US4408602A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laser knife device
Assignee: Pentax Corp
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Filing: 1981-01-14
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Granted: 1983-10-11
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Expires: 2001-01-14
Abstract
Abstract A laser knife with which a laser beam having at least two different wavelengths to thereby eliminate undesirable effects on body tissue, blood and body fluids. First and second laser sources provide first and second operating light beams of different wavelengths. The first and second operating light beams are focused along the same optical axis with the focus points being independently controllable. An illuminating or guide light beam is also provided along the same optical axis which also can be independently focused.
Inventors
- 👤 Tohru Nakajima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:17
CPC Classifications
A; A61; A61B; A61B18/00; A61B18/18; A61B18/20; A61B18/201; A61B2018/2015; A61B2018/2025; A61B2018/2065; A61B2018/207
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
179 words
A laser knife device comprising first and second operating light beam sources emitting first and second laser light beams of different wave lengths respectively, a guide light source for producing a guide light beam, reflecting means for directing said first and second laser light beams from said first and second operating light beam sources and said guide light beam along a common path, a multi-articulation flexible light conducting device disposed along said common path, a focusing lens provided at an end of said multi-articulation flexible light conducting device, said reflecting means including first moveable mirror means having a first position for reflecting said guide light beam along said common path and a second position for removing said guide light beam from said common path, and second moveable mirror means having a first position for reflecting said first laser light beam along said common path when said first moveable mirror means is in said second position thereof while reflecting said second laser beam elsewhere and a second position permitting passage of said second laser light beam along said common path.
Claim 2
Dependent Claim
179 words
A laser knife device comprising first and second operating light beam sources emitting first and second laser light beams of different wave lengths respectively, a guide light source for producing a guide light beam, reflecting means for directing said first and second laser light beams from said first and second operating light beam sources and said guide light beam along a common path, a multi-articulation flexible light conducting device disposed along said common path, a focusing lens provided at an end of said multi-articulation flexible light conducting device, said reflecting means including first moveable mirror means having a first position for reflecting said guide light beam along said common path and a second position for removing said guide light beam from said common path, and second moveable mirror means having a first position for reflecting said first laser light beam along said common path when said first moveable mirror means is in said second position thereof while reflecting said second laser beam elsewhere and a second position permitting passage of said second laser light beam along said common path.
Claim 3
Dependent Claim
45 words
The device as claimed in claim 1 further comprising an absorber located in alignment with second moveable mirror means and said first operating light beam source for absorbing said second laser light beam when said second moveable mirror means is in said first position thereof.
Claim 4
Dependent Claim
31 words
The device as claimed in claim 1 wherein said first operating light beam source comprises a CO 2 laser and wherein said second operating light beam source comprises a YAG laser.
Claim 5
Dependent Claim
17 words
The device as claimed in claim 1 wherein said guide light beam source comprises a He--Ne laser.
Claim 6
Dependent Claim
56 words
The device as claimed in claim 1 further comprises a first focus position correcting lens positioned in the path of at least one of said laser light beams to focus said laser light beam and a second focus position correcting lens positioned in the path of said guide light beam to focus said guide light beam.
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) | 1986-10-10 | 1987-04-11 | 1987-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-10 | 1991-04-11 | 1991-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-10 | 1995-04-11 | 1995-10-11 | $7700.00 | Window Closed / Lapsed |