US4246948A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pneumatic tire having a pneumatic safety insert with beads
Assignee: UG Licensing Services Inc
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Filing: 1979-06-14
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Granted: 1981-01-27
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Expires: 1999-06-14
Abstract
Abstract A pneumatic insert for a pneumatic tire comprises a generally toroidal-shaped hollow member having a pair of annular insert beads with sidewalls extending therefrom joined to an insert crown portion. Each insert bead has a foot portion with a projecting elastomeric formation at the bead heel to furnish an inner bead diameter at the heel that is less than the inner bead diameter at the toe. In at least one embodiment of the invention the bead heel projection is of triangular shape with a vertex of the triangle defining the first inner bead diameter. In another embodiment of the invention the projecting elastomeric formation extends axially away from the bead heel in a direction substantially parallel to the bead foot.
Inventors
- 👤 Berge Sarkissian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:47
CPC Classifications
B; B60; B60C; B60C17/00; B60C17/01; Y; Y10; Y10T; Y10T152/00; Y10T152/10; Y10T152/10495; Y10T152/10522; Y10T152/10576; Y10T152/10594; Y10T152/10819
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
207 words
A pneumatic insert for a pneumatic tire in combination with a wheel rim having an axis of rotation and an axially extending annular support surface, said insert comprising a generally toroidal-shaped hollow insert member with a pair of axially spaced annular insert beads arranged to be supported on the axially extending annular support surface with said tire, said insert including a pair of insert sidewalls extending generally radially outwardly from the insert beads, and an insert crown portion joining the insert sidewalls, said insert having a predetermined lateral stiffness to provide a predetermined axial spacing of said insert beads, said insert beads comprising, in cross-section, an outer wall, an inner wall and a foot portion extending between said inner and outer walls, said foot portion including a heel portion adjacent to said outer wall and a toe portion adjacent to said inner wall, said foot portion including an elastomeric projection formed at said heel portion and having a first inner diametrical magnitude that is less than a second inner diametrical magnitude of the toe portion, to permit compression of said elastomeric projection against the axially extending annular support surface of said rim to ensure formation of a leak-tight seal between the insert beads and the support surface.
Claim 2
Dependent Claim
207 words
A pneumatic insert for a pneumatic tire in combination with a wheel rim having an axis of rotation and an axially extending annular support surface, said insert comprising a generally toroidal-shaped hollow insert member with a pair of axially spaced annular insert beads arranged to be supported on the axially extending annular support surface with said tire, said insert including a pair of insert sidewalls extending generally radially outwardly from the insert beads, and an insert crown portion joining the insert sidewalls, said insert having a predetermined lateral stiffness to provide a predetermined axial spacing of said insert beads, said insert beads comprising, in cross-section, an outer wall, an inner wall and a foot portion extending between said inner and outer walls, said foot portion including a heel portion adjacent to said outer wall and a toe portion adjacent to said inner wall, said foot portion including an elastomeric projection formed at said heel portion and having a first inner diametrical magnitude that is less than a second inner diametrical magnitude of the toe portion, to permit compression of said elastomeric projection against the axially extending annular support surface of said rim to ensure formation of a leak-tight seal between the insert beads and the support surface.
Claim 3
Dependent Claim
21 words
A pneumatic insert as claimed in claim 1 wherein said foot portion is inclined with respect to said annular support surface.
Claim 4
Dependent Claim
28 words
A pneumatic insert as claimed in claim 1 wherein said elastomeric projection is of triangular shape with a vertex of said triangle defining said first interior diametrical magnitude.
Claim 5
Dependent Claim
49 words
A pneumatic insert as claimed in claim 3 wherein said foot portion has a median section, said vertex extending away from said median section in a first direction a first predetermined amount and said toe portion extending away from median section in a second direction a second predetermined amount.
Claim 6
Dependent Claim
17 words
A pneumatic insert as claimed in claim 4 wherein said first and second predetermined amounts are equal.
Claim 7
Dependent Claim
17 words
A pneumatic insert as claimed in claim 4 wherein said first and second predetermined amounts are unequal.
Claim 8
Dependent Claim
23 words
A pneumatic insert as claimed in claim 6 wherein said first predetermined amount is approximately twice the magnitude of said second predetermined amount.
Claim 9
Dependent Claim
48 words
A pneumatic insert as claimed in claim 6 wherein said first and second predetermined amounts are selected to permit said projection to fold between the median section of said foot and said support surface when said insert is mounted on said rim and inflated to a predetermined pressure.
Claim 10
Dependent Claim
20 words
A pneumatic insert as claimed in claim 3 wherein said foot portion is inclined with respect to said wheel axis.
Claim 11
Dependent Claim
26 words
A pneumatic insert as claimed in claim 9 wherein the angle of inclination of said foot portion is in the range of approximately 5° to 30°.
Claim 12
Dependent Claim
69 words
A pneumatic insert as claimed in claim 1 wherein said projection extends away from said heel portion a predetermined distance in an axial direction, said projection having a predetermined thickness in a radial direction with respect to said axis of rotation to permit folding of said projection between said bead foot and said support surface when said insert is mounted on said rim and inflated to a predetermined pressure.
Claim 13
Dependent Claim
25 words
A pneumatic insert as claimed in claim 11 wherein said predetermined distance and the axial extent of said bead foot are of substantially equal magnitude.
Claim 14
Dependent Claim
28 words
A pneumatic insert as claimed in claim 11 wherein said foot portion is inclined with respect to said wheel axis from said toe portion to said heel portion.
Claim 15
Dependent Claim
26 words
A pneumatic insert as claimed in claim 13 wherein the angle of inclination of said foot portion is in the range of approximately 5° to 20°.
Claim 16
Dependent Claim
22 words
A pneumatic insert as claimed in claim 11 wherein said projection normally extends in a direction substantially parallel to said bead foot.
Claim 17
Dependent Claim
20 words
A pneumatic insert as claimed in claim 1 wherein said bead includes a bead ring formed of helically wound fiber.
Claim 18
Dependent Claim
21 words
A pneumatic insert as claimed in claim 16 wherein said fiber is selected from the group consisting of steel and aramid.
Claim 19
Dependent Claim
37 words
A pneumatic insert as claimed in claim 1 wherein said bead includes a bead ring comprised of predetermined lengths of fiber embedded in a plastic medium, said fibers being oriented circumferentially with respect to the wheel axis.
Claim 20
Dependent Claim
22 words
A pneumatic insert as claimed in claim 18 wherein said fiber is selected from the group consisting of steel, aramid and glass.
Claim 21
Dependent Claim
24 words
A pneumatic insert as claimed in claim 18 wherein said fiber is of relatively short length with respect to the circumference of said bead.
Claim 22
Dependent Claim
19 words
A pneumatic insert as claimed in claim 18 wherein said fiber is continuous around the circumference of said bead.
Claim 23
Dependent Claim
26 words
A pneumatic insert as claimed in claim 18 wherein said plastic medium is selected from the group consisting of polyester, polypropylene, high modulus polyurethane and thermoplastic.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-01-27 | 1984-07-28 | 1985-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-01-27 | 1988-07-28 | 1989-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-01-27 | 1992-07-28 | 1993-01-27 | $7700.00 | Window Closed / Lapsed |