US4771766A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Guide tube assembly of endoscope
Assignee: Machida Endoscope Co Ltd
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Filing: 1987-06-19
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Granted: 1988-09-20
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Expires: 2007-06-19
Abstract
Abstract An endoscope comprising a proximal structure and an inserting structure extending from an operating body of the proximal structure. A guide tube assembly extending within the inserting structure comprises an inner tube formed of porous resin and an outer tube formed of imperforate resin. The inner tube has one end communicating with a proximal opening provided in the proximal structure and the other end communicating with a distal opening provided in a distal end of the inserting structure. A hollow portion of the inner tube communicates with an annular region between the inner and outer tubes through pores of a peripheral wall of the inner tube. The annular region communicates with a port provided in at least one of the proximal structure and the distal end of the inserting structure. Fluid such as, for example, disinfecting fluid can be supplied from the port or can be discharged from the port, and can flow between the hollow portion of the inner tube and the annular region between the inner and outer tubes through the pores.
Inventors
- 👤 Hisatake Aoshiro
- 👤 Mitsuru Sato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:23
CPC Classifications
A; A61; A61B; A61B1/00; A61B1/12; A61B1/121
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
163 words
An endosope comprising: a proximal structure including at least an operating body and provided with at least one proximal opening; an elongated inserting structure extending from said operating body and having a distal end provided with at least one distal opening; a guide tube assembly extending through said inserting structure and comprising an inner tube formed of porous resin and having one end thereof communicating with said proximal opening and the other end communicating with said distal opening and an outer tube formed of imperforate resin and surrounding said inner tube, said inner tube having a hollow portion communicating with an annular region between said inner and outer tubes through pores of a peripheral wall of said inner tube; and port means provided in at least one of said proximal structure and said distal end of said inserting structure, a fluid being capable of passing through said port means, said port means communicating with said annular region between said inner and outer tubes.
Claim 2
Dependent Claim
163 words
An endosope comprising: a proximal structure including at least an operating body and provided with at least one proximal opening; an elongated inserting structure extending from said operating body and having a distal end provided with at least one distal opening; a guide tube assembly extending through said inserting structure and comprising an inner tube formed of porous resin and having one end thereof communicating with said proximal opening and the other end communicating with said distal opening and an outer tube formed of imperforate resin and surrounding said inner tube, said inner tube having a hollow portion communicating with an annular region between said inner and outer tubes through pores of a peripheral wall of said inner tube; and port means provided in at least one of said proximal structure and said distal end of said inserting structure, a fluid being capable of passing through said port means, said port means communicating with said annular region between said inner and outer tubes.
Claim 3
Dependent Claim
13 words
An endoscope as defined in claim 1, wherein said porous resin is polytetrafluoroethylene.
Claim 4
Dependent Claim
53 words
An endosope as defined in claim 1, comprising flow passageway means including the hollow portion of said inner tube and an annular space formed between said inner and outer tubes, the hollow portion of said inner tube communicating with said annular space through the pores of the peripheral wall of said inner tube.
Claim 5
Dependent Claim
17 words
An endoscope as defined in claim 3, wherein said proximal opening is provided in said operating body.
Claim 6
Dependent Claim
17 words
An endoscope as defined in claim 3, wherein said port means is provided in said operating body.
Claim 7
Dependent Claim
21 words
An endoscope as defined in claim 3, wherein said port means is provided in said distal end of said inserting structure.
Claim 8
Dependent Claim
33 words
An endoscope as defined in claim 3, wherein said port means comprises a first port provided in said operating body and a second port provided in said distal end of said inserting structure.
Claim 9
Dependent Claim
43 words
An endoscope as defined in claim 3, wherein said proximal structure includes a connector connected to said operating body, said proximal opening being provided in said connector, and tube means for connecting said proximal opening to the hollow portion of said inner tube.
Claim 10
Dependent Claim
17 words
An endoscope as defined in claim 8, wherein said port means is provided in said operating body.
Claim 11
Dependent Claim
45 words
An endoscope as defined in claim 3, wherein said proximal structure includes a connector connected to said operating body, said port means being provided in said connector, and tube means for connecting said port means to said annular space between said inner and outer tubes.
Claim 12
Dependent Claim
32 words
An endoscope as defined in claim 10, wherein said port means comprises a first port provided in said connector and a second port provided in said distal end of said inserting structure.
Claim 13
Dependent Claim
36 words
An endoscope as defined in claim 11, wherein said distal end of said inserting structure is provided with a viewing window and a nozzle directed toward said viewing window, said nozzle serving as said second port.
Claim 14
Dependent Claim
69 words
An endoscope as defined in claim 3, wherein said flow passageway means has one end communicating with said port means and the other end communicating with at least one of said proximal and distal openings, said fluid including a disinfecting fluid and being supplied from said port means, caused to flow through said flow passageway means and discharged from said at least one of said proximal and distal openings.
Claim 15
Dependent Claim
80 words
An endoscope as defined in claim 3, including means associated with one of said proximal and distal openings for closing the same, said flow passageway means having one end communicating with the other of said proximal and distal openings and the other end communicating with said port means, said fluid including a disinfecting fluid and being supplied from said other of said proximal and distal openings, caused to flow through said flow passageway means and discharged from said port means.
Claim 16
Dependent Claim
124 words
An endoscope as defined in claim 3, wherein said port means comprises a first port provided in said proximal structure and a second port provided in said distal end of said inserting structure, and wherein said endoscope includes means associated with one of said proximal and distal openings for closing the same, said fluid passageway means having one end thereof communicating with the other of said proximal and distal openings and the other end communicating with at least one of said first and second ports, said fluid including a disinfecting fluid and being supplied from said other of said proximal and distal openings, caused to flow through said flow passageway means and discharged from said at least one of said first and second ports.
Claim 17
Dependent Claim
123 words
An endoscope as defined in claim 3, wherein said port means comprises a first port provided in said proximal structure and a second port provided in said distal end of said inserting structure, and wherein said endoscope includes means associated with one of said first and second ports for closing the same, said fluid passageway means having one end thereof communicating with the other of said first and second ports and the other end communicating with at least one of said proximal and distal openings, said fluid including a disinfecting fluid and being supplied from said other of said first and second ports, caused to flow through said flow passageway means and discharged from at least one of said proximal and distal openings.
Claim 18
Dependent Claim
53 words
An endoscope as defined in claim 1, including: first attaching means removably associated with said proximal opening for attaching said one end of said inner tube to said proximal opening; and second attaching means removably associated with said distal opening for attaching said other end of said inner tube to said distal opening.
Claim 19
Dependent Claim
37 words
An endoscope as defined in claim 17, wherein said one end of said inner tube is connected to said first attaching means, and said other end of said inner tube is connected to said second attaching means.
Claim 20
Dependent Claim
68 words
An endoscope as defined in claim 17, wherein said one end of said inner tube is connected to said first attaching means, and said second attaching means is separable from said other end of said inner tube, said second attaching means cooperating with said distal opening to clamp said other end of said inner tube between a wall surface of said distal opening and said second attaching means.
Claim 21
Dependent Claim
30 words
An endoscope as defined in claim 17, wherein said first attaching means is fitted in said proximal opening, and said second attaching means is threadedly engaged with said distal opening.
Claim 22
Dependent Claim
49 words
An endoscope as defined in claim 17, wherein said first attaching means has a through bore communicating with one of the hollow portion of said inner tube, and said second attaching means has a through bore communicating with the other end of said hollow portion of said inner tube.
Claim 23
Dependent Claim
13 words
An endoscope as defined in claim 1, wherein said outer tube is corrugated.
Claim 24
Dependent Claim
60 words
An endoscope as defined in claim 1, wherein said outer tube is formed of thin wall rubber and is in intimate contact with an outer peripheral surface of said inner tube, said outer tube being capable of being inflated when said fluid is supplied to said annular region between said inner and outer tubes, to form an annular space therebetween.
Claim 25
Dependent Claim
21 words
An endoscope as defined in claim 1, wherein said inner and outer tubes are maintained out of contact with each other.
References Cited (Backward Citations)
US3960143A
Cited
US4111204A
Cited
US4111204B1
Cited
US4261343A
Cited
US4333480A
Cited
US4589403A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-09-20 | 1992-03-21 | 1992-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-20 | 1996-03-21 | 1996-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-20 | 2000-03-21 | 2000-09-20 | $7700.00 | Window Closed / Lapsed |