Securing collar for cannula connector

• US 5,437,650 A
• Filed: 01/11/1995
• Issued: 08/01/1995
• Est. Priority Date: 03/23/1993
• Status: Expired due to Fees

• Current Assignee: Hospira Incorporated (Pfizer Inc.)
• Original Assignee: Abbott Laboratories
• Inventors: Kramer, Dvid E., Larkin, Mark E., Frederick, Warren P.
• Primary Examiner(s): Yasko, John D.
• Assistant Examiner(s): CERMAK, ADAM
• Application Number:
  US08/371,317
• Time in Patent Office: 202 Days
• Field of Search: 604/83, 604/86, 604/88, 604/167, 604/256, 604/283, 604/284, 604/905, 285/24, 285/315, 285/27, 285/322
• US Class Current: 604/536
• CPC Class Codes: A61M 2039/1027 Quick-acting type connectors
• CPC Class Codes: A61M 2039/1072 with a septum present in the connector
• CPC Class Codes: A61M 39/045 pre-slit to be pierced by blunt instrument
• CPC Class Codes: A61M 39/1011 Locking means for securing connection; Additional tamper safeties A61M39/16 takes precedence
• CPC Class Codes: Y10S 604/905 Aseptic connectors or couplings, e.g. frangible, piercable

Abstract

A securing collar is used in combination with two tubular flow connectors to prevent the inadvertent disconnection of I.V. tubing sets. The securing collar includes a housing supported by one of the connectors, a radial flange extending from the housing, a tubular collar having a outwardly splayed end, at least two notches that separates the splayed collar into at least two elongated segments, a transition portion on the exterior of the collar, and a sliding annular locking ring. The locking ring slides on the collar from the proximal end over the transition portion to the distal segments so that the annular locking ring forces the splayed and segmented distal portions radially inward to grip the second connector.

Claims

1. A securable collar assembly for use with a fluid connector having an axially forward extending cannula for securably connecting the fluid connector to a tubular conduit having a septum at a terminal end and a radial shoulder proximate the septum, the collar assembly comprising:

a tubular housing axially engaged with the fluid connector so that the cannula of the fluid connector extends axially forward from the housing;

a generally radially extending, resiliently deflectable flange extending from the housing;

a hollow generally cylindrical collar extending longitudinally from the flange and coaxially with the cannula to an open forward end;

the hollow collar having an inner surface defining a bore for receiving the terminal end of the tubular conduit and a radially inward extending lip on the inner surface of the collar at the open forward end of the collar;

the collar having an outer surface including a first portion adjacent the flange having a first maximum diameter and a second portion between the first portion and the open end of the collar having a second minimum diameter which is larger than the first maximum diameter;

the collar having two diametrically opposed notches, each notch extending longitudinally rearward from the open forward end of the collar through the first and second portions of the collar to a notch closed end adjacent the flange so as to divide the collar into two longitudinal semi-cylindrical segments; and

a ring longitudinally slidable along the outer surface of the collar from a first rear position on the first portion to a second forward position on the second portion, the ring having an inner diameter which is smaller than the second minimum diameter of the collar so as to compress the outer surface of the second portion when the ring is slid to the second forward position so as to pivot the two longitudinal segments of the collar radially inward at the deflectable flange so that the inward lip at the open forward end of the collar engages the radial shoulder of the tubular conduit.

2. The collar assembly of claim 1 wherein the longitudinal segments pivot along a portion of the radial flange, the flange portion being generally parallel to a longitudinal plane which bisects both longitudinal notches.

3. The collar assembly of claim 2 wherein at least the second portion of the outer surface of the collar is frustoconical-shaped.

4. The collar assembly of claim 3 further including means on the collar for restraining the slidable ring in the first and second positions.

5. The collar assembly of claim 4 wherein the restraining means includes at least one outward projection located between the first and second portions, and wherein at least one outward projection is inclined radially outward from both the first maximum diameter and second minimum diameter.

6. The collar assembly of claim 5 wherein the restraining means includes two outward projections, each projection on a separate one of the two longitudinal segments and each projection flanking a separate one of the two longitudinal notches.

7. The collar assembly of claim 4 further including means for limiting the relative rotation of the sliding ring on the collar in the first rear position.

8. The collar assembly of claim 7 wherein the rotation limiting means is a slot on the slidable ring constructed and arranged to axially register in a raised tab on the outer surface of first portion of the collar.

9. The collar assembly of claim 4 wherein at least a first portion of the inner surface of the collar adjacent the open end of the collar is frustoconical-shaped.

10. The collar assembly of claim 9 further including a radially outward extending shoulder on the outer surface of the second portion at the open forward end of the collar to prevent axial removal of the ring from the collar when the ring is in the second forward position.

11. The collar assembly of claim 3 wherein the first portion of the outer surface of the collar is frustoconical-shaped.

12. The collar assembly of claim 11 further including means on the collar for restraining the slidable ring in the first and second positions wherein the restraining means includes at least one outward projection located between the first and second positions, the projection inclined radially outward from both the first maximum diameter and the second minimum diameter.

13. The collar assembly of claim 12 wherein the first and second portions of the outer surface of the collar is a continuous frustoconical-shape.

14. The collar assembly of claim 13 wherein the inner surface of the collar is frustoconical-shaped.

15. The collar assembly of claim 14 further including a radially outward extending lip on the outer surface of the second portion at the open end of the collar to prevent axial removal of the ring from the collar when the ring is in the second forward position.