US5873887A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blood sampling device
Assignee: Bayer Corp
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Filing: 1996-10-25
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Granted: 1999-02-23
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Expires: 2016-10-25
Abstract
Abstract An automatic blood sampling device is provided with a housing (12, 14, 18, 20), a reciprocable shaft (50) disposed in the housing (12, 14, 18, 20), and a lancet (40) operatively coupled to the shaft (50). The lancet (40) is movable between a retracted position in which the lancet (40) is disposed within the housing (12, 14, 18, 20) and an extended position in which the lancet (40) extends outside of the housing (12, 14, 18, 20). The blood sampling device includes means for retaining the lancet (40) in its retracted position, means (51) for causing the lancet (40) to automatically move from its retracted position to its extended position, and means for generating a reduced internal pressure within an area in the housing (12, 14, 18, 20) as the lancet (40) moves from its retracted position to its extended position to facilitate drawing blood from a skin puncture to be made by the lancet (40) into an interior portion of the housing (12, 14, 18, 20), the internal pressure being less than the ambient pressure outside of the housing (12, 14, 18, 20) of the sampling device.
Inventors
- 👤 Toby King
- 👤 Anne Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:48
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/15; A61B5/151; A61B5/15186; A61B5/15188; A61B5/15192; A61B5/15194; A61B5/150007; A61B5/150015; A61B5/150022; A61B5/150053; A61B5/150061; A61B5/150099; A61B5/150175; A61B5/150183; A61B5/150206; A61B5/150221; A61B5/150374; A61B5/150381; A61B5/150412; A61B5/150801; A61B5/150809; A61B5/150824; A61B5/15101; A61B5/15103; A61B5/15107; A61B5/15113; A61B5/15115; A61B5/15117; A61B5/15126; A61B5/1513
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
339 words
A blood sampling device, comprising: a housing (12, 14, 18, 20); a shaft (50) disposed in said housing (12, 14, 18, 20); a lancet (40) operatively coupled to said shaft (50), said lancet (40) being movable between a retracted position in which said lancet (40) is disposed within said housing (12, 14, 18, 20) and an extended position in which said lancet (40) extends outside of said housing (12, 14, 18, 20); means (50, 52, 60, 64) for retaining said lancet (40) in said retracted position; means (51) for causing said lancet (40) to automatically move from said retracted position to said extended position; and means for generating a reduced internal pressure within an area in said housing (12, 14, 18, 20) as said lancet (40) moves from said retracted position to said extended position to facilitate drawing blood from a skin puncture to be made by said lancet (40) into an interior portion of said housing (12, 14, 18, 20), said internal pressure being less than an ambient pressure outside of said housing (12, 14, 18, 20), said means for generating a reduced internal pressure comprising: a suction chamber (88) disposed in said housing (12, 14, 18, 20), said suction chamber (88) having a diameter and a substantially air-tight end; an acceleration chamber (92) disposed in said housing (12, 14, 18, 20) and being disposed generally coaxially with said suction chamber (88), said acceleration chamber (92) having a diameter larger than said diameter of said suction chamber (88); and a plunger (46) connected to said shaft (50), said plunger (46) having an exterior portion (94) which makes sealing contact with said suction chamber (88) so that said reduced internal pressure is formed within said suction chamber (88) when said plunger (46) is moved in a direction away from said substantially air-tight end of said suction chamber (88), said exterior portion (94) of said plunger (46) having a diameter smaller than said diameter of said acceleration chamber (92) to facilitate acceleration of said shaft (50) towards said extended position.
Claim 2
Dependent Claim
339 words
A blood sampling device, comprising: a housing (12, 14, 18, 20); a shaft (50) disposed in said housing (12, 14, 18, 20); a lancet (40) operatively coupled to said shaft (50), said lancet (40) being movable between a retracted position in which said lancet (40) is disposed within said housing (12, 14, 18, 20) and an extended position in which said lancet (40) extends outside of said housing (12, 14, 18, 20); means (50, 52, 60, 64) for retaining said lancet (40) in said retracted position; means (51) for causing said lancet (40) to automatically move from said retracted position to said extended position; and means for generating a reduced internal pressure within an area in said housing (12, 14, 18, 20) as said lancet (40) moves from said retracted position to said extended position to facilitate drawing blood from a skin puncture to be made by said lancet (40) into an interior portion of said housing (12, 14, 18, 20), said internal pressure being less than an ambient pressure outside of said housing (12, 14, 18, 20), said means for generating a reduced internal pressure comprising: a suction chamber (88) disposed in said housing (12, 14, 18, 20), said suction chamber (88) having a diameter and a substantially air-tight end; an acceleration chamber (92) disposed in said housing (12, 14, 18, 20) and being disposed generally coaxially with said suction chamber (88), said acceleration chamber (92) having a diameter larger than said diameter of said suction chamber (88); and a plunger (46) connected to said shaft (50), said plunger (46) having an exterior portion (94) which makes sealing contact with said suction chamber (88) so that said reduced internal pressure is formed within said suction chamber (88) when said plunger (46) is moved in a direction away from said substantially air-tight end of said suction chamber (88), said exterior portion (94) of said plunger (46) having a diameter smaller than said diameter of said acceleration chamber (92) to facilitate acceleration of said shaft (50) towards said extended position.
Claim 3
Dependent Claim
28 words
A device as defined in claim 1 wherein said means (50, 52, 60, 64) for retaining said lancet (40) in said retracted position comprises a latch mechanism (52).
Claim 4
Dependent Claim
30 words
A device as defined in claim 1 wherein said means for causing said lancet (40) to automatically move from said retracted position to said extended position comprises a spring (51).
Claim 5
Dependent Claim
24 words
A device as defined in claim 1 additionally comprising means (80) for venting said reduced internal pressure area to increase said reduced internal pressure.
Claim 6
Dependent Claim
25 words
A device as defined in claim 1 additionally comprising means (70) for decelerating said lancet (40) as said lancet (40) moves towards said extended position.
Claim 7
Dependent Claim
42 words
A device as defined in claim 1 additionally comprising a check valve (26) in fluid communication with said acceleration chamber (92) to allow air to pass from said acceleration chamber (92) to a point outside of said housing (12, 14, 18, 20).
Claim 8
Dependent Claim
178 words
A blood sampling device, comprising: a housing (12, 14, 18, 20); a shaft (50) disposed in said housing (12, 14, 18, 20); a lancet (40) operatively coupled to said shaft (50), said lancet (40) being movable between a retracted position in which said lancet (40) is disposed within said housing (12, 14, 18, 20) and an extended position in which said lancet (40) extends outside of said housing (12, 14, 18, 20); means (50, 52, 60, 64) for retaining said lancet (40) in said retracted position; means (51) for causing said lancet (40) to automatically move from said retracted position to said extended position; and means for generating a reduced internal pressure within an area in said housing (12, 14, 18, 20) as said lancet (40) moves from said retracted position to said extended position to facilitate drawing blood from a skin puncture to be made by said lancet (40) into an interior portion of said housing (12, 14, 18, 20), said internal pressure being less than an ambient pressure outside of said housing (12, 14, 18, 20).
Claim 9
Dependent Claim
178 words
A blood sampling device, comprising: a housing (12, 14, 18, 20); a shaft (50) disposed in said housing (12, 14, 18, 20); a lancet (40) operatively coupled to said shaft (50), said lancet (40) being movable between a retracted position in which said lancet (40) is disposed within said housing (12, 14, 18, 20) and an extended position in which said lancet (40) extends outside of said housing (12, 14, 18, 20); means (50, 52, 60, 64) for retaining said lancet (40) in said retracted position; means (51) for causing said lancet (40) to automatically move from said retracted position to said extended position; and means for generating a reduced internal pressure within an area in said housing (12, 14, 18, 20) as said lancet (40) moves from said retracted position to said extended position to facilitate drawing blood from a skin puncture to be made by said lancet (40) into an interior portion of said housing (12, 14, 18, 20), said internal pressure being less than an ambient pressure outside of said housing (12, 14, 18, 20).
Claim 10
Dependent Claim
39 words
A device as defined in claim 7 wherein said housing (12, 14, 18, 20) comprises a first housing portion, a second housing portion connected to said first housing portion, and an end cap connected to said second housing portion.
Claim 11
Dependent Claim
25 words
A device as defined in claim 7 wherein said means (50,52,60,64) for retaining said lancet (40) in said retracted position comprises a latch mechanism (52).
Claim 12
Dependent Claim
31 words
A device as defined in claim 7 wherein said means (51) for causing said lancet (40) to automatically move from said retracted position to said extended position comprises a spring (51).
Claim 13
Dependent Claim
24 words
A device as defined in claim 7 additionally comprising means (80) for venting said reduced internal pressure area to increase said reduced internal pressure.
Claim 14
Dependent Claim
25 words
A device as defined in claim 7 additionally comprising means (70) for decelerating said lancet (40) as said lancet (40) moves towards said extended position.
Claim 15
Dependent Claim
42 words
A device as defined in claim 7 additionally comprising a check valve (26) in fluid communication with an acceleration chamber (92) to allow air to pass from said acceleration chamber (92) to a point outside of said housing (12, 14, 18, 20).
Claim 16
Dependent Claim
259 words
A blood sampling device, comprising: a housing (12, 14, 18, 20); a shaft (50) disposed in said housing (12, 14, 18, 20); a lancet (40) operatively coupled to said shaft (50), said lancet (40) being movable between a retracted position in which said lancet (40) is disposed within said housing (12, 14, 18, 20) and an extended position in which said lancet (40) extends outside of said housing (12, 14, 18, 20); means (50, 52, 60, 64) for retaining said lancet (40) in said retracted position; means (51) for causing said lancet (40) to automatically move from said retracted position to said extended position; and means for generating a reduced internal pressure within an area in said housing (12, 14, 18, 20) as said lancet (40) moves from said retracted position to said extended position to facilitate drawing blood from a skin puncture to be made by said lancet (40) into an interior portion of said housing (12, 14, 18, 20), said internal pressure being less than an ambient pressure outside of said housing (12, 14, 18, 20), said means for generating a reduced internal pressure comprising: a bore (88) disposed in said housing (12, 14, 18, 20) and having a substantially air-tight end; and a plunger (46) connected to said shaft (50), said plunger (46) having an exterior portion (94) which makes sealing contact with said bore (88) so that said reduced internal pressure is formed within said bore (88) when said plunger (46) is moved in a direction away from said air-tight end of said bore (88).
Claim 17
Dependent Claim
259 words
A blood sampling device, comprising: a housing (12, 14, 18, 20); a shaft (50) disposed in said housing (12, 14, 18, 20); a lancet (40) operatively coupled to said shaft (50), said lancet (40) being movable between a retracted position in which said lancet (40) is disposed within said housing (12, 14, 18, 20) and an extended position in which said lancet (40) extends outside of said housing (12, 14, 18, 20); means (50, 52, 60, 64) for retaining said lancet (40) in said retracted position; means (51) for causing said lancet (40) to automatically move from said retracted position to said extended position; and means for generating a reduced internal pressure within an area in said housing (12, 14, 18, 20) as said lancet (40) moves from said retracted position to said extended position to facilitate drawing blood from a skin puncture to be made by said lancet (40) into an interior portion of said housing (12, 14, 18, 20), said internal pressure being less than an ambient pressure outside of said housing (12, 14, 18, 20), said means for generating a reduced internal pressure comprising: a bore (88) disposed in said housing (12, 14, 18, 20) and having a substantially air-tight end; and a plunger (46) connected to said shaft (50), said plunger (46) having an exterior portion (94) which makes sealing contact with said bore (88) so that said reduced internal pressure is formed within said bore (88) when said plunger (46) is moved in a direction away from said air-tight end of said bore (88).
Claim 18
Dependent Claim
39 words
A device as defined in claim 14 wherein said housing (12, 14, 18, 20) comprises a first housing portion, a second housing portion connected to said first housing portion, and an end cap connected to said second housing portion.
Claim 19
Dependent Claim
28 words
A device as defined in claim 14 wherein said means (50, 52, 60, 64) for retaining said lancet (40) in said retracted position comprises a latch mechanism (52).
Claim 20
Dependent Claim
31 words
A device as defined in claim 14 wherein said means (51) for causing said lancet (40) to automatically move from said retracted position to said extended position comprises a spring (51).
Claim 21
Dependent Claim
24 words
A device as defined in claim 14 additionally comprising means (80) for venting said reduced internal pressure area to increase said reduced internal pressure.
Claim 22
Dependent Claim
25 words
A device as defined in claim 14 additionally comprising means (70) for decelerating said lancet (40) as said lancet (40) moves towards said extended position.
Claim 23
Dependent Claim
42 words
A device as defined in claim 14 additionally comprising a check valve (26) in fluid communication with said acceleration chamber (92) to allow air to pass from said acceleration chamber (92) to a point outside of said housing (12, 14, 18, 20).
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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) | 2002-02-22 | 2002-08-24 | 2003-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-02-22 | 2006-08-24 | 2007-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-02-22 | 2010-08-24 | 2011-02-23 | $7700.00 | Window Closed / Lapsed |