US3895668A — Pneumatic wheel

Claim 1

Independent Claim 247 words

A pneumatic wheel for motor vehicles comprising a pneumatic tire with a tread, an annular reinforcing structure, two sidewalls having a convexity in the meridian plane of their section midline directed toward the inside of the tire and so constructed that as a result of the inflation air they are subjected to compression and to bending and a rim connection zone being radially inner with respect to said sidewalls, said rim having a single seat for encasing said connection zone, said seat having the shape of a circumferential channel with an opening directed in a radially outer direction with respect to the axis of rotation of the pneumatic wheel, the width of said opening being smaller than the maximum width of said channel, said connection zone having a cross-sectional profile of a form equal to that of the profile of said channel, the profile of said connection zone being enclosed by the profile of said channel, and the cross section of said connection zone being no smaller than the cross section of said channel; the cross section of said tire having a shape approximately that of an isosceles triangle whose base is represented by the chord subtending the annular reinforcing structure, the sides being represented by the chords subtending the respective section midlines of the sidewalls which are wholly internal to the sides of said triangle, the vertex comprised between said sides lying on the tire midline in said connection zone between the tire and the rim.

Claim 2

Dependent Claim 247 words

A pneumatic wheel for motor vehicles comprising a pneumatic tire with a tread, an annular reinforcing structure, two sidewalls having a convexity in the meridian plane of their section midline directed toward the inside of the tire and so constructed that as a result of the inflation air they are subjected to compression and to bending and a rim connection zone being radially inner with respect to said sidewalls, said rim having a single seat for encasing said connection zone, said seat having the shape of a circumferential channel with an opening directed in a radially outer direction with respect to the axis of rotation of the pneumatic wheel, the width of said opening being smaller than the maximum width of said channel, said connection zone having a cross-sectional profile of a form equal to that of the profile of said channel, the profile of said connection zone being enclosed by the profile of said channel, and the cross section of said connection zone being no smaller than the cross section of said channel; the cross section of said tire having a shape approximately that of an isosceles triangle whose base is represented by the chord subtending the annular reinforcing structure, the sides being represented by the chords subtending the respective section midlines of the sidewalls which are wholly internal to the sides of said triangle, the vertex comprised between said sides lying on the tire midline in said connection zone between the tire and the rim.

Claim 3

Dependent Claim 26 words

The pneumatic wheel of claim 1 wherein said connection zone is constituted by two beads, whose axially innermost surfaces are at least in partial mutual contact.

Claim 4

Dependent Claim 20 words

The pneumatic wheel of claim 2 wherein the surface of contact lies on the equatorial plane of the pneumatic wheel.

Claim 5

Dependent Claim 14 words

The pneumatic wheel of claim 2 wherein the contact between the surfaces is airtight.

Claim 6

Dependent Claim 13 words

The pneumatic wheel of claim 2 wherein said beads have symmetrical section profiles.

Claim 7

Dependent Claim 28 words

The pneumatic wheel of claim 2 wherein the ratio between the cross section of the two joined beads and the channel cross section is from 1 to 1.4.

Claim 8

Dependent Claim 28 words

The pneumatic wheel of claim 1 wherein the ratio between the width of the opening and the maximum section width of said channel is from 0.3 to 0.9.

Claim 9

Dependent Claim 54 words

The pneumatic wheel of claim 7 wherein the channel section profile comprises two walls converging toward the radially innermost zone and further wherein the lines joining each axially outermost point of said profile with the radially innermost point form an angle of from 30* to 70* with respect to the rim axis of rotation.

Claim 10

Dependent Claim 21 words

The pneumatic tire of claim 8 wherein each wall is symmetrically inclined with respect to the median axis of the rim.

Claim 11

Dependent Claim 34 words

The pneumatic tire of claim 1 wherein said channel is circumferentially divided into two parts, the first constituting the flange for connection to the hub and the second being boltedly connected to the first.

Claim 12

Dependent Claim 158 words

A pneumatic tire for vehicles comprising a tread, sidewalls extending radially inwardly from the tread and convex with respect to the interior of the tire when unDer inflation pressures, and beads around the innermost edges of the sidewalls which are adapted to cooperate with a rim of corresponding cross-sectional shape to removably secure the tire to a vehicle wheel, said beads having surfaces integral with the inner surfaces of the sidewalls adapted to be pressed together when held by the rim to form a substantially fluid impervious seal therebetween and to join with the tread and sidewalls to enclose a cavity for fluid under pressure when the tire is inflated, said beads having annular external ribs adjacent to the points where they meet the sidewalls which are adapted to be gripped by a rim and external surfaces which converge from the ribs to the point where said inner surfaces of the beads abut when they are pressed together.

Claim 13

Dependent Claim 158 words

A pneumatic tire for vehicles comprising a tread, sidewalls extending radially inwardly from the tread and convex with respect to the interior of the tire when unDer inflation pressures, and beads around the innermost edges of the sidewalls which are adapted to cooperate with a rim of corresponding cross-sectional shape to removably secure the tire to a vehicle wheel, said beads having surfaces integral with the inner surfaces of the sidewalls adapted to be pressed together when held by the rim to form a substantially fluid impervious seal therebetween and to join with the tread and sidewalls to enclose a cavity for fluid under pressure when the tire is inflated, said beads having annular external ribs adjacent to the points where they meet the sidewalls which are adapted to be gripped by a rim and external surfaces which converge from the ribs to the point where said inner surfaces of the beads abut when they are pressed together.

Claim 14

Dependent Claim 31 words

The pneumatic tire of claim 11 wherein said converging surfaces of the beads impart a cross-sectional shape to the beads when pressed together which approximates the shape of an isosceles triangle.

Claim 15

Dependent Claim 33 words

The pneumatic tire of claim 11 in combination with a rim having an interior shape corresponding to the external shape of the beads when pressed together to form a substantially fluid impervious seal.

Claim 16

Dependent Claim 53 words

The pneumatic tire of claim 11 wherein the general cross-sectional shape thereof when installed on a rim resembles an isosceles triangle with the vertex at the external point where the inner surfaces of beads abut when pressed together and with the base extending through the thickness of the tread portion of the tire.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1978-07-21	1979-01-20	1979-07-22	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1982-07-21	1983-01-20	1983-07-22	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1986-07-21	1987-01-20	1987-07-22	$7700.00	Window Closed / Lapsed

Pneumatic wheel

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