초록 ▼

A valve for use in medical applications is disclosed which is a highly precise, passive, one-way valve which makes an excellent inlet valve or outlet valve in a drug infusion pump. The valve operates with a very small forward pressure, requires only a small amount of fluid in the valve chamber, and

A valve for use in medical applications is disclosed which is a highly precise, passive, one-way valve which makes an excellent inlet valve or outlet valve in a drug infusion pump. The valve operates with a very small forward pressure, requires only a small amount of fluid in the valve chamber, and operates in a positive and predictable fashion, even after an extended shelf life. The valve, may be inexpensively molded in one piece, thereby facilitating construction of a disposable pump, and may be installed with the portion of the pump housing contacting the top surface of the valve being flat, thereby further reducing manufacturing costs.

대표청구항 ▼

A one-way precision valve for medical applications, said valve for mounting between an upper housing portion having an essentially flat surface with an inlet aperture therein and a lower housing portion having an outlet portion therein, said valve being of one-piece manufacture and comprising: a rig

A one-way precision valve for medical applications, said valve for mounting between an upper housing portion having an essentially flat surface with an inlet aperture therein and a lower housing portion having an outlet portion therein, said valve being of one-piece manufacture and comprising: a rigid circular valve disk, wherein said valve disk is so arranged and configured as to be of a thickness sufficiently substantial to prevent said valve disk from exhibiting a significant amount of flexure even under high reverse pressure; a cylindrical dynamic sealing ridge protruding from the top side of said rigid circular valve disk, said dynamic sealing ridge for providing a sealing contact with said flat surface of said upper housing portion around said inlet aperture when said valve disk is urged toward said upper housing portion; a static seal ring for installation between said upper and lower housing portions in sealing fashion, said static seal ring being located circumferentially around and spaced away from said valve disk; and a relatively thin support web extending between said static seal ring and said valve disk for supporting said valve disk from said static seal ring, said support web being flat when in an unbiased position, said support web supporting said dynamic sealing ridge on said valve disk in position around said inlet aperture, said dynamic sealing ridge being located above the surface of said support web, said support web being elastomeric and functioning to bias said valve disk toward said upper housing portion to maintain said dynamic sealing ridge against said upper housing portion around said inlet aperture in sealing fashion until and unless a predetermined forward pressure drop exists across said valve, said support web having disposed therein a plurality of apertures to allow the passage of fluid therethrough.