Valves and valve actuation – Tube compressors – Pivoting tube contacting element
Patent
1985-11-08
1987-04-28
Schwadron, Martin P.
Valves and valve actuation
Tube compressors
Pivoting tube contacting element
251230, 251231, 251251, 251286, 251904, 74533, F16L 5514
Patent
active
046608028
ABSTRACT:
A device for controlling the flow of a liquid medium passed therethrough comprises a cup-shaped plastic body member having a bottom end wall with a bore opening and a side wall forming with the bottom end wall a chamber through which the liquid medium is passed. A plastic stem member is journaled in the bore opening of the body member to rotatably mount the stem member thereon. The stem member overlies and closes off the open top end of the chamber and has a flow control element located within the chamber for controlling the flow rate of the liquid medium therethrough, as determined by the selected relative rotative position of the member. The stem member is snap-locked in assembled relation with the body member, and the two members are provided with actuating arm means including a radially outward projecting lever arm on the stem member for rotating the members relative to one another. Retaining means comprising a detent on the lever arm in ratcheting engagement with an arcuate ratchet bar on the body member are provided for maintaining the members in a selected relative rotative flow controlling position. In a tubing clamp form of the flow controlling device affording drop-by-drop liquid flow, the body member is provided with an open ended channelway thereacross open at its top for sidewise insertion of a compressible tubing thereinto and retention therein by the stem member on its snap-locked assembly with the body member. A flow control element in the form of a disc cam on the stem member engages with the tubing in the channelway on relative rotative movement of the body and stem members from an inoperative position in which the cam is disengaged from the tubing to an operative position in which the cam is engaged with the tubing to effect either partial or complete occlusion of the tubing, depending on the relative rotative position of the body and stem members.
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Novack Sheri M.
RAO Medical Devices, Inc.
Schwadron Martin P.
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