Патент USA US2412343код для вставки
Dec.10',1946. ‘ ‘ @MAUER - 2,412,343 LAWN MOWER REE-EDGER Filed April 21, 1944 2 Sheets-Sheet 1 779,1“ ‘ INVENTOR. George cZLauer ‘ BY ATFDRNEYS ' Dec. 10, 1946. 2,4129343 G. J. L'AUER LAWN MOWER RE-EDGER Filed April 21, 1.944 2 ‘Sheets-Sheet 2 ' INVENTOR. George Mlle; mer w o ATTDRN EYS 2,412,343 Patented Dec. 10, 1946 " UNITED STATES PATENT OFFICE 2,412,343 LAWN MOWER RE-EDGER George J. Lauer, Long Beach, Calif. Application April 21, 1944, Serial No. 532,074 3 Claims. (01. 51-250) 1 2 The invention relates to a re-edger for the cutting blades of a lawn mower, and more espe cially to an automatic sharpener device for lawn Figure 3 is a, fragmentary front view of the device. Figure 4 is a perspective View of one of the mowers. clamping bars of the device detached. Figure 5 is a similar view of the other clamping bar of the device, Figure 6 is an exploded view in elevation of one cutting blades of a lawn mower can be readily of the hanger bolts used with the device. and conveniently sharpened when the said mower Figure '7 is a view similar to Figure 2 showing is bodily moved and has its wheels contacting a foundation or the ground or while the said wheels 10 another adjusted position of the mower for sharp ening purposes. are out of contact with such foundation or ground Similar reference characters indicate corre and turned by hand, to have the stationary blade sponding parts throughout the several views in and the rotary blades match one another under the drawings. the sharpening operation, in either instance. Referring to the drawings, A designates gen _ Another object of the invention is the provi erally a portion of a lawn mower of any standard sion of a device of this character, wherein should construction, it being the hand manipulated type, the lower stationary blade be out of contour, the The primary object of the invention is the pro vision of adevice of this character, wherein the and is shown merely to illustrate the application flexibility of such device will permit the rotary thereto and the operation of the sharpening de cutting blades to effectively grind for meeting and conforming with the cutting edge of the said 20 vice'constituting the present invention and here inafter set forth in detail. The mower A as usual lower stationary blade of the mower, the said has supported in its carriage ID a bladed rotary device being novel and unique. cutter H, which is driven by the ground wheels further object of the invention is the pro l2 in the ordinary well known manner, and the vision of a device of this character, wherein the grinding or sharpening medium thereof is sus 25 blades 13 of this rotary cutter ll cooperate with a stationary lower cutter blade l4 ?tted to the ceptible of adjustment and such device can be carriage, while the latter is equipped with a trailer attached and removed with dispatch to and from roller I5 arranged rearmost to said blade M, as the mower. is common. Associated with the carriage‘ I0 is A still further object of the'invention is the provision of a device of this character, which is 30 a handle bar [6, for hand manipulation of the mower in the cutting operation thereof. simple in construction, thoroughly reliable and The sharpening device constituting the pres e?icient in operation, readily and easily applied ent invention, comprises a pair of clamping bars and removed, strong, durable, eliminating hand I‘! and 18, respectively, the former serving as a sharpening of the blades of a lawn mower, avoids the use of steel ?les for sharpening purposes, as 35 hanger piece and is mounted underslung to the blade M by hanger bolts I9, each being selectively there is employed emery cloth or other like engageable in spaced clearances 20 therefor as abrasive sheets of material in the sharpening provided in said bar I‘! for the proper detachable operation with a flexible sweeping action retained ?tting of the same to the under side of the blade thereby, and inexpensive to manufacture and 40 M, as is clearly shown in Figures 1, 2 and 3, of install. the drawings. With these and other objects in view, the in The upper forward edge of the bar i1 is ar vention consists in the features of construction, ranged so as to be flush with the front edge of combination and arrangement of parts as will the blade M, which is the cutting edge thereof, be hereinafter more fully described, illustrated in and the bar [3 is attached to the bar H by ad the accompanying drawings, which show the pre ferred embodiment of the invention, and pointed out in the claims hereunto appended. In the accompanying drawings: justable clamping bolts 2!, these being in clear ances therefor disposed crosswise of the bars I‘! and I3, intermediate and near the outer ends thereof. The bolts l9 and 2| carry winged nuts Figure 1 is a fragmentary top plan view of a lawn mower of standard construction showing 50 22, for convenience in handling. Adapted to be replaceably clamped between the device constructed in accordance with the invention applied for sharpening purposes. Figure 2 is a vertical transverse sectional view of the mower and device with the said mower in an adjusted position for sharpening purposes. the bars l1 and 18 for ?exibly overlapping the blade H! at one edge portion is a strip-like emery cloth or other abrasive sheet of material 23, over 55 which sweeps and contacts the blades 13 of the 2,412,343 , 3 4 cutter at the grinding face of such cloth or sheet of material 23, so that when the cutter H ro tates the blades l3 thereof will become sharpened. Now, by positioning the mower A as shown in Figure 2 of the drawings with the device applied, type of mower for sake of simplicity of under standing, but is not intended to mean that it can not be used on any other type of lawn mower or shearing device. the wheels I2 elevated from a foundation or the l. A sharpening attachment for a lawn mower having a stationary cutting blade and rotary cut ting blades coacting therewith, comprising a pair of adjustably connected clamping bars, means for detachably fastening one bar underslung to What is claimed is: ground, the latter can be hand turned for the driving of the cutter ll, so that the blades l3 can be automatically sharpened by the said de vice. In Figure '7 of the drawings, the wheels 10 l2 of the lawn mower are in contact with the foundation or ground, so that when the mower the stationary blade so that the upper forward edge of said bar is ?ush with the front edge of 7 said stationary blade, and the other clamping bar connected to said ?rst clamping bar so that the upper edge of said bar lies in the same hori zontal plane as the upper end of said ?rst clamp is pulled upon the wheels I2 will drive the cutter II and in this fashion the blades l3 thereof will be automatically sharpened by the device when applied to such mower, The ?exibility of the cloth or sheet of material 23 will permit the ro-. tary cutter to effectively grind for meeting and conforming with the cutting edge of the lower stationary blade l4, especially when the latter has become worn unevenly, for satisfactory co ing bar, a ?exing abrasive strip clamped by said bars andoverlapping the cutting edge of the sta tionary blade for sweeping engagement by the 20 rotary cutting blades. operating cutting action between the blades I3 and IQ of the lawn mower. The bars 11 and I8 may be made of any se lected or suitable material for effecting proper clamping, action therebetween and durability. It is, of course, understood that changes, vari ations and modi?cations may be made in the invention as fall properly within the scope of the appended claims, without departing from the 30 , 2. A sharpening attachment for a lawn mower having a stationary- cutting blade and rotary cut ting blades coacting therewith, a bar removably connected to the lower face of the stationary cut ting blade so that the upper forward edge of said bar is ?ush with the front edge of said stationary cutting blade, and a ?exing abrasive strip carried by the bar and extending over the cutting edge of the stationary blade. 3. A sharpening attachment ,for a lawn mower having a stationary cutting blade and rotary cut ting blades coasting therewith, a, bar removably It is believed that a clear understanding of the connected‘ to the lower face of the stationary invention as to its construction and operation cutting blade, a, clamping. bar removably secured will be had from the. foregoing description when 35 to the forward face of the ?rst mentioned bar, taken in connection with the drawings, so a more and a ?exible abrasive strip clamped between extended explanation has. been omitted for the said bars and extending upwardly and rearwardly sake of brevity. ' over the cutting edge of the stationary blade. spirit of the said invention or sacri?cing any of its advantages. ' All foregoing description is used to, describe the device in operation on a hand manipulated 40 GEORGE J. LAUER.