Liquid flow control device

A device for controlling the flow of a liquid passed therethrough and comprising a side insertion tubing clamp, said device comprising a body member of cup-shaped form having a bottom end wall with a bore opening therethrough and a surrounding said wall defining with said bottom end wall a chamber open at the top and within which the flow of said liquid is controlled, a stem member rotatably mounted on said body member for rotative movement relative thereto about an axis of rotation, said stem member including a flow control element rotatable within said chamber about the said axis, actuating means on said members including a lever arm on said stem member projecting generally radially outward therefrom for effecting rotative movement of the stem member relative to said body member, said body member also having an open ended channelway extending transversely thereacross through the said side wall and chamber and laterally offset to one side of said bore opening, said channelway opening sidewise into the said chamber toward the said bore opening and outwardly of the open top of said chamber for sidewise insertion into the open top of the channelway of an elastically compressible tubing to be clamped therein, said stem member being journaled in said bore opening and overlying and closing the said open top of said channelway to retain the said tubing in place therein, the said flow control element on said stem member comprising a disc cam located eccentrically thereon within the said chamber, with respect to the said axis of rotation of said members, and engageable with the tubing in said channelway through the said sidewise opening thereof, on rotation of the stem member relative to the body member from an inoperative position to an operative position, to thereby laterally compress and contract the tubing against the opposing side of the channelway, and interengageable retaining means on said members for maintaining them in a selected rotative position relative to one another, said retaining means comprising detent means on said lever arm in ratcheting engagement with an arcuate ratchet bar on said body member.

A side insertion tubing clamp comprising a cup-shaped body member having a bottom end wall with a bore opening therethrough and a surrounding side wall defining with said bottom end wall a chamber open at its top, said body member also having an open ended channelway extending transversely thereacross through the said side wall and chamber and laterally offset to one side of said bore opening, said channelway being open at the top of the body member for sidewise insertion of an elastically compressible tubing into the channelway through its said open top, a stem member rotatively mounted on said body member and having a cap portion overlying and closing the open top of said channelway along at least a portion of its length to retain the said tubing in place therein, said stem member having a stem portion projecting into said chamber from said cap portion and provided with a projecting journal end portion extending into and journaled in said bore opening, said stem portion including a disc cam within said chamber and engageable with the tubing in said channelway, through an opening in the side thereof, to laterally compress and contract the tubing on rotation of the stem member in one direction relative to the body member from an inoperative position to an operative position, and interengageable retaining means on said members to hold them in a selected rotative position relative to one another, said journal end portion being diametrically slotted inwardly from its outward end for spring contraction thereof to a smaller diametrical dimension across one diameter and being provided around its outermost end with laterally outward projecting locking lip means of cam-shaped section for snap-locking behind the said bottom end wall of said body member, on insertion and passage of said journal end portion into and through the said bore opening, to thereby lock the said body and stem members together in assembled rotative relation.