US3864189A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Building of pneumatic tire assemblies
Assignee: Semperit AG Holding
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Filing: 1972-02-22
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Granted: 1975-02-04
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Expires: 1992-02-22
Abstract
Abstract A method of building a pneumatic tire assembly is described in which a partial assembly comprising the bead cores and carcass is built on a building drum using the known flat drum procedure; the partial assembly is then given the required profile solely by means of a pressurized fluid, the supporting surface of the drum being drawn inwardly as the tire beads are drawn towards one another; and the remainder of the tire assembly is then built up. Various forms of building drum for use in this method are also described.
Inventors
- 👤 Hans Galleithner
- 👤 Kurt Strauch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:30
CPC Classifications
B; B29; B29D; B29D30/00; B29D30/06; B29D30/36; B29D30/08; B29D30/20; B29D30/24; B29D30/244; B29D30/245; B29D30/26; B29D2030/2635; B29D2030/265
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
143 words
A building drum for fabricating a radial belted, pneumatic tire assembly comprising the combination of two parallel discs which are adapted to be moved coaxially with respect to one another, a flexible, fluid permeable support element mounted on said discs to define an annular chamber for receiving thereon a partial tire assembly including bead cores and a carcass, means for supplying a pressurized fluid to the interior of said annular chamber and means for deflecting said support element radially inward, whereby the partial tire assembly is deflected radially outward when the pressurized fluid passes through said support element to thereby act directly on the interior surface of the partial tire assembly and further including means comprising a plurality of retaining members secured to the interior surface of said support element and at least one prestressed, annular spring member threaded through said retaining members.
Claim 2
Dependent Claim
143 words
A building drum for fabricating a radial belted, pneumatic tire assembly comprising the combination of two parallel discs which are adapted to be moved coaxially with respect to one another, a flexible, fluid permeable support element mounted on said discs to define an annular chamber for receiving thereon a partial tire assembly including bead cores and a carcass, means for supplying a pressurized fluid to the interior of said annular chamber and means for deflecting said support element radially inward, whereby the partial tire assembly is deflected radially outward when the pressurized fluid passes through said support element to thereby act directly on the interior surface of the partial tire assembly and further including means comprising a plurality of retaining members secured to the interior surface of said support element and at least one prestressed, annular spring member threaded through said retaining members.
Claim 3
Dependent Claim
32 words
The building drum as claimed in claim 1 wherein said support element is a sleeve having a smaller thickness at its central zone than at its edge zones immediately adjacent said discs.
Claim 4
Dependent Claim
31 words
A building drum as claimed in claim 1, wherein said support element is a flexible sleeve having a plurality of apertures therein, the distribution of which varies in the axial direction.
Claim 5
Dependent Claim
26 words
A Building drum as claimed in claim 1, wherein said support element is a flexible sleeve having a wall thickness which varies in the axial direction.
Claim 6
Dependent Claim
18 words
A building drum as claimed in claim 1, wherein said support element is flexible sleeve of elastomeric material.
Claim 7
Dependent Claim
24 words
A building drum as claimed in claim 5, wherein said flexible sleeve is provided at least in part with at least one reinforcing insert.
Claim 8
Dependent Claim
27 words
A building drum as claimed in claim 6, wherein said flexible sleeve is provided with at least one reinforcing insert in the form of a rigid body.
Claim 9
Dependent Claim
38 words
A building drum as claimed in claim 1, wherein said support element is in the form of a flexible sleeve having an external layer adapted to prevent the adhesion of a tire assembly to the sleeve during use.
Claim 10
Dependent Claim
24 words
A building drum as claimed in claim 1, wherein said support element is constituted by a covering of material formed of yarn or wire.
Claim 11
Dependent Claim
17 words
A building drum as claimed in claim 9, wherein the material of said covering is essentially non-elastic.
Claim 12
Dependent Claim
25 words
A building drum as claimed in claim 1, wherein said support element is constituted by a covering in the form of a plurality of chains.
Claim 13
Dependent Claim
18 words
A building drum as claimed in claim 1, wherein the axial dimension of said support element is adjustable.
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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) | 1978-02-03 | 1978-08-05 | 1979-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-03 | 1982-08-05 | 1983-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-03 | 1986-08-05 | 1987-02-04 | $7700.00 | Window Closed / Lapsed |