Patent ID: 8875739

Claim:
An actuatable valve comprising: a) a sealing plug at least partially resilient and dimensioned to fit sealingly on an annular opening of an upstanding pipe in a valve assembly; b) a mounting flange oriented below and radially distanced from said sealing plug; and c) at least two non-resilient legs connecting said sealing plug to said mounting flange, each leg comprising first and second rigid leg segments hingably connected to one another at an elbow-like apex, each of said first leg segments connected hingably to said sealing plug and each of said second leg segments hingably connected to said mounting flange; and wherein each of said apexes are positioned higher than said sealing plug, and wherein during actuation of said valve, vertical displacement of said sealing plug from said annular opening causes concomitant increase in the angles: (i) between said mounting flange and said second leg segments; (ii) between said first and second leg segments; and (iii) between said sealing plug and said first leg segments.