US1115566A - Wheel-tire. - Google Patents

Description

A. A. PIGARD. WHEEL TIRE.

APPLICATION FILED 00124, 1913.

1,115,566, Patented Nov. 3, 1914.

Tan STATES PATENT OFFICE ALPHONSE ARTHUR PICARD, OF NEW YORK, N. Y.

WHEEL-TIRE.

To all whom i; may concern:

Be it known that I ALPHONSE ARTHUR PICARD, a subject of (irreat Britain, and a resident of the borough of Manhattan, city, county, and State of New York, have invented certain new and useful Improvements in Wheel-Tires, of which the following is a specification.

My improvements relate to a floating rim tire of the character designated in my Letters Patent No. 1,071,953, issued to me Sept. 2nd, 1913, and designed primarily to afford a simple but effective substitute for the inflated tire, overcoming the difiiculties and inconveniences involved in the use of the latter, and attaining other practical advantages, such as strength combined with resilience and durability, comparative cheapness, &c.,the distinctive feature of the present invention consisting in the interposition, between the central fixed base rim and the annular flange of the floating tire rim, of a series of elastic resilient cushions which reinforce and sustain the floating rim under strain while allowing it to adapt itself thereto under all conditions of use as hereinafter described and claimed specifically.

In the accompanying drawings, Figure 1, is a transverse section of my improved tire in which annular truss struts are used as in my Letters Patent hereinbefore referred to; Fig. 2, is a similar view in which said annular truss struts are omittedand my elastic resilient cushions are relied upon entirely to sustain the floating rim Fig. 3, isan end View of the cushion shown in Fig. 1, upon a larger scale; and Fig. 4,. a side elevation thereof; Fig. 5, is a side View, and Fig.- 6 an edge view of one of the cushions shown in Fig. 2, on alargerscale; Fig. 7, a section upon plane of line 7-7 Fig. 5; Fig. 8, a section upon plane of line 88, showing also the retaining bolt i cross section; Fig. 9, a sectional detail showing a modification; Fig. 10, is a diagrammatic view representing on a small scale the use of a plurality of my compensating cushions of the form shown in Fig. 9.

B represents the central base rim attached 'to the spokes S, of the wheel or otherwise Specification of Letters Patent.

Application filed October 4, 1913.

Patented Nov. 3, 1914. Serial No. 793,267.

ed a solid tread t, of elastic resilient ma terial, the external surface of which is preferably curved con vexly as related to its cross section so as to aflord a limited con tact with the ground. The rear of the auxiliary rim A is formed with a central annular flange a, the inner portion of which fits in the annular groove 6, in the base fim B, so as to be supported laterally by the sides thereof, the groove 6, being of suflicient depth to admit of the requisite degree of play between the parts.

In Fig. 1 elastic resilient annular truss struts s, s, are interposed between the flanges b, b, and the auxiliary rim A,as in my Letters Patent hereinbefore recited, the edges of said struts s, 8, being secured in place by the use of suitable mechanical expedients. Thus the outer edges of the truss struts s, s, are secured to the annular flange a, by means of screw bolts c,annular washer plates d, 03, being interposed between these edges of the struts s, s, and the bolt heads and nuts. In similar manner the inner edges of the truss struts s, 8, may be secured to the outer edges of the base rim flanges b, b, by means of ring plates 6, e, and screw bolts e, e, and nuts 6 c and the flanges b, b, may be formed with annular beads or shoulders 6 6 to engage with corresponding grooves in the opposed surfaces of the struts s, s, for the purpose of preventing the lateral creeping of the said struts. p

When used in connection with the truss struts s, .9, my series of compensating cushions 70, 7c, are designed to supplement and control the action of the said struts 8, 8, reinforcing them against undue strain and limiting their extent of flexure, and this combination is desirable where the said truss struts are used on tires subjected to especial strain, as in the case of vehicles designed for heavy traction, such as automobiles and wagons employed for purposes of commercial transportation, &c. For lighter vehicles however, and to economize in space and render the tire more simple and compact in structure the truss struts s, 8, may be dispensed with and my compensating cushions is, k, relied upon entirely to affordthe requisite degree of elasticity and resillence, as in Figs. 2 and 9.

In any case the essential feature of my present invention consists in the use of a plurality of these compensating cushions k, is, arranged equi-distant around the wheel, and, to all intents and pur oses, interposed between the side walls b", of the annular groove 6, in the base rim B, and the central annular flange a, of the auxiliary rim A, in such manner as to admit of the requisite degree of motion between said parts while acting as elastic resilient media to absorb and compensate for the shock and strain of traction. Obviously the form and arrangement of my intermedial compensating cushions 70, k, may be varied without departing from the spirit and intent of my invention. Thus in Fig. 1, a plain cylindrical cushion k, of elastic resilient material, shown in detail in Figs. 3 and 4, is simply seated in recesses b 6 in the side walls I)", b", of the base rim B, and the recess a, in the annular flange a, of the auxiliary rim A, said recesses coinciding with each other when the tire is not subjected to strain which is the position assumed for convenience of illustration in the drawings. In this arrangement shown in Fig. 1, side caps f, 7, may beused to prevent the displacement of the intermedial compensating cushions k, k; and the edges of the recesses b 6 a, may be rounded oif to prevent shearing action and afford space for the compression of the cushions.

In Fig. 2, separate compensating cushions is, k, are situated-in each of the recesses 12 ,6 of the base rim B, mounted axially upon a bolt g, seated in the recess a, in the annular flange a, of the auxiliary rim A,the head of the bolt and the retaining nut g", being flanged, or washers being used to cover the recesses b b An alternativeconstruction is shown in Fig. 9, in which an intermedial compensating cushion is, is positioned in each recess a, (enlarged for the purpose) in the annular flan e a, of the auxiliary rim A, and

4 the bolt is seated in the (contracted) recesses N 175 In either case the size of the intermedial compensating cushions k, is proportionate to the extent of play and elastic resilient resistance called for by the requirements of use for which the tire may be designed.

When used as illustrated in Figs. 2 and 9,

the cushions k, may be in the form of disks having side concavities k, to facilitate the compression of the rubber composition or other elastic resilient material of which the cushions may be formed.

The number of intermedial compensating cushions is, used, their size, and their distribution around the base rim B, will depend upon the character and requirements of the vehicle'to be fitted with this form of tire.

In order to prevent undue frictional heating by reason of the turning of the cushions k, 70, upon the retaining bolts or within the recesses I form the contacting parts with interlocking ribs and grooves which revent rotation,as the ribs 1', on the cushlons fitting in corresponding grooves in the bolts 9, g, and in the side walls of the recesses 6 b, a, or alternatively vice versa, as may be desired or 'found most expedient.

What I claim as my invention and desire to secure by Letters Patent is,

In a tire of the character stated, a base rim formedwith an annular groove having recessed side walls, an auxiliary floating annular rim formed with a central flange freely slidable in said groove, said flange being recessed coincident with the recesses in the side walls of the base rim groove, elastic resilient cushions positioned intermedially in the recesses of said base rim and annular rim, and means bearing against the outer faces of the base rim opposite said recesses and holding said cushions in place, said resilient cushions and recesses having interlocking ribs and grooves to prevent rotation of the cushions.

ALPHONSE ARTHUR PIOARD.

Witnesses:

GEO. WM. MIATT, DOROTHY L.

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