US3767509A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drum for making radial tire carcasses
Assignee: Individual
•
Filing: 1971-08-05
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Granted: 1973-10-23
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Expires: 1991-08-05
Abstract
Abstract In this tire making drum comprising a central hollow shaft having slidably mounted thereon a pair of sockets to which equal crossed arms supporting curved pre-shaping segments covered with elastic lining material are pivoted, and a screw coaxial to said hollow shaft and engaging tapped holes of said sockets, a pair of annular flange units are disposed on either side of the median transverse plane of the drum and carry a bead clamp and means for folding the plies and like tire-making materials about said bead clamp, each curved pre-shaping segment comprises a detachable contour element mounted to a segment support provided with slots each engaged by a slide mounted to one of the arms of said segment support, as well as a pair of lugs adapted to move laterally and adjustably away from each other on either side of said segment support.
Inventors
- 👤 G Gazuit
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:02
CPC Classifications
B; B29; B29D; B29D30/00; B29D30/06; B29D30/36; B29D30/08; B29D30/20; B29D30/24; B29D30/244; B29D30/245; B29D30/32; B29D2030/3214; B29D2030/3221; B29D2030/3228; B29D2030/3235; B29D2030/3242; B29D2030/325; B29D2030/3264
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
264 words
Tire making drum comprising a hollow shaft, a pair of internally screw-threaded sockets slidably mounted on said hollow shaft, equal arms responsive to said sockets and crossing each other, curved pre-shaping curved segments supported by said arms and an elastic membrane covering said segments, a screw-mounted coaxially and rotatably in said hollow shaft and engaging the internally screw-threaded passages of said sockets, a pair of annular flange units slidably mounted on said hollow shaft and disposed on either side of said sockets, a bead clamp, a device for folding the elements of material for making the tire about said bead clamp, and means for controlling the sliding movements of said flange units along said hollow shaft, the radial movements of said bead clamp and the pivotal movements of said folding device, said means being carried by each one of said pair of flange units, wherein each curved pre-shaping segment consists of a main segment element having formed in its plane of symmetry a median rectilinear slot and, on either side of this first slot, two other transverse rectilinear slots, the two equal arms being pivoted to each other by means of a pivot pin acting between these two arms as a slide engaging said median slot whereas the arm ends opposed to those pivoted to said sockets are pivotally mounted to slides engaging said transverse rEctilinear slots, said main segment element being provided with a pair of lugs adapted to be moved laterally away from each other, on either side of said segment support, and a detachable contour element mounted to said segment support.
Claim 2
Dependent Claim
264 words
Tire making drum comprising a hollow shaft, a pair of internally screw-threaded sockets slidably mounted on said hollow shaft, equal arms responsive to said sockets and crossing each other, curved pre-shaping curved segments supported by said arms and an elastic membrane covering said segments, a screw-mounted coaxially and rotatably in said hollow shaft and engaging the internally screw-threaded passages of said sockets, a pair of annular flange units slidably mounted on said hollow shaft and disposed on either side of said sockets, a bead clamp, a device for folding the elements of material for making the tire about said bead clamp, and means for controlling the sliding movements of said flange units along said hollow shaft, the radial movements of said bead clamp and the pivotal movements of said folding device, said means being carried by each one of said pair of flange units, wherein each curved pre-shaping segment consists of a main segment element having formed in its plane of symmetry a median rectilinear slot and, on either side of this first slot, two other transverse rectilinear slots, the two equal arms being pivoted to each other by means of a pivot pin acting between these two arms as a slide engaging said median slot whereas the arm ends opposed to those pivoted to said sockets are pivotally mounted to slides engaging said transverse rEctilinear slots, said main segment element being provided with a pair of lugs adapted to be moved laterally away from each other, on either side of said segment support, and a detachable contour element mounted to said segment support.
Claim 3
Dependent Claim
74 words
Tire-making drum as set forth in claim 1, wherein a lever is pivotally mounted to the bead clamp and adapted to be pivoted towards the median transverse plane of the drum and to remain parallel to the drum axis as long as said lever is not pushed in the direction away from said drum axis during the drum expansion by the registering one of the pair of lugs adjustably carried by the segment support.
Claim 4
Dependent Claim
40 words
Tire making drum as set forth in claim 1, wherein metal blades are fitted to constitute circular series in the substantially toroidal periphery of the set of detachable contour elements, said blades acting as supports to the elastic covering membrane.
Claim 5
Dependent Claim
42 words
Tire making drum as set forth in claim 1, wherein square tenons are mounted beneath each end of the blades and adapted to fit into the ends of transverse grooves cut in one portion of the width of each detachable contour element.
Claim 6
Dependent Claim
126 words
Tire making drum as set forth in claim 1, wherein each annular flange unit comprises a compound cylinder structure in which three coaxial annular chambers are formed, a piston rigidly supported by said hollow shaft and slidably fitted in a first annular chamber, and three other pistons slidably fitted in the second annular chamber, with one of these pistons adapted to drive through its rod extending towards the median transverse plane of the drum the radial movements of the bead clamp, and a fifth piston slidably fitted in the third annular chamber and of which the rod directed towards said median, transverse plane of the drum is adapted to control the pivotal movements of the device for folding the tire making materials within the bead clamp.
Claim 7
Dependent Claim
35 words
Tire making drum as set forth in claim 2, wherein a rack is carried by each one of said annular flange units, and a pinion rigid with said hollow shaft and meshing with said rack.
Claim 8
Dependent Claim
108 words
Tire-making drum as set forth in claim 5, wherein a rod is formed with an intermediate notch and mounted for vertical sliding movement in the end of each annular flange unit which is adjacent to the median transverse plane of the drum, said rod supporting the bead clamp, a pivot pin mounted to the same end and a bell-crank lever fulcrumed to said pivot pin and having one arm engaged in a notch cut in the end of the rod of the piston slidably fitted in the second annular chamber of said compound cylinder structure and its other arm engaged in the notch of said vertical sliding rod.
Claim 9
Dependent Claim
103 words
Tire making drum as set forth in claim 1, wherein the device provided in the bead clamp for folding the tire making materials comprises an arm pivoted to the body of said compound cylinder structure through its heel having the configuration of a toothed sector, a rack cut along the rod of the piston slidably fitted in the third annular chamber of said compound cylinder structure and meshing with said toothed sector, and a series of short levers each pivoted to said arm and attached to one end of an elastic blade having its other end rigidly engaged in the corresponding bead clamp.
References Cited (Backward Citations)
GB1038067A
Cited
US3560301A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-22 | 1977-04-23 | 1977-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-22 | 1981-04-23 | 1981-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-22 | 1985-04-23 | 1985-10-23 | $7700.00 | Window Closed / Lapsed |