Pressure controlled magnetic valve for a catheter
View Patent ↗A urine control device to be placed intermediate a catheter and a collection bag is provided. The urine control device includes first and second bell shaped housings with a magnetic valve disposed between the first and the second housings. When the pressure from the urine which flows through the present catheter enters the first chamber and exceeds the magnetic attraction in the valve, the valve pivotally opens, permitting the urine to flow through the open valve and into the second chamber. Due to the shape of the chambers, secondary forces create a low pressure zone in the second chamber which helps empty the bladder fully. Once the flow ceases, the magnetic valve pivotally shuts, allowing the urine pressure to build once again. Various sample ports and air entry ports may be provided on the device.
1. A flow control device comprising:
a magnet housing having a stationary magnet disposed therein, said magnet housing having an aperture formed therein, said magnet housing having an annular ring surrounding said aperture;
a flap magnet disposed against said magnet housing and for being attracted to said stationary magnet and held against said annular ring counter to pressure of a fluid in the flow control device, said stationary magnet and said flap magnet sized for having an attraction force set to a predetermined value, which when exceeded by the pressure of the fluid acting on said flap magnet at said annular aperture results in the flap magnet pivoting away from said aperture at an angle while remaining at least partially in contact with said magnet housing.
2. The flow control device according to claim 1 , comprising:
a flap magnet retention device disposed in an outlet housing opening for preventing said flap magnet from dropping and losing contact with said magnet housing.
3. The flow control device according to claim 2 , wherein said flap magnet retention device defines a distance to said magnet housing which limits the angle said flap magnet pivots to less than 45 degrees.
4. The flow control device according to claim 2 , wherein said magnet retention device has an inside wall, a diameter of said flap magnet is greater than a largest distance between said inside wall and an edge of said aperture, such that said flap magnet cannot be positioned against said magnet housing without completely covering said annular aperture.
5. The flow control device according to claim 2 , wherein said outlet housing defines an annular bowl-shaped chamber leading to a drain aperture at a base of said bowl-shaped chamber, said bowl-shaped chamber has an annular wall region extending longitudinally from said drain aperture.
6. The flow control device according to claim 5 , wherein said bowl-shaped chamber is free of any structures, within said annular wall region, which would disrupt a vortex flow.
7. The flow control device according to claim 6 , wherein said annular wall region extends substantially up to said magnet retention device.
8. The flow control device according to claim 6 , wherein said magnet retention device has an inside wall and strips that extend between opposite points on said inside wall, said strips prevent said flap magnet from being separated from said magnet housing.
9. The flow control device according to claim 1 , wherein said predetermined value is set to release when a pressure of 7.5-10.5 inches of H 2 O is realized against said flap magnet.