Patent US5242418A successfully refreshed from Google Patents.
US5242418A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Protective means for a needle or similar cannula medical device
Assignee: Individual
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Filing: 1992-05-22
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Granted: 1993-09-07
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Expires: 2012-05-22
Abstract
Abstract A protective sheath for a cannula which has distal end for percutaneous insertion and a proximate end having a hub or like assembly. The protective sheath comprises an elongated, flexible tubular member which slidably fits over the cannula. The tubular member has a distal end which is disposed over the distal end of the cannula and is compressibly retractable therefrom. The distal end of the tubular member has an opening through which the cannula may pass so as to expose the distal end of the cannula during insertion thereof, but when the cannula is withdrawn, the distal end of the sheath extends over and covers the distal end of the cannula.
Inventors
- 👤 James D. Weinstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:07
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/178; A61M5/31; A61M5/32; A61M5/3205; A61M5/321; A61M5/3243; A61M5/3275; A61M5/3245; A61M2005/3247; A61M2005/3249; A61M2005/325; A61M5/326; A61M2005/3267
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
98 words
A protective sheath for a cannula having a distal end for percutaneous insertion, said protective sheath comprising an elongated, flexible tubular member for slidably fitting over said cannula, said tubular member having a distal end arcuately depending over the distal end of said cannula and compressibly retractable therefrom and a proximate end, said distal end having an opening through which the cannula may pass whereby the distal end of the cannula is exposed during insertion thereof, and the distal end of the sheath extends over and covers the distal end of the cannula when the cannula is withdrawn.
Claim 2
Dependent Claim
98 words
A protective sheath for a cannula having a distal end for percutaneous insertion, said protective sheath comprising an elongated, flexible tubular member for slidably fitting over said cannula, said tubular member having a distal end arcuately depending over the distal end of said cannula and compressibly retractable therefrom and a proximate end, said distal end having an opening through which the cannula may pass whereby the distal end of the cannula is exposed during insertion thereof, and the distal end of the sheath extends over and covers the distal end of the cannula when the cannula is withdrawn.
Claim 3
Dependent Claim
38 words
A protective sheath as set forth in claim 1 wherein said arcuate distal end of said tubular member includes a slit adjacent the distal end of said cannula such that said end opens off axis of said cannula.
Claim 4
Dependent Claim
35 words
A protective sheath as set forth in claim 1 wherein said arcuate distal end comprises a tip member depending over said distal end of said cannula and includes a slit to permit opening off axis.
Claim 5
Dependent Claim
45 words
A protective sheath as set forth in claim 1, 2, or 3 wherein said tubular member includes at least one pair of elongated, spaced apart slits which define at least two foldable strips, said slots being located away from said distal end of said sheath.
Claim 6
Dependent Claim
22 words
A protective sheath as set forth in claim 1 wherein said distal end of said tubular member includes a plurality of protrusions.
Claim 7
Dependent Claim
25 words
A protective sheath as set forth in claim 1 or 5 in which said distal end of said sheath includes a plurality of openings therein.
Claim 8
Dependent Claim
31 words
A protective sheath as set forth in claim 3 wherein said tubular member is formed in the shape of a bellow at its proximate end to enhance decompression of said sheath.
Claim 9
Dependent Claim
24 words
A protective sheath as set forth in claim 3 including a spring member positioned between said cannula and tubular member at its proximate end.
Claim 10
Dependent Claim
16 words
A protective sheath as claimed claim 1 or 2 wherein said tubular member comprises a spring.
Claim 11
Dependent Claim
15 words
A protective sheath as claimed in claim 9 wherein said spring is a compression spring.
Claim 12
Dependent Claim
31 words
A protective sheath as claimed in claim 1 or 2 wherein said tubular member comprises a first compression spring and a second torsion spring comprising the distal end of said sheath.
Claim 13
Dependent Claim
19 words
A protective sheath as set forth in claim 1, 2 or 3, 4 wherein said tubular member is molded.
References Cited (Backward Citations)
US4139009A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-09-06 | 1997-03-08 | 1997-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-09-06 | 2001-03-08 | 2001-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-09-06 | 2005-03-08 | 2005-09-07 | $7700.00 | Window Closed / Lapsed |