US3865022A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Exhaust fume treatment apparatus
Assignee: AHLRICH ALBERT G FORTY-FIVE PERCENT (45%) OF FULL AND UNDIVIDED RIGHT
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Filing: 1973-03-07
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Granted: 1975-02-11
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Expires: 1993-03-07
Abstract
Abstract An exhaust fume treatment apparatus for removing suspended or entrained material from a gas including a substantially cylindrical housing having a peripheral wall and inlet and outlet openings in opposite end walls. A suction blower coupled to the outlet of the housing has a rotatably driven shaft extending into the housing. A slinger wheel is rotatable on and with the shaft within the housing adjacent the inlet. The slinger wheel has an open face opposed to the inlet and a plurality of circumferentially spaced blades angled so the radially outer edge of each trails its radially inner edge during normal rotation of the shaft. Fumes drawn into the housing inlet by the suction blower pass outwardly through the blades and outlet. Materials in the gas are deposited on and thrown substantially radially outwardly by the blades toward the peripheral wall of the housing for collection. Embodiments of the invention shown disclose integration of the housing and suction blower with an exhaust hood having an air curtain. In one embodiment, an air curtain supply blower and the cylindrical housing and suction blower utilize coaxial conduits for communicating with an air curtain chamber and exhaust chamber, respectively, in the hood. In another embodiment, the air curtain supply blower shares a common shaft axis and drive motor means with the suction blower and cylindrical housing.
Inventors
- 👤 Willard K Ahlrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:32
CPC Classifications
B; B01; B01D; B01D45/00; B01D45/12; B01D45/14; F; F24; F24C; F24C15/00; F24C15/20; Y; Y10; Y10S; Y10S55/00; Y10S55/36
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
279 words
Exhaust fume treatment apparatus for removing contaminant materials from a gas, comprising in combination: a substantially cylindrical extractor housing having a peripheral wall and an inlet and an outlet in opposite end walls thereof; suction blower means coupled to the outlet of said housing for drawing gas therethrough and having a rotatably driven shaft extending into said housing; a slinger wheel on and rotatable by said shaft and located in said housing, said slinger wheel having an open face adjacent said inlet and having a plurality of circumferentially spaced gas contacting blades each angled so that the radially outer edge thereof trails the radially inner edge thereof during normal rotation of said shaft, the opposed downstream ends of said slinger wheel and housing being spaced by an open air passage unoccupied except by said shaft; and a shield spaced closely radially inboard of the said peripheral wall of said housing by a dead air space and being spaced remotely radially outwardly of said slinger wheel by a reduced gas velocity zone, the radial extent of said reduced gas velocity zone being at least several times that of said dead air space, said shield at least partially circumferentially surrounding said slinger wheel, said shield being pierced by a plurality of holes for receiving contaminant masses thrown outwardly by said slinger wheel and admitting same to said dead space between said shield and said housing peripheral wall; means for increasing axial uniformity of material build up on said blades comprising a radially extending air deflector disk fixed to said shaft axially within said slinger wheel, the periphery of said disk being spaced radially intermediate the shaft and inner slinger blade edges.
Claim 2
Dependent Claim
279 words
Exhaust fume treatment apparatus for removing contaminant materials from a gas, comprising in combination: a substantially cylindrical extractor housing having a peripheral wall and an inlet and an outlet in opposite end walls thereof; suction blower means coupled to the outlet of said housing for drawing gas therethrough and having a rotatably driven shaft extending into said housing; a slinger wheel on and rotatable by said shaft and located in said housing, said slinger wheel having an open face adjacent said inlet and having a plurality of circumferentially spaced gas contacting blades each angled so that the radially outer edge thereof trails the radially inner edge thereof during normal rotation of said shaft, the opposed downstream ends of said slinger wheel and housing being spaced by an open air passage unoccupied except by said shaft; and a shield spaced closely radially inboard of the said peripheral wall of said housing by a dead air space and being spaced remotely radially outwardly of said slinger wheel by a reduced gas velocity zone, the radial extent of said reduced gas velocity zone being at least several times that of said dead air space, said shield at least partially circumferentially surrounding said slinger wheel, said shield being pierced by a plurality of holes for receiving contaminant masses thrown outwardly by said slinger wheel and admitting same to said dead space between said shield and said housing peripheral wall; means for increasing axial uniformity of material build up on said blades comprising a radially extending air deflector disk fixed to said shaft axially within said slinger wheel, the periphery of said disk being spaced radially intermediate the shaft and inner slinger blade edges.
Claim 3
Dependent Claim
100 words
The apparatus of claim 1 in which said slinger wheel blades are radially narrow and substantially spaced from said shaft, the upstream ends thereof being joined by a common annular end plate adjacent said extractor housing inlet, the cross section of said blades being curved to provide a concave trailing face adapted to continuously collect and periodically outwardly throw off contaminate material masses, said suction blower means having a bladed wheel similar to said slinger wheel but of opposite hand, whereby gas movement through said suction blower blades is accelerative and gas movement through said slinger wheel blades is not.
Claim 4
Dependent Claim
29 words
The apparatus of claim 2 including motor means coupled to said shaft for maintaining slinger wheel blade tip speeds in the range of 2,100 to 2,200 feet per minute.
Claim 5
Dependent Claim
59 words
The apparatus of claim 1 in which the spacing of the slinger wheel radially from the peripheral wall of the housing substantially exceeds the spacing of said wheel from said inlet, the axial width of said open air passage between said slinger wheel and downstream housing end wall being a substantial fraction of the width of said slinger wheel.
Claim 6
Dependent Claim
46 words
The apparatus of claim 1 in which the holes are skewed and the axis of each has at least a component substantially aligned with a tangent to the periphery of the wheel whereby contaminant masses thrown from the wheel tend to pass axially through said holes.
Claim 7
Dependent Claim
106 words
The apparatus of claim 5 in which said shield extends axially beyond said slinger wheel toward said downstream end wall of said housing, the axes of said skewed holes in said shield having a further component angled longitudinally of said shield and corresponding to the migration axially of the slinger wheel of contaminant masses thrown from the slinger wheel due to exhaust air movement from said slinger wheel toward said downstream end wall of said housing, whereby to provide alignment of said holes in said shield with the path of contaminant masses thrown from said slinger wheel despite migration thereof with air from said slinger wheel.
Claim 8
Dependent Claim
43 words
The apparatus of claim 1 in which said shield is substantially horizontal and including means defining a contaminant outlet at a low point in the peripheral wall of said housing for receiving contaminant masses entrapped between said shield and said housing peripheral wall.
Claim 9
Dependent Claim
44 words
The apparatus of claim 7 including a collection trough fixed to said housing in communication with said contaminant outlet for receiving contaminant masses therefrom, said contaminant outlet and trough extending axially along said housing substantially the width of said shield and radially opposed thereto.
Claim 10
Dependent Claim
62 words
The apparatus of claim 8 including a conduit communicating with a low point in said trough and wherein said suction blower means includes a housing and including a conduit communicating between a low point on said suction blower means housing and said trough for draining to said trough any contaminant material escaping from said extractor housing into said suction blower means housing.
Claim 11
Dependent Claim
156 words
The apparatus of claim 1 in which said suction blower means comprises a centrifugal blower having a housing through which said shaft extends, a centrifugal, open-faced blower wheel mounted on said shaft for rotation therewith and within said blower housing, an inlet opening in the side of said blower housing, said open-faced blower wheel having an air inlet opening of diameter substantially less than the diameter of said extractor outlet and means defining a convexly curved inlet cone interposed between said extractor outlet and blower wheel air inlet opening for smoothly correspondingly reducing air flow cross section therebetween during normal rotation of said shaft, said extractor housing and blower housing being located in coaxial, close-spaced relation, said extractor outlet and blower housing inlet opening being in coaxially aligned communication and including annular flange means extending between said housing and surrounding said last-mentioned openings for defining a transfer passage shorter than said wheels between said lastmentioned openings.
Claim 12
Dependent Claim
62 words
The apparatus of claim 10 in which said annular flange means comprises a pair of snugly telescoped flanges extending from said extractor housing and blower housing, respectively, and including a web extending across the inner one of said annular flanges and a bearing on said web, said bearing supporting said shaft and said slinger wheel in cantilevered relation within said extractor housing.
Claim 13
Dependent Claim
94 words
The apparatus of claim 1 including an exhaust hood, an elongate equipment enclosure spaced from said hood and an exhaust conduit interconnecting said hood and an intermediate portion of said elongate equipment enclosure, said extractor housing and suction blower means lying within and having their common shaft extending along one end portion of said elongate equipment enclosure from an extractor inlet coupling with said exhaust conduit to a substantially horizontally directed suction blower means outlet at one end of said elongate enclosure, the other end portion of said elongate enclosure defining an air inlet.
Claim 14
Dependent Claim
65 words
The apparatus of claim 1 including an exhaust hood having inner wall means defining a downwardly opening exhaust chamber and outer wall means defining a downwardly opening air outlet chamber for establishing an air curtain, said extractor housing and suction blower means being disposed within said hood between said inner and outer wall means and for communicating said extractor housing inlet with said exhaust chamber.
Claim 15
Dependent Claim
33 words
The apparatus of claim 1 including an air supply blower having a shaft portion coaxial with and coupled to said shaft and common drive means for rotatably driving said shaft and shaft portion.
Claim 16
Dependent Claim
108 words
The apparatus of claim 14 including a further extractor housing and a further slinger wheel within said further extractor housing and mounted on said shaft portion for rotation thereWith, said further extractor housing being coupled to the inlet of said air supply blower and an air curtain-exhaust hood having an air curtain chamber communicating with the output of said air supply blower and an exhaust chamber communicating with the inlet of said first-mentioned extractor housing, whereby ambient air is cleaned before being applied to the air curtain portion of said housing and exhaust air from said hood exhaust chamber is cleaned before release from said suction blower means.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-02-10 | 1978-08-12 | 1979-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-10 | 1982-08-12 | 1983-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-10 | 1986-08-12 | 1987-02-11 | $7700.00 | Window Closed / Lapsed |