Patent US3785905A successfully refreshed from Google Patents.
US3785905A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Equipment for building pneumatic tyres
Assignee: Individual
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Filing: 1971-06-28
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Granted: 1974-01-15
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Expires: 1991-06-28
Abstract
Abstract A mechanism for building in beads of pneumatic tires on a fixed tire building drum having at least one shoulder, in which there is provided a housing defined by a cylindrical support movable relative to the building drum, levers for compressing the ends of the cord plies against the drum shoulder, and an annular coil spring for turning over the cord ply ends, with the spring being secured on the levers serving to lift the spring. The levers for the compression of the cord ply ends and the lever for lifting the annular coil spring are hingedly secured with the possibility of axial rotation thereof on a common annular carrier or support axially movable relative to the body and the drum. The levers for the compression of the cord ply ends are pressed to the annular coil spring by the axial rotation of the levers with the aid of a template movable by a piston in an air cylinder-piston unit.
Inventors
- 👤 M Pinegina
- 👤 G Portny
- 👤 R Pukhova
- 👤 N Davidovich
- 👤 I Roitburd
- 👤 N Tsaplin
- 👤 V Rossin
- 👤 V Pinegin
- 👤 P Badenkov
- 👤 L Petrokas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:22
CPC Classifications
B; B29; B29D; B29D30/00; B29D30/06; B29D30/08; B29D30/10; B29D30/18; B29D30/20; B29D30/32; B29D2030/3221; B29D2030/3264
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
345 words
A mechanism for building in beads of pneumatic tires, including a fixed building drum having at least one shoulder, a body defined by a cylindrical support movable relative to the building drum, an annular support mounted on the body, first levers for pressing the ends of the cord plies against the at least one shoulder of the building drum, an annuLar coil spring serving to turn over the ends of the cord plies, second levers serving to lift the annular coil spring, the first and second levers being hingedly connected to the annular support with a possibility of axial rotation thereof, means for pressing the first levers for pressing the ends of the cord plies to the annular coil spring, thereby ensuring clamping of the cord plies between the first levers and the annular coil spring, a pneumatic cylinder-piston unit for effecting axial rotation of the second levers for lifting the annular coil spring, said cylinder being mounted in said body, and a template serving to set the bead core, the template being capable of moving axially relative to the building drum, the improvement that said annular support is movable axially relative to the body and the building drum, so that upon simultaneous movement of the annular support and axial rotation of the first and second levers with the ends of the cord plies clamped between the annular coil spring and the first levers, the ends of the cord plies are compressed along the profile of said at least one shoulder of the building drum, the means for pressing the first levers for pressing the ends of the cord plies against the annular coil spring comprising a further pneumatic cylinder, said further pneumatic cylinder being mounted on said annular support, a piston for the further pneumatic cylinder, and a template rigidly mounted on said last-named piston, the first levers for pressing the ends of the cord plies having ends supported on the surface of the template whereby during movement of the template, the first levers are turned axially and pressed against the annular coil spring.
Claim 2
Dependent Claim
345 words
A mechanism for building in beads of pneumatic tires, including a fixed building drum having at least one shoulder, a body defined by a cylindrical support movable relative to the building drum, an annular support mounted on the body, first levers for pressing the ends of the cord plies against the at least one shoulder of the building drum, an annuLar coil spring serving to turn over the ends of the cord plies, second levers serving to lift the annular coil spring, the first and second levers being hingedly connected to the annular support with a possibility of axial rotation thereof, means for pressing the first levers for pressing the ends of the cord plies to the annular coil spring, thereby ensuring clamping of the cord plies between the first levers and the annular coil spring, a pneumatic cylinder-piston unit for effecting axial rotation of the second levers for lifting the annular coil spring, said cylinder being mounted in said body, and a template serving to set the bead core, the template being capable of moving axially relative to the building drum, the improvement that said annular support is movable axially relative to the body and the building drum, so that upon simultaneous movement of the annular support and axial rotation of the first and second levers with the ends of the cord plies clamped between the annular coil spring and the first levers, the ends of the cord plies are compressed along the profile of said at least one shoulder of the building drum, the means for pressing the first levers for pressing the ends of the cord plies against the annular coil spring comprising a further pneumatic cylinder, said further pneumatic cylinder being mounted on said annular support, a piston for the further pneumatic cylinder, and a template rigidly mounted on said last-named piston, the first levers for pressing the ends of the cord plies having ends supported on the surface of the template whereby during movement of the template, the first levers are turned axially and pressed against the annular coil spring.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-14 | 1977-07-16 | 1978-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-14 | 1981-07-16 | 1982-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-14 | 1985-07-16 | 1986-01-15 | $7700.00 | Window Closed / Lapsed |