Method of laying pipe in or on a bed of particle material or in a trench
Abstract
Abstract A METHOD AND APPARATUS ARE DISCLOSED FOR LAYING PIPE, AND PARTICULARLY SECTIONAL PIPE SUCH AS SEWER AND DRAIN TILE, IN OR ON A BEAD OF PARTICLE MATERIAL SUCH AS GRAVEL OR CRUSHED ROCK. ACCORDING TO THE METHOD, A SERIES OF POSTS ARE REMOVABLY MOUNTED AT SPACED POSITIONS ON THE GROUND ALONG THE COURSE OF THE PIPE, AND THE PIPE IS RELEASABLY SUPPORTED ON THE POSTS IN A RAISED CONDITION ABOVE THE GROUND, WHILE THE PARTICLE MATERIAL IS DEPOSITED UNDER THE PIPE TO AT LEAST A DEPTH AT WHICH THE DEPOSIT CAN SUSTAIN THE PIPE IN ITS RAISED CONDITION. THEN THE PIPE IS RELEASED FROM THE SUPPORT OF THE POSTS, AND THE POSTS ARE REMOVED FROM THE DEPOSIT WHILE THE DEPOSIT SUSTAINS THE CONDITION OF THE PIPE. WHERE THE PIPE IS DIVIDED INTO SECTIONS, AS IN THE CASE OF SEWER AND DRAIN TILE, EACH SECTION IS SUPPORTED ON A SINGLE POST SO THAT THE SECTIONS CAN BE QUICKLY ALIGNED WITH ONE ANOTHER ALONG THE DESIRED SLOPE.
Inventors
- 👤 Robert E Mclaughlin
- 👤 Lloyd J Charbonneau
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) | 1974-03-08 | 1974-09-07 | 1975-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-08 | 1978-09-07 | 1979-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-08 | 1982-09-07 | 1983-03-09 | $7700.00 | Window Closed / Lapsed |