Single unit lancet device

• US 5,395,388 A
• Filed: 11/15/1993
• Issued: 03/07/1995
• Est. Priority Date: 11/15/1993
• Status: Expired due to Term

• Current Assignee: Stat Medical Devices Incorporated
• Original Assignee: Steven Schraga
• Inventors: Schraga, Steven
• Primary Examiner(s): Lewis, Ralph A.
• Application Number:
  US08/151,862
• Time in Patent Office: 477 Days
• Field of Search: 606/181-185, 606/188, 604/136, 604/156, 604/157
• US Class Current: 606/182
• 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 5/150511 Details of construction of shaft
• CPC Class Codes: A61B 5/150519 Details of construction of hub, i.e. element used to attach the single-ended needle to a piercing device or sampling device
• 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 5/15142 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 disposable lancet device including a housing wherein a spring is contained, the spring including a first end fixed within the housing and having a movable second end zone with a pointed blade or terminal end, the second end zone being movable relative to a normal position with the pointed terminal end contained within the housing and adjacent a first opening in the housing, between a cocked position completely within the housing and with energy stored in the spring, and a piercing position with the second end zone in the first opening and the pointed terminal end momentarily exterior of the housing. The housing further including a lever arm including a holding tip to maintain the second end zone in cocked position until pivotally moved by an operator resulting in release of the second end zone such that the second end zone moves to its piercing position, and as soon as it pierces, retracts into the housing.

Claims

1. A single use disposable lancet device comprising:

a housing, said housing including a lever arm having a first end zone and a second end zone;

a holding member connected to said second end zone of said lever arm, said holding member extending within said housing,

a spring member within said housing, said spring member including a distal end, a proximal end, and a pointed lancet tip at said distal end, said proximal end being operably connected to said housing,

said housing having an opening sized to permit said pointed tip to project exterior to said housing,

said spring member being disposed within said housing in an initial pro-tensioned cocked position wherein said distal end is in releasable engagement with said holding member and said spring member is biased for movement into an unstressed position,

said housing being structured and disposed to protectively shield said pointed tip of said spring member in said cocked position,

said lever arm being pivotally connected to said housing between said first end zone and said second end zone such that actuation of said first end zone causes said holding member to disengage from said distal end of said spring member,

said spring member being pivotally movable from said initial pro-tensioned position through said unstressed position to a piercing position wherein said pointed tip momentarily projects exterior of said housing opening, said spring member rebounding from said piercing position and finally coming to rest in said unstressed position,

said housing being structured and disposed to protectively shield said pointed tip of said spring member in said final unstressed position,

said housing comprising a means for shielding said spring member from being displaced from said final unstressed position.

2. A lancet device as recited in claim 1 wherein said spring member is of elongate configuration and said pointed tip is integrally formed therewith.

3. A lancet device as recited in claim 1 wherein said lever arm is integrally formed with said housing.

4. A lancet device as recited in claim 1 wherein said first end zone of said lever arm has an outwardly raised configuration.

5. A lancet device as recited in claim 1 wherein said first end zone of said lever arm includes a frangible section connected to said housing in said initial pre-tensioned position, said frangible section being breakable upon actuation of said first end zone so as to indicate that the lancet device has been used.