Continuous catheter flushing flow control device
First Claim
1. A continuous catheter flushing flow control device comprising a body member having a cylindrical bore chamber and provided with a pair of diametrically opposite port openings in the cylindrical wall of said bore chamber, a stem member comprising a cylindrical drum element extending into and rotatively engaged in liquid tight relation with the cylindrical bore wall of said chamber, interengaging means on said body and stem members locking said drum element axially within the said chamber without hindering rotative movement of the stem member therewithin, said drum element having a diametrical passageway extending transversely therethrough for registering with and interconnecting said port openings in a first relative rotative flow controlling position of said members, flow restrictor means in said passageway comprising a capillary passage therein for restricting the flow of liquid through said passageway to a relatively slow capillary controlled rate, said drum element further having an arcuate groove extending circumferentially therearound through an angular extent sufficient to interconnect the said port openings, when the said members are relatively rotated to a second rotative flow controlling position angularly displaced around 90°
- from the said first relative rotative position thereof, to thereby form with the cylindrical wall of said bore chamber a single bypass passageway around the said diametrical passageway and the flow restrictor means therein, said arcuate groove and bypass passageway having a cross-sectional size throughout sufficient to permit a relatively large unrestricted flow of liquid through said bypass passageway from one to the other of said port openings, said members being biased so as to be normally held in their said flow restricting first relative rotative position.
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Accused Products
Abstract
A flow regulating valve device providing continuous flushing of intravascular catheters with a flushing solution at either a restricted normal slow flow rate or intermittently at a catheter flush-out fast flow rate. The valve device has a cylindrical drum element rotatably mounted within a cylindrical chamber of a body member and provided with a diametrical flow-restricting capillary passage and a circumferentially extending, arcuate groove fast flow bypass passageway which are selectively moved into respective flow controlling positions by rotative adjustment of the drum element within the chamber. Biasing spring means on the device normally bias and maintain the body and stem members in their restricted flow rate relative rotative position while actuating arm means on these members enable manual rotative displacement thereof to their fast flow relative rotative position.
55 Citations
31 Claims
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1. A continuous catheter flushing flow control device comprising a body member having a cylindrical bore chamber and provided with a pair of diametrically opposite port openings in the cylindrical wall of said bore chamber, a stem member comprising a cylindrical drum element extending into and rotatively engaged in liquid tight relation with the cylindrical bore wall of said chamber, interengaging means on said body and stem members locking said drum element axially within the said chamber without hindering rotative movement of the stem member therewithin, said drum element having a diametrical passageway extending transversely therethrough for registering with and interconnecting said port openings in a first relative rotative flow controlling position of said members, flow restrictor means in said passageway comprising a capillary passage therein for restricting the flow of liquid through said passageway to a relatively slow capillary controlled rate, said drum element further having an arcuate groove extending circumferentially therearound through an angular extent sufficient to interconnect the said port openings, when the said members are relatively rotated to a second rotative flow controlling position angularly displaced around 90°
- from the said first relative rotative position thereof, to thereby form with the cylindrical wall of said bore chamber a single bypass passageway around the said diametrical passageway and the flow restrictor means therein, said arcuate groove and bypass passageway having a cross-sectional size throughout sufficient to permit a relatively large unrestricted flow of liquid through said bypass passageway from one to the other of said port openings, said members being biased so as to be normally held in their said flow restricting first relative rotative position.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A continuous catheter flushing flow control device comprising a cup-shaped body member having an end wall and a surrounding cylindrical side wall defining therewith a cylindrical bore chamber open at the end opposite said end wall, said side wall being provided with a pair of diametrically opposite port openings therein opening into said chamber, a stem member comprising a cylindrical drum element extending into the said open end of and rotatively engaged in liquid tight relation with the cylindrical bore wall of said chamber, a stud end portion projecting endwise from said drum element through a bore opening in said end wall and snap-locked in place therein to secure the said members together in rotative assembled relation, said drum element having a diametrical passageway extending transversely therethrough for registering with and interconnecting said port openings in a first relative rotative flow controlling position of said members, flow restrictor means in said passageway comprising a capillary passage therein for restricting the flow of liquid through said passageway to a relatively slow capillary controlled rate, said drum element further having an arcuate groove extending circumferentially therearound through an angular extent sufficient to interconnect the said port openings, when the said members are relatively rotated to a second rotative flow controlling position angularly displaced around 90°
- from the said first relative rotative position thereof, to thereby form with the cylindrical wall of said bore chamber a single bypass passageway around the said diametrical passageway and the flow restrictor means therein, said arcuate groove and bypass passageway having a crosssectional size throughout sufficient to permit a relatively large unrestricted flow of liquid through said bypass passageway from one to the other of said port openings, said members being biased so as to be normally held in their said flow restricting first relative rotative position.
- View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
Specification