Patent ID: 6536278
Filing Date: 2003-03-25
Classification: A61B,A61M,B29C

Abstract:
A transducer protection device, particularly for hemodialysis processes, comprising: a first element; a second element said first and second elements being made of plastics and being coupled coaxially with respect to a common axis thereof; a first tubular connector; a second tubular connector; said first and second tubular connectors being each blended with a respective flange coaxial to said common axis so as to form said first and second elements, and said flanges being coupled to each other along a peripheral region thereof by ultrasonic thermal bonding; a recess formed frontally, coaxial to said common axis, on a first one of said flanges; a semipermeable membrane accommodated in said recess, in a fixed arrangement, by imbibition of melted plastics along a circular border region of said membrane upon thermal bonding; and a circular ridge which is shaped complementarily to said border region and protrudes frontally from a second one of said flanges, the thermal bonding being performed on said ridge so as to achieve intimate bonding between said first and second flanges and said membrane, further comprising an annular cavity located frontally and peripherally to said second flange, and which is coaxial to said common axis and edges having a pointed longitudinal cross-section for enclosing said annular cavity.