US3853527A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Particle collecting apparatus
Assignee: Robertson Co H H
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Filing: 1972-08-22
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Granted: 1974-12-10
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Expires: 1992-08-22
Abstract
Abstract A gas-laden stream is freed of its particulate material in an apparatus which includes a casing with an inlet opening, an outlet opening and at least one grouping of vanes which create a swirl in the gas stream passing through the grouping and at least one impeller which is rotatable under the impetus of the gas stream and creates a radial component of force in the gas stream tending to move the particles radially into engagement with the inner walls of the casing whence they gravitate to the base of the casing for elimination. A frustoconical baffle member is provided adjacent to the outlet opening to create turbulence which aids in particle removal.
Inventors
- 👤 J Andrews
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:46
CPC Classifications
B; B01; B01D; B01D45/00; B01D45/12; B01D45/14
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
226 words
Apparatus for separating particulate matter from a moving gas stream including a casing having an inlet opening and an outlet opening; the said casing having a longitudinal axis passing through the said inlet opening and said outlet opening; a grouping of fixed radial vanes disposed about the said axis and between the said inlet opening and the said outlet opening, said vanes being arranged to impart a swirl to the said gas stream in a given direction as it passes through the said casing; an impeller which is freely rotAtable about the said axis and located between the said grouping and the said outlet opening, said impeller having blades arranged to be rotated by the said moving gas stream in the direction of the swirl imparted to said gas stream by the vanes of the said grouping, and thereby to impart a radial velocity component to the said gas stream; means in the bottom of said casing for collecting particulate matter which is removed from the said gas stream; and a second grouping of fixed radial vanes disposed about the said axis and between the first said impeller and the said outlet opening, the vanes of the said second grouping being arranged to impart a swirl to the said gas stream in a direction opposite to that imparted by the vanes of the first said grouping.
Claim 2
Dependent Claim
226 words
Apparatus for separating particulate matter from a moving gas stream including a casing having an inlet opening and an outlet opening; the said casing having a longitudinal axis passing through the said inlet opening and said outlet opening; a grouping of fixed radial vanes disposed about the said axis and between the said inlet opening and the said outlet opening, said vanes being arranged to impart a swirl to the said gas stream in a given direction as it passes through the said casing; an impeller which is freely rotAtable about the said axis and located between the said grouping and the said outlet opening, said impeller having blades arranged to be rotated by the said moving gas stream in the direction of the swirl imparted to said gas stream by the vanes of the said grouping, and thereby to impart a radial velocity component to the said gas stream; means in the bottom of said casing for collecting particulate matter which is removed from the said gas stream; and a second grouping of fixed radial vanes disposed about the said axis and between the first said impeller and the said outlet opening, the vanes of the said second grouping being arranged to impart a swirl to the said gas stream in a direction opposite to that imparted by the vanes of the first said grouping.
Claim 3
Dependent Claim
86 words
The apparatus of claim 1 wherein a frustoconical wall extends inwardly from said casing and is positioned between the said impeller and the said outlet opening, the said frustoconical wall having a major opening adjacent to the said outlet opening and a minor opening between the said major opening and the said impeller, the said major opening having a cross-sectional area greater than the cross-sectional area of the said outlet opening, the minor opening having a cross-sectional area which is less than the said outlet opening.
Claim 4
Dependent Claim
75 words
The apparatus of claim 1 wherein a second impeller, freely rotatable about the said axis, is disposed between the said second grouping and the said outlet opening, the said second impeller having blades arranged to be rotated by the said moving gas stream in the direction of the swirl imparted to the said gas stream by the vanes of said second grouping, and thereby to impart a radial velocity component to the said gas stream.
Claim 5
Dependent Claim
88 words
The apparatus of claim 3 wherein a frustoconical wall extends inwardly from said casing and is positioned between the said second impeller and the said outlet opening, the said frustoconical wall having a major opening adjacent to the said outlet opening and a minor opening between the said major opening and the said second impeller, the said major opening having a cross-sectional area greater than the cross-sectional area of the said outlet opening, the minor opening having a cross-sectional area which is less than the said outlet opening.
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) | 1977-12-09 | 1978-06-10 | 1978-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-09 | 1982-06-10 | 1982-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-09 | 1986-06-10 | 1986-12-10 | $7700.00 | Window Closed / Lapsed |