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US5350392A Expired / Lapsed US ⏱️ 0.0 years remaining

Lancing device with automatic cocking

Assignee: Bayer Corp
•
Filing: 1994-02-03
•
Granted: 1994-09-27
•
Expires: 2014-02-03
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Abstract

Abstract The present invention is a lancing device with an automatic cocking feature. The automatically cocking lancing device utilizes a firing burton loaded with a firing button spring and a drive spring connecting the firing button to a plunger. As the user presses the firing burton and compresses the firing burton spring, the user also moves the plunger until the plunger engages a latching mechanism. The latching mechanism holds the plunger in a latched position, and, as the user continues pressing the firing button, the user compresses the drive spring connected to the plunger. Before firing, the drive spring is compressed enough such that the biasing force of the drive spring is sufficient to cause the plunger to strike and drive a lancet into the user's finger. At that point, the pressing of the firing button causes the lancing device to fife. The plunger unlatches and drives the lancet into the user's finger under the biasing force of the drive spring. At firing, the firing burton spring is compressed, and, once the user releases the firing button, the firing button spring returns the plunger and the firing button to the cocked position under the biasing force of the firing burton spring.

Inventors

  • 👤 D. Glenn Purcell
  • 👤 Robert C. Whitson

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-22 23:09
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/15; A61B5/151; A61B5/15186; A61B5/150007; A61B5/150015; A61B5/150022; A61B5/150374; A61B5/150381; A61B5/150412; A61B5/150534; A61B5/150541; A61B5/150549; A61B5/150694; A61B5/150717; A61B5/15101; A61B5/15103; A61B5/15107; A61B5/15111; A61B5/15115; A61B5/15117; A61B5/15188; A61B5/15192; A61B5/15194

Claims Analysis

Total Claims: 7
Claim 1
Independent Claim 81 words
An automatically cocking lancing device, comprising: a casing having a firing button opening and a plunger opening; a firing button movably positioned in said casing through said firing button opening; a plunger movably positioned within said casing; a firing button spring engaging said firing button and said casing; a drive spring engaging said firing button and said plunger; and a latch mechanism adjacent to said plunger for engaging said plunger, said firing button engaging said latch mechanism to disengage said plunger.
Claim 2
Dependent Claim 81 words
An automatically cocking lancing device, comprising: a casing having a firing button opening and a plunger opening; a firing button movably positioned in said casing through said firing button opening; a plunger movably positioned within said casing; a firing button spring engaging said firing button and said casing; a drive spring engaging said firing button and said plunger; and a latch mechanism adjacent to said plunger for engaging said plunger, said firing button engaging said latch mechanism to disengage said plunger.
Claim 3
Dependent Claim 33 words
The automatically cocking lancing device of claim 1 wherein said firing button includes a latching mechanism release sleeve, said latching mechanism release sleeve being aligned to disengage said plunger from said latching mechanism.
Claim 4
Dependent Claim 26 words
The automatically cocking lancing device of claim 2 wherein said firing button includes a firing button sleeve, said firing button sleeve retaining said firing button spring.
Claim 5
Dependent Claim 33 words
The automatically cocking lancing device of claim 1 further comprising a plunger stem extending from said plunger, said drive spring positioned about said plunger stem for guiding said drive spring and said plunger.
Claim 6
Dependent Claim 47 words
The automatically cocking lancing device of claim 1 wherein said latching mechanism includes latch arms connected to said casing, said latch arms extending from said casing, each of said latch arms terminating in a latch that engages a latch ledge of said plunger to latch the plunger.
Claim 7
Dependent Claim 52 words
The automatically cocking lancing device of claim 5 wherein said latching mechanism includes a latch trigger on each of said latch arms, said latch triggers spreading apart said latch arms upon being engaged by said firing button to disengage said latches from said latch ledge of said plunger and unlatching said plunger.

References Cited (Backward Citations)

US4203446A Cited
US4527561A Cited
US4677979A Cited
US4637403A Cited
US4653513A Cited
US5029583A Cited
US4895147A Cited
US4990154A Cited
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USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1997-09-26 1998-03-28 1998-09-27 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 2001-09-26 2002-03-28 2002-09-27 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2005-09-26 2006-03-28 2006-09-27 $7700.00 Window Closed / Lapsed

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