Patent US3903877A successfully refreshed from Google Patents.
US3903877A
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Endoscope
Assignee: Olympus Corp
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Filing: 1974-05-29
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Granted: 1975-09-09
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Expires: 1994-05-29
Abstract
Abstract An endoscope comprising a single nozzle disposed near the view window provided at the distal end of said endoscope so as to wash the surface of said window and a separately provided feed line which is branched near the nozzle into a washing liquid tube and an air tube selectively used as occasion demands.
Inventors
- 👤 Masaaki Terada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:40
CPC Classifications
A; A61; A61B; A61B1/00; A61B1/00064; A61B1/00066; A61B1/00068; A61B1/00071; A61B1/0008; A61B1/00089; A61B1/00091; A61B1/00101; A61B1/00163; A61B1/00174; A61B1/00177; A61B1/12; A61B1/127
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
65 words
An endoscope comprising a distal end; a view window formed at the distal end; a nozzle disposed at the distal end with the opening of said nozzle directed to the view window; and two separately provided feed lines one for washing liquid and the other for air, respectively connected to the nozzle through a common passage communicating with each said feed line adjacent the nozzle.
Claim 2
Dependent Claim
65 words
An endoscope comprising a distal end; a view window formed at the distal end; a nozzle disposed at the distal end with the opening of said nozzle directed to the view window; and two separately provided feed lines one for washing liquid and the other for air, respectively connected to the nozzle through a common passage communicating with each said feed line adjacent the nozzle.
Claim 3
Dependent Claim
24 words
An endoscope according to claim 1 wherein the distal end has a flat end face, to which the view window and nozzle are fitted.
Claim 4
Dependent Claim
39 words
An endoscope according to claim 2 wherein the nozzle is located on one side of the view window and a suction port is disposed on the opposite side of said view window in a symmetrical relationship with the nozzle.
Claim 5
Dependent Claim
24 words
An endoscope according to claim 1 wherein the distal end has a flat side wall, to which the view window and nozzle are fitted.
Claim 6
Dependent Claim
44 words
An endoscope according to claim 1 wHich further comprises a control unit operatively connected to the distal end, said control unit being provided with supply means for selectively supplying washing liquid to the washing liquid feed line and air to the air feed line.
Claim 7
Dependent Claim
33 words
An endoscope according to claim 5 wherein said supply means comprises a piston and cylinder, and washing liquid and air are selectively delivered to the nozzle by the corresponding operation of the piston.
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) | 1978-09-08 | 1979-03-10 | 1979-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-08 | 1983-03-10 | 1983-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-08 | 1987-03-10 | 1987-09-09 | $7700.00 | Window Closed / Lapsed |