×

Apparatus and method for a catheter adapter with valve

  • US 5,085,645 A
  • Filed: 08/15/1990
  • Issued: 02/04/1992
  • Est. Priority Date: 08/15/1990
  • Status: Expired due to Fees
First Claim
Patent Images

1. An over the needle catheter with a needle and hub assembly and a catheter adapter having an integral valve comprising:

  • a catheter adapter having a distal part and a proximal part joined together to form a passage therethrough along an axis thereof, the distal part connecting to a catheter tube for providing fluid communication therewith and through the passage;

    a valve assembly positioned within the passage about the axis and having an elongate resilient member captured within the passage and between the distal part and the proximal part for a compression fit therebetween to thereby normally prevent fluid communication through the passage;

    a proximal portion of the valve assembly provided to be engaged by a fluid dispenser fitting shaped to extend into the passage of the proximal part and axially compress the elongate resilient member when the fluid dispenser fitting is within the catheter adapter proximal part;

    a valve seat disposed within the passage and on the proximal part, the valve seat being formed as a generally frusto conical surface located coaxial about the axis and facing the distal part of the catheter adapter in position to engage a chamfered surface on the elongate resilient member to form a seal therebetween preventing fluid communication when the elongate resilient member is compressed between the distal part and the proximal part and allowing fluid communication when the seal is broken by axial compression of the elongate resilient member by the fluid dispenser fitting;

    a needle hub assembly having a hub which conjugates with the proximal part of the catheter adapter and a needle on the hub extending from the hub and through the passage when the hub is conjugated with the proximal part of the catheter adapter, andan internal cavity on the elongate resilient member extending axially and distally from the chamfered surface to a septum like end across the elongate resilient member for permitting the needle to pass through the septum like end in a resealable fashion upon placement and withdrawal of the needle therethrough.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×