Patent ID: 6361284
Filing Date: 2002-03-26
Classification: A61M,F04B

Abstract:
A membrane fluid circulator comprising an internal hydraulic circuit made up in succession of an admission orifice, a pump body and a delivery orifice wherein the pump body has rigid walls defining therebetween a circulation space for the fluid with a deformable membrane maintained in tension parallel to the fluid circulation direction and located in said circulation space, said rigid walls being disk-shaped with said delivery orifice arranged at the center of at least one of said walls and said deformable membrane being disk-shaped, said membrane having an edge near to said admission orifice and provided with means for coupling to a motor member generating a periodic excitation force substantially normally to the surface of said membrane, said membrane constituting a medium for waves traveling from said admission orifice to said delivery orifice, and wherein the thickness of said circulation space is decreasing from said admission orifice to said delivery orifice for acting as forced damping means of the waves along said membrane.