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US3816218A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tire building drum
Assignee: Goodyear Tire and Rubber Co
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Filing: 1972-03-29
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Granted: 1974-06-11
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Expires: 1992-03-29
Abstract
Abstract A tire building machine including a drum having a set of radially movable segments at each end thereof and being covered with a cord reinforced rubber sleeve, a set of radially movable fingers are disposed adjacent the axially outer ends of the drum and an auxiliary drum including a turn-up bladder is disposed axially outwardly of each set of fingers. The drum is axially contractible and radially expansible A pair of coaxially arranged pistons each having a conical surface is associated with each set of fingers and segments on each end of the drum for moving the fingers into gripping relation with and a tire bead with a predetermined force and for moving the segments to a predetermined diameter. The foregoing abstract is not to be taken as limiting the invention of this application, and in order to understand the full nature and extent of the technical disclosure of this application, reference must be made to the accompanying drawings and the following detailed description.
Inventors
- 👤 G Felten
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:10
CPC Classifications
B; B29; B29D; B29D30/00; B29D30/06; B29D30/08; B29D30/20; B29D30/32; B29D2030/3214
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
118 words
A tire building machine comprising a drum of a generally cylindrical configuration and having end portions which are radially expandable from a first diameter to a second diameter, bead gripping means disposed axially outwardly of and closely adjacent each end of the drum, each bead gripping means being expandable from a first diameter not substantially greater than the first diameter of said end portions to a second diameter substantially smaller than the second diameter of said end portions, and a pair of cams for expanding each said bead gripping means prior to expansion of said end portions, one cam of said pair of cams being wedgingly associated with said bead gripping means when said gripping means is expanded.
Claim 2
Dependent Claim
118 words
A tire building machine comprising a drum of a generally cylindrical configuration and having end portions which are radially expandable from a first diameter to a second diameter, bead gripping means disposed axially outwardly of and closely adjacent each end of the drum, each bead gripping means being expandable from a first diameter not substantially greater than the first diameter of said end portions to a second diameter substantially smaller than the second diameter of said end portions, and a pair of cams for expanding each said bead gripping means prior to expansion of said end portions, one cam of said pair of cams being wedgingly associated with said bead gripping means when said gripping means is expanded.
Claim 3
Dependent Claim
55 words
A machine as claimed in claim 1, wherein said pair of cams includes a pair of conical surfaces movable axially of the drum and relative to each other, said conical surfaces being operably associated with said bead gripping means to expand said bead gripping means when said conical surfaces are moved axially of said drum.
Claim 4
Dependent Claim
77 words
A machine as claimed in claim 1, further including means at each end of the drum forming an annular chamber disposed coaxially of the drum axis, a first and second piston disposed in each said chamber, said second piston being disposed coaxially about said first piston, the firsT cam of said pair of cams mounted for movement with said first piston and the second cam of said pair of cams mounted for movement with said second piston.
Claim 5
Dependent Claim
69 words
A machine as claimed in claim 3, wherein said first cam comprises a first conical surface and said second cam comprises a second conical surface with the radially outermost edge of said first conical surface having a diameter substantially equal to the diameter of the radially innermost edge of said second conical surface and further including means for locating said radially outermost edge closely adjacent said radially innermost edge.
Claim 6
Dependent Claim
46 words
A machine as claimed in claim 4, wherein said means for locating includes means associated with said pistons to limit the axial movement of said second piston relative to said first piston and prevent said second conical surface from moving axially over said first conical surface.
Claim 7
Dependent Claim
54 words
A machine as claimed in claim 5, further including means for exerting a predetermined axial force on said pistons to move said pistons axially of the drum and expand said bead gripping means, the radially outward movement of said bead gripping means thereby resulting in a predetermined gripping force being exerted on said bead.
Claim 8
Dependent Claim
54 words
A machine as claimed in claim 3, wherein one cam of said pair of cams effects the expansion of the end portion adjacent to the respective bead gripping means to said second diameter and further including means for restricting the radial expansion of said end portion during the expansion of said bead gripping means.
Claim 9
Dependent Claim
28 words
A machine as claimed in claim 7, further including means for stopping the axial movement of said first piston when said end portion expands to a predetermined diameter.
Claim 10
Dependent Claim
69 words
A machine as claimed in claim 8, wherein said first cam comprises a first conical surface and said second cam comprises a second conical surface with the radially outermost edge of said first conical surface having a diameter substantially equal to the diameter of the radially innermost edge of said second conical surface and further including means for locating said radially outermost edge closely adjacent said radially innermost edge.
Claim 11
Dependent Claim
46 words
A machine as claimed in claim 9, wherein said means for locating includes means associated with said pistons to limit the axial movement of said second piston relative to said first piston and prevent said second conical surface from moving axially over said first conical surface.
Claim 12
Dependent Claim
61 words
A machine as claimed in claim 9, further including means for exerting a predetermined axial force on said pistons to move said pistons axially of the drum and expand said bead gripping means and said end portions, the radially outward movement of said bead gripping means being limited by the bead surrrounding said bead gripping means thereby resulting in a predetermined
Claim 13
Dependent Claim
99 words
In a tire building machine of the type including a drum of generally cylindrical configuration and having radially expandable end portions and radially expandable bead gripping means disposed axially outwardly of and closely adjacent each end of the drum, the improvement comprising a pair of cams movable axially of the drum to radially expand each said bead gripping means, said cams being operably associated with said bead gripping means such that the axial movement of one of said cams is stopped by the reaction force of the bead gripping means engaging a bead ring with a predetermined gripping force.
Claim 14
Dependent Claim
99 words
In a tire building machine of the type including a drum of generally cylindrical configuration and having radially expandable end portions and radially expandable bead gripping means disposed axially outwardly of and closely adjacent each end of the drum, the improvement comprising a pair of cams movable axially of the drum to radially expand each said bead gripping means, said cams being operably associated with said bead gripping means such that the axial movement of one of said cams is stopped by the reaction force of the bead gripping means engaging a bead ring with a predetermined gripping force.
Claim 15
Dependent Claim
47 words
The improvement as claimed in claim 12, wherein each cam includes a conical surface movable axially of the drum each said conical surface being operably associated with said bead gripping means to expand said bead gripping means when each said cam is moved axially of the drum.
Claim 16
Dependent Claim
84 words
The improvement as claimed in claim 13, further including means at each end of the drum forming an annular chamber disposed coaxially of the drum, a first and second piston disposed in each said chamber said second piston being disposed coaxailly about said first piston and wherein a first cam of sAid pair of axially movable cams is mounted for movement with said first piston and a second cam of said pair of axially movable cams is mounted for movement with said second piston.
Claim 17
Dependent Claim
69 words
The improvement as claimed in claim 14, wherein said first cam comprises a first conical surface and said second cam comprises a second conical surface with the radially outermost edge of said first conical surface having a diameter substantially equal to the diameter of the radially innermost edge of said second conical surface and further including means for locating said radially outermost edge closely adjacent said radially innermost edge.
Claim 18
Dependent Claim
46 words
The improvement as claimed in claim 15, wherein said means for locating includes means associated with said pistons to limit the axial movement of said second piston relative to said first piston and prevent said second conical surface from moving axially over said first conical surface.
Claim 19
Dependent Claim
27 words
The improvement as claimed in claim 16, further including means for preventing the radial expansion of said end portions during the expansion of said bead gripping means.
Claim 20
Dependent Claim
68 words
The improvement as claimed in claim 17, further including means for exerting a predetermined axial force on said pistons to move said pistons axially of the drum and expand said bead gripping means and said end portions, the radially outward movement of said bead gripping means being limited by the bead surrounding said bead gripping means thereby resulting in a predetermined gripping force being exerted on said bead.
Claim 21
Dependent Claim
31 words
The improvement as claimed in claim 18, further including means for limiting the axial movement of said first piston to limit the expansion of said end portions to a predetermined diameter.
Claim 22
Dependent Claim
42 words
The improvement as claimed in claim 19, wherein the included angle between said first conical surface and the rotational axis of the drum is the same as the included angle between said second conical surface and the rotational axis of the drum.
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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) | 1977-06-10 | 1977-12-10 | 1978-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-10 | 1981-12-10 | 1982-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-10 | 1985-12-10 | 1986-06-11 | $7700.00 | Window Closed / Lapsed |