Inventors:
John L. Winther - Orinda CA, US
Blake Andrew Toland - Walnut Creek CA, US
International Classification:
E02B 9/04
B01D 29/33
B01D 29/68
B01D 35/02
B01D 35/157
E02B 5/08
US Classification:
210155, 210159, 210162, 2101701, 21017011, 21033301, 210338, 210411, 210429, 210430, 210461, 405 81, 405127
Abstract:
Debris adhering to the outer surface of a barrel-type fish screen is cleared by air bursts from a series of perforated air pipes positioned inside the outer foraminous shell of the screen, the perforations being holes with axes at an acute angle to the screen radius for efficient use of the air. Separately, the conical water collection manifold mounted inside the shell is open at its narrow end, with a valve mounted to that open end to control the opening. The opening prevents reduced water inflow at that end of the manifold, and the valve adjusts the access of the surrounding water to the opening, thereby allowing the manifold to be tuned to more closely approach a uniform distribution of axial water flow along the length of the collection manifold for different ambient conditions. Webs joining the air pipes to the collection manifold are also included in certain embodiments of the invention to support increased lengths of the entire apparatus without loss of structural integrity, including support for the foraminous shell.
