Patent US3894854A successfully refreshed from Google Patents.
US3894854A
Expired / Lapsed
US
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Dust collector apparatus
Assignee: DIXIE MFGR Co
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Filing: 1973-11-27
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Granted: 1975-07-15
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Expires: 1993-11-27
Abstract
Abstract A dust collector apparatus having a cyclone filter stage in its upper section in communication with a filter plenum section, in turn, in communication with a plurality of filter tubes depending from a plate member. A hopper is disposed below the lower ends of the filter tubes for receiving contaminants therein. The apparatus is provided with a blow case manifold which directs a stream of high velocity air from the outside of the filter tubes through the filter medium to dislodge the cake accumulating on the inside surface. The blow case continually travels the length of the tubes to dislodge the cake as it travels and is provided with a flexible air hose means for supplying air thereto. The blow case manifold is provided with flexible guide means to keep the manifold properly centered as it travels up and down along the filter tubes. The filter tubes are provided with means for easily replacing the tubes in the apparatus and drive means are provided for moving the blow case manifold along the longitudinal axis of the tubes and is provided with safety brake means for preventing the blow case manifold from falling in the casing should the drive means fail.
Inventors
- 👤 Russell C Wolfe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:58
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/02; B01D46/04; B01D46/66; B01D46/68; B01D46/682; B01D50/00; B01D50/20; B01D2265/00; B01D2265/02; B01D2265/028; B01D2275/00; B01D2275/20; B01D2275/205; Y; Y10; Y10S; Y10S55/00; Y10S55/26
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
250 words
A DUCT COLLECTOR COMPRISING A HOUSING WITH A FIRST CYCLONE STAGE HAVING AN INLET OPENING AND A SECOND STAGE FILTER WITH THE CYCLONE STAGE BEING AT THE TOP OF THE HOUSING, SAID STAGES BEING IN COMMUNICATION WITH ONE ANOTHER, SAID SECOND STAGE COMPRISING A TUBE SHEET AND A PLURALITY OF FLEXIBLE FILTER TUBES DEPENDING FROM SAID TUBE SHEET AND OPEN AT THEIR UPPER AND LOWER ENDS, HOPPER MEANS COMMUNICATING WITH THE LOWER OPEN ENDS OF SAID FILTER TUBES, BLOW CASE MEANS DISPOSED TO TRAVEL SUBSTANTIALLY THE LENGTH OF SAID TUBES TO DISLODGE CONTAMINANT CAKE FROM THE INTERIOR OF SAID TUBES, INCLUDING A MANIFOLD HAVING A PLURALITY OF UNIFORMLY SPACED AIR TUBES DISPOSED AT SUBSTANTIALLY RIGHT ANGLES TO EACH OTHER FORMING TUBE SETS WITH LONGITUDINAL ROWS OF ORIFICES THEREIN TO EMIT A ROW OF AIR JET STREAMS THEREFROM, WITH THE SPACE FORMED BY ADJACENT TUBES OF SAID TUBE SETS PROVIDING AN OPENING FOR A FILTER TUBE, AND A FILTER TUBE EXTENDING THROUGH AT LEAST ONE SAID TUBE OPENING AND SAID ORIFICES EXTENDING ALONG THE SIDES OF SAID TUBES FACING SAID FILTER TUBE OPENING, MEANS FOR SUPPLYING AIR TO SAID BLOW CASE MEANS, GUIDE MEANS FOR PROPERLY CENTERING SAID BLOW CASE MEANS WITH RESPECT TO SAID FILTER TUBES AS IT TRAVELS, AND DRIVE MEANS FOR MOVING SAID BLOW CASE MEANS ALONG SAID FILTER TUBES, AND SAFETY BRAKE MEANS OPERATIVELY CONNECTED TO SAID DRIVE MEANS TO HOLD SAID BLOW CASE MEANS IN A FIXED POSITION IF SAID DRIVE MEANS FAILS DUE TO BREAKAGE,
Claim 2
Dependent Claim
250 words
A DUCT COLLECTOR COMPRISING A HOUSING WITH A FIRST CYCLONE STAGE HAVING AN INLET OPENING AND A SECOND STAGE FILTER WITH THE CYCLONE STAGE BEING AT THE TOP OF THE HOUSING, SAID STAGES BEING IN COMMUNICATION WITH ONE ANOTHER, SAID SECOND STAGE COMPRISING A TUBE SHEET AND A PLURALITY OF FLEXIBLE FILTER TUBES DEPENDING FROM SAID TUBE SHEET AND OPEN AT THEIR UPPER AND LOWER ENDS, HOPPER MEANS COMMUNICATING WITH THE LOWER OPEN ENDS OF SAID FILTER TUBES, BLOW CASE MEANS DISPOSED TO TRAVEL SUBSTANTIALLY THE LENGTH OF SAID TUBES TO DISLODGE CONTAMINANT CAKE FROM THE INTERIOR OF SAID TUBES, INCLUDING A MANIFOLD HAVING A PLURALITY OF UNIFORMLY SPACED AIR TUBES DISPOSED AT SUBSTANTIALLY RIGHT ANGLES TO EACH OTHER FORMING TUBE SETS WITH LONGITUDINAL ROWS OF ORIFICES THEREIN TO EMIT A ROW OF AIR JET STREAMS THEREFROM, WITH THE SPACE FORMED BY ADJACENT TUBES OF SAID TUBE SETS PROVIDING AN OPENING FOR A FILTER TUBE, AND A FILTER TUBE EXTENDING THROUGH AT LEAST ONE SAID TUBE OPENING AND SAID ORIFICES EXTENDING ALONG THE SIDES OF SAID TUBES FACING SAID FILTER TUBE OPENING, MEANS FOR SUPPLYING AIR TO SAID BLOW CASE MEANS, GUIDE MEANS FOR PROPERLY CENTERING SAID BLOW CASE MEANS WITH RESPECT TO SAID FILTER TUBES AS IT TRAVELS, AND DRIVE MEANS FOR MOVING SAID BLOW CASE MEANS ALONG SAID FILTER TUBES, AND SAFETY BRAKE MEANS OPERATIVELY CONNECTED TO SAID DRIVE MEANS TO HOLD SAID BLOW CASE MEANS IN A FIXED POSITION IF SAID DRIVE MEANS FAILS DUE TO BREAKAGE,
Claim 3
Dependent Claim
28 words
The dust collector of claim 1 wherein said air supply means includes a fan and a flexible elongated duct of adjustable length in communication therewith and said manifold.
Claim 4
Dependent Claim
72 words
The dust collector of claim 1 wherein said blow case means is substantially square in configuration and said housing has a top and bottom filter tube sheet, and roller means are disposed aT the corners of said blow case means, and flexible cables are secured to said tube sheets and carried by said roller means to guide and center said blow case means in said housing when it moves along said tubes.
Claim 5
Dependent Claim
22 words
The dust collector of claim 3 wherein said roller means comprise a triangular bracket with a roller disposed on each leg thereof.
Claim 6
Dependent Claim
30 words
The dust collector of claim 4 wherein the rollers on one side of said blow case means are parallel and in alignment with each other and form a roller set.
Claim 7
Dependent Claim
55 words
The dust collector of claim 5 wherein there is a cable carried by each roller set, said cable having one end secured to one of said tube sheets and passing over one roller of said set, and under the other roller of said set and having its opposite end secured to the other tube sheet.
Claim 8
Dependent Claim
27 words
The dust collector of claim 1 wherein said drive means includes an endless chain connected to said blow case means and a drive motor in said housing.
Claim 9
Dependent Claim
47 words
The dust collector of claim 7 wherein said chain is connected at one end to the top of said blow case means, passes over a drive sprocket operatively connected to said drive motor, and has its other end connected to the bottom of said blow case means.
Claim 10
Dependent Claim
41 words
The dust collector of claim 8 wherein said one end of said drive chain has a connecting link connected to two chains with their opposite ends extending transversely of the housing and secured to opposite sides of said blow case means.
Claim 11
Dependent Claim
98 words
The dust collector of claim 9 wherein said brake means comprise pawls with teeth journalled on shafts carried on opposite sides of said blow case means with coiled springs on said shafts having a turn with a free end bearing against one side of each of said pawls normally urging it in a direction toward the inner surface of said housing, and vertical members disposed adjacent said pawls to be engaged thereby if said chains break, said chains being connected to the opposite side of said pawls to normally maintain them out of contact with said vertical members.
Claim 12
Dependent Claim
34 words
The dust collector of claim 1, wherein said brake means comprise pawls carried by said blow case means and a bar means adapted to be engaged by said pawls if said chain means breaks.
Claim 13
Dependent Claim
27 words
The dust collector of claim 11 wherein biasing means are provided for engaging said pawls to normally maintain said pawls out of contact with said bar means.
Claim 14
Dependent Claim
65 words
The dust collector of claim 12 wherein said bar means comprises vertical bars extending through opposite sides of said blow case means, and said pawls comprise lugs with teeth, said lugs being journalled on shafts carred on opposite sides of said blow case, and said biasing means are coiled springs on said shaft having a turn with a free end in contact with said lugs.
Claim 15
Dependent Claim
33 words
The dust collector of claim 1, wherein said filter tube sheet has depending skirts on its upper open ends and clamp means are provided to snap onto the top of said filter tubes.
Claim 16
Dependent Claim
18 words
The dust collector of claim 14 wherein said clamp means is a rectangular plastic member with cross bars.
Claim 17
Dependent Claim
24 words
The dust collector of claim 15 wherein a bottom tube sheet is provided and said filter tubes have adjustable clamping means securing them thereto.
Claim 18
Dependent Claim
57 words
The dust collector of claim 1 said cyclone stage inlet opening being a tangential inlet, a convolute baffle in said first stage and a plenum chamber having a central inlet opening, said tube sheet forming the bottom of said chamber, and clean air discharge means in said housing disposed adjacent the lower end of said filter tubes.
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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) | 1978-07-14 | 1979-01-13 | 1979-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-14 | 1983-01-13 | 1983-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-14 | 1987-01-13 | 1987-07-15 | $7700.00 | Window Closed / Lapsed |