US5423760A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic retractable safety penetrating instrument
Assignee: Individual
•
Filing: 1994-06-15
•
Granted: 1995-06-13
•
Expires: 2014-06-15
Abstract
Abstract A retractable safety penetrating instrument includes a cannula, a penetrating member disposed within the cannula and a hub mounting proximal ends of the penetrating member and the cannula. The penetrating member is movable to an operative state to penetrate tissue wherein a sharp tip of the penetrating member extends beyond a distal end of the cannula, and is arranged to be moved to a retracted position with the sharp tip of the penetrating member disposed within the cannula in a safe, protected position upon penetrating through the tissue. The penetrating member is selectively movable to various extended positions following retraction such that the sharp tip of the penetrating member can be positioned in an anatomical cavity to perform various medical procedures. The cannula can include various distensible, expandable or shape changing devices automatically positioned in response to retraction of the penetrating member to stabilize or hold the instrument within an anatomical cavity. A method of performing surgical procedures includes the steps of automatically retracting a sharp tip of the penetrating member within a cannula, moving the penetrating member distally to cause the sharp tip to protrude beyond a distal end of the cannula and performing a procedural step with the penetrating member.
Inventors
- 👤 Inbae Yoon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:37
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/34; A61B17/3494; A61B17/3496; A61B17/3417; A61B17/3415; A61B17/3474; A61B2017/00477; A61B2017/3454; A61B2017/3458; A61B2017/348; A61B2017/3482; A61B2017/3484; A61B90/00; A61B90/08; A61B2090/0801; A61B2090/08021; A61B2090/0807; A61B2090/0811
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
124 words
A retractable safety penetrating instrument for penetration into an anatomical cavity comprising a cannula having a distal end, a proximal end and a lumen extending between said cannula distal and proximal ends; a hollow needle having a sharp distal end for penetrating tissue and being slidably disposed in said cannula; means for automatically retracting said needle from an extended position wherein said sharp distal end protrudes beyond said cannula distal end to a retracted position wherein said sharp distal end is disposed within said cannula in response to penetration into the anatomical cavity with said needle; and a safety probe slidably disposed in said needle, said safety probe being biased to extend beyond said cannula distal end with said needle in said retracted position.
Claim 2
Dependent Claim
124 words
A retractable safety penetrating instrument for penetration into an anatomical cavity comprising a cannula having a distal end, a proximal end and a lumen extending between said cannula distal and proximal ends; a hollow needle having a sharp distal end for penetrating tissue and being slidably disposed in said cannula; means for automatically retracting said needle from an extended position wherein said sharp distal end protrudes beyond said cannula distal end to a retracted position wherein said sharp distal end is disposed within said cannula in response to penetration into the anatomical cavity with said needle; and a safety probe slidably disposed in said needle, said safety probe being biased to extend beyond said cannula distal end with said needle in said retracted position.
Claim 3
Dependent Claim
36 words
An automatic retractable safety penetrating instrument as recited in claim 1 wherein said safety probe extends beyond said cannula a distance corresponding to a space to be formed with the safety probe in the anatomical cavity.
Claim 4
Dependent Claim
130 words
A retractable safety penetrating instrument for penetration into an anatomical cavity comprising a cannula having a distal end, a proximal end and a lumen extending between said cannula distal and proximal ends; a hollow needle having a sharp distal end for penetrating tissue and a proximal end, said needle being slidably disposed in said cannula; a hub mounting said proximal end of said needle; means for retracting said needle relative to said hub from an extended position wherein said sharp distal end protrudes beyond said cannula distal end to a retracted position wherein said sharp distal end is disposed within said cannula; and a safety probe slidably disposed in said needle, said safety probe being biased to extend beyond said cannula distal end with said needle in said retracted position.
Claim 5
Dependent Claim
130 words
A retractable safety penetrating instrument for penetration into an anatomical cavity comprising a cannula having a distal end, a proximal end and a lumen extending between said cannula distal and proximal ends; a hollow needle having a sharp distal end for penetrating tissue and a proximal end, said needle being slidably disposed in said cannula; a hub mounting said proximal end of said needle; means for retracting said needle relative to said hub from an extended position wherein said sharp distal end protrudes beyond said cannula distal end to a retracted position wherein said sharp distal end is disposed within said cannula; and a safety probe slidably disposed in said needle, said safety probe being biased to extend beyond said cannula distal end with said needle in said retracted position.
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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) | 1998-06-12 | 1998-12-12 | 1999-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-06-12 | 2002-12-12 | 2003-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-06-12 | 2006-12-12 | 2007-06-13 | $7700.00 | Window Closed / Lapsed |