Locking port shroud for peritoneal dialysis tubing connector

• US 4,895,570 A
• Filed: 05/13/1988
• Issued: 01/23/1990
• Est. Priority Date: 06/05/1987
• Status: Expired due to Term

• Current Assignee: Hospira Incorporated (Pfizer Inc.)
• Original Assignee: Abbott Laboratories
• Inventors: Larkin, Mark E.
• Primary Examiner(s): Yasko, John D.
• Application Number:
  US07/189,640
• Time in Patent Office: 620 Days
• Field of Search: 604/411-414, 604/905, 604/283, 604/29, 285/315, 285/319, 285/322
• US Class Current: 604/411
• CPC Class Codes: A61M 2039/1027 Quick-acting type connectors
• CPC Class Codes: A61M 2039/1033 Swivel nut connectors, e.g. threaded connectors, bayonet-connectors
• 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 tubing connector adapted for peritoneal dialysis connections between tubing sets and containers of dialysate. The connection prevents inadvertent disengagement of tubing sets.

Claims

1. A connection for medical tubing, comprising:

a first tube having a flange and a pierceable diaphragm;

a second tube having a piercing pin extending therefrom for piercing said diaphragm and an exterior annular flange rearward of said piercing pin;

a tubular collet, having a splayed end, slideable along said second tube and said pin, further including a cored-out slot defining a flexible finger, said finger having a detent means on an exterior surface; and

a tubular locking ring, slideable on said collet from a first position to a second position, including an annular cam on an interior surface;

said annular cam being adapted to engage said detent means on said collet in said first position without forcing said flexible finger radially inwardly, depress said detent means radially inwardly to a position within the diameter and forward of said second tube annular flange while said locking ring slides intermediate from said first to said second position, and release said detent means in said second position while forcing said flexible finger radially inwardly.

2. The connection as recited in claim 1 wherein said pin has a shoulder against which said port abuts when said pin is inserted into said port.

3. The connection as recited in claim 1 wherein said collet has an outward flange at the end opposite said splayed end, and said splayed end has an outward projection, whereby said locking ring is slideably retained in said collet between said flange and said projection.

4. The connection as recited in claim 1 wherein said splayed end is formed by a plurality of splayed sections separated from each other by elongated recesses, said locking ring completely covering said recesses when locked to prevent material from collecting on said pin-first tube connection.

5. The connection as recited in claim 1 wherein said pin has an outwardly projecting flange, and said collet has inwardly projecting locator means which engages said outward flange on the pin when the collet is in the locked position.

6. The connection as recited in claim 1 wherein said pin has a sleeve connecting it to said second tube, and further includes a shroud overlaying said sleeve to protect said sleeve.

7. The connection as recited in claim 1 wherein said collet is molded from plastic, and said splayed end is molded with splayed segments oriented outwardly from the longitudinal axis of said collet.

8. The connection as recited in claim 7 wherein said collet segments having memory to return to their outward orientation when said locking ring is retracted from said segments.

9. A connection for medical tubing, comprising:

a first tube having a flange and a pierceable diaphragm;

a second tube having a piercing pin extending therefrom for piercing said diaphragm;

a tubular collet, having a splayed end with gripper means, slideable along said second tube and said pin; and

a tubular locking ring disposed slideably on said collet;

said collet and locking ring having means for guiding said locking ring helically from said first to said second position.

10. The connection as recited in claim 9 wherein said pin has a shoulder against which said port abuts when said pin is inserted into said port.

11. The connection as recited in claim 9 wherein said collet has an outward flange at the end opposite said splayed end, and said splayed end has an outward projection, whereby said locking ring is slideably retained in said collet between said flange and projection.

12. The connection as recited in claim 9 wherein said splayed end is formed by a plurality of splayed sections separated from each other by elongated recesses, said locking ring completely covering said recesses when locked to prevent material from collecting on said pin-first tube connection.

13. The connection as recited in claim 9 wherein said pin has an outwardly projecting flange, and said collet has inwardly projecting locator means which engages said outward flange on the pin when the collet is in the locked position.

14. The connection as recited in claim 9 wherein said pin has a sleeve connecting it to said second tube, and further includes a shroud overlaying said sleeve to protect said sleeve.

15. The connection as recited in claim 9 wherein said collet is molded from plastic, and said splayed end is molded with splayed segments oriented outwardly from the longitudinal axis of said collet.

16. The connection as recited in claim 15 wherein said collet segments having memory to return to their outward orientation when said locking ring is retracted from said segments.

17. The connection as recited in claim 9 wherein said helical guide means comprises said collet and said locking ring, one of said collet and said locking means having a helical thread and the other having a corresponding helical channel in which said helical thread travels.