Title: Fluid flow control valves

Abstract: A tidal flap valve adapted to be located in sea walls, storage tank walls or banks of tidal rivers or other water courses in which the liquid level varies, the valve comprising a flap or closure member supported on a frame by a flexible hinge, the frame defining an opening and adapted for attachment to a substantially vertical wall about an opening therein, the hinge being protected against damage by being disposed in a substantially enclosed space defined by a portion of the frame and a portion of the closure member.

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Inventors: Hope, Bernard Francis (Birmingham, EN)

Application Number: 461310
Filing Date: 1974-04-16
Publication_date: 1976-02-17
Assignee: Coplastix Limited (EN)
Primary Class(es): 137/527.8 137/377
Other Classes:
US Patent Ref:

1063637	Jun, 1913	Barker	137/527.
2112630	Mar, 1938	Marshall	137/525.
2882923	Apr, 1959	Smolensky	137/527.
3128785	Apr, 1964	Krummel	137/525.
3292658	Dec, 1966	Scaramucci	137/525.
3613720	Oct, 1971	Welch	137/527.
3809119	May, 1974	Cave	137/527.

Other Refs:
Primary Examiner: Cline, William R.
Assistant Examiner:
Attorney: Norris & Bateman