US1331855A - Tike-boot - Google Patents

Description

NITED STATES EDGAR M. STEELL, OF SPOKAE, W'ASHINGTON rinnnoor.

Specification of Letters Patent. Patented Feb. 24, 1920.

Application le October 30, 1918. Serial No. 266,381.'v

To all whom t may concern:

Be it known that I, EDGAR M. STnnLL, a citizen ofthe 'United States, residmg at Spokane, in the county of Spokane and State of Washington, have invented certain new and useful Improvements in Tire- Boots, of which the following is a specilication.

The present invention relates to improvements in tire boots, or reinforcing members for pneumatic tires and is designed pri marily for the purpose of providing a strong, flexible protection against blow-outs or the like, and is intended for use inside of a casing to cover a blow-out, fracture or weak place in the tire; l

Unlike common devices for this purpose my invention aims to maintain itself-against displacement, to hold the fracture together, to entirely relieve the injured portion of the 'casing from strain, and to prevent friction.

Further than this I have provided a boot or inner liner which will not injure the case whether of cord or fabric and which will take upon itself the entire pressure over the portion of the tire that it covers, thus relieving entire strain upon the injured portion of the casing. In addition, it is so constructed that a portion of it is prevented from entering a fracture or blowout and becoming pinched or worn from friction with the edges of the blow-out and thus in turn becominlgI weakened and failing 'to serve its purpose.

A. prime feature 4of my invention residesl of the yinventioniis illustrated vsl'lovving the manner of -construction and position, assumed to protect a casing and its tube against blow-outs according to the best mode so far devised for the practical application of the' principles of the invention.

Figurel is a perspective View of my tire boot or liner showing the surface thereof covered with projecting spurs or points.

Fig. 2 is a cross section through a casing and rim indicating the manner of placing the boot Within the casing to reinforce the same. l

Fig. 3 is a plan view of a fragment of the metal spur supporting structure which is constructed in. my boot and becomes apart thereof. i

In the embodiment of the invention as illustrated in"the drawing the boot is specially adapted for.covering a fracture or blow-out of a casing, of maintaining itself in a fixed position, of eliminating friction by reason of its being fixed and of 1nain- 'taining the fracture or bloweout closed and free from strain. As the spurs will each and every one be forced into the inner body of the case by pressure of air Within ltho' tube, the spurs thus entering the casing will maintain the boot against expansion and the strain due 'to the pressure will be entirely placed upon said boot.

The numeral 1 indicates lthe outer casing with its rim 2, an inner tube 3 being used in the usual manner. The boot shown as a "whole at l is constructed of a strong fabric menrl'icr 5 and a similar but lighter fabric member' (l and between these two members a met-al lattice T whichis the preferred form that I have adopted. The lattice member 7 is provided at intervals to receive spurs 8 or points projecting outwardly and through, the vfabric The lattice 7 is intended to maintain the spur points against displacement, tipping or the like and is constructed of a light metal, preferably a resilient or spring metal, to which the studs 8 may be secured, or if preferred, the studs may be formed of the same metal and out of the same piece. The lattice structure 7 consists primarily of base members 9 and connecting bars 10, the base member 9 receiving the oints 8 a'ndvhaving a substantial base or aring. The connecting bars l() are coniparatively narrowf and form connections between the .'basemembers 9 which will be 'essentially flexible andv allow the lattice structure to conform to the shape intended for L,the boot.

The outer after the in supporting lattice is in place, are inten ed to be vulcanized or cemented together so that no Inetal parts can come in contact with the inner tube 3 to rust or other- Wise, injure the tube.Y y

When the boot is constructed as described it .may be inserted into a case under a blowfabric 5 and inner fabric 6,v

. pressure it will be evident that before the eXtreme air pressure necessary for infiating the tire has been reached, 'the tire will be relieved over the area covered by the boot and the boot `will absorb the' strain. The fabric itself being made of a reasonably strong material will absorb a part, but the main strain will be taken up by the metal lattice embedded between the 'boot fabrics which will be placed under a certain tension that will prevent the boot itself from being forced into the opening 0r fracture in the tire, this in itself preventing wear on the boot owing to friction and contact with the load and at the same time the fracture will be held closed in the saine manner as when the tire was deflated.

By using a. great number of small, fine pointed spurs I am enabled not only to eliminate friction between the casing or tire,

and the boot, but to evenly distribute the strain over the entire boot and the spurs will each support a portion of t-he casing to prevent shifting or stretching. The spurs over the outer area of the boot will engage the undamaged part of the casing and transfer the strains to the boot. The spurs in the central area will keep the cut closed and prevent friction and heating.

l. The combination with a tire casing of a reinforcing boot comprising an outer fabrie layer and an inner fabric layer, of a metallic reinforcing element adapted to eooperate with said outer and inner fabric layers and interposed therebetween, said ele ment consisting of a thin, durable flexible body pierced at intervals and forming a lat tice-like structure with spaced base members and connecting 'bars between, metallic spurs arranged on said base members and extend` ing through the outer layer of fabric and adapted to pierce the inner wall of the casing.

2. The combination with a tire casing, of a reinforcing boot comprising an outer fabric layer and an inner fabric layer, of an open work flexible metallic structure .be tween said fabrics and adapted to vcooperate therewith, said structure comprising spaced integrally Connected bases having outstanding spurs thereon, said spurs passing out-- ward through the outer fabric structure and engaging the inner wall of the casing over =the entire area of the boot.

3, The combination with a fractured tire i casing, of a flexible boot comprising inner and outer layers, a series of integrally con' nected, closely spaced, metallic bases loe tween the layers and means for fastening the layers together, and radiating'spurs on the 'bases passing through the outer layer and piercing the inner wall of the casing closely adjacent the edges of the fracture. v

In testimony whereof I affixm si nature,

EDGAR M. l TE

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