US1623317A - Scarifier - Google Patents

Description

4 1,623,317 April 5. 1927f R. G. LE ToURNEAu SCARIFIER Filed June 2. 1925 "fill/l1.

INVENIQR R.GLe-Tourneau I BY ATTO EY ent manners.

mitted, and at times the bolt or tooth'breaks. In anyevent considerable time and effort is Patented Apr. 5, '1927.

j 1 UNITED ns'rATlazs 1,623,317 PATENT oFFlc'ni ROBERT G. I .E T'OUBNEAU, Voii srocxrou, CALIFORNIA.

scAnIrIEn.

Application led June 2, 1926. Serial No.\118,164.

This invention relates to improvementsin scarifiers such as are used in connection with road making `or repairing operations, and particularly to the mounting and securing y of the teeth onto the scarier frame.

Such teeth due to the hard wear .to which they are subjected frequently require replacing either because of their being worn out or from having been broken. Atp'resent as far as Iam aware all such teeth are mounted on their frame by bolting in differ- The bolt-nuts sometimes freeze s o that itfis almost impossible to get the same'ofhand yet if they are not tightly cinchedup the slippage of the teeth is pernecessary toI effect toothchanges, as is well known' to all those operating devices of 'this character. l Thei principal vobject of my invention therefore is to provide .means for mounting such teeth to their frame in such a manner that they are positively held against upward anddownward movement, while at the same time the teeth may be almost instantly removed whenever necessary. yThe bolts with their objectionable features are elimv' inated, and the teeth are not weakened -in any manner so that there is no tendency for the same to fracture under any load. Alsov the holding means is so arranged -that the strain on the teeth does not tend to distort orf break such means.

A further object of the invention is to producea simple and inexpensive device and yet one which will be exceedingly effective for the purpose for which it is designed.

These objects I accomplish by means 'of such structure andrelative `arrangement of kparts as will fullyappear by a perusal of the '-following specification and' claims.

.In the drawings similar characters of reference' indicate corresponding parts in the several views: l

set-up of the implement as a Whole forming no part of m invention. Thejbeam preferably comprises low box section member consisting of top and bottom platesl and 2, and end plates 3; all said plates being welded together'. along their edges to forma rigid structure.

Each tooth to be mounted in connection with this beam comprises a ground engaging portion 4 of` suitablev shapeand a shank 5. The back face' of ths shank toward this upper end is beveled as at 6 with a head or lug 7 latthe top overhanging the forward face of the shank. This tapered portion is. adapted to seat in vertically alined orifices 8 and 9 cut through -the plates 1 and`2 respectively, the upper orifice being narrower than the lower to correspond somewhat to the reduced size of the upper end of the shank.

The lower orifice 9is of such a size asto asv snugly receive the shank just belowv the taper portion thereof, in which position of the shank the head 7 rests on top of the beam.' It will therefore be seen that the tooth can' neither move u nor downto any extent. In order to ena le the head to be cleared from the beam so that' it can pass through the upper orifice 8 when it is desired to remove the tooth, said'upper orifice is I nade sufficiently deeper or longer than the. adjacent portion of the shank so thatthe latter -may be tilted longitudinally suiiilcient for the lhead to pass'through the orifice as shown by the dotted lineposition in the drawing. Tov normally prevent Jthe sha-ft y:from having such tiltingl movement' I provide a drift keylO toy be removably inserted into the' orifice 8 between the' rear edge of the same and the yadjacent face of the shank. With this arrangement itwill be seen that the workin strain on the tooth is taken by the forwar edge of the upper orifice and by the rear-edgeif the lower orifice. There is therefore no tendency for the key to bes...

forced out of place or tol be distorted by ressure, but it will tend rather to lodge 1n place all the more firmly.

The length of the beam is suiiicient 'to enable any desired numbervof teeth to be mounted thereon,l while the` widthv of the l:beam 'is such as to allow two rows of'teeth being supported. While the holes for such rows are shown in the drawing as being in common longitudinallyalinement relative to thevline of travel of the implement, theseV holes would actually be staggered or offset, since it will be obvious` thatV one tooth directly behind another would not be of any value.' i 'g It will also be obvious that as far as the principle of construction and operation of my arrangement isv concernedy the beamr l`could be made solid, but such construction would'render the same so heavy as to be im'practicablegf' a hekey is straight, and is held in place by (giravity, so that it may be removed by han without the use ofany tools. A .short length of chain 11 preferably connects the key to the main frame to prevent possible loss of the key. 4 In the type of device shown in Fig. 2, the taper portion 6a of the shankf extends below the orificeY 9a, and the shank therefore lwedges into the orifice. Otherwise the arrangement of parts is`the same. 'l

From the foregoin description it will be readily seen that I ave produced such a device as substantiall fulfills. the objects of the inventionas set orth herein.

While this specification sets forth in detailr the present and preferred construc- 1 tion of the device still in practice sueh 'may pass therethrou the'shank andl opening for4 normally preat the top thereof than-at the ttom, a

tooth having a shank insertible through the opening from the bottomther'eof, the shank snugly fitting the opening at the bottom, but being lnarrower at its` upper end than the adjacent end of the opening, an overhanging head on the shank disposed to over.- hang the beam at one end of the relatively wider portion of the opening, whereby when the shank is tilted in the o ening the-head gh, an means between venting such tilting4 movement.

2; A structure as in claim l, said means comprising a removable drift to be inserted lin the upper endl of the opening betweenv the face of the shank oppositeto the head and the adjacent end ofrthe`opening. 3. In a scarifier, a horizontal beam having a vertical opening therethrough, a tooth having a shank insertible throu h the Qpenf' ing from the bottom thereof, t e rear face of the shank being tapered in a manner to cause the shank to Wedgingly engage the lower end of the opening but to,leave a space between the rear end of the opening at its top and the adjacent tapered face of the shank, ahead o n the shank verhanging the forward face of the same to overhang the top' of the beam, and a removable draft insertiblein the space at the upper end of n a vthe openi-ng. a In testimony whereofI affix my signature.

- ROBERT G. LE froUnNEAU.

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