Single use lancet assembly

• US 6,918,918 B1
• Filed: 04/29/2002
• Issued: 07/19/2005
• Est. Priority Date: 08/14/2001
• Status: Active Grant

• Current Assignee: Steven Schraga
• Original Assignee: Steven Schraga
• Inventors: Schraga, Steven
• Primary Examiner(s): DAVIS, DANIEL J
• Application Number:
  US10/134,996
• Time in Patent Office: 1,177 Days
• Field of Search: 606181-185, 600/136, 600/137, 604/192, 604/197, 604/198
• 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 5/150549 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 5/150916 by blocking components, e.g. piston, driving device or fluid passageway
• 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 5/1513 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 single use lancet assembly having a housing, with an open interior and a piercing aperture defined therein, a lancet, with a body and a piercing tip positioned in the open interior of the housing and movable between a cocked orientation and a piercing orientation, a driving assembly structured to move the lancet into the piercing orientation, and a single use trigger assembly structured to actuate an actuating mechanism thereby allowing the lancet to move, at least temporarily, from its cocked orientation to its piercing orientation. The single use trigger assembly is structured such that it may not be positioned to actuate the actuating mechanism more than one time, thereby preventing inadvertent or intentional re-use of a contaminated piercing tip.

Claims

1. A single use lancet assembly comprising:

a housing, said housing including an at least partially open interior and a piercing aperture 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 trigger assembly structured to position said lancet into said cocked orientation and to release said lancet from its cocked orientation; and

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

said trigger assembly further including a trigger lock structured to at least partially immobilize said trigger assembly within at least a portion of said housing after said lancet has been affirmatively released one time, thereby preventing repositioning of said trigger assembly to a pre-actuation orientation and preventing re-firing of said lancet.

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 wherein said trigger assembly is structured to at least, temporarily protrude from said housing when said lancet is disposed in said cocked orientation.

5. A single use lancet as recited in claim 1 further comprising an actuating mechanism structured to engage said lancet and abut an interior surface of said housing so as to retain said lancet in said cocked orientation until said lancet is affirmatively released.

6. A single use lancet as recited in claim 5 wherein said trigger assembly is structured to be at least partially immobilized after said lancet has been affirmatively released.

7. A single use lancet as recited in claim 1 wherein said trigger lock comprises at least one locking member connected to said trigger assembly and structured to engage said housing thereby preventing repositioning of said trigger assembly to a pre-actuation orientation after said lancet has been affirmatively released one time.

8. A single use lancet as recited in claim 1 wherein said trigger lock comprises at least one locking member connected to a cocking member of said trigger assembly and structured to engage a trigger track thereby preventing repositioning of said trigger assembly to a pre-actuation orientation after said lancet has been affirmatively released one time.

9. A single use lancet as recited in claim 1 wherein said trigger lock comprises a pair of locking members connected to a cocking member of said trigger assembly and structured to engage a trigger track thereby preventing repositioning of said trigger assembly to a pre-actuation orientation after said lancet has been affirmatively released one time.

10. A single use lancet as recited in claim 1 further comprising an actuating mechanism disposed between said lancet and said housing and structured to prevent said lancet from moving out of said cocked orientation until affirmatively released.

11. A single use lancet as recited in claim 10 wherein said actuating mechanism comprises an actuating surface and is further structured to abut an interior surface of said housing thereby preventing said lancet from moving out of said cocked orientation until affirmatively released.

12. A single use lancet as recited in claim 11 wherein said actuating mechanism comprises a biasing portion extending from said lancet.

13. A single use lancet as recited in claim 12 wherein said trigger assembly is structured to at least partially engage said actuating surface and push said actuating mechanism into said open interior of said housing thereby affirmatively releasing said lancet from said cocked orientation.

14. A single use lancet as recited in claim 10 wherein including a lock member structured to extend into said housing after actuation of said trigger assembly, said lock member structured to be engaged by said actuating mechanism so as to retain said trigger assembly in a post-actuation orientation and prevent re-firing of said lancet.

15. A single use lancet as recited in claim 14, wherein said lock member is structured to sufficiently receive said actuating mechanism so as to permit re-cocking of said lancet, said retention of said trigger assembly in said post actuation orientation preventing re-firing of said lancet.

16. 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 maintain a substantially linear movement of said lancet through said housing.

17. A single use lancet as recited in claim 16 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.

18. A single use lancet as recited in claim 16 wherein said guide assembly comprises a pair of guide ridges protruding from said body of said lancet, and a pair of corresponding guide tracks structured to movably receive said guide ridges therein and extending at least partially along a length of said open interior of said housing.

19. 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.

20. A single use lancet as recited in claim 19 wherein said protective cover is structured to protrude through said piercing aperture of said housing and is further structured to be pushed into said housing by a user so as to position said lancet into said cocked orientation.

21. A single use lancet assembly comprising:

a housing, said housing including an at least partially open interior and a piercing aperture 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 trigger assembly structured to at least position said lancet into said cocked orientation;

an actuating mechanism secured to said lancet and structured to abut an interior portion of said housing thereby retaining said lancet in said cocked orientation until affirmatively released;

said trigger assembly further structured to at least partially engage an actuating surface on said actuating mechanism and push said actuating mechanism into said open interior of said housing thereby affirmatively releasing said lancet from said cocked orientation; and

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

said trigger assembly including a trigger lock structured to at least partially immobilize said trigger assembly within at least a portion of said housing after said lancet has been affirmatively released one time thereby preventing repositioning of said trigger assembly to a pre-actuation orientation.

22. A single use lancet as recited in claim 21 wherein said trigger lock comprises at least one locking member connected to a cocking member of said trigger assembly structured to engage a trigger track thereby preventing repositioning of said trigger assembly to a pre-actuation orientation after said lancet has been affirmatively released one time.

23. A single use lancet as recited in claim 21 wherein said trigger lock comprises a pair of locking members connected to a cocking member of said trigger assembly structured to engage a trigger track thereby preventing repositioning of said trigger assembly to a pre-actuation orientation after'"'"'said lancet has been affirmatively released one time.

24. A single use lancet as recited in claim 21 wherein said trigger lock comprises a lock member structured to extend into said housing and be engaged by said actuating mechanism after said lancet has moved into said piercing orientation, said actuating mechanism structured to retain said lock member and accordingly said trigger assembly in a post actuated orientation.

25. A single use lancet as recited in claim 21 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.

26. A single use lancet as recited in claim 25 wherein said protective cover is structured to protrude from said piercing aperture of said housing and is structured to be pushed by a user so as to position said lancet into said cocked orientation.

27. A single use lancet as recited in claim 21 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.

28. A single use lancet as recited in claim 21 wherein said guide assembly comprises a pair of guide ridges protruding from said body of said lancet, and a pair of corresponding guide tracks structured to movably receive said guide ridges therein and extending at least partially along a length of said open interior of said housing.

29. A single use lancet assembly comprising:

a housing, said housing including an at least partially open interior and a piercing aperture 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 trigger assembly structured to at least position said lancet into said cocked orientation;

an actuating mechanism disposed at least partially in said housing and structured to retain said lancet in said cocked orientation until affirmatively released;

said trigger assembly further structured to engage and affirmatively release said actuating mechanism thereby affirmatively releasing said lancet from said cocked orientation;

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

a trigger lock structured to at least partially immobilize said trigger assembly in at least a portion of said housing after said lancet has been affirmatively released one time thereby preventing repositioning of said trigger assembly to a pre-actuation orientation.

30. A single use lancet as recited in claim 29 wherein said lancet is structured to be re-cocked after movement thereof into said piercing orientation, said trigger lock being structured to prevent re-actuation of said trigger assembly and a subsequent release of said lancet from said cocked orientation.

31. A single use lancet as recited in claim 29 wherein said trigger lock comprises a pair of locking members connected to a cocking member of said trigger assembly and structured to engage a trigger track thereby preventing repositioning of said trigger assembly to a pre-actuation orientation after said lancet has been affirmatively released one time.

32. A single use lancet as recited in claim 29 wherein said trigger lock comprises a bailable locking member connected to an actuating member of said trigger assembly and structured to engage an interior surface of said housing thereby preventing repositioning of said trigger assembly to a pre-actuation orientation after said lancet has been affirmatively released one time.

33. A single use lancet as recited in claim 32 wherein said trigger lock comprises a lock member structured to extend into said housing and be engaged by said actuating mechanism after said lancet has moved into said piercing orientation, said actuating mechanism structured to retain said lock member and accordingly said trigger assembly in a post actuated orientation.

34. A single use lancet as recited in claim 29 wherein said trigger lock comprises a first locking member disposed on said trigger and a second locking member disposed on an exterior surface of said housing wherein said first and second locking members are structured to operatively engage one another upon affirmatively releasing said lancet one time and at least partially immobilizing said trigger assembly thereby preventing repositioning of said trigger assembly to a pre-actuation orientation.

35. A single use lancet assembly comprising:

a housing, said housing including an at least partially open interior and a piercing aperture 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 trigger assembly structured to position said lancet into said cocked orientation and to release said lancet from its cocked orientation;

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

said trigger assembly including a lock member structured to extend into said housing after actuation of said trigger assembly, said lock member structured to be engaged by an actuating mechanism so as to retain said trigger assembly in a post-actuation orientation and prevent re-firing of said lancet.