Patent US5050585A successfully refreshed from Google Patents.
US5050585A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sheathed endoscope
Assignee: Pentax Corp
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Filing: 1990-07-13
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Granted: 1991-09-24
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Expires: 2010-07-13
Abstract
Abstract A sheathed endoscope having a flexible insert tube in the form of an elongated cylinder and a distal end portion with a viewing window which is coupled to the distal end of the insert tube. The endoscope includes: a flexible guide tube inserted in the insert tube so as to extend over the entire length of the insert tube with, one end of the guide tube opening to the outside at the distal end portion and the other end of the guide tube opening to the outside at the proximal end of the insert tube. A sheath which is transparent at least partially thereof which is positioned over the surface of the viewing window and the sheath is removably fitted over the insert tube to isolate the insert tube from the external environment. At least one channel tube inserted in the sheath so as to extend over the entire length of the sheath, one end of the channel tube opening to the outside at the distal end portion of the sheath, and the other end of the channel tube being inserted into the guide tube from the distal end thereof and drawn out of the proximal end of the guide tube.
Inventors
- 👤 Nagashige Takahashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:55
CPC Classifications
A; A61; A61B; A61B1/00; A61B1/00064; A61B1/00071; A61B1/00073; A61B1/00142; A61B1/012; A61B1/015; A61B1/12
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
227 words
A sheathed endoscope having a flexible insert tube in the form of an elongated cylinder having proximal and distal ends, and a distal end portion with a viewing window which is coupled to the distal end of said insert tube, said endoscope comprising: a flexible guide tube inserted in said insert tube so as to extend over the entire length of said insert tube, one end of said guide tube opening to the outside at said distal end portion, and the other end of said guide tube opening to the outside at the proximal end of said insert tube; a sheath which is transparent at least a portion thereof which is adapted to be positioned over the surface of said viewing window, said sheath adapted to be positioned over the surface of said viewing window, said sheath adapted to be removably fitted over said insert tube to isolate said insert tube from the external environment; and at least one channel tube inserted in said sheath so as to extend through the entire length of said sheath, one end of said channel tube opening to the outside at the distal end portion of said sheath, and the other end of said channel tube being inserted into said guide tube at the distal end of said guide tube and drawn out of the proximal end of said guide tube.
Claim 2
Dependent Claim
227 words
A sheathed endoscope having a flexible insert tube in the form of an elongated cylinder having proximal and distal ends, and a distal end portion with a viewing window which is coupled to the distal end of said insert tube, said endoscope comprising: a flexible guide tube inserted in said insert tube so as to extend over the entire length of said insert tube, one end of said guide tube opening to the outside at said distal end portion, and the other end of said guide tube opening to the outside at the proximal end of said insert tube; a sheath which is transparent at least a portion thereof which is adapted to be positioned over the surface of said viewing window, said sheath adapted to be positioned over the surface of said viewing window, said sheath adapted to be removably fitted over said insert tube to isolate said insert tube from the external environment; and at least one channel tube inserted in said sheath so as to extend through the entire length of said sheath, one end of said channel tube opening to the outside at the distal end portion of said sheath, and the other end of said channel tube being inserted into said guide tube at the distal end of said guide tube and drawn out of the proximal end of said guide tube.
Claim 3
Dependent Claim
62 words
A sheathed endoscope according to claim 1, wherein said sheath has a tubular portion formed in the shape of a thin-walled cylinder of an elastic material and a support member of a transparent material of such a size that said distal end portion of said insert tube is loosely fitted therein, said tubular portion and said support member being watertightly connected together.
Claim 4
Dependent Claim
48 words
A sheathed endoscope according to claim 2, wherein said tubular portion has a diameter slightly smaller than the outer diameter of said insert tube, said tubular portion being capable of being rolled up into an annular configuration so that it can be removably fitted over said insert tube.
Claim 5
Dependent Claim
54 words
A sheathed endoscope according to claim 2, wherein said tubular portion has a diameter slightly smaller than the outer diameter of said insert tube, said tubular portion being expanded and slipped on or off said insert tube when the area around said tubular portion is decompressed or pressurized air is supplied into said sheath.
Claim 6
Dependent Claim
23 words
A sheathed endoscope according to claim 1, wherein said channel tube includes a biopsy channel for inserting a forceps or other similar means.
Claim 7
Dependent Claim
28 words
A sheathed endoscope according to claim 5, wherein said biopsy channel is connected to the distal end of said sheath so as to open to the outside thereat.
Claim 8
Dependent Claim
28 words
A sheathed endoscope according to claim 1, wherein said channel tube includes a channel for supplying at least air or water to the distal end of said sheath.
Claim 9
Dependent Claim
35 words
A sheathed endoscope according to claim 7, wherein the distal end of said sheath is provided with a nozzle which opens toward the outer surface of said transparent portion, said channel communicating with said nozzle.
Claim 10
Dependent Claim
75 words
A sheathed endoscope according to claim 1, wherein an end portion of a conduit for passing a fluid is disposed near the proximal end portion of said channel tube drawn out of said guide tube and connecting means is provided for detachably connecting together the end portion of said conduit and the proximal end portion of said channel tube in such a manner that said conduit and said channel tube are communication with each other.
Claim 11
Dependent Claim
22 words
A sheathed endoscope according to claim 9, wherein said connecting means is an adapter which is detachable with respect to said endoscope.
Claim 12
Dependent Claim
124 words
A sheathed endoscope having a flexible insert tube comprising: a flexible guide tube inserted in said insert tube so as to extend over the entire length of said insert tube; the distal end of said guide tube opening to the outside of the distal end portion of said insert tube, and the proximal end of said guide tube opening to the outside at a control part of said endoscope; and at least one channel tube, one end of said channel tube opening to the outside at the distal end portion of said guide tube, and the other end of said channel tube being inserted into said guide tube from the distal end thereof and drawn out of the promixal end of said guide tube.
Claim 13
Dependent Claim
124 words
A sheathed endoscope having a flexible insert tube comprising: a flexible guide tube inserted in said insert tube so as to extend over the entire length of said insert tube; the distal end of said guide tube opening to the outside of the distal end portion of said insert tube, and the proximal end of said guide tube opening to the outside at a control part of said endoscope; and at least one channel tube, one end of said channel tube opening to the outside at the distal end portion of said guide tube, and the other end of said channel tube being inserted into said guide tube from the distal end thereof and drawn out of the promixal end of said guide tube.
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) | 1994-09-23 | 1995-03-25 | 1995-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-09-23 | 1999-03-25 | 1999-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-09-23 | 2003-03-25 | 2003-09-24 | $7700.00 | Window Closed / Lapsed |