Method of making a flume
Abstract
Abstract Method of making a water flume of lightweight, thin, flexible ferro cement comprising a plurality of flumes molded to shape from superimposed layers of fresh cement reinforced with flexible mesh and employing one layer as the mold form for the adjacent layer. By this technique, the flumes are molded in internested sets of complementally shaped, semi-tubular structures. One or more rows of closely spaced, normally closed outlets are provided along the flume bottom and these outlets can be unplugged separately or in groups to regulate the location and amount of the flow released from the flume. The flume sections are formed flat, one on top of the other, using flexible film separators following which the layered mass is folded against the opposite side of a rigid, semi-tubular form and held until the cement sets. The outlet holes are formed through the internested mass and the finished product is carried to the field, inverted, and assembled end to end in overlapping relation.
Inventors
- 👤 James E Cotton
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) | 1975-01-03 | 1975-07-05 | 1976-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-03 | 1979-07-05 | 1980-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-03 | 1983-07-05 | 1984-01-04 | $7700.00 | Window Closed / Lapsed |