US1253155A - Wheel-scraper. - Google Patents

Description

J. D. CONROY.

WHEEL SCRAPER.

APPLICATION FILED MAY 15, 1917.-

INVENTOR WITNESSES p. 60172 W BY . JOHN D. CONROY, 0F CHOKIO, MINNESOTA.

WHEEL-SCRAPER.

resales.

Specification of Letters Patent.

Patented Jan. a, 19th..

Application filed May 15, 1917. Serial No. 168,753.

To all whom it may concern:

Be it known that 1, JOHN D. CoNRoY, a citizen of the United States, residing at Chokio, in the county of Stevens and State of Minnesota, have invented new and useful Improvements in Wheel-Scrapers, of which the following is a specification.

This invention relates to wheel scrapers, and more especially it is applicable to the wheels of drills.

The purpose of the device is to scrape the mud from the periphery or tire of the wheel, so that the latter will not slip on the earth, and the object of the invention is to produce a scraper of this character which is springpressed toward and preferably in contact with the rim of the wheel although it can be instantly thrown out of contact at any time, and also one in which the blade is'reversible when it becomes worn.

These 01)]6CtS are carried out by the construction hereinafter more fully described and claimed, and as shown in the drawings wherein:

Figure 1 is a perspective view in outline of the rear end of a Monitor drill or furrow opener with this attachment applied.

Fig. 2 is a side elevation of the attachment removed.

Fig. 8 is a similar elevation of the attachment as adapted for the Van Brunt drill or the Kentucky drill or others of like structure.

In Fig. 1 of the drawings I have used the letter \V to designate a wheel and B a box or hopper. The frame F of the Monitor machine is of tubing as shown, and the structure of my improved attachment is made accordingly when applied to this machine. The frame of other types of machines is of angle-iron, and the structure of my attachment is slightly changed to adapt it thereto, although the general principle of either is the same.

Coming now to the details, the reference numeral 1 designates a shank which is tubular in Figs. 1 and 2 and flat in Fig. 3 as indicated at 1, the former being pierced with openings 2 and the latter with slots 2. The rear end of the shank is bent substantially at right-angles to a crank-arm 3 which would be a continuation of the tubular shank or a sleeve 3 attached to the rear end of the fiat shank. The scraper itself is a blade or plate 4: substantially rectangular in contour and preferably flat, and to its rear side are attached two loops 5 constituting bearings and which loosely embrace the crank arm at spaced points thereof. Coiled on the crank arm just inside the bearings are springs 6, each having one end 7 attached to the arm and the other end S pressing the lower edge of the plate normally forward and into active contact with the periphery of the wheel TV. Each corner, or two diagonally opposite corners, of the plate are pierced with openings 9 in which may be selectively inserted a screw-hook 10 held by nuts 11 set up tight against the opposite faces of the blade. Finally a chain 12 is provided, one end being attached as at 13 to the box B at an appropriate point, and a proper link thereof is engaged with the hook when it is desired to tilt the blade so that its lower edge will not contact with the wheel. Obviously it is possible by disengaging this link and reengaging the hook with another link nearer the box, to throw the blade out of active position or in other words, to remove its lower edge so far from the wheel that it no longer acts as a scraper. As seen in Fig. 1 the tubular shank 1 is slipped into a pipe of the frame F and held by screws or bolts passing through the frame and through the openings in the shank. Correspondingly the flat shank 1 shown in Fig. 3 is attached to the frame of other types of drills or similar machines, by laying the shank alongside the frame and passing bolts through the slots in the shank and through openings in or formed in the frame at an appropriate point. When this scraper is not to be used at all, these fastening means may be removed and the entire attachment withdrawn. When the scraper is applied, it may be thrown temporarily out of action as suggested and at times when it is desired that it shall not work. The use of a device of this class is too well known to need any amplification here. A particular feature of the invention is the possibility of reversing the scraping blade or plate when its lower edge becomes worn. This is done by dis" connecting the springs where they are attached to the crank arm, and slipping both bearings and both springs off the extremity of the crank arm, then reversing the plate end for end, re-assembling the parts, and slipping them back into place again.

. "What is claimed as new is 1. In a wheel scraper, the combination with a support comprising a shank having llllll n i c r. c c v q and carrylng a rlght angular cranl' arm;

of a scraping blade rectangular in contour and having openings at its obliquely opposite corners, bearings attached to the blade, and revolubly mounted on said crank-arm, a

spring secured to the latter and pressing the lower end of the blade normally into contact with the wheel rim, and a chain attached at one end to the vehicle body and having a hook at its other end adapted to engage the opening in whichever end of the blade is uppermost, whereby said blade is rendered reversible.

2. In a wheel scraper, the combination with a support comprising a shank having means for attachment to the vehicle frame and carrying a right-angular crank-arm; of a scraping blade, bearingscarried thereby and revolubly mounted on said crank-arm, a spring secured to the latter and pressing the lower end of the blade normally into contact with the wheel-rim, the corners of said blade being pierced with openings, a screw hook selectively mounted in one of said openings at the upper end of the blade, and a chain attached at one end to the vehicle and having its links engageable with said hook, for the purpose set forth.

3'. In a drill wheel scraper,-the combination with a tubular shank bent at right angles' into a crank-arm,rboth the shank and the arm being pierced with openings, fastening means through the openings in the shank whereby it may be attached to the frame of a drill, anda chain-connected at one end with the box of the drill; of a rectangular scraping blade lying forward of.

said crank-arm, hearings on its rear face embracing the crank-arm, springs coiled on the latter between said bearings and each having one end engaging the arm and the other end pressing against the blade to throw its lower edge into active contact with the drill wheel, and means at the upper end of the blade selectively engaging the links of said chain, for the purpose set forth.

In testimony whereof I affix my signature.

JOHN D. CONROY.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washinaton. 31C.

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