Method and apparatus for laying pipe
Abstract
Abstract AN APPARATUS FOR INSTALLING A SUBTERRANEAN PIPELINE IN AN ELONGATED EARTHEN TRENCH. THE APPARATUS INCLUDES A MOBILE HOUSING OPERABLE TO BE MOVED ALONG AND WITHIN THE TRENCH. STRUCTURE IS PROVIDED FOR GUIDING INDIVIDUAL SECTIONS OF PIPE INTO LONGITUDINAL ALIGNMENT WITH THE PIPELINE AND MECHANISM IS PROVIDED FOR SHIFTING THE SECTIONS INTO ABUTMENT WITH THE PIPELINE AND FOR MAINTAINING THE PIPELINE IN COMPRESSION TO PREVENT THE INDIVIDUAL SECTIONS FROM MOVING SUBSTANTIALLY AFTER THEY ARE EMPLACED. THE STRUCTURE AND THE MECHANISM ARE MOUNTED FOR RECTILINEAR VERTICAL MOVEMENT WITHIN THE HOUSING SO THAT THE GRADE OF THE PIPELINE MAY BE CLOSELY CONTROLLED IRRESPECTIVE OF THE GRADE OF THE BOTTOM OF THE TRENCH. ALSO INCLUDED IS MEANS FOR PREVENTING DEVELOPMENT OF SUCTION BETWEEN THE HOUSING AND THE TRENCH WHEN THE LATTER IS MOIST.
Inventors
- 👤 Marvin E Wells
Bibliographic Details
Claims Analysis
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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) | 1974-09-19 | 1975-03-21 | 1975-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-19 | 1979-03-21 | 1979-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-19 | 1983-03-21 | 1983-09-20 | $7700.00 | Window Closed / Lapsed |