US3644162A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tire-building drum
Assignee: Goodyear Tire and Rubber Co
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Filing: 1970-07-06
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Granted: 1972-02-22
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Expires: 1990-07-06
Abstract
Abstract A tire-building drum of the collapsible type having a plurality of segments which, in the expanded condition of the drum, collectively form a tire-building surface. Radial movement of the segments between the expanded and collapsed condition of the drum is controlled by two sets of links one of which set has a through center toggle action as the segments associated therewith move into or out of expanded condition. The segments are guided in their radial movement by pistons mounted on the segments and received in cylinders which are fixed relative to the drum shaft. In the expanded condition of the drum, the links are contained within the pistons to provide a compact structure. 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 drawing and the following detailed description.
Inventors
- 👤 Paul E Appleby
- 👤 Denver C Folden
- 👤 Robert S Riggs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:30
CPC Classifications
B; B29; B29D; B29D30/00; B29D30/06; B29D30/08; B29D30/20; B29D30/24
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
221 words
A collapsible tire-building drum comprising an elongated rotatable shaft; a first series of segments disposed in angularly spaced relation about the shaft and each having an arcuate external surface disposed concentrically of the shaft axis of rotation; a second series of segments disposed about said axis, the segments of said second series being interposed respectively between the segments of said first series and each having an arcuate external surface disposed concentrically of the shaft axis and forming with said external surfaces of the segments of said first series a continuous cylindrical building surface disposed concentrically of said axis; and means for effecting movement of said segments radially of said axis including a pair of links associated with each of said segments, one end of each link being pivotally connected to its respectively associated segment, a pair of members each movable longitudinally of said axis between first and second positions, the other ends of the links of each said pair thereof being pivotally connected respectively to said pair of members, the links associated with said first series of segments passing through center during movement of said members between their first and second positions, the links associated with said second series of segments being oncenter in the first position of said members, and means for simultaneously moving said members longitudinally of said axis.
Claim 2
Dependent Claim
221 words
A collapsible tire-building drum comprising an elongated rotatable shaft; a first series of segments disposed in angularly spaced relation about the shaft and each having an arcuate external surface disposed concentrically of the shaft axis of rotation; a second series of segments disposed about said axis, the segments of said second series being interposed respectively between the segments of said first series and each having an arcuate external surface disposed concentrically of the shaft axis and forming with said external surfaces of the segments of said first series a continuous cylindrical building surface disposed concentrically of said axis; and means for effecting movement of said segments radially of said axis including a pair of links associated with each of said segments, one end of each link being pivotally connected to its respectively associated segment, a pair of members each movable longitudinally of said axis between first and second positions, the other ends of the links of each said pair thereof being pivotally connected respectively to said pair of members, the links associated with said first series of segments passing through center during movement of said members between their first and second positions, the links associated with said second series of segments being oncenter in the first position of said members, and means for simultaneously moving said members longitudinally of said axis.
Claim 3
Dependent Claim
43 words
A tire-building drum as claimed in claim 1, in which the pivotal axes of each link associated with said second series of segments are spaced apart a distance greater than the pivotal axes of said links associated with said first series of segments.
Claim 4
Dependent Claim
87 words
A tire-building drum as claimed in claim 1, wherein each segment includes a base and a pair of shell members disposed radially outwardly of the base with the shell members being disposed on opposite sides of the circumferential centerline of the drums, means for releaseably connecting each pair of shell members to its base and for varying the position of said shell members longitudinally of said axis, a replaceable spacer disposed between each pair of shell members, and releasable means mounting each spacer to its respective base.
Claim 5
Dependent Claim
51 words
A tire-building drum as claimed in claim 1, in which each segment of said first series thereof has a pair of edge portions extending parallel to said axis and overlapping the next edge portions of the segments of said second series thereof when said members are in said first position thereof.
Claim 6
Dependent Claim
55 words
A tire building drum as claimed in claim 1, further comprising a central hub fixed relative to said shaft, said hub having a pair of cylinders respectively associated with each segment, a pair of pistons respectively received in each pair of cylinders, each pair of pistons being fixed for movement with one of said segments.
Claim 7
Dependent Claim
132 words
A tire building drum as claimed in claim 5, in which said cylinders extend radially of said axis and each respectively associated pair of cylinders are aligned in a plane containing said axis, said hub being provided with a slot associated with each said cylinder, each slot extending parallel to the longitudinal axis of the cylinder and opening into the cylinder, each piston having a slot aligned with the slot in the cylinder in which it is received, one of said links being disposed within the slot in each of saId pistons and being aligned with the slots in the piston and associated cylinder, said slots lying in planes extending at right angles to the pivotal axes of said links and being of a width greater than the thickness of said links.
Claim 8
Dependent Claim
24 words
A tire-building drum as claimed in claim 6, in which said one end of each link is pivotally mounted on its respectively associated piston.
Claim 9
Dependent Claim
63 words
A tire building drum as claimed in claim 6, wherein said cylinders are in a pair of portions of the hub which are spaced radially outwardly of said shaft, each said member including a plurality of portions projecting between one of said portions of the hub and the shaft, the other end of the links being pivotally mounted respectively on said projecting portions.
Claim 10
Dependent Claim
43 words
A tire-building drum as claimed in claim 8, in which the pivotal axes of each link associated with said second series of segments are spaced apart a distance greater than the pivotal axes of said links associated with said first series of segments.
Claim 11
Dependent Claim
208 words
A tire-building drum comprising an elongated shaft, a hub coaxially disposed about the shaft and fixed relative thereto, a plurality of segments disposed about the shaft radially outwardly of said hub, said hub being provided with a pair of cylinders respectively associated with each segment, the pairs of cylinders being spaced apart angularly about the shaft axis with the cylinders of each pair being aligned in a plane containing the shaft axis and extending radially of said axis, a piston received in each said cylinder and fixed at one end relative to the respectively associated segment, said hub being provided with a plurality of slots respectively associated with said cylinders, said slots extending parallel to the axis of the cylinders and respectively opening thereinto, each piston having a slot extending parallel to and communicating with the slot in the respective cylinder, a link extending longitudinally of and received within each piston in alignment with the slots in the piston and cylinder, each link having a thickness less than the width of the slots in the respective piston and cylinder, one end of each link being pivotally connected to the respectively associated segment, and means for simultaneously moving the other ends of said links longitudinally of the shaft axis.
Claim 12
Dependent Claim
208 words
A tire-building drum comprising an elongated shaft, a hub coaxially disposed about the shaft and fixed relative thereto, a plurality of segments disposed about the shaft radially outwardly of said hub, said hub being provided with a pair of cylinders respectively associated with each segment, the pairs of cylinders being spaced apart angularly about the shaft axis with the cylinders of each pair being aligned in a plane containing the shaft axis and extending radially of said axis, a piston received in each said cylinder and fixed at one end relative to the respectively associated segment, said hub being provided with a plurality of slots respectively associated with said cylinders, said slots extending parallel to the axis of the cylinders and respectively opening thereinto, each piston having a slot extending parallel to and communicating with the slot in the respective cylinder, a link extending longitudinally of and received within each piston in alignment with the slots in the piston and cylinder, each link having a thickness less than the width of the slots in the respective piston and cylinder, one end of each link being pivotally connected to the respectively associated segment, and means for simultaneously moving the other ends of said links longitudinally of the shaft axis.
Claim 13
Dependent Claim
27 words
A tire building drum as claimed in claim 10, in which said one end of each of said links is pivotally mounted on the respectively associated piston.
Claim 14
Dependent Claim
113 words
A tire-building drum as claimed in claim 11, in which said means for moving the other ends of said links comprises a pair of members movable longitudinally thereof, the other end of one link of each pair being associated with one of said members, the other end of the other link of each pair being associated with the other of said members, said cylinders being contained within a pair of portions of said hub which are spaced radially outwardly of said shaft, each of said members having a plurality of projections extending between said portions of the hub and said shaft, the other ends of said links being pivotally mounted on said projections.
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) | 1975-02-21 | 1975-08-23 | 1976-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-21 | 1979-08-23 | 1980-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-21 | 1983-08-23 | 1984-02-22 | $7700.00 | Window Closed / Lapsed |