US5336191A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surgical needle assembly
Assignee: DLP Inc
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Filing: 1992-08-13
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Granted: 1994-08-09
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Expires: 2012-08-13
Abstract
Abstract A surgical needle with a stylet selectively received within the lumen of a cannula is shown where establishing and maintaining a desired angular orientation between the stylet and cannula is achieved. The orientation may be determined in one of several ways. Preferably, a projection is mounted to the cannula hub which is selectively received in a recess of the stylet cap when the stylet and cannula are in the desired orientation. Alternatively, a pair of flexible arms may be mounted to the stylet cap wherein detents on the distal ends of the flexible arms are selectively received within complementary depressions on the cannula hub when the stylet and cannula are in the desired orientation. Also, a longitudinal rib on the stylet cap and a projection on the cannula hub can be visually inspected or can be felt by the user to determine the orientation. Finally, a projection from the cannula hub may be selectively received within a slot on the stylet cap to ensure proper alignment of the stylet and cannula.
Inventors
- 👤 Richard E. Davis
- 👤 William J. Greenhoe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:58
CPC Classifications
A; A61; A61B; A61B10/00; A61B10/02; A61B10/0233; A61B10/0283; A61B17/00; A61B17/34; A61B17/3401; A61B2017/347
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
235 words
In a surgical needle including a cannula member and a stylet member, the cannula member comprising a cannula handle and a cannula having a proximal end affixed to the cannula handle and a distal end opposite the cannula handle, the stylet member comprising a stylet handle and a stylet having a proximal end affixed to the stylet handle and a distal end opposite the stylet handle, the stylet being removably receivable within the lumen of the cannula, the axial dimensions of the stylet and the cannula being so related that when the stylet is fully received within the cannula with the handles adjacent to each other the respective distal ends are coterminous, the distal ends being respectively contoured to form a predetermined needle tip configuration when the stylet is fully received in the lumen of the cannula in predetermined angular relation therewith, the improvement wherein: one of the handles includes a receivable projection formed on an exterior surface; and the other of the handles comprises a hollow body having a locking recess formed on an interior surface thereof, said other handle receiving at least a portion of said one handle within the hollow body when the stylet is fully received in the cannula, the receivable projection and locking recess being so formed and situated that the receivable projection is snap-locked in the locking recess when the cannula and stylet are in said predetermined angular relation.
Claim 2
Dependent Claim
235 words
In a surgical needle including a cannula member and a stylet member, the cannula member comprising a cannula handle and a cannula having a proximal end affixed to the cannula handle and a distal end opposite the cannula handle, the stylet member comprising a stylet handle and a stylet having a proximal end affixed to the stylet handle and a distal end opposite the stylet handle, the stylet being removably receivable within the lumen of the cannula, the axial dimensions of the stylet and the cannula being so related that when the stylet is fully received within the cannula with the handles adjacent to each other the respective distal ends are coterminous, the distal ends being respectively contoured to form a predetermined needle tip configuration when the stylet is fully received in the lumen of the cannula in predetermined angular relation therewith, the improvement wherein: one of the handles includes a receivable projection formed on an exterior surface; and the other of the handles comprises a hollow body having a locking recess formed on an interior surface thereof, said other handle receiving at least a portion of said one handle within the hollow body when the stylet is fully received in the cannula, the receivable projection and locking recess being so formed and situated that the receivable projection is snap-locked in the locking recess when the cannula and stylet are in said predetermined angular relation.
Claim 3
Dependent Claim
55 words
A surgical needle according to claim 1 further comprising at least one guide projection mounted on one of the handles and a longitudinal rib mounted on the other of said handles wherein the at least one guide projection and longitudinal rib are aligned when the stylet and the cannula are in said predetermined angular relation.
Claim 4
Dependent Claim
39 words
A surgical needle according to claim 2 further comprising a slot in one of said handles whereby said at least one projection is received in said slot when the stylet and the cannula are in said predetermined angular relation.
Claim 5
Dependent Claim
26 words
A surgical needle according to claim 1 further comprising a reservoir in said cannula handle which is in fluid communication with said lumen of the cannula.
Claim 6
Dependent Claim
41 words
A surgical needle according to claim 4 further comprising a syringe mounting attached to one end of the cannula handle and an aperture extending through the mounting wherein said aperture is in fluid communication with said reservoir of the cannula handle.
Claim 7
Dependent Claim
73 words
A surgical needle according to claim 1 wherein said contoured distal end of the cannula is angled at an acute angle with respect to the longitudinal axis of the cannula and said contoured distal end of said stylet is angled such that it lies on the same plane as the contoured end of the cannula when the styler is fully received in the lumen of the cannula in said predetermined angular relation therewith.
Claim 8
Dependent Claim
22 words
A surgical needle according to claim 1 wherein said other handle is deformable to selectively disengage the receivable projection from the recess.
Claim 9
Dependent Claim
27 words
A surgical needle according to claim 1 wherein the one of the handles is the stylet handle and the other of the handles is the cannula handle.
Claim 10
Dependent Claim
22 words
A surgical needle according to claim 1 wherein the locking recess comprises a depression formed in the interior surface said other handle.
Claim 11
Dependent Claim
66 words
A surgical needle according to claim 1 further comprising a second receivable projection provided on one of the handles and a sliding recess mounted on the other of the handles, the sliding recess being complementary in shape to the second receivable projection and the second receivable projection being slidably received in the sliding recess when the stylet and the cannula are in said predetermined angular relation.
Claim 12
Dependent Claim
27 words
A surgical needle according to claim 10 wherein the receivable projection second depends from the stylet handle and the recess sliding is formed in the cannula handle.
Claim 13
Dependent Claim
65 words
A surgical needle according to claim 11 wherein the stylet and cannula handles are adapted such that the stylet handle must be deformed by squeezing its hollow body in order to selectively engage or disengage the receivable projection from the locking recess, thereby mounting the stylet and cannula in the predetermined angular relation or removing the stylet from the predetermined angular relation with the cannula.
References Cited (Backward Citations)
US2426535A
Cited
US3175554A
Cited
US3515137A
Cited
US3628524A
Cited
US3630192A
Cited
US4256119A
Cited
US4266555A
Cited
US4340066A
Cited
US4396021A
Cited
US4403617A
Cited
US4445893A
Cited
US4609370A
Cited
US4655226A
Cited
US4667684A
Cited
US4758218A
Cited
US4838282A
Cited
US4799495A
Cited
US4844087A
Cited
US4881551A
Cited
US4846804A
Cited
US5005585A
Cited
US4967762A
Cited
US5031634A
Cited
US5026355A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-08-08 | 1998-02-07 | 1998-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-08-08 | 2002-02-07 | 2002-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-08-08 | 2006-02-07 | 2006-08-09 | $7700.00 | Window Closed / Lapsed |