US4826513A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laser smoke particulate/odor filter system
Assignee: STACK HOLDINGS Inc
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Filing: 1988-01-25
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Granted: 1989-05-02
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Expires: 2008-01-25
Abstract
Abstract There is herein described an improved laser smoke particulate/odor filter including an upstream gross particulate portion that both filters and disperses the smoke, a single charcoal odor adsorption portion, a downstream particulate portion for removing smaller gross particles, and a final filtering portion for filtering out any remaining undesirable contaminated particulate. Another embodiment utilizes an upstream particulate portion that filters and disperses the smoke followed by a first and second charcoal adsorption portions of unequal sizes that are separated by a second smoke dispersion member disposed between the first and second charcoal odor adsorption portions.
Inventors
- 👤 Wyman H. Stackhouse
- 👤 Ian M. Williamson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:30
CPC Classifications
B; B01; B01D; B01D50/00; A; A61; A61L; A61L9/00; A61L9/16; A62; A62B; A62B23/00; B01D46/00; B01D46/10; B01D46/12
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
135 words
A laser smoke particulate/odor filter system usable in a laser smoke evacuation system for surgical procedure environments, including: a generally cylindrical hollow housing having a gas inlet and an opposite gas outlet and defining within said housing a gas path therebetween; at least one particulate filter portion supported in said housing adjacent said inlet in said gas path; a first charcoal odor adsorption portion supported in said housing downstream of said aforementioned particulate filter portion in said gas path; a second charcoal odor adsorption portion supported in said housing downstream of said first charcoal odor adsorption portion in said gas path; and a smoke dispersion member supported in said housing between said first and second charcoal odor adsorption portions in said gas path, said dispersion member being a perforated screen having a central impervious disc.
Claim 2
Dependent Claim
135 words
A laser smoke particulate/odor filter system usable in a laser smoke evacuation system for surgical procedure environments, including: a generally cylindrical hollow housing having a gas inlet and an opposite gas outlet and defining within said housing a gas path therebetween; at least one particulate filter portion supported in said housing adjacent said inlet in said gas path; a first charcoal odor adsorption portion supported in said housing downstream of said aforementioned particulate filter portion in said gas path; a second charcoal odor adsorption portion supported in said housing downstream of said first charcoal odor adsorption portion in said gas path; and a smoke dispersion member supported in said housing between said first and second charcoal odor adsorption portions in said gas path, said dispersion member being a perforated screen having a central impervious disc.
Claim 3
Dependent Claim
27 words
The laser smoke particulate/odor filter system according to claim 1, wherein said second charcoal odor adsorption portion is relatively larger than said first charcoal odor adsorption portion.
Claim 4
Dependent Claim
22 words
The laser smoke particulate/odor filter system according to claim 1, wherein said screen lies in a plane generally orthogonal to said path.
Claim 5
Dependent Claim
27 words
The laser smoke particulate/odor filter system according to claim 1, also including a 0.5 micron filtration fiberglass portion disposed downstream of said second charcoal odor adsorption portion.
Claim 6
Dependent Claim
22 words
The laser smoke particulate/odor filter system according to claim 1, wherein said odor adsorption portions are of activated virgin coconut charcoal material.
Claim 7
Dependent Claim
31 words
The laser smoke particulate/odor fitler system according to claim 1, wherein said particulate filter includes an upstream gross particulate filter poriton, and a downstream particulate portion for removing smaller gross particles.
Claim 8
Dependent Claim
25 words
The laser smoke articulate/odor filter system according to claim 6, wherein said particulate filter portions are disposed on either side of said odor adsorption portions.
Claim 9
Dependent Claim
20 words
The laser smoke particulate/odor filter system according to claim 6, wherein said upstream and downstream particulate portions are polyurethane pads.
Claim 10
Dependent Claim
125 words
A laser smoke particulate/odor system usable in a laser smoke evacuation system for surgical procedure environments comprising: a generally cylindrical hollow housing having a gas inlet and an opposite gas outlet and defining within said housing a gas path therebetween; a single upstream particulate filter and dispersion portion supporting asid housing adjacent said inlet in said gas path for filtering said gas path and dispersing said gas path to thereby obtain a more uniform gas flow within said housing; a single charcoal odor absoprtion portion supported in said housing downstream of said aforementioned particulate filter portion in said gas path; and in which said upstream particulate filter and dispersion portion comprises a screen mounted on a compressed paper ring in which is disposed a pad.
Claim 11
Dependent Claim
125 words
A laser smoke particulate/odor system usable in a laser smoke evacuation system for surgical procedure environments comprising: a generally cylindrical hollow housing having a gas inlet and an opposite gas outlet and defining within said housing a gas path therebetween; a single upstream particulate filter and dispersion portion supporting asid housing adjacent said inlet in said gas path for filtering said gas path and dispersing said gas path to thereby obtain a more uniform gas flow within said housing; a single charcoal odor absoprtion portion supported in said housing downstream of said aforementioned particulate filter portion in said gas path; and in which said upstream particulate filter and dispersion portion comprises a screen mounted on a compressed paper ring in which is disposed a pad.
Claim 12
Dependent Claim
43 words
A laser smoke particulate/oder filter system according to claim 9 which includes a pair of end bells with one fixedly connected to the gas inlet portion of said hollow housing and the other connected to the gas outlet portion of said hollow housing.
References Cited (Backward Citations)
US1789194A
Cited
US2825424A
Cited
US3526557A
Cited
US3944403A
Cited
US3877909A
Cited
US4064876A
Cited
US4236902A
Cited
GB2078128A
Cited
US4448594A
Cited
US4619675A
Cited
US4597781A
Cited
US4619672A
Cited
US4687579A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-05-01 | 1992-10-31 | 1993-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-01 | 1996-10-31 | 1997-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-01 | 2000-10-31 | 2001-05-02 | $7700.00 | Window Closed / Lapsed |