Blood sampling device

• US 20080009806A1
• Filed: 07/10/2006
• Published: 01/10/2008
• Est. Priority Date: 07/10/2006
• Status: Abandoned Application

• Current Assignee: Biotop Holding Company Limited
• Original Assignee: Biotop Holding Company Limited
• Inventors: Chang, Jia-Ming
• Application Number:
  US11/483,013
• Publication Number:
  US 20080009806A1
• Time in Patent Office: Days
• US Class Current: 604/198
• CPC Class Codes: A61B 5/15003 for venous or arterial blood
• CPC Class Codes: A61B 5/150351 Caps, stoppers or lids for sealing or closing a blood collection vessel or container, e.g. a test-tube or syringe barrel caps for bottles or containers in general B65D41/00
• CPC Class Codes: A61B 5/150389 Hollow piercing elements, e.g. canulas, needles, for piercing the skin
• CPC Class Codes: A61B 5/150503 Single-ended needles hollow piercing element tip design A61B5/150396, needle sets for catheters A61M25/06, needles for bringing media into the body A61M5/32
• CPC Class Codes: A61B 5/150648 fully automatically triggered, i.e. the triggering of the protective sleeve does not require a deliberate action by the user such as terminating the contact with the patient's skin
• CPC Class Codes: A61B 5/153 Devices specially adapted for taking samples of venous or arterial blood, e.g. with syringes
• CPC Class Codes: A61M 2005/3236 Trigger provided at the distal end, i.e. syringe end for mounting a needle

Abstract

A blood sampling device has a barrel, an inner tube, a base and a spring. The barrel has a front end, a rear end, a pipe and a cap. The pipe is formed on the front end. The cap is formed on the rear end. The inner tube is mounted in the barrel. The base is mounted in the inner tube to mount a needle hub and has multiple flexible tabs. The flexible tabs extend from the base and abut with the inner tube. The spring is mounted around the base. After pushing the cap into the rear end, the inner tube is moved toward the front end to squeeze the flexible tabs and the spring. Then, the base is retracted into inner tube automatically with the resilient force provided by the spring. Therefore, a user can be protected from being pricked by a used outer needle.

Claims

1. A blood sampling device comprising

a barrel being hollow and comprising

an inner surface;

a front end being closed and comprising an inner surface;

a rear end;

a through hole defined through the front end;

a pipe formed on the inner surface of the front end and comprising a free end;

at least one rib formed on the inner surface near the front end;

an opening defined on the rear end; and

a cap extending from the opening and comprising

an inner surface;

a circumference; and

at least one protrusion formed along the circumference and on the inner surface;

an inner tube mounted in the barrel and comprising

a front end;

a rear end;

an inner surface; and

an annular flange radially protruding on the front end and comprising a bottom abutting with the at least one rib;

a base being cylindrical, mounted in the inner tube, and comprising

a center;

an outer circumference;

an axis;

an upper portion;

an lower portion;

a center through hole defined in the center of the base;

at least one tab protruding on the outer circumference; and

multiple flexible tabs extending from the lower portion and selectively abutting with the annular flange; and

a spring mounted around the upper portion of the base and comprising

two ends, wherein one end abuts against the inner surface of the front end of the barrel and the other end abuts against the tab of the base;

a needle hub mounted in the base and comprising

an inner needle passing through the center through hole of the base; and

an outer needle passing through the through hole of the barrel.

2. The blood sampling device as claimed in claim 1, wherein

the pipe comprises multiple notches defined in the free end;

and

the flexible tabs correspond respectively to the notches.

3. The blood sampling device as claimed in claim 2, wherein the inner tube comprises multiple longitudinal grooves defined through the inner tube.

4. The blood sampling device as claimed in claim 3, wherein the inner tube comprises a stop protruding on the inner surface of the inner tube near the rear end.

5. The blood sampling device as claimed in claim 4, wherein the barrel comprises two finger flanges respectively extending from the rear end.

6. The blood sampling device as claimed in claim 5, wherein the barrel has multiple ribs corresponding to each other.

7. A barrel assembly for blood sampling device comprising

a barrel being hollow and comprising

an inner surface;

a front end being closed and comprising an inner surface;

a rear end;

a through hole defined through the front end;

a pipe formed on the inner surface of the front end and comprising a free end;

at least one rib formed on the inner surface near the front end;

an opening defined on the rear end; and

a cap extending from the opening and comprising

an inner surface;

a circumference; and

at least one protrusion formed along the circumference and on the inner surface;

an inner tube mounted in the barrel and comprising

a front end;

a rear end;

an inner surface; and

an annular flange radially protruding on the front end and comprising a bottom abutting with the at least one rib;

a base being cylindrical, mounted in the inner tube, and comprising

a center;

an outer circumference;

an axis;

an upper portion;

an lower portion;

a center through hole defined in the center of the base;

at least one tab protruding on the outer circumference; and

multiple flexible tabs extending from the lower portion and selectively abutting with the annular flange; and

a spring mounted around the upper portion of the base and comprising

two ends, wherein one end abuts against the inner surface of the front end of the barrel and the other end abuts against the tab of the base.

8. The barrel assembly for blood sampling device as claimed in claim 7, wherein

the pipe comprises multiple notches defined in the free end;

and

the flexible tabs correspond respectively to the notches.

9. The barrel assembly for blood sampling device as claimed in claim 8, wherein the inner tube comprises multiple longitudinal grooves defined through the inner tube.

10. The barrel assembly for blood sampling device as claimed in claim 9, wherein the inner tube comprises a stop protruding on the inner surface of the inner tube near the rear end.

11. The barrel assembly for blood sampling device as claimed in claim 10, wherein the barrel comprises two finger flanges respectively extending from the rear end.

12. The barrel assembly for blood sampling device as claimed in claim 11, wherein the barrel has multiple ribs corresponding to each other.