04683916 is referenced by 245 patents and cites 4 patents.

A normally closed, one-way check valve having a body composed of two cylindrical containers which complement each other, each of said containers having a tubular projection with a liquid opening therethrough, one of said cylindrical chambers provided with a plurality of longitudinally extending ribs therealong for preventing sticking of a valve disc as contained within an assembled valve device, also further including a traverse bar for pressing against a valve disc. The other body component is provided with a pointed triangular support and also a plurality of radially extending ribs for preventing a valve disc from opening so far as to close off the egress port provided with said second element, together with a rubber resilient valve disc which is retained between the pointed triangular support and the traverse bar when the unit is assembled by sonic welding into a permanently assembled device. The assembled device further includes a circumferential ring having a pair of projecting legs, each leg having a rib on the free end thereof for reinforcement and direct engagement with the resilient valve disc for the purpose of opening same when the ring is moved under the force of the tip of a syringe.

Normally closed automatic reflux valve
Application Number
Publication Number
Application Date
September 25, 1986
Publication Date
August 4, 1987
Kenneth C Raines
Shoemaker and Mattare
Burron Medical
F16K 15/14
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