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US4024858A Expired / Lapsed US ⏱️ 0.0 years remaining

Endoscope

Assignee: Machida Endoscope Co Ltd
•
Filing: 1975-01-30
•
Granted: 1977-05-24
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Expires: 1995-01-30
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Abstract

Abstract A flat tubular structure, which comprises two tubes arranged side by side and enclosed within an outer tube, with each of the inner tubes having a structure capable of bending but incapable of transmitting a twisting effort through the whole length when a torque is applied at one end, behaves such that when it is twisted at its one end, while holding its intermediate portion, its other end is twisted by the same amount, with its intermediate portion remaining flat without being twisted. Such a flat tubular structure is used as a flexible tube portion of an endoscope. When the intermediate portion of such a flexible tube portion is located within the gullet, by turning a grip portion outside the body the tip portion within the body is turned by the same amount, as the grip portion and the intermediate portion is prevented from turning since it bears against the gullet. With this construction, it is possible to observe the inside of the body at various angles without squeezing the windpipe, that is, with less pain to the patient. Also, an endoscope having a flexible tube portion of an increased sectional area can be produced.

Inventors

  • 👤 Toshio Chikama

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-22 23:48
CPC Classifications
A; A61; A61B; A61B1/00; A61B1/005; A61B1/0051; A61B1/0055

Claims Analysis

Total Claims: 9
Claim 1
Independent Claim 136 words
An endoscope for insertion into the body through the mouth and into the gullet comprising a grip portion end located outside the body, an intermediate portion for location in the gullet, and a tip end, said intermediate portion being flexible and comprising two tubes arranged side by side, said two tubes being joined at said tip and grip portion ends, said intermediate portion including said two tubes comprising a fixed cross-sectional non-circular shape having opposite sides thereof in parallel relation to conform to the shape of the gullet, said intermediate portion retaining said non-circular shape and bearing against the gullet to prevent rotation of the intermediate portion held in the gullet while transmitting angular rotation of the grip portion end to the tip end so that said tip and grip portion ends rotate an equal amount.
Claim 2
Dependent Claim 136 words
An endoscope for insertion into the body through the mouth and into the gullet comprising a grip portion end located outside the body, an intermediate portion for location in the gullet, and a tip end, said intermediate portion being flexible and comprising two tubes arranged side by side, said two tubes being joined at said tip and grip portion ends, said intermediate portion including said two tubes comprising a fixed cross-sectional non-circular shape having opposite sides thereof in parallel relation to conform to the shape of the gullet, said intermediate portion retaining said non-circular shape and bearing against the gullet to prevent rotation of the intermediate portion held in the gullet while transmitting angular rotation of the grip portion end to the tip end so that said tip and grip portion ends rotate an equal amount.
Claim 3
Dependent Claim 22 words
An endoscope according to claim 1, wherein said non-circular shape comprises said opposite parallel sides joined at their ends by circular segments.
Claim 4
Dependent Claim 17 words
An endoscope according to claim 1, wherein each of said tubes is formed as a braided structure.
Claim 5
Dependent Claim 39 words
An endoscope according to claim 1, wherein each of said tubes comprises three helically wound strips arranged one over another, with an intermediate one of said helical strips being wound oppositely with respect to the other two helical strips.
Claim 6
Dependent Claim 54 words
An endoscope according to claim 1, wherein one of said two tubes is formed as a braided structure, and the other of said two tubes comprises three helically wound strips arranged one over another, with an intermediate one of said three helical strips being wound oppositely with respect to the two other helical strips.
Claim 7
Dependent Claim 28 words
An endoscope according to claim 1, wherein one of said two tubes is formed as a braided structure, and the other tube comprises a single helically wound strip.
Claim 8
Dependent Claim 49 words
An endoscope according to claim 1, wherein one of said tubes comprises three helically wound strips arranged one over another, with an intermediate one of said helical strips being wound oppositely with respect to the other two helical strips, and the other tube comprises a single helically wound strip.
Claim 9
Dependent Claim 19 words
An endoscope according to claim 1, wherein at least one of said tubes is made of a metal material.

References Cited (Backward Citations)

US2243992A Cited
FR1347596A Cited
US3739770A Cited
US3788304A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1980-05-23 1980-11-22 1981-05-24 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1984-05-23 1984-11-22 1985-05-24 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1988-05-23 1988-11-22 1989-05-24 $7700.00 Window Closed / Lapsed

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