Lancet device for puncturing the skin

• US 5,366,469 A
• Filed: 04/02/1993
• Issued: 11/22/1994
• Est. Priority Date: 04/16/1992
• Status: Expired due to Term

• Current Assignee: HaeMedic AB (Medical Technology Solutions LLC)
• Original Assignee: Arta Plast AB (ARTA Holding AB)
• Inventors: Seidl, Helmut, Steg, Hans-Henning
• Primary Examiner(s): Pellegrino, Stephen C.
• Assistant Examiner(s): LEWIS, WILLIAM W
• Application Number:
  US08/042,616
• Time in Patent Office: 599 Days
• Field of Search: 606/181-185, 128/770, 128/667
• US Class Current: 606/182
• CPC Class Codes: A61B 17/32093 for skin incisions
• CPC Class Codes: A61B 5/150022 for capillary blood or interstitial fluid
• CPC Class Codes: A61B 5/150435 Specific design of proximal end
• CPC Class Codes: A61B 5/150549 Protectors removed by rotational movement, e.g. torsion or screwing
• CPC Class Codes: A61B 5/150618 Integrally moulded protectors, e.g. protectors simultaneously moulded together with a further component, e.g. a hub, of the piercing element
• CPC Class Codes: A61B 5/150717 manually removed
• CPC Class Codes: A61B 5/15105 Purely manual piercing, i.e. the user pierces the skin without the assistance of any driving means or driving devices
• 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 5/1513 comprising linear sliding guides comprising tooth-shaped elements A61B5/15132
• CPC Class Codes: A61B 5/15142 Devices intended for single use, i.e. disposable
• CPC Class Codes: A61B 5/15144 comprising driving means, e.g. a spring, for retracting the piercing unit into the housing

Abstract

A lancet device for puncturing the skin of mammals, especially humans, has a bushing with a grip portion and opposite the grip portion a free end defining a plane. An insert is axially slidably connected within the bushing. The insert has a first and a second end, with the first end having a grip element and the second end having a projecting lancet with a tip for puncturing the skin. The grip element comprises a diaphragm with a preset pressure point, and upon surpassing the pressure point of the diaphragm with an axially directed force in the direction toward the free end of the bushing, the lancet is released with a preset impulse via the insert and penetrates the plane defined by the free end to puncture the skin.

Claims

1. A lancet device for puncturing the skin of mammals, said lancet device comprising:

a bushing having a grip portion and opposite said grip portion a free end defining a plane;

an insert axially slidably connected within said bushing, said insert having a first and a second end, said first end having a grip element and said second end having a projecting lancet with a tip for puncturing the skin; and

said grip element comprising a diaphragm with a preset pressure point in the form of a spring-elastic body having a concave cross-section, wherein in an initial state of said diaphragm the outer convex curvature is axially outward relative to said bushing and, upon surpassing said pressure point of said diaphragm with an axially directed force in the direction toward said free end of said bushing, said lancet is released via said insert with a preset impulse and penetrates said plane defined by said free end to puncture the skin.

2. A lancet device according to claim 1, wherein said diaphragm is a plate-shaped body having a concave cross-section.

3. A lancet device according to claim 1, wherein said insert and said grip element with said diaphragm form a unitary part.

4. A lancet device according to claim 1, wherein said insert has a shaft with first projections and wherein said bushing has an interior with second projections, with said first projections interlocking with said second projections upon insertion of said insert into said bushing.

5. A lancet device according to claim 4, wherein said insert further comprises a cover element connected to said second end for enclosing said lancet in a sterile manner.

6. A lancet device according to claim 5, wherein said insert and said cover element form a unitary part.

7. A lancet device according to claim 6, wherein said cover element has a transition into said second end of said insert, said transition having a designated breakage zone.

8. A lancet device according to claim 7, wherein said designated breakage zone is a radial recess.

9. A lancet device according to claim 5, wherein said cover element has a segment projecting from said bushing when said shaft with said first projections is interlocked with said second projections of said bushing, said segment forming a grip.

10. A lancet device according to claim 9, wherein said grip has a substantially oval cross-section.

11. A lancet device according to claim 4, wherein said grip portion is a plate-shaped body supporting said grip element of said insert when said shaft with said first projections is interlocked with said second projections of said bushing.

12. A lancet device according to claim 1, wherein said bushing has a substantially oval cross-section.

13. A lancet device according to claim 1, wherein said insert further comprises first blocking elements and said bushing further comprises second blocking elements, said first blocking elements engaging said second blocking elements for blocking a further release of said lancet after said lancet has been used once.