Cannula with protection cap for medical infusion lines and the like

• US 20040153038A1
• Filed: 07/25/2003
• Published: 08/05/2004
• Est. Priority Date: 07/26/2002
• Status: Active Grant

• Current Assignee: Industrie Borla S.P.A. (Carla Finanziaria SRL)
• Original Assignee: Industrie Borla S.P.A. (Carla Finanziaria SRL)
• Inventors: Guala, Gianni
• Granted Patent: US 7,247,153 B2
• Time in Patent Office: Days
• US Class Current: 604/263
• CPC Class Codes: A61M 39/10 Tube connectors; Tube couplings A61M39/02 takes precedence; connecting needles to syringes or hubs A61M5/34; connecting catheter tubes to hubs A61M25/0014
• CPC Class Codes: A61M 39/14 for connecting tubes having sealed ends needle sets A61M5/162; having valves closing automatically on disconnection of line A61M39/26
• CPC Class Codes: A61M 39/20 Closure caps or plugs for connectors or open ends of tubes
• CPC Class Codes: A61M 5/3202 Devices for protection of the needle before use, e.g. caps A61M5/50 takes precedence; for infusion spikes A61M5/1626; protectors for sharps A61B50/3001
• CPC Class Codes: A61M 5/347 rotatable, e.g. bayonet or screw A61M5/344 takes precedence

Abstract

Cannula with protection cap for medical infusion lines and the like, comprising a hollow body provided at one end with a female luer lock connector and at the other end with an axial tubular ferrule. The hollow body and the protection cap are provided with respective formations for mutual torsional coupling acting in the direction of rotation corresponding to the unscrewing of the female luer lock connector relative to a male luer lock connector of the medical line.

Claims

1. A cannula (1) with protection cap (2) for medical infusion lines and the like, in which said cannula (1) comprises a hollow body (3) defining at a first end (6) a female luer lock connector (4-5) and bearing at a second end (8) an axial tubular ferrule (7), wherein said protection cap (2) is applied in removable fashion to said hollow body (3) in such a way as to enclose said tubular ferrule (7), and wherein said hollow body (3) and said protection cap (2) are provided with respective formations (9, 12;

15, 16) for mutual torsional coupling acting in the direction corresponding to the direction of unscrewing of said female luer lock connector (4-5) relative to a male luer lock connector.

2. Cannula as claimed in claim 1, wherein said formations include complementary lateral teeth sets (9, 12) formed respectively on the outer lateral wall of said hollow body (3) and on the inner lateral wall of said protection cap (2).

3. Cannula as claimed in claim 1, wherein said formations include complementary front teeth sets (15, 16) formed respectively in correspondence with said second end (8) of the hollow body (3) and on an inner annular flange (13) of said protection cap (2).

4. Cannula as claimed in claim 2, wherein said complementary teeth sets (9, 12;

15, 16) are so shaped as to torsionally couple said protection cap (2) and said hollow body (3) permanently in the aforesaid direction of rotation corresponding to the unscrewing of said female luer lock connector (4-5), and temporarily until a predetermined torque is reached in the opposite direction of rotation, thereby preventing screwing with excessive torque.

5. Cannula as claimed in claim 3, wherein said complementary teeth sets (9, 12;

15, 16) are so shaped as to torsionally couple said protection cap (2) and said hollow body (3) permanently in the aforesaid direction of rotation corresponding to the unscrewing of said female luer lock connector (4-5), and temporarily until a predetermined torque is reached in the opposite direction of rotation, thereby preventing screwing with excessive torque.

6. Cannula as claimed in claim 4, wherein said complementary teeth sets (9, 12;

15, 16) have substantially saw tooth shape.

7. Cannula as claimed in claim 5, wherein said complementary teeth sets (9, 12;

15, 16) have substantially saw tooth shape.

8. Cannula as claimed in claim 4, wherein said cap (2) is formed externally with manual actuation parts (10).

9. Cannula as claimed in claim 5, wherein said cap (2) is formed externally with manual actuation parts (10).