US5704899A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Protective sheath for a fiberoptic image guide within an articulated endoscope
Assignee: Bayer Healthcare LLC
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Filing: 1995-10-10
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Granted: 1998-01-06
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Expires: 2015-10-10
Abstract
Abstract An improved endoscope prevents abrasion of a fiberoptic image guide with a braid reinforced sheath. Abrasion of fiberoptic image guides within articulating endoscopes quickly wear through a conventional fiberoptic mantle, decreasing the useful life of the endoscope. Preferably, the sheath comprises a metal braid disposed within a polyimide, which effectively protects the image guide from abrasion against the endoscope components and substantially extends useful life.
Inventors
- 👤 Charles Milo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:59
CPC Classifications
A; A61; A61B; A61B1/00; A61B1/005; A61B1/0051; A61B1/0055; A61B1/0056; B; B29; B29C; B29C48/00; B29C48/03; B29C48/05
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
121 words
An improved endoscope of the type having an articulating tip including an outer tube containing a pulling wire and a fiberoptic image guide, wherein the pulling wire is affixed to the distal end of the outer tube so that a proximal displacement of the pulling wire relative to the outer tube flexes the articulating tip, the improvement comprising: an inner sheath disposed over the image guide within the outer tube of the articulating tip, at least an axial portion of the inner sheath and image guide being radially unrestrained within the outer tube, the inner sheath comprising a polymer material and a reinforcing braid to protect the image guide from abrasion, the reinforcing braid comprising a metal or high strength fiber.
Claim 2
Dependent Claim
121 words
An improved endoscope of the type having an articulating tip including an outer tube containing a pulling wire and a fiberoptic image guide, wherein the pulling wire is affixed to the distal end of the outer tube so that a proximal displacement of the pulling wire relative to the outer tube flexes the articulating tip, the improvement comprising: an inner sheath disposed over the image guide within the outer tube of the articulating tip, at least an axial portion of the inner sheath and image guide being radially unrestrained within the outer tube, the inner sheath comprising a polymer material and a reinforcing braid to protect the image guide from abrasion, the reinforcing braid comprising a metal or high strength fiber.
Claim 3
Dependent Claim
18 words
An improved endoscope as claimed in claim 1, wherein the reinforcing braid is disposed within the polymer material.
Claim 4
Dependent Claim
18 words
An improved endoscope as claimed in claim 2, wherein the polymer material is coextruded with the reinforcing braid.
Claim 5
Dependent Claim
21 words
An improved endoscope as claimed in claim 1, wherein the polymer material comprises a polyamide or a high strength thermoplastic elastomer.
Claim 6
Dependent Claim
27 words
An improved endoscope as claimed in claim 1, wherein the inner sheath is formed by dip-coating an inner polymer layer and braid with an outer polymer layer.
Claim 7
Dependent Claim
15 words
An improved endoscope as claimed in claim 1, wherein the reinforcing braid comprises a metal.
Claim 8
Dependent Claim
60 words
An improved endoscope as claimed in claim 1, wherein the outer tube defines a lumen having an axis, and wherein the image guide and the inner sheath within the articulating tip are axially flexible so as to deflect laterally within the lumen of the outer tube to allow the articulating tip to flex when the pulling wire is displaced proximally.
Claim 9
Dependent Claim
180 words
An endoscope comprising: an articulating tip having a proximal end and a distal end, the articulating tip comprising an outer tube defining a lumen, the outer tube including a plurality of metallic rings and an elastomeric material; a pulling wire disposed within the articulating tip and affixed to the distal end; a fiberoptic image guide disposed within the lumen of the articulating tip and having a distal lens affixed to the distal end, at least an axial portion of the image guide radially unrestrained within the lumen; and an inner sheath disposed over the image guide within the lumen of the articulating tip, the inner sheath comprising a metallic reinforcing braid disposed within a polymer; wherein proximally displacing the pulling wire relative to the proximal end of the articulating tip flexes the articulating tip and reorients the lens, the inner sheath deflecting laterally within the lumen with the image guide during flexing of the articulating tip so that the inner sheath prevents contact damage to the image guide from contacting against at least the outer tube and the pulling wire.
Claim 10
Dependent Claim
180 words
An endoscope comprising: an articulating tip having a proximal end and a distal end, the articulating tip comprising an outer tube defining a lumen, the outer tube including a plurality of metallic rings and an elastomeric material; a pulling wire disposed within the articulating tip and affixed to the distal end; a fiberoptic image guide disposed within the lumen of the articulating tip and having a distal lens affixed to the distal end, at least an axial portion of the image guide radially unrestrained within the lumen; and an inner sheath disposed over the image guide within the lumen of the articulating tip, the inner sheath comprising a metallic reinforcing braid disposed within a polymer; wherein proximally displacing the pulling wire relative to the proximal end of the articulating tip flexes the articulating tip and reorients the lens, the inner sheath deflecting laterally within the lumen with the image guide during flexing of the articulating tip so that the inner sheath prevents contact damage to the image guide from contacting against at least the outer tube and the pulling wire.
Claim 11
Dependent Claim
44 words
An endoscope as claimed in claim 8, wherein the outer tube defines an axis, and wherein the image guide and the inner sheath within the articulating tip are axially flexible to allow the articulating tip to flex when the pulling wire is displaced proximally.
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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) | 2001-01-05 | 2001-07-07 | 2002-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-01-05 | 2005-07-07 | 2006-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-01-05 | 2009-07-07 | 2010-01-06 | $7700.00 | Window Closed / Lapsed |