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US 5,535,785 AGranted
Luer-activated check valve
AssigneeNypro Inc.
InventorsRobert W. Werge, Peter N. Kotsifas
Life of this patent
Estimating the term…
Abstract
A Luer-activated valve constructed of a single-piece valve element with integral biasing base and ventilated riser disposed within a valve housing providing a valve seat and buttress for the biasing base.
Claims30
A flow control device comprising
- (a) a housing with internal walls defining a channel for the flow of fluid, with a step change from a first region with a first diameter to a second region with a second, larger diameter, providing a valve seat at said step change, and providing at least one buttress in said second region axially spaced from said valve seat;
- and
- (b) a single-piece valve element of resilient material comprising (i) a disk of a diameter greater than said first diameter and less than said second diameter;
- and (ii) an annular extension extending axially from one face with an outside diameter less than said first diameter defining an annular flange portion of said disk extending radially therefrom and an inner region adapted to engage resiliently a luer tip of diameter smaller than said first diameter;
- said valve element situated in said channel with said first annular extension situated within said first region of said channel, with said flange portion of said disk seated against said valve seat and a central portion of said disk, concentric with and of smaller diameter than said disk, opposite said annular extension engaging a portion of said buttress leaving free to move axially within said second region of said channel from said valve seat the portion of said flange radially outward from said central portion, thereby providing fluid communication between said first region and said second region.
2 more elements
A flow control device comprising
- (a) a housing with internal walls defining a channel for the flow of fluid, with a step change from a first region with a first diameter to a second region with a second, larger diameter, providing a valve seat at said step change, and providing at least one buttress in said second region axially spaced from said valve seat;
- and
- (b) a single-piece valve element of resilient material comprising (i) a disk of a diameter greater than said first diameter and less than said second diameter;
- (ii) an annular extension extending axially from one face with an outside diameter less than said first diameter defining an annular flange portion of said disk extending radially therefrom and an inner region adapted to engage resiliently a luer tip of diameter smaller than said first diameter;
- and (iii) a second annular extension extending substantially axially from the opposite face with a maximum outside diameter less than said second diameter;
- said valve element situated in said channel with said first annular extension situated within said first region of said channel, with said flange portion of said disk seated against said valve seat and said second annular extension pressed against said buttress, said flange portion axially separable from said valve seat upon sufficient pressure upon said first annular extension to allow fluid to communicate from said first region to said second region.
3 more elements
A flow control device comprising
- (a) a housing with internal walls defining a channel for the flow of fluid, with a step change from a first region with a first diameter to a second region with a second, larger diameter, providing a valve seat at said step change, and providing at least one buttress in said second region extending at a point radially inward of said first diameter axially in the direction of said first region more than at the radially outward portions of said buttress;
- and
- (b) a single-piece valve element of resilient material comprising (i) a disk of a diameter greater than said first diameter and less than said second diameter;
- and (ii) an annular extension extending axially from one face with an outside diameter less than said first diameter defining an annular flange surface of said disk extending radially therefrom;
- said valve element situated in said channel with said annular extension situated within said first region of said channel, with said flange surface of said disk seated against said valve seat and a central portion of said disk opposite said annular extension engaging said extension of said buttress leaving tree to move axially within said second region of said channel from said valve sat the radially outward portion of said flange.
2 more elements
Dependencies are inferred from the claim text.