US1502832A - Cultivator tooth - Google Patents

Description

July 29, 1924. F V 1,502,832

C. D. KIRTLAN CULTIVATOR TOOTH Filed April 4. 1923' 4 INVENTOR. D. Kalil/6L1? ATTORNEY Patented July 29, 1924.

UNITED STATES CLARENCE D. KIRTLAN, OF VISALIA, CALIFORNIA.

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Application fil ed April 4, 1923. Serial No. 629,798.

To all whom it may concern:

Be it known that l, CLARENCE l). KlRT- LAN, a citizen of the United States, residing at Visalia, county of Tulare, State of California, have invented certain new and useful Improvements in Cultivator Teeth; and I do declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings, and to the characters of reference marked thereon, which form a part of this application.

This invention relates to improvements in that class of agricultural implementsknown as cultivators, and particularly to the construction and mounting of the teeth; the principal idea being to provide teeth so designed and mounted that they are especially adapted for cultivation in rocky ground, without any chance of bending or breaking the teeth or standards if rocks and the like are encountered which offer great resistance to the forward movement of the cultivator.

I have also provided that any tooth may be easily removed and replaced by another when necessary, without disassembling the entire structure.

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

These objects I accomplish by means of such structure and relative arrangement of parts as will fully appear by a perusal of the following specification and claims.

On the drawings similar characters of reference indicate corresponding parts in the several views:

Fig. 1 is a top plan view of acultivator, showing a set of my improved tooth units mounted thereon.

Fig. 2 is an enlarged side view of one of the tooth units, in normal position.

Fig. 3 is a similar view, showing the tooth as mounted when striking a relatively immovable obstruction.

Referring now more particularly to the characters of reference on the drawings, the numeral 1 denotes the main longitudinal and transversely spaced frames of a cultivator, mounted on wheels 2 in the usual manner.

Resting on the frames 1 and bolted thereto are transverse and longitudinally spaced beams 8, which form the supporting means for my improved tooth units, of which there are any desired number. Since these units are independent members but duplicates of each other, it will of course only be neces sary to describe one of the same.

.Each unit the-n consists of a pair of. short and transversely spaced bars or frames 4, secured to and under the beams 3, and extending parallel to the frames 1, or longitudinally of the cultivator. Between the beams 3 and' l a rigid tooth 5, substantially vertical, extends, which is pivoted on the bars 4 as at6. I

On the lower and forward end of the tooth is a removablewearing strip or saddle 7, held in place by a U-clamp 8. V

Brackets 9 are pivotally mounted at the upper end of the teeth, in which are adjustably mounted links 10, one on each side of extend to the tooth on each side thereof, and are pivotally-and slidably mounted thereto by means of a bolt or pin 12 in the tooth passing through longitudinal slots 13 in the bars 11.

Pivotally mounted in connection with the bars 4 to the rear of the connection of the tooth therewith are straps 14:, which straddle the bars 11 and are pivoted on and between the links 10 intermediate the ends thereof, and preferably just a short distance above the pivotal connection of the bars 11 therewith. A stiff helical compression spring 15 surrounds the bars 11, and extends between the tooth and the straps 14, bearing plates 16 being provided at the ends of the spring between the same and the members 5 and 14, the latter at this point'being substantially parallel to the tooth, so as to form a good bearing surface for the adjacent plate. The normal tension of the spring may be regulated by adjusting the nuts 10 of the links 10. I

In operation, the rear edge of the tooth aboveits pivot 6 normally bears against the adjacentbeam 3, preventing forward and upward movement of the lower end of the tooth,the strength of the spring 15, which tends to pull the upper end of the spring back, being sufficient to hold the tooth in the above stated position when the latter is working in groundwhich offers only a normalresistance to its passage therethrough.

When a rock or the like is encountered however, the tooth is tilted forwardly, and the spring is gradually compressed, increasing the resistance offered by the tooth but at the same time ,causing itkto be moved into sucha :position that it isenabled to 2111018 readily clear the obstruction, even though it may raise the main frame land rear whee] 2 off the ground While so doing. The time ible connections between the tooth, {spring and other members causes the spring to be brought into function smoothly andwithout any shock being imparted to the tooth or frames. It'also enables the spring to be compressed in a direct line with its axis-at all stages since the strapsl remain substantially at right angles to the tooth a t-all times.

To'remove any tooth, it is only necessary to withdraw the bolts 6, 1'2 and the one which holds the bracket 9, when the toothmay-be Withdrawn in a vertical direction.

Each tooth unit on the cultivatorbeing independent of the other, each will of course function independent of the other.

From the foregoing description it willbe readily seen that 'I have produced suclra device-as substantially fulfills the objects'of the inventionas set forth herein.

While this -speci-fication-sets forth in detail the present and preferred construction'of the device, still in practice suchdeviations froin such detail may be resorted to as do notiforni a departure from the spirit of the appended claims. 7

xHaving thusdescribed myinventiom-what 1' c1&im.-=-as new, and usefuhand fdesireto secure by Letters Patent is:

l. A cultivator. tooth structure including a supporting frame, a tooth pivoted therein for limited fore and aft swinging movement,

straps pivoted on the frame to the rear of thetooth pivotand extending upwardly in spaced relation to the tooth, links between 4 the upper ends of the straps and teeth and pivotally connected to both, and a helical spring'between the'straps and tooth and arrangedfor compression when the upper portion of 1 the tooth moves forwardly.

A- cult-ivator tooth structure including a supporting frame, a tooth pivoted therein therewith andeXtend-iug to slidable connec-" tions Withthe-tootlnend a helical compres- S1011 spring about the bars and hearing at one end against thetooth-an'dat the other end against the straps.

"In testimony whereof l aifixmysignature.

'cLaR-ENoE D. 'KIRTLAN.

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