Patent US4558709A successfully refreshed from Google Patents.
US4558709A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas introducing apparatus for respiratory gas analyzer
Assignee: Toshiba Corp
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Filing: 1983-10-25
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Granted: 1985-12-17
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Expires: 2003-10-25
Abstract
Abstract A gas introducing apparatus for a respiratory gas analyzer which comprises a gas introducing tube for guiding sampled gas from an airway tube inserted into the airway of a patient to a gas analyzer, and a sintered metal filter hermetically and detouchably mounted on a distal end of the gas introducing tube.
Inventors
- 👤 Satoshi Aida
- 👤 Ayao Itoh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:34
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/08; A61B5/097; A61M; A61M16/00; A61M16/08; A61M16/0816; A61M16/0841; A61M16/085; A61M16/10; A61M16/105; A61M16/106; A61M16/1065
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
62 words
A gas introducing apparatus for a respiratory gas analyzer, comprising: a metal filter disposed in a respiratory gas flow passage for filtering and sampling the respiratory gas, said metal filter being made of sintered metal powders; and a gas introducing tube, a distal end of which is hermetically connected with said metal filter, for guiding a sampled gas to said gas analyzer.
Claim 2
Dependent Claim
62 words
A gas introducing apparatus for a respiratory gas analyzer, comprising: a metal filter disposed in a respiratory gas flow passage for filtering and sampling the respiratory gas, said metal filter being made of sintered metal powders; and a gas introducing tube, a distal end of which is hermetically connected with said metal filter, for guiding a sampled gas to said gas analyzer.
Claim 3
Dependent Claim
24 words
An apparatus according to claim 1, including a metal mounting cylinder fixed to said filter and mounting said filter to said gas introducing tube.
Claim 4
Dependent Claim
19 words
An apparatus according to claim 2, wherein said metal mounting cylinder is detachably mounted on said gas introducing tube.
Claim 5
Dependent Claim
28 words
An apparatus according to claim 1, wherein said metal filter is obtained by sintering a metal powder having a particle size of several to several hundreds of micrometers.
Claim 6
Dependent Claim
14 words
An apparatus according to claim 1, wherein said metal filter consists of stainless steel.
Claim 7
Dependent Claim
18 words
An apparatus according to claim 1, wherein said metal filter is detachably mounted on said gas introducing tube.
Claim 8
Dependent Claim
92 words
A gas introducing apparatus for a respiratory gas analyzer, comprising: a metal filter disposed in a respiratory gas flow passage for filtering and sampling the respiratory gas, said metal filter being made of sintered metal powders; a metal mounting cylinder having an inner diameter of 0.12 to 0.5 mm, one end of which is fixed to said metal filter; and a gas introducing tube, a distal end of which is hermetically connected with another end of said mounting cylinder for guiding a sampled gas through said metal filter to said gas analyzer.
Claim 9
Dependent Claim
92 words
A gas introducing apparatus for a respiratory gas analyzer, comprising: a metal filter disposed in a respiratory gas flow passage for filtering and sampling the respiratory gas, said metal filter being made of sintered metal powders; a metal mounting cylinder having an inner diameter of 0.12 to 0.5 mm, one end of which is fixed to said metal filter; and a gas introducing tube, a distal end of which is hermetically connected with another end of said mounting cylinder for guiding a sampled gas through said metal filter to said gas analyzer.
Claim 10
Dependent Claim
131 words
A gas introducing apparatus for a respiratory gas analyzer, comprising: a metal filter disposed in a respiratory gas flow passage for filtering and sampling the respiratory gas, said metal filter being made of sintered metal powders; a metal mounting cylinder having a distal end fixed to said metal filter and a proximal end; a gas introducing tube, a distal end of which is hermetically and detachably connected with said proximal end of said mounting cylinder for guiding a sampled gas through said metal filter to said gas analyzer; a clamping means clamping said gas introducing tube to said metal mounting cylinder; and an O-ring provided around an outer wall of said metal mounting cylinder for preventing said respiratory gas flow from leaking through the outer wall of said metal mounting cylinder.
Claim 11
Dependent Claim
131 words
A gas introducing apparatus for a respiratory gas analyzer, comprising: a metal filter disposed in a respiratory gas flow passage for filtering and sampling the respiratory gas, said metal filter being made of sintered metal powders; a metal mounting cylinder having a distal end fixed to said metal filter and a proximal end; a gas introducing tube, a distal end of which is hermetically and detachably connected with said proximal end of said mounting cylinder for guiding a sampled gas through said metal filter to said gas analyzer; a clamping means clamping said gas introducing tube to said metal mounting cylinder; and an O-ring provided around an outer wall of said metal mounting cylinder for preventing said respiratory gas flow from leaking through the outer wall of said metal mounting cylinder.
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) | 1988-12-16 | 1989-06-17 | 1989-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-12-16 | 1993-06-17 | 1993-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-12-16 | 1997-06-17 | 1997-12-17 | $7700.00 | Window Closed / Lapsed |