Resources Contact Us Home
Combination of flow meter and bubble trap

Image Number 2 for United States Patent #4061031.

Combination of a flow meter and a bubble trap for blood which has been extracted for extra-corporeal treatment, in particular for dialysis. Said combination comprises a container divided by a vertical partition wall into a vertically elongated inlet chamber having an inlet opening receiving the blood flow to be measured and treated, and an outlet chamber of substantially greater cross-section than the inlet chamber and in liquid communication with an outlet opening. According to the invention, a narrow passage with a substantially smaller cross-section than the inlet opening is provided through the partition wall, preferably near the lower end of the same, causing the liquid level in the elongated inlet chamber to rise substantially above the level of said narrow passage. The difference between the liquid levels in the respective chambers will be an indication of the blood flow rate through the container, a pressure equalization opening being provided through the wall above said liquid levels. Both chambers are serving as efficient bubble traps, the influx of blood to the inlet chamber taking place below the liquid level and preferably in a vertical direction, and the output chamber providing the advantageous combination of an extended free surface and a reduced blood flow rate.

  Recently Added Patents
Vehicle-mounted camera stabilized passively by vibration isolators
Output queued switch with a parallel shared memory, and method of operating same
Semiconductor device and method of manufacturing the same
Method of operating an electromechanical converter, a controller and a computer program product
System for providing access to playable media
Systems and methods of using dynamic data for wear leveling in solid-state devices
  Randomly Featured Patents
Amino-resin compositions
Excavator tooth
Fiber reinforced resin preform
Amide compound
Construction of tuning circuit in tuner
Circuit interrupter with digital trip unit and power supply
Blanket design for imploding liner systems
Humanized anti-CD22 antibodies and their use in treatment of oncology, transplantation and autoimmune disease
Biopsy device having a vacuum pump
Double exposure prevention mechanism