US4682585A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical system for an endoscope
Assignee: Richard Wolf GmbH
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Filing: 1986-02-05
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Granted: 1987-07-28
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Expires: 2006-02-05
Abstract
Abstract The shaft of an endoscope for passing through a trocar sleeve or a guiding shaft is tapered towards the distal extremity, and this taper is followed proximally by at least one shallowly concave peripheral constriction. The distal objective of the endoscope is thus spaced from the inner walls and distal edges of the trocar sleeve or guiding shaft, so that residues on these inner walls or edges do not contaminate or obscure objective but are instead scraped off by the peripheral constriction.
Inventors
- 👤 Siegfried Hiltebrandt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:04
CPC Classifications
A; A61; A61B; A61B1/00; A61B1/00064; A61B1/00071; A61B1/00163
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
60 words
An optical system for an endoscope comprising a shaft receiving optical guide elements, said shaft being insertible through guide means into a bodily cavity for examination, said shaft at a distal end having an integral frusto conical portion converging towards the distal extremity, and said shaft having at least one peripheral constriction at a proximal side of the conical portion.
Claim 2
Dependent Claim
60 words
An optical system for an endoscope comprising a shaft receiving optical guide elements, said shaft being insertible through guide means into a bodily cavity for examination, said shaft at a distal end having an integral frusto conical portion converging towards the distal extremity, and said shaft having at least one peripheral constriction at a proximal side of the conical portion.
Claim 3
Dependent Claim
24 words
An optical system as claimed in claim 1, wherein said constriction is in the form of an annular concavity extending circumferentially around said shaft.
Claim 4
Dependent Claim
22 words
An optical system as claimed in claim 1, wherein said constriction is in the form of a helical groove around said shaft.
Claim 5
Dependent Claim
21 words
An optical system as claimed in claim 1, wherein said constriction is shallow in relation to the diameter of said shaft.
Claim 6
Dependent Claim
16 words
An optical system as claimed in claim 1, wherein said constriction is of substantially arcuate cross-section.
Claim 7
Dependent Claim
59 words
An optical system for an endoscope comprising a shaft receiving optical guide elements, which is insertible through guide means into a bodily cavity for examination, said shaft tapers conically towards its distal extremity and on the proximal side of the taper has at least one peripheral constriction having a form of an annular concavity extending circumferentially around said shaft.
Claim 8
Dependent Claim
59 words
An optical system for an endoscope comprising a shaft receiving optical guide elements, which is insertible through guide means into a bodily cavity for examination, said shaft tapers conically towards its distal extremity and on the proximal side of the taper has at least one peripheral constriction having a form of an annular concavity extending circumferentially around said shaft.
Claim 9
Dependent Claim
20 words
An optical system according to claim 6, wherein said constriction is shallow in relation to the diameter of said shaft.
Claim 10
Dependent Claim
15 words
An optical system according to claim 6, wherein said constriction is of substantially arcuate cross-section.
Claim 11
Dependent Claim
57 words
An optical system for an endoscope comprising a shaft receiving optical guide elements, which is insertible through guide means into a bodily cavity for examination, said shaft tapers conically towards its distal extremity and on the proximal side of the taper has at least one peripheral constriction having a form of a helical groove around said shaft.
Claim 12
Dependent Claim
57 words
An optical system for an endoscope comprising a shaft receiving optical guide elements, which is insertible through guide means into a bodily cavity for examination, said shaft tapers conically towards its distal extremity and on the proximal side of the taper has at least one peripheral constriction having a form of a helical groove around said shaft.
Claim 13
Dependent Claim
20 words
An optical system according to claim 9, wherein said constriction is shallow in relation to the diameter of said shaft.
Claim 14
Dependent Claim
15 words
An optical system according to claim 9, wherein said constriction is of substantially arcuate cross-section.
References Cited (Backward Citations)
US4215678A
Cited
US4589404A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-07-27 | 1991-01-26 | 1991-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-07-27 | 1995-01-26 | 1995-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-07-27 | 1999-01-26 | 1999-07-28 | $7700.00 | Window Closed / Lapsed |