Safety indwelling syringe

• US 20030163095A1
• Filed: 02/28/2002
• Published: 08/28/2003
• Est. Priority Date: 02/28/2002
• Status: Active Grant

• Current Assignee: Medikit Co., Ltd.
• Original Assignee: Medikit Co., Ltd.
• Inventors: Nakashima, Noboru
• Granted Patent: US 7,060,053 B2
• Time in Patent Office: Days
• US Class Current: 604/263
• CPC Class Codes: A61M 25/0631 having means for fully covering the needle after its withdrawal, e.g. needle being withdrawn inside the handle or a cover being advanced over the needle
• CPC Class Codes: A61M 25/0637 Butterfly or winged devices, e.g. for facilitating handling or for attachment to the skin
• CPC Class Codes: A61M 5/3243 being axially-extensible, e.g. protective sleeves coaxially slidable on the syringe barrel devices for protecting guide needles in combination with catheters A61M25/0612

Abstract

A safety indwelling syringe has a hollow needle to be inserted into the body of a patient, a fixed sheath fixing the hollow needle and covering the needle partly, and a protective sheath slidably fitted to the fixed sheath. The hollow needle is exposed when used. After use, the protective sheath is pulled out toward the tip of the hollow needle so as to cover the needle entirely.

Claims

1. A safety indwelling syringe, comprising:

a hollow needle to be inserted into a body of a patient;

a fixed sheath fixing the hollow needle and covering the needle partly; and

a protective sheath slidably fitted to the fixed sheath;

wherein,

the protective sheath is pulled away from the fixed sheath toward the tip of the hollow needle, covering the needle entirely.

2. A safety indwelling syringe as set forth in claim 1, wherein the protective sheath is slidably fitted inside the fixed sheath.

3. A safety indwelling syringe as set forth in claim 1, wherein the protective sheath Is slidably fitted outside the fixed sheath.

4. A safety indwelling syringe as set forth in claim 1, wherein the protective sheath comprises two or more slide a sheaths.

5. A safety indwelling syringe as set forth in claim 1, further comprising:

a pair of wings;

wherein,

at least one of the two wings is coupled to the protective sheath to be pulled for pulling out the protective sheath.

6. A safety indwelling syringe as set forth in claim 5, therein:

the other wing of the two wings is coupled to the fixed sheath; and

the hollow needle is exposed when the two wings are aligned symmetrically, and the hollow needle is covered by the protective sheath when the two wings are slid in directions to distance the wings from one another.

7. A safety indwelling syringe, comprising;

a hollow needle to be inserted into a body of a patient;

a fixed sheath fixing the hollow needle and covering the needle partly; and

a protective sheath slidably fitted to the fixed sheath;

wherein,

the protective sheath and the fixed sheath have a locking means for restricting the sliding movement of the sheaths from one another, and the protective sheath is pulled out from the fixed sheath toward the tip of the hollow needle and locked, covering the needle entirely.

8. A safety indwelling syringe as set forth in claim 7, wherein the locking means comprises a locking slot and a locking projection.

9. A safety indwelling syringe as set forth in claim 8, wherein:

each of the fixed sheath and the protective sheath has a wing, and when the wings are aligned symmetrically, the hollow needle is exposed, and when the sheaths are slid in directions to distance the wings from one another and locked, the protective sheath covers the hollow needle entirely.

10. A safety indwelling syringe, comprising:

a hollow needle to be inserted into a body of a patient;

a plurality of telescopic sheaths covering part of the hollow needle;

a protective sheath being prevented from slipping out from inside the telescopic sheaths, and having an elongated shape to be inserted into a catheter for supporting the catheter at a front end thereof; and

a flexible adapter fixed on an outer periphery of a proximal end portion of the protective sheath;

wherein,

the protective sheath covers the hollow needle entirely when the telescopic sheaths are extended.

11. A safety indwelling syringe as set forth in claim 10, wherein the flexible adapter is made from rubber.