US4873991A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Biopsy needle
Assignee: Individual
•
Filing: 1988-09-21
•
Granted: 1989-10-17
•
Expires: 2008-09-21
Abstract
Abstract A biopsy needle, for sampling tissue and the like, including a sidewall defining a hollow interior and a sharpened end. The needle has a lanced section which is formed from material of the sidewall itself and defines a rearwardly sloping, rearwardly facing blade disposed within the hollow interior of the needle. Tissue is sampled per insertion of the needle by severing the tissue with the sharpened end, passing the tissue into the hollow interior and slicing the tissue off by rotating the blade through 360 degrees. The sliced off sample is securely held by the blade as the needle is withdrawn.
Inventors
- 👤 Bruce A. J. Skinner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:30
CPC Classifications
A; A61; A61B; A61B10/00; A61B10/02; A61B10/0233; A61B10/0266; A61B17/00; A61B17/32; A61B2017/320064
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
127 words
A biopsy needle for sampling tissue and the like, said biopsy needle comprising: a sidewall of a rigid material defining a hollow interior portion; a sharpened forward end associated with said sidewall for severing the tissue; a lanced section disposed along said sidewall, said lanced section being formed from said rigid material of said sidewall itself and defining a rigid blade sloping and facing rearwardly away from said forward end and penetrating said hollow interior portion whereby upon inserting said needle into a subject, severing a tissue with said sharpened end, passing a tissue into said hollow interior and slicing off a tissue sample by rotating said blade 360 degrees, a tissue sample is securely held within said needle as said needle is withdrawn from a subject
Claim 2
Dependent Claim
127 words
A biopsy needle for sampling tissue and the like, said biopsy needle comprising: a sidewall of a rigid material defining a hollow interior portion; a sharpened forward end associated with said sidewall for severing the tissue; a lanced section disposed along said sidewall, said lanced section being formed from said rigid material of said sidewall itself and defining a rigid blade sloping and facing rearwardly away from said forward end and penetrating said hollow interior portion whereby upon inserting said needle into a subject, severing a tissue with said sharpened end, passing a tissue into said hollow interior and slicing off a tissue sample by rotating said blade 360 degrees, a tissue sample is securely held within said needle as said needle is withdrawn from a subject
Claim 3
Dependent Claim
56 words
The biopsy needle of claim 1, wherein: said lanced section is spaced a relatively short distance behind said sharpened forward end such that a majority of said needle hollow interior is devoted to retaining a tissue sample during removal from a subject while distortion of said needle in the vicinity of said sharpened end is minimized.
Claim 4
Dependent Claim
24 words
The biopsy needle of claim 2, wherein: said rearwardly sloping blade is inclined by an angle of about 30 degrees relative to said sidewall.
Claim 5
Dependent Claim
58 words
The biopsy needle of claim 3, wherein: said needle has circular cross section and said blade extends inwardly to a leading edge within said hollow interior of said needle; and said blade penetrates said hollow interior to an extend that the radial distance between said sidewall and said blade leading edge is at least 30% of the diameter.
Claim 6
Dependent Claim
30 words
The biopsy needle of claim 4, wherein: at the end opposite said sharpened forward end a fitting is operatively connected thereto for facilitating manipulation of said needle during tissue sampling.
Claim 7
Dependent Claim
18 words
The biopsy needle of claim 5, wherein: said blade has an overhead plan view resembling a truncated parabola.
Claim 8
Dependent Claim
17 words
The biopsy needle of claim 5, wherein: said blade has an overhead plan view resembling a rectangle.
Claim 9
Dependent Claim
17 words
The biopsy needle of claim 5, wherein: said blade has an overhead plan view resembling a triangle.
Claim 10
Dependent Claim
24 words
The biopsy needle of claim 1, wherein: said rearwardly sloping blade is inclined by an angle of about 30 degrees relative to said sidewall.
Claim 11
Dependent Claim
59 words
The biopsy needle of claim 1, wherein: said needle has a circular cross section and said blade extends inwardly to a leading edge within said hollow interior of said needle; and said blade penetrates said hollow interior to an extent that the radial distance between said sidewall and said blade leading edge is at least 30% of the diameter.
Claim 12
Dependent Claim
27 words
The biopsy needle of claim 1, wherein: at the end opposite said sharpened forward end a fitting is operatively connected thereto for facilitating manipulation during tissue sampling.
Claim 13
Dependent Claim
18 words
The biopsy needle of claim 1, wherein: said blade has an overhead plan view resembling a truncated parabola.
Claim 14
Dependent Claim
17 words
The biopsy needle of claim 1, wherein: said blade has an overhead plan view resembling a rectangle.
Claim 15
Dependent Claim
17 words
The biopsy needle of claim 1, wherein: said blade has an overhead plan view resembling a triangle.
References Cited (Backward Citations)
US185902A
Cited
US1162669A
Cited
US1371948A
Cited
US1585934A
Cited
US1977017A
Cited
US2198319A
Cited
US2263531A
Cited
US2843135A
Cited
US3007471A
Cited
US3577979A
Cited
US3683892A
Cited
US4209903A
Cited
US4649918A
Cited
US4600014A
Cited
US4733671A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-10-16 | 1993-04-17 | 1993-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-10-16 | 1997-04-17 | 1997-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-10-16 | 2001-04-17 | 2001-10-17 | $7700.00 | Window Closed / Lapsed |