Hydraulic and earth engineering – Fluid control – treatment – or containment – Flow control
Patent
1990-10-25
1992-03-03
Taylor, Dennis L.
Hydraulic and earth engineering
Fluid control, treatment, or containment
Flow control
137386, 405 91, 405115, E02B 720
Patent
active
050927078
ABSTRACT:
Several panels are pivotably mounted on top of a dam spillway for movement by air pressure provided through bladders downstream of these panels. The bladders are made from an elastomeric sheet that is folded so that edge portions overlap one another. A clamping bar secures these overlapping portions to the dam spillway. The sheet is also secured to the panel and defines the pivot or hinge joint for the panel. Abutments or stops on the clamping bar engage a strap, that also secures the bladder to the panel, so that the panel will not move upwardly beyond a limit position. An air operating system is disclosed for moving the panels in response to changes in the height or head of water upstream of the panels.
REFERENCES:
patent: 3338261 (1967-08-01), Bergeson et al.
patent: 3922564 (1975-11-01), Kachuk et al.
patent: 4332507 (1982-06-01), Wakamori et al.
patent: 4498809 (1985-02-01), Farmer
patent: 4772157 (1988-09-01), Obermeyer
patent: 4780024 (1988-10-01), Obermeyer et al.
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