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A valve mechanism for a needleless connector employs a deformable piston having a piston head of elliptical cross-section with a marquise-shaped bore formed along its longitudinal axis wherein the major axes of the respective generally elliptical shapes are oriented perpendicular to one another. The

A valve mechanism for a needleless connector employs a deformable piston having a piston head of elliptical cross-section with a marquise-shaped bore formed along its longitudinal axis wherein the major axes of the respective generally elliptical shapes are oriented perpendicular to one another. The piston head is captured within the connector housing and is reciprocal between a section of reduced diameter adjacent the connection port and a section of enlarged diameter. Constraining the piston head into the section of reduced diameter causes the elliptical bore to be squeezed shut while positioning the piston head in the section of enlarged diameter causes the piston head to relax and assume its natural elliptical shape, while the bore similarly regains its natural open shape to provide a fluid path therethrough. A compressible or extendible section affixed to the piston head serves to bias the piston into the section of reduced diameter. A tapered section of the piston contacts the housing to secure the top of the piston flush with the top of the housing for ease in cleaning.

대표청구항 ▼

A needleless connector valve comprising: a hollow housing having a connection port and exit orifice wherein the housing includes a first section of a first preselected cross-sectional shape and size disposed directly adjacent the connection port and a second section of a second preselected cross-sec

A needleless connector valve comprising: a hollow housing having a connection port and exit orifice wherein the housing includes a first section of a first preselected cross-sectional shape and size disposed directly adjacent the connection port and a second section of a second preselected cross-sectional shape and size situated adjacent the first section; a resiliently deformable piston head, having a bore formed therethrough, received within the housing so as to be shiftable between the first and second sections, wherein positioning of the piston head within the first section causes it to be deformed so as to occlude the bore while positioning of the piston head within the second section allows the piston head to assume its un-deformed state in which the bore is un-occluded to thereby provide a fluid path between the connection port and the exit orifice; and means for biasing the piston head into the first section to close off the fluid path.