Patent US4156613A successfully refreshed from Google Patents.
Patent US3797686A successfully refreshed from Google Patents.
US3797686A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for conveying pipe longitudinally
Assignee: Shaw Pipe Industries Ltd
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Filing: 1973-07-05
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Granted: 1974-03-19
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Expires: 1993-07-05
Abstract
Abstract Apparatus for conveying pipe longitudinally comprises a main conveyor section and first and second terminal conveyor sections positioned respectively to advance incoming pipe sections to the main conveyor section and to receive treated pipe sections from the main conveyor section, each conveyor section being adapted to locate the pipe sections continuously about a longitudinal axis while longitudinally advancing the sections at a selected feed. Each of the terminal conveyor sections is movable longitudinally by power means to effect coupling of the incoming pipe sections and detachment of the leading pipe sections, respectively, and is selectively operable to advance a pipe section carried thereby at the selected speed to permit such coupling or detachment, and to advance a pipe section at a speed greater than the selected speed prior to such coupling, or after such detachment.
Inventors
- 👤 H Jarvis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:45
CPC Classifications
B; B65; B65G; B65G13/00; B65G13/11; B65G13/12; B23; B23Q; B23Q7/00; B23Q7/05; B23Q7/055; B65G47/00; B65G47/22; B65G47/24; B65G47/248; B65G47/26; B65G47/30; B65G47/31; B65G2201/00; B65G2201/02; B65G2201/0276
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
306 words
Apparatus for conveying pipe longitudinally through a treatment zone, the pipe consisting of a plurality of pipe sections coupled together in end to end relation by means providing detachable spigot connections between adjacent pipe sections, the apparatus comprising: a main conveyor section extending longitudinally through the treatment zone for advancing the coupled pipe sections therethrough, a first terminal conveyor section adapted to receive individual pipe sections to be conveyed, the first terminal conveyor section being longitudinally aligned with the main conveyor section and positioned to advance said individual pipe sections thereto, a second terminal conveyor section longitudinally aligned with the main conveyor section and positioned to receive pipe sections successively advanced therefrom, each of said conveyor sections including conveying means adapted to rotate the pipe sections carried thereby about a longitudinal axis while longitudinally advancing same, control means for operating said conveying means at a common selected speed, first variable speed means coupled to the conveying means of the first terminal conveyor section for selectively operating same at a speed higher than said selected speed, whereby to advance said individual pipe sections successively towards the coupled pipe sections carried by the main conveyor section, first power means connected to the first terminal conveyor section for advancing same towards the main conveyor section, whereby to effect the spigot connections between said individual pipe sections and the coupled pipe sections, second power means connected to the second terminal conveyor section for advancing same away from the main conveyor section, whereby to detach successive pipe sections from the coupled pipe sections advanced from the main conveyor section, and second variable speed means coupled to the conveying means of the second terminal conveyor section for selectively operating same at a speed higher than said selected speed, whereby to advance said detached pipe sections successively away from the coupled pipe sections.
Claim 2
Dependent Claim
306 words
Apparatus for conveying pipe longitudinally through a treatment zone, the pipe consisting of a plurality of pipe sections coupled together in end to end relation by means providing detachable spigot connections between adjacent pipe sections, the apparatus comprising: a main conveyor section extending longitudinally through the treatment zone for advancing the coupled pipe sections therethrough, a first terminal conveyor section adapted to receive individual pipe sections to be conveyed, the first terminal conveyor section being longitudinally aligned with the main conveyor section and positioned to advance said individual pipe sections thereto, a second terminal conveyor section longitudinally aligned with the main conveyor section and positioned to receive pipe sections successively advanced therefrom, each of said conveyor sections including conveying means adapted to rotate the pipe sections carried thereby about a longitudinal axis while longitudinally advancing same, control means for operating said conveying means at a common selected speed, first variable speed means coupled to the conveying means of the first terminal conveyor section for selectively operating same at a speed higher than said selected speed, whereby to advance said individual pipe sections successively towards the coupled pipe sections carried by the main conveyor section, first power means connected to the first terminal conveyor section for advancing same towards the main conveyor section, whereby to effect the spigot connections between said individual pipe sections and the coupled pipe sections, second power means connected to the second terminal conveyor section for advancing same away from the main conveyor section, whereby to detach successive pipe sections from the coupled pipe sections advanced from the main conveyor section, and second variable speed means coupled to the conveying means of the second terminal conveyor section for selectively operating same at a speed higher than said selected speed, whereby to advance said detached pipe sections successively away from the coupled pipe sections.
Claim 3
Dependent Claim
45 words
Apparatus according to claim 1, wherein said means providing detachable spigot connections are constituted by coupling members each comprising a body portion and a pair of opposed, axially extending spigot portions adapted to engage frictionally the internal surfaces of a pair of adjacent pipe sections.
Claim 4
Dependent Claim
84 words
Apparatus according to claim 1, wherein each of the conveyor sections comprises an elongated, longitudinally extending support frame, each conveying means comprising a plurality of longitudinally spaced pairs of wheels whose axes are parallel and inclined to the longitudinal direction of pipe feed, the wheels of each pair being longitudinally offset whereby to form a cradle for supporting the pipe, respective mounting means for the pairs of wheels, and drive means coupled to one wheel of each pair for rotating the wheels in synchronism.
Claim 5
Dependent Claim
27 words
Apparatus according to claim 3, wherein the support frames of the first and second terminal conveyor sections are constrained by rails to move along a longitudinal path.
Claim 6
Dependent Claim
39 words
Apparatus according to claim 4, wherein each of said first and second power means comprises a linear displacement apparatus connected between the support frame of the respective terminal conveyor section and the support frame of the main conveyor section.
Claim 7
Dependent Claim
16 words
Apparatus according to claim 5, wherein each of said linear displacement apparatus is a hydraulic ram.
Claim 8
Dependent Claim
73 words
Apparatus according to claim 3, wherein each of the first terminal and main conveyor sections includes means providing a hinge connection between the respective support frame and the mounting means for the leading pair of wheels, and power means connected between the mounting means and the support frame for raising and lowering said leading pair of wheels to and from a position in which the wheels engage a pipe section to be advanced.
References Cited (Backward Citations)
US3581922A
Cited
US3664531A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-03-18 | 1977-09-17 | 1978-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-18 | 1981-09-17 | 1982-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-18 | 1985-09-17 | 1986-03-19 | $7700.00 | Window Closed / Lapsed |