US3929123A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Muscle biopsy needle
Assignee: Individual
•
Filing: 1974-01-09
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Granted: 1975-12-30
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Expires: 1994-01-09
Abstract
Abstract Means for obtaining muscle tissue specimens from a body and comprising a generally cylindrical shaft having a tapered and pointed distal puncturing and cutting tip, and with coaxially disposed sheath means having a sharpened forward cutting edge slidably enveloping the shaft. A sample receiving cavity is formed in the shaft and is provided with a generally sharpened hook in the forward portion of the cavity. The hook has a point directed toward the proximate end of the shaft and comprises an overhanging barb forming a portion of the sample retaining cavity. The sheath is slidable over the shaft between retracted and extended dispositions, with the forward edges of the sheath enclosing the barb when the sheath is in its forward predetermined disposition, and with the sharpened tip of the barb being exposed when the sheath is in retracted disposition. The forward sharpened cutting edge of the sheath forms a cutting edge which separates that portion of the sample retained within the sample receiving cavity from the bulk of the tissue, with the separation being in the form of a clean extraction cut. For removal of the sample, simple retraction of the device is possible.
Inventors
- 👤 Khosrow Jamshidi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 16:16
CPC Classifications
A; A61; A61B; A61B10/00; A61B10/02; A61B10/0233; A61B10/0266; A61B10/0275; A61B17/00; A61B17/32; A61B2017/320064
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
267 words
Biopsy means for obtaining muscle tissue specimens from a body and comprising: a. blade means comprising a generally cylindrical shaft and having a shank portion with an inwardly tapered pointed distal puncturing and cutting tip; b. hollow tubular sheath means slidably enveloping said blade means with free axial and arcuate rotational motion of said sheath means relative to said cylindrical shaft and providing a hollow blade receiving sleeve with the circumferential distal tip end of said sheath terminating along a plane normal to the tubular axis and being tapered inwardly at the distal tip end in continuation with the taper formed on said blade and forming an extension of said pointed puncturing and cutting tip; c. a sample receiving slot formed in said blade means and forming a sample retaining cavity in said blade at a point spaced from the distal tip thereof and disposed adjacent the surface of said shaft along said shank portion and adjacent said tapered zone; d. said sheath being slidable over said blade between retracted and extended dispositions, with the forward edges of said sheath enclosing said sample receiving slot when said blade is in said retracted disposition and with the said sample receiving cavity being exposed when said blade is in said extended disposition; and e. detent means being formed along said cylindrical shaft, and a mating plunger member is provided along the axial length of said sheath means, the arrangement being such that when said distal tip end of said sheath reaches the proximate end of the taper formed on said blade, said plunger is received within said detent means.
Claim 2
Dependent Claim
267 words
Biopsy means for obtaining muscle tissue specimens from a body and comprising: a. blade means comprising a generally cylindrical shaft and having a shank portion with an inwardly tapered pointed distal puncturing and cutting tip; b. hollow tubular sheath means slidably enveloping said blade means with free axial and arcuate rotational motion of said sheath means relative to said cylindrical shaft and providing a hollow blade receiving sleeve with the circumferential distal tip end of said sheath terminating along a plane normal to the tubular axis and being tapered inwardly at the distal tip end in continuation with the taper formed on said blade and forming an extension of said pointed puncturing and cutting tip; c. a sample receiving slot formed in said blade means and forming a sample retaining cavity in said blade at a point spaced from the distal tip thereof and disposed adjacent the surface of said shaft along said shank portion and adjacent said tapered zone; d. said sheath being slidable over said blade between retracted and extended dispositions, with the forward edges of said sheath enclosing said sample receiving slot when said blade is in said retracted disposition and with the said sample receiving cavity being exposed when said blade is in said extended disposition; and e. detent means being formed along said cylindrical shaft, and a mating plunger member is provided along the axial length of said sheath means, the arrangement being such that when said distal tip end of said sheath reaches the proximate end of the taper formed on said blade, said plunger is received within said detent means.
Claim 3
Dependent Claim
92 words
The biopsy means as defined in claim 1 being particularly characterized in that said sample receiving slot is arranged obliquely to the central axis of said shaft to form a generally sharpened hook in said blade means at a point spaced from the distal tip thereof, said hook having a point directed toward the proximate end of said blade and comprising an overhanging barb forming an upper wall of a sample retaining cavity within said blade means, the edge portions of said overhanging barb being sharpened to present a cutting edge. Pg,14
Claim 4
Dependent Claim
27 words
The biopsy means as defined in claim 1 being particularly characterized in that sample engaging hook means are provided within the confines of said sample receiving slot.
Claim 5
Dependent Claim
137 words
The biopsy means as defined in claim 1 being particularly characterized in that a bore is formed within said cylindrical shaft, and a sample engaging hook means is provided in combination with said biopsy means, said sample engaging hook means being slidably received axially within said bore and with the hook means being disposed within said slot when said hook means is advanced into said slot, with said hook means including a shaft having a gripping handle at one end thereof and a sample engaging hook at the other end thereof, with said shaft having a length greater than the axial distance from the forward end of said sample receiving slot to the proximal end of said cylindrical shaft so as to be sufficient to carry said hook means into the confines of said sample retaining cavity.
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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) | 1978-12-29 | 1979-06-30 | 1979-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-29 | 1983-06-30 | 1983-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-29 | 1987-06-30 | 1987-12-30 | $7700.00 | Window Closed / Lapsed |