US1385653A - Tire construction - Google Patents

Description

0. ZANCAN.

TIRE CONSTRUCTION.

APPLICATION FILED APR. 15, 192e.-

1,385,653. f Patemuuly 26,1921.

UNIT-ED STATES PATENT oFElcE. y

oTTAvTo zANcAN, or yivnw YORK,l N. Y.

TIRE CONSTRUCTION.

Application flied April 15, 1920.A serial No. 374,035. f

To all whom t 'may-concern.

Be it known that I, OTTAvio ZANCAN, subject of theKing of Italy, residing at New York, countyA of NewrYork, State of New York, have invented new and useful Im provements in Tire Constructions,'of which the following is a specification.v p

'Iliis'invention relates to improvements in tire construction, pertaining-more particularly tostructures employing the usual-shoe or casingV andan inner inflatable structure.

Various types of tire formations have been contemplatedand employed, the form generally usedbeing that of an outer shoe, casing or tread structure of heavy material-generally fabricated-the casing 'being formed hollow to receive an inner tube, 'the walls of which are more or lessflexible, the tube being inflated, the inflation serving to cause the wallsof the tube to tightly contact the interiorof the casing and the rim formation after; the casing has been-seated, inflation. taking place' after the casing' has `been properly positioned. This provides a pneumatic.support for the casing, serving to absorb the shocks, etc., present Vin service.

v v Then the tube becomes leaky', as by puncturing, etc.,removal is required and another substituted, and this requires,.if substitution is made while .the wheel remainsjin position, .that the vehicle be' jacked upso as to re'- -move the casing from ofi' the ground, after which the holding ring is removed, the side .of -the shoe or casing drawn outward toy open the. interior, the deflated 'tuberemovech and the new tiibe-deflated-inserted in position, 'after which the reverse f operation takes place; The operation isaslow and a Vtedious one owing' to the difficultiesof: properly positioning the' inner tuberi, and the casing, in@ addition to which the l'jack manipulation both before and after is-required.

The present invention is `designed to overcome some ofV these difficulties' by changing the formof the .inner tube fromv that of an lendless type to that of a'close'd type, inthat the tube, while approaching they length of an endless tube, is less-than such length, the

Y'ends being closed. The `annular formation VVVof the 'tube when the latter is inflated; since of thefends.- ofthe tube serves to prevent creeping of the latter, thus eliminating the possibility of'placing a strain on the portion of the tube at the inflation nipple. The tube thus provides the pneumatic cushion r for the casing with the exception of that portion which lies between the ends of the tube, and as this isrelatively small as compared with the circumferential length of the casing, it does not materially affect the imilformity of support under service conditions, the partition .preferably having a formation which simulates the action of the pneumatic support in use. The major difference in result, however, is the presence of a portion of t-he casing support which. need not beremoved when substitution of one tube for another is required, this portion beingv suflicient to maintain the casing in proper position when the'partition lies in the vertical plane of the wheel axis and at the underside of the wheel. Hence, if the wheel be placed in this position there is no requirement for raising the casing from Athe ground. And this non-requirement of removal of the partition produces the result that it becomes unnecessary to release the casing at this point, so that the rim itselfmay be carried upon the outer side ofthe wheel for some. distance, thus providing a rigid support for thecas'- ing at this point, preventing liability ofthe shoe working loose at-theends of the tube..

rIfhis permits the usual holding ring'to be changed to a segmental element of a .length -to complete the ring with thisviixed. riml portion, it being possible to employ a cross-sectional form of segment to properly lit the casing, the incomplete ring'beingfcapableof ready' positioning and vsecuring in position; at the same time it can be removed bodily to expose a sufcient length of casing as to per` mit the substitution of the tubes without affecting that portion of the casing which is being supported by the partition.

VTo these and other ends, therefore, the nature of which will be readily yunderstood 4as the invention is hereinafter disclosed, said Finvention consists in the improved construction and combination of parts, hereinafter fully described, illustrated inthe accompanying drawings, and more particularly pointed out in the appended claims.

In the accompanying drawings,in which similar reference characters indicate similar parts in each of theviewsf-l Figure lisa side elevation of awheel showing one embodiment o'f the present invention applied thereto. Y,

Fig. 2 is a longitudinal section, taken through the tube-anchoring partition.

Fig. 3 is an elevation of the retaining segment.

Fig. 4 is a sectional view taken on line 4 4 of Fig. 1, the view being on an enlarged scale and the shoeand inner tube beinomitted.

ig. 5 is a perspective view of a supporting member for the tube-anchoring partition.

Fig. 6 is a perspective view of a member employed in securing the partition in place.

'In the drawing A indicates a wheel having a felly, a., this being of suitable form, the particular structure shown in the drawing being that of a detachable rim structure, the rim members aV and a2 being more or less of the usual type, these being held to position by the ring co3 and clamps a4. Rim member a2 is slightly varied in the present construction.

10 indicates a shoe or casing of the usual type, this being secured in position between the fixed flange of rim member ya2 and a twopart member of the opposite side, the part 11 being fxedly positioned-extending a certain angular distance of the circumferential length, of the casing, vthe remainder of this distance being taken up bythe member 11a which is detachably secured'in position by suitablemeans, such, for instanceas lugs 11'? adapted to pass throughopenings in rim member wz, as in Fig. 4. y

Theinner tube anchoring partition is indicated at 12 and shown somewhat in detail in Fig. 2, this being formed of resilient material in the main, and comprising al web portion 12a extending somewhat radially and from which extend the anchoring portions 12b these extending in opposite directions fromweb`12, As will'be seen, the outer walls of they anchoring portions are comparatively thin, while' the inner wall is provided with a bulging portion12, giving to the recess orpocket which forms the anchor an enlarged mouth, a contracted throat and an enlarged pocket formation beyond the throat, the end of the inner tube 13 being locatedV in thisenlargedpoclet formation. When the tube is inserted-deflated-and then inflated, it-'will be readily Vseen that bulge12cj will act-to prevent the tube reaching a 'diameteras great as that within the enlarged pocket, with the ,result vthat the tube 'endtakeson the form of an enlarged headwhichis prevented from being drawn out lof the pocket by the bulge 12. Since both ends of the tube are thus pocketed and anchored, the tube will be held against any tendencyto creep. Y

Thepartition web may be 'solid or it may, as shown inthe drawing, be provided with Having thus described an insertible member 121 of suitable. material.

The partition is secured in position by being secured to rim member a?, a member 14, shown in Fig. 5, having an inwardly-projecting portion 14a' adapted to extend into the partition in alinement with the web12a, said portion 14a being formed with an opening to receive the projecting portion 15a of a member 15 secured to the rim with portion 15a extending through an opening in the rim. Member 14 is located between the partition and the rim, and the partition is secured in place by a suitable bolt 16 having its head located in a recess of the web 12a and projecting throughy portion 15a, the outer end receiving a nut. Obviously, this form of securing the parts in position is more or less illustrative.

Since the outer walls of the anchoring pockets are relatively thin, it will be understood that if the tube becomes deflated under service conditions, thereis less likelihood of the structure'becoming damaged by the traveling on a flat tire; invaddition, there vis less liability to bumping.under such conditions; f Y

With the shoe orcasing in position, it is necessary only to place the wheel in position where the web 12n is at the bottom of the wheel and in the verticalplaneof the wheel axis, and remove member 11a, this member having v`an angular length to overlap the mouths of both pockets. This permits the casing to be opened out sufficiently to remove the deated tube and insert a new tube-in deflated condition-the ends ofthe tube being Vpushed into the pockets, the infiating tube being, ofl course,'properly positioned. 'The casing is then restored, member 11a returned to position and the tube inflated. During this operation, the casing is held in positionv by the fixed section 11, which also serves to' strengthen l,the structure in the vicinity of the partition during service.

VVhile'I/havev herein shown and described a preferred arrangement of parts, it will be readily understood thatchanges and'mo'dificationsV therein may be founddesirableor essential inmeeting the exigen'ciesof use, -and I desire, to` bel understood 'as reserving 'the right to make any and all such changes or modifications as maybe `founddesirable or essential, in so far as the same'may fall within the spirit'and scope of the'invention as expressed in the accompanying-claims, when broadly construed. f

my invention, what I claim as new is: g 4

1.l In tire' construction, anannular ,shoe creasing, an inner infiatable tube having closed ends, a memberl for anchoring the tube ends, vand detachable means for retaining the shoe orcasing in position'and adapted, When removed, to permit casing manipulation to substitute one tube for another.

2. In tire construction, an annular casing or shoe, an inner inflatable tube having closed ends, a rim, and a member fixed to the rim for anchoring the ends of the inflated tube.

3. In tire constructionJ an annular casing or shoe, an inner infiatable tube having closed ends, and a member for anchoring the tube ends, said member having a Web portion and anchoring pockets on opposite sides of the Web.

4. Tire construction of the type of claim 3 characterized in that the anchoring pockets have a configuration to form an anchoring pocket with a contracted throat leading thereto, whereby tube inflation Will produce contracted tube portions spaced from the tube ends.

5. An anchoring member for the ends of inner tubes comprising a ymember of resilient material having a Web portion and hollow portions extending from such Web portion in opposite directions, said extended portions having external configurations to fit Within the interior of a casing or shoe, the internal configurations of each hollow portion being adapted to produce a pocket to receive and anchor the inflated and closed end of a tube.

6. An anchoring member of the type of claim 5 characterized in that the internal configuration of each pocket includes a bulging portion spaced from the bottom of the pocket and adapted to produce a contraction in the iniiated end at a point spaced `from such end.

7. An anchoring member of the type of claim 5 characterized in that the member includes means for securing it in fixed position relative to a rim, With the means l0- cated at the Web portion of the member.

8. An anchoring member of the type of claim 5 characterized in. that the member includes means for securing it in fixed position relative to a rim, said means including an element underlying the pocket-containing portions and having side flanges to support member portions. v

In testimony whereof, I have signed my name to this specification in the presence of a subscribing Witness, this 12th day of April 1920.

OTTAVIO ZANCAN.

Witness :v

OSCAR CARLBERG.

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