Single use lancet assembly

• US 6,258,112 B1
• Filed: 11/02/1999
• Issued: 07/10/2001
• Est. Priority Date: 11/02/1999
• Status: Expired due to Fees

• Current Assignee: Stat Medical Devices Incorporated
• Original Assignee: Stat Medical Devices Incorporated
• Inventors: Schraga, Steven
• Primary Examiner(s): Chaudhuri, Olik
• Assistant Examiner(s): Trinh, Hoa B.
• Application Number:
  US09/432,351
• Time in Patent Office: 616 Days
• Field of Search: 606/181-183, 606/185, 606/188, 606/167
• US Class Current: 606/181
• 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 5/150564 Protectors removed by pulling or pushing
• 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 5/15113 Manually triggered, i.e. the triggering requires a deliberate action by the user such as pressing a drive button
• 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 single use lancet device having a housing, with an open interior and an access opening defined therein, a lancet, with a body and a piercing tip, and disposed in the open interior of the housing so as to move between a cocked orientation and a piercing orientation, a driving assembly structured to move the lancet into the piercing orientation, and a restrictor assembly having a shoulder element and a restrictor panel operatively associated with the lancet and the housing and structured to pass over the restrictor panel upon the lancet moving from its cocked orientation to its piercing orientation, and to abut the restrictor panel upon attempted movement of the lancet back into its cocked orientation after movement into the piercing orientation, thereby preventing the lancet from moving back into the cocked orientation and preventing re-use of a contaminated piercing tip.

Claims

1. A single use lancet device comprising:

a housing, said housing including an open interior and an access opening defined therein;

a lancet, said lancet including a body and a piercing tip;

said lancet disposed in said open interior of said housing and structured to move at least between a cocked orientation and a piercing orientation;

a driving assembly structured to move said lancet at least temporarily into said piercing orientation; and

a restrictor assembly structured to substantially prevent said lancet from moving completely into said cocked orientation after said lancet has moved at least temporarily into said piercing orientation.

2. A single use lancet as recited in claim 1 wherein said driving assembly includes a biasing element operatively disposed between said lancet and said housing.

3. A single use lancet as recited in claim 2 wherein said biasing element comprises a spring.

4. A single use lancet as recited in claim 1 further comprising an actuation assembly structured to release said lancet from said cocked orientation.

5. A single use lancet as recited in claim 4 wherein said actuation assembly comprises a button structured to at least temporarily protrude from said housing when said lancet is disposed in said cocked orientation.

6. A single use lancet as recited in claim 5 wherein said button is secured to said lancet and is structured to abut said housing when protruding therethrough so as to retain said lancet in said cocked orientation until disengaged from said abutting engagement.

7. A single use lancet as recited in claim 6 wherein said button is structured to be at least temporarily concealed by said housing after said lancet has moved out of said cocked orientation.

8. A single use lancet as recited in claim 1 wherein said restrictor assembly comprises and abutment structure cooperatively disposed between said housing and said lancet and structured to prevent said lancet from moving into said cocked orientation after movement into said piercing orientation.

9. A single use lancet as recited in claim 8 wherein said abutment structure comprises a shoulder element and a restrictor panel, said restrictor panel and said shoulder element structured to pass one another upon said lancet moving from said cocked orientation to said piercing orientation, and to abut one another upon attempted movement of said lancet into said cocked orientation after movement into said piercing orientation.

10. A single use lancet as recited in claim 9 wherein said shoulder element includes a sloped, at least partially biased configuration structured to at least partially retract to facilitate passage of said restrictor panel and said shoulder element past one another in a first direction corresponding movement of said lancet from said cocked orientation to said piercing orientation, and to expand subsequent said passage past one another in said first direction such that said shoulder element and said restrictor panel abut one another upon movement towards one another in a second direction generally opposite said first direction.

11. A single use lancet as recited in claim 9 wherein said shoulder element comprises a biased finger extending from said lancet, and said restrictor panel comprises a protruding element protruding from said housing.

12. A single use lancet as recited in claim 11 wherein said protruding element includes a sloped configuration which downwardly slopes away from said piercing tip of said lancet so as to facilitate passage thereof past said biased finger upon said lancet moving in a first direction towards said access opening.

13. A single use lancet as recited in claim 12 wherein said biased finger comprises an actuation button structured to release said lancet from said cocked orientation.

14. A single use lancet as recited in claim 1 further comprising a guide assembly operatively disposed between said lancet and said housing and structured to guide a substantially linear movement of said lancet through said housing.

15. A single use lancet as recited in claim 14 wherein said guide assembly comprises at least one guide ridge protruding from said body of said lancet, and at least one corresponding guide track structured to movably receive said guide ridge therein and extending at least partially along a length of said open interior of said housing.

16. A single use lancet as recited in claim 1 further comprising a protective cover structured to at least partially and removably cover said piercing tip of said lancet at least prior to movement of said lancet into said cocked orientation.

17. A single use lancet as recited in claim 16 wherein said protective cover is structured to protrude from said access opening of said housing and is structured to be pushed by a user so as to position said lancet into said cocked orientation.

18. A single use lancet device comprising:

a housing, said housing including an open interior and an access opening defined therein;

a lancet, said lancet including a body and a piercing tip;

said lancet disposed in said open interior of said housing and structured to move at least between a cocked orientation and a piercing orientation;

a driving assembly structured to move said lancet at least temporarily into said piercing orientation;

a shoulder element and a restrictor panel operatively associated with said lancet and said housing, said shoulder element structured to pass over said restrictor panel upon said lancet moving from said cocked orientation to sail piercing orientation, and to abut said restrictor panel upon attempted movement of said lancet into said cocked orientation after movement into said piercing orientation so as to substantially prevent said lancet from moving completely into said cocked orientation after said lancet has moved at least temporarily into said piercing orientation; and

an actuation button structured to at least temporarily protrude from said housing when said lancet is disposed in said cocked orientation so as to maintain said lancet in said cocked orientation.

19. A single use lancet as recited in claim 18 wherein said shoulder element comprises said actuation button.

20. A single use lancet as recited in claim 18 wherein said shoulder element extends from said lancet and said restrictor panel is at least partially secured to said housing.

21. A single use lancet as recited in claim 18 further comprising a protective cover structured to at least partially and removably cover said piercing tip of said lancet at least prior to movement of said lancet into said cocked orientation.

22. A single use lancet as recited in claim 21 wherein said protective cover is structured to protrude from said access opening of said housing and is structured to be pushed by a user so as to position said lancet into said cocked orientation.

23. A single use lancet as recited in claim 18 wherein said shoulder element comprises a biased finger extending from said lancet generally towards said piercing tip of said lancet, and said restrictor panel comprises a protruding element disposed in said housing.

24. A single use lancet as recited in claim 23 wherein said protruding element includes a sloped configuration which downwardly slopes away from said piercing tip of said lancet so as to facilitate passage thereof past said biased finger upon said lancet moving in a first direction towards said access opening.

25. A single use lancet as recited in claim 18 further comprising at least one guide ridge protruding from said body of said lancet, and at least one corresponding guide track structured to movably receive said guide ridge therein and extending at least partially along a length of said open interior of said housing so as to guide substantially linear movement of said lancet within said housing.