Patent US3835841A successfully refreshed from Google Patents.
US3835841A
Expired / Lapsed
US
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Oblique view type endoscope
Assignee: Olympus Corp
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Filing: 1973-05-31
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Granted: 1974-09-17
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Expires: 1993-05-31
Abstract
Abstract An oblique view type endoscope whose distal end has an inclined end plane provided with a view window to bring a view field obliquely upward, wherein forceps is positioned on the upper side of the distal end to have the end of the forceps brought into the view field.
Inventors
- 👤 M Terada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:48
CPC Classifications
A; A61; A61B; A61B1/00; A61B1/12; A61B1/00064; A61B1/00071; A61B1/0008; A61B1/00098; A61B1/00163; A61B1/00165; A61B1/00174; A61B1/00179; A61B1/012; A61B1/018
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
105 words
An oblique view type endoscope comprising: a distal end having a front end plane surface inclined to the longitudinal axis thereof; a view window formed in the inclined front surface; and a forceps opening bored in the upper wall of the distal end portion defining an obtuse angle with the inclined front surface, said opening being disposed behind the view window in the direction of the insertion of said endoscope into a body portion, and one end of said opening extending to the inclined front surface to enable the end portion of the forceps to be brought into the view field of the view window.
Claim 2
Dependent Claim
105 words
An oblique view type endoscope comprising: a distal end having a front end plane surface inclined to the longitudinal axis thereof; a view window formed in the inclined front surface; and a forceps opening bored in the upper wall of the distal end portion defining an obtuse angle with the inclined front surface, said opening being disposed behind the view window in the direction of the insertion of said endoscope into a body portion, and one end of said opening extending to the inclined front surface to enable the end portion of the forceps to be brought into the view field of the view window.
Claim 3
Dependent Claim
35 words
The endoscope according to claim 1 wherein there is further provided a forceps adapted to be drawn out through the forceps opening at an obtuse included angle to the longitudinal axis of the distal end.
Claim 4
Dependent Claim
22 words
The endoscope according to claim 1 wherein the distal end further has at least one illumination window formed in the inclined end.
Claim 5
Dependent Claim
36 words
The endoscope according to claim 1 wherein the distal end further has water and air ports bored in the inclined front plane surface and a suction tube for water and air disposed in the forceps opening.
Claim 6
Dependent Claim
44 words
The endoscope according to claim 4 wherein the illumination windows are positioned on both sides of the view window and the water and air ports are cut out in a block provided on the opposite side of the illumination windows to the forceps opening.
Claim 7
Dependent Claim
27 words
The endoscope according to claim 4 wherein said water and air ports are disposed ahead of said forceps opening in said direction of insertion of said endoscope.
Claim 8
Dependent Claim
28 words
The endoscope according to claim 3 wherein said at least one illumination window is disposed ahead of said forceps opening in said direction of insertion of said endoscope.
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) | 1977-09-16 | 1978-03-18 | 1978-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-16 | 1982-03-18 | 1982-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-16 | 1986-03-18 | 1986-09-17 | $7700.00 | Window Closed / Lapsed |