Patent US4396024A successfully refreshed from Google Patents.
US4396024A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for the extraction of capillary blood
Assignee: Individual
•
Filing: 1979-11-02
•
Granted: 1983-08-02
•
Expires: 1999-11-02
Abstract
Abstract In a device for the extraction of capillary blood including a capillary open at both ends and being of a predetermined volume, having a capillary effect at least at the front end thereof, a holder is integrally connected to said capillary which is provided with one or more windows. For avoiding dosage errors, a closure pin for the rear end of the capillary or in a modification a rear transverse wall having one or more air exit apertures is provided.
Inventors
- 👤 Walter Sarstedt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:23
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/02; A61B5/021; A61B5/02108; A61B5/02125; A61B5/15; A61B5/150007; A61B5/150015; A61B5/150022; A61B5/150206; A61B5/150213; A61B5/150305; A61B5/150343
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
129 words
A device for the extraction of capillary blood comprising: a capillary portion having front and rear ends; a capillary passage extending between said front and rear ends; a first opening a said front ends for the introduction of blood into said capillary passage by capillary action; a second opening at said rear end for venting said capillary passage; a holder at said rear end for supporting said capillary portion and having an outer surface; a closure pin axially movable within said holder between a first position in which said pin restricts the size of said second opening and a second position in which said pin does not restrict the size of said second opening; and window means in said holder communicating between said second opening and said outer surface.
Claim 2
Independent Claim
129 words
A device for the extraction of capillary blood comprising: a capillary portion having front and rear ends; a capillary passage extending between said front and rear ends; a first opening a said front ends for the introduction of blood into said capillary passage by capillary action; a second opening at said rear end for venting said capillary passage; a holder at said rear end for supporting said capillary portion and having an outer surface; a closure pin axially movable within said holder between a first position in which said pin restricts the size of said second opening and a second position in which said pin does not restrict the size of said second opening; and window means in said holder communicating between said second opening and said outer surface.
Claim 3
Dependent Claim
21 words
A device as set forth in claim 1, wherein said capillary passage flares from said front end to said rear end.
Claim 4
Independent Claim
144 words
A device for the extraction of capillary blood comprising: a capillary portion having front and rear ends; a capillary passage extending between said front and rear ends; an opening at said front end for the introduction of blood by capillary action into said capillary passage; a holder at said rear end for supporting said capillary portion and having an outer surface; a closure pin having an end face; an opening into said capillary passage at said rear end wherein said closure pin face and said rear end opening cooperate to define an air exit aperture smaller in area than said capillary passage; window means in said holder communicating between said air exit aperture and said outer surface; and a guide and retaining rod integrally connected with said closure pin, said guide and retaining rod being displacable in an axial direction relative to said holder.
Claim 5
Independent Claim
144 words
A device for the extraction of capillary blood comprising: a capillary portion having front and rear ends; a capillary passage extending between said front and rear ends; an opening at said front end for the introduction of blood by capillary action into said capillary passage; a holder at said rear end for supporting said capillary portion and having an outer surface; a closure pin having an end face; an opening into said capillary passage at said rear end wherein said closure pin face and said rear end opening cooperate to define an air exit aperture smaller in area than said capillary passage; window means in said holder communicating between said air exit aperture and said outer surface; and a guide and retaining rod integrally connected with said closure pin, said guide and retaining rod being displacable in an axial direction relative to said holder.
Claim 6
Dependent Claim
36 words
A device as set forth in claim 3, further comprising: means for clampingly locating said rod in said holder with said closure pin end face contacting said capillary portion rear end at said rear end opening.
Claim 7
Dependent Claim
22 words
A device as set forth in claim 4, wherein said retaining rod for said closure pin is formed as an extended handle.
Claim 8
Dependent Claim
33 words
A device as set forth in claim 4, wherein said means for clampingly locating said rod in said holder comprises at least three guide vanes projecting radially from the axis of said rod.
Claim 9
Dependent Claim
19 words
A device as set forth in claim 3, wherein closure pin has a centering projection at said end face.
Claim 10
Dependent Claim
14 words
A device as set forth in claim 7, wherein said centering projection is part-spherical.
Claim 11
Dependent Claim
35 words
A device as set forth in claim 8, wherein said part spherical centering projection has a periphery including recesses formed therein, said recesses cooperating with said rear end opening to define said air exit apertures.
Claim 12
Dependent Claim
22 words
A device as set forth in claim 7, wherein said centering projection is of pyramidal form defining a number of roof edges.
Claim 13
Dependent Claim
27 words
A device as set forth in claim 10, wherein said roof edges include abutment noses having abutment surfaces, said abutment surfaces radially projecting from said closure pin.
Claim 14
Dependent Claim
19 words
A device as set forth in claim 3, wherein said closure pin has a depression in said end face.
References Cited (Backward Citations)
GB189722025A
Cited
US2237213A
Cited
US2667075A
Cited
US2737812A
Cited
US2685800A
Cited
US3141336A
Cited
US3203251A
Cited
US3604267A
Cited
US3632119A
Cited
US3603156A
Cited
US3676076A
Cited
US3739821A
Cited
US3741732A
Cited
US3952599A
Cited
US3901085A
Cited
US3864979A
Cited
US4003262A
Cited
US4024857A
Cited
US4124044A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-08-01 | 1987-01-31 | 1987-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-01 | 1991-01-31 | 1991-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-01 | 1995-01-31 | 1995-08-02 | $7700.00 | Window Closed / Lapsed |