US5820609A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Medical hollow needle and a method of producing thereof
Assignee: SAITO MEDICAL INDUSTRIES Inc
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Filing: 1996-04-18
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Granted: 1998-10-13
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Expires: 2016-04-18
Abstract
Abstract A medical hollow needle has a cylindrical member 2. At the top edge portion 10 of the cylindrical member 2, an open bevel edge face 11 is provided, open in an oblique direction with respect to the extending direction of the cylindrical member 2. A sub bevel face 12 formed in an oblique direction with respect to the extending direction of the cylindrical member 2 is provided with the top edge portion 10 of the cylindrical member 2 at the position opposed to the open bevel edge face 11. A sharp edge portion 13 is formed between the open bevel edge face 11 and the sub bevel face 12.
Inventors
- 👤 Yoshikuni Saito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:16
CPC Classifications
B; B24; B24B; B24B19/00; B24B19/16; A; A61; A61M; A61M5/00; A61M5/178; A61M5/31; A61M5/32; A61M5/3286
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
281 words
A medical hollow needle comprising: a cylindrical member having a flow path capable of passing a fluid therein in its center axis direction, having a cylindrical outer peripheral face on an outer peripheral side; a first bevel grinding face formed at a top end portion of said cylindrical member, such that said flow path is open in an oblique direction, having a first inclined angle with respect to said center axis; said first bevel grinding face located such that a grinding boundary on a side opposite to a direction of said top end of said cylindrical member of said first bevel grinding face is connected with said cylindrical outer peripheral face; a second bevel grinding face formed by rotating a first rotational angle in a positive direction with respect to said first bevel grinding face with said center axis as its center, having a second inclined angle with respect to said center axis, and a third bevel grinding face formed by rotating a second rotational angle in an opposite direction with respect to said first bevel grinding face with said center axis as its center, having a third inclined angle with respect to said center axis, both formed at said top edge portion of said cylindrical member respectively; a fourth bevel grinding face grinded and formed at a position opposed to said first bevel grinding face of said top edge portion of said cylindrical member in an oblique direction with respect to said center axis direction of said cylindrical member, thinning wall thickness of said cylindrical member; and a sharp edge portion comprised of at least three grinding faces, that is, said second, said third and said fourth bevel grinding faces.
Claim 2
Dependent Claim
281 words
A medical hollow needle comprising: a cylindrical member having a flow path capable of passing a fluid therein in its center axis direction, having a cylindrical outer peripheral face on an outer peripheral side; a first bevel grinding face formed at a top end portion of said cylindrical member, such that said flow path is open in an oblique direction, having a first inclined angle with respect to said center axis; said first bevel grinding face located such that a grinding boundary on a side opposite to a direction of said top end of said cylindrical member of said first bevel grinding face is connected with said cylindrical outer peripheral face; a second bevel grinding face formed by rotating a first rotational angle in a positive direction with respect to said first bevel grinding face with said center axis as its center, having a second inclined angle with respect to said center axis, and a third bevel grinding face formed by rotating a second rotational angle in an opposite direction with respect to said first bevel grinding face with said center axis as its center, having a third inclined angle with respect to said center axis, both formed at said top edge portion of said cylindrical member respectively; a fourth bevel grinding face grinded and formed at a position opposed to said first bevel grinding face of said top edge portion of said cylindrical member in an oblique direction with respect to said center axis direction of said cylindrical member, thinning wall thickness of said cylindrical member; and a sharp edge portion comprised of at least three grinding faces, that is, said second, said third and said fourth bevel grinding faces.
Claim 3
Dependent Claim
35 words
The medical hollow needle as set forth in claim 1, wherein said sharp edge portion is comprised of four grinding faces, that is, said first, said second, said third and said fourth bevel grinding faces.
Claim 4
Dependent Claim
31 words
The medical hollow needle as set forth in claim 1, wherein said fourth bevel grinding face is a part of a tapered grinding face with said center axis as its center.
Claim 5
Dependent Claim
23 words
The medical hollow needle as set forth in claim 1, wherein said fourth bevel grinding face is in the shape of a plane.
Claim 6
Dependent Claim
36 words
The medical hollow needle as set forth in claim 4, wherein said fourth bevel grinding face extends from said sharp edge portion side to a side opposite to said top end direction of said cylindrical member.
Claim 7
Dependent Claim
111 words
The medical hollow needle as set forth in claim 5, wherein said fourth bevel grinding face is provided such that the positions corresponding to an apical portion of a cylindrical outer peripheral face side of said cylindrical member of a first intersectional portion formed by crossing said first bevel grinding face and said second bevel grinding face and an apical portion of a cylindrical outer peripheral face side of said cylindrical member of a second intersectional portion formed by crossing said first bevel grinding face and said third bevel grinding face, are crossed-over by said,fourth bevel grinding face in an opposite direction of said top end direction of said cylindrical member.
Claim 8
Dependent Claim
72 words
The medical hollow needle as set forth in claim 5, wherein said fourth bevel grinding face is provided such that a position corresponding to said apical portion of the opposite side to said top end direction of said cylindrical member in said grinding boundary of said first bevel grinding face is crossed over by said fourth bevel grinding face in a direction opposite to said top end direction of said cylindrical member.
Claim 9
Dependent Claim
62 words
The medical hollow needle as set forth in claim 4, wherein said fourth bevel grinding face is provided such that a cylindrical outer peripheral face of said cylindrical member exists between said fourth bevel grinding face and said second bevel grinding face and between said fourth bevel grinding face and third bevel grinding face in a peripheral direction of said cylindrical member.
Claim 10
Dependent Claim
30 words
The medical hollow needle as set fourth in claim 1, wherein said sharp edge portion is formed positioning on an inner wall forming said flow path of said cylindrical member.
Claim 11
Dependent Claim
35 words
The medical hollow needle as set forth in claim 1, wherein said fourth bevel grinding face is formed at an inclined angle 2-15 degrees with respect to said center axis direction of said cylindrical member.
Claim 12
Dependent Claim
23 words
The medical hollow needle as set forth in claim 1, wherein said second and said third inclined angles are equal to each other.
Claim 13
Dependent Claim
23 words
The medical hollow needle as set forth in claim 1, wherein said first and said second rotational angles are equal to each other.
Claim 14
Dependent Claim
104 words
The medical hollow needle as set forth in claim 1, wherein a fifth bevel grinding face is provided at an apical portion of a cylindrical outer peripheral face side of said cylindrical member in a first intersectional portion formed by crossing said first bevel grinding face and said second bevel grinding face, by removing said apical portion, and a sixth bevel grinding face is provided at an apical portion of a cylindrical outer peripheral face side of said cylindrical member in a second intersectional portion formed by crossing said first bevel grinding face and said third bevel grinding face, by removing said apical portion.
Claim 15
Dependent Claim
62 words
The medical hollow needle as set forth in claim 5, wherein said fourth bevel grinding face is provided such that a cylindrical outer peripheral face of said cylindrical member exists between said fourth bevel grinding face and said second bevel grinding face and between said fourth bevel grinding face and third bevel grinding face in a peripheral direction of said cylindrical member.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-10-12 | 2002-04-13 | 2002-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-10-12 | 2006-04-13 | 2006-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-10-12 | 2010-04-13 | 2010-10-13 | $7700.00 | Window Closed / Lapsed |