Puncturing device

• US 6,248,120 B1
• Filed: 01/10/2000
• Issued: 06/19/2001
• Est. Priority Date: 01/10/2000
• Status: Expired due to Term

• Current Assignee: HTL - Strefa Spolka Z OO
• Original Assignee: P. Z. "Htl" Spolka Akcyjna
• Inventors: Wyszogrodzki, Wojciech
• Primary Examiner(s): TRUONG, KEVIN THAO
• Application Number:
  US09/479,948
• Time in Patent Office: 526 Days
• Field of Search: 606/181, 606/182, 606/183, 606/184, 606/185, 606/188
• US Class Current: 606/182
• CPC Class Codes: A61B 5/150022 for capillary blood or interstitial fluid
• CPC Class Codes: A61B 5/150412 Pointed piercing elements, e.g. needles, lancets for piercing the skin blade-like piercing elements A61B5/150442
• CPC Class Codes: A61B 5/150908 by disconnecting components, e.g. breaking or rupturing of connected parts, e.g. piston and rod
• CPC Class Codes: A61B 5/15111 Semi-automatically triggered, e.g. at the end of the cocking procedure, for instance by biasing the main drive spring or when reaching sufficient contact pressure, the piercing device is automatically triggered without any deliberate action by the user
• CPC Class Codes: A61B 5/15117 comprising biased elements, resilient elements or a spring, e.g. a helical spring, leaf spring, or elastic strap
• CPC Class Codes: A61B 5/15144 comprising driving means, e.g. a spring, for retracting the piercing unit into the housing

Abstract

A puncturing device according to the invention comprises a sleeve (1), a push element (2) mounted at one end of the sleeve (1), a piston (5) having a puncturing tip (7) slidably mounted in the sleeve (1), a drive spring (9) positioned between the face end of the push element (2) and the piston (5) and a return spring (10) positioned inside the said sleeve (1) between its bottom (3) with an opening (4) for the puncturing tip (7) and the said piston (5) characterized in that the sleeve (1) has wings (11) directed inwardly and the projection (12) of the piston (5) rests on the said wings (11).

Claims

1. A puncturing device comprising a sleeve, a push element mounted at one end of the sleeve, a piston with a puncturing tip slidably mounted in the sleeve, a drive spring positioned between a face end of the push element and the piston and a return spring positioned inside the sleeve between another end of the sleeve and the piston, wherein the sleeve (1) has breakable wings (11) directed inwardly and the piston (5) has an external projection (12) which rests on said wings (11).

2. A puncturing device comprising a sleeve, a push element mounted at one end of the sleeve, a piston with a puncturing tip slidably mounted in the sleeve, a drive spring positioned between a face end of the push element and the piston and a return spring positioned inside the sleeve between another end of the sleeve and the piston, wherein a washer including breakable wings (11) rests on an outer ring positioned on the top of the sleeve (1), and wherein the piston (5) has an external projection (12) which rests on said wings (11).

3. A puncturing device comprising a sleeve, a push element mounted at one end of the sleeve, a piston with a puncturing tip slidably mounted in the sleeve, a drive spring positioned between a face end of the push element and the piston and the return spring positioned inside the sleeve between another end of the sleeve and the piston, wherein the piston (5) at its outer rim includes a flange (15) which, in a pre-operation state, rests on the top of the sleeve (1) and, in an operational state, detaches from the piston (5) when pressure is applied at the push element (2).

4. A puncturing device according to claim 3 wherein the flange (15) comprises a ring (16) which is in communication with the piston (5) by breakable fasteners (17).