 Harrison Dec. 31, 1912 1,230,846 Bohmker June 26, 1917 2,335,977 Thomas Dec. 7, 1943

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