US3704983A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and apparatus for the formation of tubular articles
Assignee: BUTIN GILLET Ets
•
Filing: 1970-12-04
•
Granted: 1972-12-05
•
Expires: 1990-12-04
Abstract
Abstract In the formation of corrugated tubes, forming members are arranged around the periphery of the tube at spaced axial intervals. The forming members are first locked in their axial positions and hydraulic pressure is applied internally of the tube to form initial corrugations in the tube between the forming members. The forming members are then released for axial movement and the internal pressure is continued simultaneously with the application of axial pressure through the forming members.
Inventors
- 👤 Raymond Jean Bernard Tellot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:21
CPC Classifications
B; B21; B21D; B21D15/00; B21D15/04; B21D15/10
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
155 words
Apparatus for forming tubular articles, comprising a plurality of aligned forming elements, support means releasably maintaining the forming elements in spaced apart relation, a hollow perforate mandrel for receiving a length of tube, a carriage supporting the mandrel, means mounting the carriage for movement longitudinally relative to the forming elements, means mounting said mandrel on the carriage for pivotal movement between a position in which the mandrel extends between the forming elements, and a loading and unloading position in which the mandrel extends out of the apparatus, a source of fluid pressure in communication with the mandrel and the interior wall of the length of tube when the mandrel is in position extending between the forming elements, and a hydraulic jack for exerting a longitudinal force on the tube and for moving the forming elements closer to one another once said support means for maintaining the forming elements in spaced apart relation has been released.
Claim 2
Dependent Claim
155 words
Apparatus for forming tubular articles, comprising a plurality of aligned forming elements, support means releasably maintaining the forming elements in spaced apart relation, a hollow perforate mandrel for receiving a length of tube, a carriage supporting the mandrel, means mounting the carriage for movement longitudinally relative to the forming elements, means mounting said mandrel on the carriage for pivotal movement between a position in which the mandrel extends between the forming elements, and a loading and unloading position in which the mandrel extends out of the apparatus, a source of fluid pressure in communication with the mandrel and the interior wall of the length of tube when the mandrel is in position extending between the forming elements, and a hydraulic jack for exerting a longitudinal force on the tube and for moving the forming elements closer to one another once said support means for maintaining the forming elements in spaced apart relation has been released.
Claim 3
Dependent Claim
75 words
Apparatus according to claim 1, wherein the source of fluid includes a hydraulic cylinder coaxial with the forming elements and at the side thereof opposite the hydraulic jack, a first seal at the end of the hydraulic cylinder adjacent the forming elements for sealing with one end of the tubular article to be formed, and a second seal mounted on the carriage for sealing with the other end of the tubular article to be formed.
Claim 4
Dependent Claim
42 words
Apparatus according to claim 1, and a hydraulic pump feeding said hydraulic jack, a distributor valve downstream of said pump, a pressure limiting device downstream of said valve, and switch means in the path of the jack for controlling the travel thereof.
Claim 5
Dependent Claim
47 words
Apparatus according to claim 1, and manometric control devices adapted to be isolated from one another for providing low fluid pressure for a pre-forming operation when said forming elements are maintained spaced apart and higher fluid pressure for a forming operation when said forming elements are released.
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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) | 1975-12-05 | 1976-06-05 | 1976-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-05 | 1980-06-05 | 1980-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-05 | 1984-06-05 | 1984-12-05 | $7700.00 | Window Closed / Lapsed |