US5257618A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Endoscope
Assignee: Fujinon Corp
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Filing: 1991-11-06
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Granted: 1993-11-02
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Expires: 2011-11-06
Abstract
Abstract An endoscope has a flexible insert portion that is inserted into an object to be inspected. A light guide, an image guide or signal cable, an instrument channel and other lengthwise members are provided therein. At least one elastic restoring body is provided in the insert portion in order to restore the lengthwise members to their original positions when straightened back after bending or curving of the insert portion.
Inventors
- 👤 Mituo Kondo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:17
CPC Classifications
G; G02; G02B; G02B23/00; G02B23/24; G02B23/26
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
151 words
An endoscope which comprises: a flexible insert portion adapted to be inserted into an object to be inspected; a plurality of lengthwise members including at least an optical fiber bundle for transmitting illuminating light to said object and a channel member which are provided within said flexible insert portion in a freely movable manner and; at least one elastic restoring body which is elastically compressible in a cross-sectional direction of said flexible insert portion in a flexible section of said flexible insert portion so as to partition said lengthwise members off from each other; wherein said elastic restoring body allows for movement of said lengthwise members in a cross-sectional plane of said flexible insert portion in arbitrary directions while keeping said lengthwise members partitioned off from each other when said flexible insert portion is bent, and restoring said lengthwise members to their predetermined original positions when said insert portion is straightened.
Claim 2
Dependent Claim
151 words
An endoscope which comprises: a flexible insert portion adapted to be inserted into an object to be inspected; a plurality of lengthwise members including at least an optical fiber bundle for transmitting illuminating light to said object and a channel member which are provided within said flexible insert portion in a freely movable manner and; at least one elastic restoring body which is elastically compressible in a cross-sectional direction of said flexible insert portion in a flexible section of said flexible insert portion so as to partition said lengthwise members off from each other; wherein said elastic restoring body allows for movement of said lengthwise members in a cross-sectional plane of said flexible insert portion in arbitrary directions while keeping said lengthwise members partitioned off from each other when said flexible insert portion is bent, and restoring said lengthwise members to their predetermined original positions when said insert portion is straightened.
Claim 3
Dependent Claim
55 words
The endoscope according to claim 1, wherein said restoring body is provided at three separate locations in the insert section, respectively, at a first location near a bending section, at a second junction position of said insert section with respect to a control unit, and a third, midway position of said first and second positions.
Claim 4
Dependent Claim
13 words
The endoscope according to claim 1, wherein said restoring member comprises foamed rubber.
Claim 5
Dependent Claim
33 words
The endoscope according to claim 3, wherein said restoring body is made of two-liquid foamed rubber materials that are allowed to foam by mixing two liquids so as to react with each other.
Claim 6
Dependent Claim
31 words
The endoscope according to claim 1, wherein said restoring body comprises a piece of sponge shaped to partition the cross-sectional space in said insert section into a desired number of sections.
References Cited (Backward Citations)
US3266059A
Cited
JPS5089182A
Cited
US4236509A
Cited
US4452236A
Cited
US4655257A
Cited
US4904048A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-11-01 | 1997-05-03 | 1997-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-11-01 | 2001-05-03 | 2001-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-11-01 | 2005-05-03 | 2005-11-02 | $7700.00 | Window Closed / Lapsed |