04535820 is referenced by 141 patents and cites 8 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. A further embodiment provides for a permanent dimple in the valve disc prior to assembly of the component elements, while a further embodiment provides a valve disc with an elongated groove or recess of somewhat oval shape for reception of the pointed triangular support member of the second body component.

Title
Normally closed check valve
Application Number
6/613644
Publication Number
4535820
Application Date
May 24, 1984
Publication Date
August 20, 1985
Inventor
Kenneth C Raines
Bethlehem
PA, US
Agent
Shoemaker and Mattare
Assignee
Burron Medical
PA, US
IPC
F16K 15/14
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