US4841952A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Endoscope with an optical system
Assignee: Olympus Corp
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Filing: 1987-10-30
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Granted: 1989-06-27
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Expires: 2007-10-30
Abstract
Abstract An endoscope having an control section and an inserting section fitted with an optical system. A tubular lens frame of the optical system is disposed at the head part of the inserting section and an inclined end face which is tapered inward is formed all around the end face of the lens frame. A plurality of optical members are arranged in the lens frame and the inclined end face of the lens frame forms a substantially V-shaped annular groove together with the outside surface of an optical member disposed at the end portion of the lens frame. An adhesive is accumulated first in the annular groove and then filled in the clearance between the optical member and the lens frame. In this way, the optical member is secured airtightly to the lens frame.
Inventors
- 👤 Michio Sato
- 👤 Koji Kambara
- 👤 Yukio Nakajima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 00:36
CPC Classifications
A; A61; A61B; A61B1/00; A61B1/005; A61B1/0051; G; G02; G02B; G02B23/00; G02B23/24; G02B23/2476; G02B7/00; G02B7/02; G02B7/021
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
121 words
An endoscope having an operation section and an insertion section containing an optical system, said endoscope comprising: a tubular lens frame provided with a distal end portion of said insertion section and having an end face inclined to the axis of the lens frame; a plurality of optical members arranged in said lens frame, one of said optical members partly projecting from the end face of said lens frame, which includes a convex lens having a spherical face and a cylindrical body, thus a substantially V-shaped annular groove being defined by the inclined end face of said lens frame and the external circumferential surface of said body; and adhesive filled in a gap between said optical member and said lens frame.
Claim 2
Dependent Claim
121 words
An endoscope having an operation section and an insertion section containing an optical system, said endoscope comprising: a tubular lens frame provided with a distal end portion of said insertion section and having an end face inclined to the axis of the lens frame; a plurality of optical members arranged in said lens frame, one of said optical members partly projecting from the end face of said lens frame, which includes a convex lens having a spherical face and a cylindrical body, thus a substantially V-shaped annular groove being defined by the inclined end face of said lens frame and the external circumferential surface of said body; and adhesive filled in a gap between said optical member and said lens frame.
Claim 3
Dependent Claim
44 words
The endoscope according to claim 1, further comprising: a housing disposed at the distal end portion of said insertion section, said housing having a cylindrical projection, into which said lens frame is fitted; and an insulating member covering the outside surface of said housing.
Claim 4
Dependent Claim
77 words
The endoscope according to claim 1, wherein said insertion section has a bending portion which is bent by manipulating said operation section and a flexible portion connected to said bending portion by means of a coupling member, said flexible portion having a reinforcing member consisting of a plurality of spiral tubes superposed radially, at least the outermost one of said spiral tubes is removed at the connected part of said reinforcing member disposed inside said coupling member.
Claim 5
Dependent Claim
47 words
The endoscope according to claim 1, wherein said optical members are secured air tightly to said lens frame by accumulating the adhesive in said annular groove in advance and then having said adhesive gradually filled in the gap formed between said optical members and said lens frame.
Claim 6
Dependent Claim
167 words
An endoscope comprising: an operation section and an insertion section containing an optical system, said insertion section having a bending portion which is bent by manipulating said operation section and a flexible portion connected to said bending portion by means of a coupling member, said flexible portion having a reinforcing member consisting of a plurality of spiral tubes superposed radially, at least the outermost one of said spiral tubes is removed at the connected part of said reinforcing member disposed inside said coupling member; a tubular lens frame provided within a distal end portion of said insertion section and having an end face inclined to the axis of the lens frame; a plurality of optical members arranged in said lens frame, one of said optical members partly projecting from the end face of said lens frame, thus defining a substantial V-shaped annular groove together with the inclined end face of said lens frame; and adhesive filled in a gap between said optical member and said lens frame.
Claim 7
Dependent Claim
167 words
An endoscope comprising: an operation section and an insertion section containing an optical system, said insertion section having a bending portion which is bent by manipulating said operation section and a flexible portion connected to said bending portion by means of a coupling member, said flexible portion having a reinforcing member consisting of a plurality of spiral tubes superposed radially, at least the outermost one of said spiral tubes is removed at the connected part of said reinforcing member disposed inside said coupling member; a tubular lens frame provided within a distal end portion of said insertion section and having an end face inclined to the axis of the lens frame; a plurality of optical members arranged in said lens frame, one of said optical members partly projecting from the end face of said lens frame, thus defining a substantial V-shaped annular groove together with the inclined end face of said lens frame; and adhesive filled in a gap between said optical member and said lens frame.
References Cited (Backward Citations)
US3583393A
Cited
US3643653A
Cited
US3788304A
Cited
US3946727A
Cited
JPS4844635A
Cited
US4279246A
Cited
US4327711A
Cited
JPS5826641A
Cited
JPS58190914A
Cited
JPS5929217A
Cited
JPH0529486A
Cited
JPH118711A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-06-26 | 1992-12-26 | 1993-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-06-26 | 1996-12-26 | 1997-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-06-26 | 2000-12-26 | 2001-06-27 | $7700.00 | Window Closed / Lapsed |