Patent US6454744B1 successfully refreshed from Google Patents.
US6454744B1
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US
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Peelable PTFE sheaths and methods for manufacture of same
Assignee: Teleflex Medical LLC
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Filing: 1999-12-23
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Granted: 2002-09-24
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Expires: 2019-12-23
Abstract
Abstract The present invention provides improved medical introducer devices which incorporate a single or multi-layer PTFE peelable sheath. Devices of the present invention are suitable for use in inserting an ancilliary medical device, e.g., a catheter, guide wire and the like, into a patient. Methods of the present invention also are disclosed which employ a precision sintering process in order to produce sheaths having excellent tear properties and optimal peelability.
Inventors
- 👤 Peter Dwight Spohn
- 👤 Dean David Dinsmore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:53
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/32; B32B27/322; A; A61; A61M; A61M25/00; A61M25/01; A61M25/06; A61M25/0662; A61M25/0668; B29; B29C; B29C48/00; B29C48/022; B32B1/00; B32B1/08; B32B27/06; B32B27/08; B32B7/00; B32B7/04; B32B7/06; B29C48/03; B29C48/06; B29K; B29K2027/00; B29K2027/12; B29K2027/18; B32B2327/00; B32B2327/12; B32B2327/18; B32B2535/00
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
84 words
A medical introducer device comprising: (a) a multi-layer, peelable PTFE sheath having a bore extending therethrough, and that does not include mechanically produced skiving for longitudinal splitting of the sheath, the sheath thermally cured to provide a peel strength of at least about 0.5 lbs with a standard deviation of no greater than about 0.40; and (b) a hub unit attached at a proximal end of the peelable sheath which facilitates splitting of the peelable sheath upon application of an effective shearing force thereon.
Claim 2
Dependent Claim
84 words
A medical introducer device comprising: (a) a multi-layer, peelable PTFE sheath having a bore extending therethrough, and that does not include mechanically produced skiving for longitudinal splitting of the sheath, the sheath thermally cured to provide a peel strength of at least about 0.5 lbs with a standard deviation of no greater than about 0.40; and (b) a hub unit attached at a proximal end of the peelable sheath which facilitates splitting of the peelable sheath upon application of an effective shearing force thereon.
Claim 3
Dependent Claim
17 words
The device of claim 1 wherein the sheath has a peel strength of at least about 0.70.
Claim 4
Dependent Claim
17 words
The device of claim 1 wherein the sheath has a peel strength of at least about 1.0.
Claim 5
Dependent Claim
20 words
The device of claim 1 wherein the sheath has a peel strength standard deviation of no more than about 0.30.
Claim 6
Dependent Claim
20 words
The device of claim 1 wherein the sheath has a peel strength standard deviation of no more than about 0.20.
Claim 7
Dependent Claim
25 words
The device of claim 1 further comprising a plurality of wing portions attached to the hub unit on opposing sides for grasping the hub unit.
Claim 8
Dependent Claim
21 words
The device of claim 1 further comprising a needle or dilator assembly extending longitudinally within the bore of the peelable sheath.
Claim 9
Dependent Claim
22 words
The device of claim 1 wherein the multi-layer, peelable sheath comprises a thermally stable outer layer and at least one inner layer.
Claim 10
Dependent Claim
17 words
The device of claim 8 wherein the inner layer comprises a detectable material capable of external visualization.
Claim 11
Dependent Claim
18 words
The device of claim 8 wherein the thermally stable outer layer of the peelable sheath comprises a pigment.
Claim 12
Dependent Claim
21 words
The device of claim 10 wherein the outer layer and inner layer of the peelable sheath each comprise visibly distinct pigments.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2005-09-23 | 2006-03-25 | 2006-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2009-09-23 | 2010-03-25 | 2010-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2013-09-23 | 2014-03-25 | 2014-09-24 | $7700.00 | Window Closed / Lapsed |