Patent US3877503A successfully refreshed from Google Patents.
US3877503A
Expired / Lapsed
US
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Method for anchoring a pneumatic tire to the rim and pneumatic wheel so obtained
Assignee: Industrie Pirelli SpA
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Filing: 1973-05-22
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Granted: 1975-04-15
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Expires: 1993-05-22
Abstract
Abstract A pneumatic wheel for vehicles including a tire provided with a tread, two sidewalls and two beads and a rim with two seats, one for each bead. Each seat has the shape of a circumferential channel having an opening for the introduction of each bead in its seat. The width of the opening is smaller than the maximum width of the seat. Each bead has in cross-section a profile at least partially equal to that of the corresponding seat of the rim and is substantially indeformable. The cross-section of the bead is smaller than the cross-section of the seat. Each bead is locked in its seat by an element having a modulus of resistance to compression of the same order of magnitude as that of the compound forming the beads and which makes coincident the partially equal profiles. The tire is anchored to the rim by introducing the element into the seat on the rim after the introduction of the bead so as to press the surface of the bead against the surface of the corresponding seat.
Inventors
- 👤 Giorgio Tangorra
- 👤 Italo Bertelli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:44
CPC Classifications
B; B60; B60C; B60C15/00; B60C15/02; B60C15/0209; B60C15/0213; B60B; B60B21/00; B60B21/10; B60C15/022; B60C15/024; B60C15/0247; Y; Y10; Y10T; Y10T152/00; Y10T152/10; Y10T152/10495; Y10T152/10819
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
192 words
A pneumatic wheel for vehicles, which comprises: a tire provided with a tread, two sidewalls, and two beads, a rim with two seats, one for each bead, each seat having the shape of a circumferential channel with an opening for the introduction of each bead in the respective seat, the two ends of said opening being directed the one against the other, whereby the width of said opening is smaller than the maximum width of said seat, each bead having in cross-section a profile at least partially equal to that of the corresponding seat of the rim and substantially indeformable, said cross-section being smaller than the cross-section of said seat, and an additional forcing element being inserted between the outermost end of said opening and an underlying portion of the bead, whereby said two ends of the opening surround on one side at least a part of said cross-sectional profile of the bead to lock said bead in its own channel, the material of said additional element having a modulus of resistance to compression which is of the same order as that of the compound forming the beads or higher than it.
Claim 2
Dependent Claim
192 words
A pneumatic wheel for vehicles, which comprises: a tire provided with a tread, two sidewalls, and two beads, a rim with two seats, one for each bead, each seat having the shape of a circumferential channel with an opening for the introduction of each bead in the respective seat, the two ends of said opening being directed the one against the other, whereby the width of said opening is smaller than the maximum width of said seat, each bead having in cross-section a profile at least partially equal to that of the corresponding seat of the rim and substantially indeformable, said cross-section being smaller than the cross-section of said seat, and an additional forcing element being inserted between the outermost end of said opening and an underlying portion of the bead, whereby said two ends of the opening surround on one side at least a part of said cross-sectional profile of the bead to lock said bead in its own channel, the material of said additional element having a modulus of resistance to compression which is of the same order as that of the compound forming the beads or higher than it.
Claim 3
Dependent Claim
19 words
The pneumatic wheel as in claim 1, in which the additional element is constituted by a circumferentially extensible ring.
Claim 4
Dependent Claim
30 words
The pneumatic wheel as in claim 1, in which the additional element is constituted by a series of sector-shaped members arranged in circumferential direction and spaced apart from one another.
Claim 5
Dependent Claim
19 words
The pneumatic wheel as in claim 2, in which the material forming said additional element is a rubber compound.
Claim 6
Dependent Claim
19 words
The pneumatic wheel as in claim 3, in which the material forming said additional element is a synthetic polymer.
Claim 7
Dependent Claim
17 words
The pneumatic wheel as in claim 3, in which the material forming said additional element is metal.
Claim 8
Dependent Claim
41 words
The pneumatic wheel as in claim 1, in which each seat of the rim into which is encased the corresponding bead has its opening turned in a radially outer direction with respect to the axis of rotation of the pneumatic wheel.
Claim 9
Dependent Claim
30 words
The pneumatic wheel as in claim 1, in which each seat of the rim encasing the corresponding bead has its opening turned towards the inner concavity of the pneumatic wheel.
Claim 10
Dependent Claim
38 words
The pneumatic wheel as in claim 1, in which the thickness of each seat of the rim encasing the corresponding bead defines at least one slit situated at the site of said additional element to permit its removal.
References Cited (Backward Citations)
US1939935A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-14 | 1978-10-14 | 1979-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-14 | 1982-10-14 | 1983-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-14 | 1986-10-14 | 1987-04-15 | $7700.00 | Window Closed / Lapsed |