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Arterial blood filter with improved gas venting

  • US 4,411,783 A
  • Filed: 12/23/1981
  • Issued: 10/25/1983
  • Est. Priority Date: 12/23/1981
  • Status: Expired
First Claim
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1. A liquid filter suitable for use in an extracorporeal blood flow circuit comprisinga hollow tubular housing having a side wall, a top wall having a highest point at the center thereof and a bottom wall,a gas vent in said top wall at said highest point,a perforated tubular core concentrically disposed within said housing,a cylindrical filter element surrounding said core and displaced from said side wall,a filter element cap covering the upper ends of said core and said filter element and displaced from said top wall,a substantially horizontal liquid inlet in said side wall adjacent said top wall, anda filtrate outlet in said bottom wall of said housing in communication with the space within said core,with the upper surface of said filter element cap being symmetrical about the longitudinal axis of said housing, having a highest point at its center, and being without any points of localized minimum height, and with said inlet being adapted to direct the incoming flow of liquid in a non-perpendicular manner against the side wall of said housing,whereby a swirling flow of liquid is established outside said filter element and above said filter element cap.

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