US3099191A

US3099191A - Sheep foot tamper

Info

Publication number: US3099191A
Application number: US4467A
Authority: US
Inventors: Averette Thomas Perry
Original assignee: Individual
Current assignee: Individual
Priority date: 1960-01-25
Filing date: 1960-01-25
Publication date: 1963-07-30
Anticipated expiration: 1980-07-30

Description

July 30, 1963 T. P. AVERETTE 3,099,191

SHEEP FooT TAMPER Filed Jan. 25, 1960 ZJOMQSPVEQETTE INVENToR.

ATTOFE N E YS United States Patent 3,099,191 SHEEP FOOT TAMPER Thomas Perry Averette, 15400 Lemac St., Van Nuys, Calif. Filed Jan. 25, 1960, Ser. No. 4,467 Claims. Cl. 94-48) This invention has to do generally with the construction of sheep foot tamping equipment of the type embodying a cylindrical roller provided with :a plurality of socalled sheep Afoot tamper-s lwelded to the periphery thereof.

In the use of I'ramping equipment for compacting earth, soil land rocks, the steel tamping feet, even though hardened on the end, become worn and must vbe replaced. Sheep foot ftampers have Ibeen devised wherein the foot or ground-contacting end portion is made removable from the main body yor shank of the tamper which in turn is welded to the surface of the roller or drum, and one such removable construction is shown in my Patent 2,893,298 issued July 7, 1959.

An object of the present invention is to provide a new and improved construction for sheep foot tampers of the type embodying a shank or main body and -a removable foot.

More particularly it is yan object yto provide novel improved means for detachably securing the foot `to the shank, which means is designed to withstand the ordinary use `and abuse to which tamper-s -are subjected.

Another object is to provide a unique construction for a sheep foot tamper whereby different types of feet can be attached to the shank of `the device, and in this connection it is an object to provide improved intertting construction which secures the parts together against rotation irrespective of the uneveny loading of the foot portion, as where crushed rock or the like is being compacted.

A further object of lthe invention is to provide unique cushion means for r-esiliently mounting a retainer in the body of the shank, together with means for detachably securing the foot to the retainer.

Another object is to provide, in -a construction of the type indicated, novel securing mean-s embodying pins, together with novel means for retaining the pins in place.

These .and 'other objects will be apparent from the drawing and the following description. Referring to the drawing:

FIG. 1 is ia fragmentary central longitudinal sectional view through a sheep foot tamper embodying the invention;

FIG. 2 is a sectional View online 2 2 of FIG. 1;

FIG. 3 is a cross sectional view on line 3-3 of FIG. l;

FIG. 4 is .an isometric view of la retainer member; and

FIG. 5 is a 4fragmentary end elevational view of a tamping roller embodying sheep foot tampers of the type disclosed herein.

More particularly describing the invention, the 'tamping roller designated 11 shown in FIG. 5 is normally constructed of metal `and includes .a plurality of the sheep foot tampers 12 on its periphery, Ithe tampers 12 being welded to the roller.

Referring particularly -to FIGURES 1-4, numeral 14 generally indicates the main body or what will be termed the shank, and 15 designates the foot. The shank is provided with `a somewhat concave base surface 16 which is secured .against the periphery of the roller by being-welded thereto. The shank is shown as 'a tapering body of rectangular cross section with parallel side surfaces 17 and converging :end surfaces 18. The Iaforementiofned side surfaces 17 and end surfaces 18 `are stepped in a com-mon plane to provide the shoulder 21 which extends completely around the shank, and to form the recessed upper or side surfaces 17 and recessed upper end surfaces 18.

The interior of the shank 14 is formed to provide a ICC cylindrical socket 24 and inwardly beyond this, ra bore 25. The shank is also provided with ian axial slot 26 which extends radially from bore 25. The bore 25 and slot 26 form a cavity or recess 27 for the reception of a retainer 28. The latter has a cylindrical ybody 30 with a short, radially extending arm 31 -at its inner end. The body 30 is received in bore 25 with the arm 31 received in the slot 26 Beneath the retainer 28 I provide a stiffly resilient cushion 33 which may ybe formed of rubber or plastic. The cushion is appropriately shaped to be received in the cavity 27.

The retainer 2S is provided at its upper end with a threaded bore 35 for the reception of -a bolt 36 the purpose of which is to securely fasten the 'camping foot y15. 'Ihe latter includes 'a body 41 which is shown as provided with la convex, yground-engaging end surface 42. However, feet of various shapes may be used in place of the one shown. Depending from -the body of the foot is a centrally disposed stem 43 which is received in the socket 24 of the shank. The outer surface of the Ibody is provided with .a recess 44 to receive the head of the bolt and beyond that 'with a bolt-receiving opening or passage 45 which includes la cylindrical section 36 and frusto-conical section 47.

The foot 15 is formed to provide a skirt formed by the parallel side walls 50 and end walls 52. This ts over the outer or upper end portion of :the shaink -to engage the recessed .side and end walls of the shank, `as best shown in FIGS. l and 2.

The retainer 28, and' hence the foot 15, are secured to the shank by means of two pins designated 54 and 55 which are mounted in

bores

56 and 57 provided in the shank. These pins are grooved peripherally at 54 and 55', respectively, intermediate their ends for Ia purpose which will bec-ome apparent. 'Ihe pin 54 is positioned yover the arm 31 of the retainer with the `arm partially received in the groove 54' of the pin. 'Ilhe other pin is received in a transverse bore 58 in the retainer. To insert the pins into place it .is necessary that the retainer be pressed down to compress the cushion 33 sufficiently to align -

bores

57 and 58, the cushion being shown so compressed in the drawings. Thus the ycushion maintains ya constant resilient` upward pressure against the retainer which is pressed against the pins, thereby locking the parts in place.

-iAs :an additional means for releasably securing pin 55, I provide a resilient keeper member 61 in a bore `62. in the member 28. The bore 62 extends axially of the body 30 and intersects the transverse, pin-receiving bore 58 at one side thereof, terminating a short distance therebeyond, as best shown in FIG. 1. Member 61 is made slightly longer than the bore `62 'and consequently when the parts are assembled, it is forced upwardly in the bore 6.2 and compressed so that a portion of it flexes into the bore 58 and into groove 55 to tightly engage the pin 55 and retain it.

It will be apparent that the embodiment of the invention described provides a strong construction by means of which #a tamping foot can be detachably secured to the shank. In assembling the parts, the cunshion 33 and retainer 28 are placed in the cavity 27 in the shank. The retainer is then forced against the cushion 33 to compress the same `and permit of the insertion of the

pins

54 and 55. The foot 15 can then be placed over the shank and the bolt 36 inserted :and secured tight to complete the assembly. The resilient mounting of the retainer 28 also makes it possibile to remove the entire assembly from the shank should the bolt 36 become frozen in place.

Although I have illustrated and described preferred forms of my invention, I contemplate that various changes and modifications can be made therein without departing from the invention, the scope of which is indicated by the following claims.

I claim:

1. A sheep foot tamper structure, comprising a metal shank having an inner end `adapted for welding to the periphery of :a metall roller, said shank having a socket in its outer end, a tamping foot having a stern received in said socket, said shank having 4a cavity extending towand said inner end from said socket, an internally threaded retainer in said cavity, `a bolt Seated against said foot and threadedly mounted in said retainer, and means detachably securing said retainer in said shank, said means including "a removable pin extending transversely of said shank and engaging said retainer and a resilient pad between the retainer and the bottom of said cavity serving to yieldably urge said retainer against said pin.

2. A sheep foot tamper structure, comprising a metal shank having `an inner end adapted for welding to the periphery of a metal rolle-r, said shank having a socket in its outer end, a camping foot having a stem received in said socket, said shank having a cavity extending toward said inner end from said socket, said cavity including a bore extending longitudinally of the shank and a slot extending .axially of the bore and radially therefrom, an internally threaded retainer in said cavity, said retainer having a cylindrical body and a radial arm extending therefrom and received in said slot, a bolt seated against said foot and threadedly mounted in said retainer, and a crosspin in said shank overlying the arm of said retainer.

3. A sheep foot tamper as yset forth in claim 2 in which la resilient pad is provided between said retainer Iand the bottom of said cavity serving to urge said lretainer against said pin. v

4. In a sheep foot tamper structure including a shank having la socket and 'a cavity extending inwardly of the inner `.end of the socket and having a tamping foot with a stern received in said socket, means for releasably securing said foot and shank together, comprising an internally threaded retainer `in the socket of said shank, a cushion between said retainer and the bottom of the cavity, said retainer having a transverse bore and a longitudinal [bore extending from its lower end and interisecting said transverse hone and terminating therebeyond, `an elongated resilient member in said longitudinal bore having a normal length greater than that of the bore, la crosspin mounted in said sh-ank and extending through said transverse bore, said pin having :a peripheral groove intermediate its ends positioned `at the region of intersection of said transverse land longitudinal bores, said pin `serving to hold said retainer ltightly against said cushion with said cushion compressed yand with said elongated resilient member compressed yaxially in said longitudinal bore whereby the same tends to emerge from the bore in the region of intersection thereof with said transverse y bore to tightly engage said pin yand thereby resist acc-idental dislodgement of the pin, and a bolt seated against said foot and threadedly mounted in said retainer.

5. A sheep foot tamper structure, comprising a metal shank having an inner end adapted for welding to the periphery :of la metal roller, said shank having a centrally disposed socket in its outer end, a tamping foot having a stem received in said socket and having la skirt receiving said shank, said skirt yand said shank having intertting portions provided with interengaging means preventing relative not-ation thereof, said shank having a cavity extending toward said inner end from said socket, :an internally threaded retainer in said cavity, releasable means -mounted in said shank securing said retainer, `and a bolt seated against said foot extending centrally through said stem and threadedly mounted in said retainer.

References Cited in the le of this patent UNITED STATES PATENTS 967,502 Cooper Aug. 16, 19110 1,425,359 Barry Aug. 8, 1922 1,702,810 Buhr Feb. 19, 1929 1,748,190 Ronalds'on Feb. 25, 1930 2,085,980 Hutchens Iully 6, 1937 2,242,808 Austin May 20, 1941 2,773,693 Chittenden Dec. 11, 1956 2,893,298 Averette July 7, 1959 FOREIGN PATENTS 463,156 Italy Apr. 18, 1951

Claims

1. A SHEEP FOOT TAMPER STRUCTURE, COMPRISING A METAL SHANK HAVING AN INNER END ADAPTED FOR WELDING TO THE PERIPHERY OF A METAL ROLLER, SAID SHANK HAVING A SOCKET IN ITS OUTER END, A TAMPING FOOT HAVING A STEM RECEIVED IN SAID SOCKET, SAID SHANK HAVING A CAVITY EXTENDING TOWARD SAID INNER END FROM SAID SOCKET, AN INTERNALLY THREADED RETAINER IN SAID CAVITY, A BOLT SEATED AGAINST SAID FOOT AND THREADEDLY MOUNTED IN SAID RETAINER, AND MEANS DETACHABLY SECURING SAID RETAINER IN SAID SHANK SAID MEANS INCLUDING A REMOVABLE PIN EXTENDING TRANSVERSELY OF SAID SHANK AND ENGAGING SAID RETAINER AND A RESILIENT PAD BETWEEN THE RETAINER AND THE BOTTOM OF SAID CAVITY SERVING TO YIELDABLY URGE SAID RETAINER AGAINST SAID PIN.