Patent US3864108A successfully refreshed from Google Patents.
US3864108A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dust collector with jet induced reverse air cleaning
Assignee: American Precision Industries Inc
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Filing: 1973-05-29
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Granted: 1975-02-04
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Expires: 1993-05-29
Abstract
Abstract A double-wall dust collector has an entrance chamber provided with an outlet opening and arranged to receive a flow of entrance gas laden with suspended particulate material, a gas-permeable filter medium operatively associated with the outlet opening to separate suspended solids from a flow of cleaned gas passing therethrough, and a reception chamber arranged to receive the flow of cleaned gas. A conduit communicates with an end of the reception chamber and serves to direct a flow of cleaned gas from the reception chamber to an exhaust outlet. The conduit is provided with an internal venturi jet pump means periodically operable for pumping cleaned gas to flow in a reverse direction thereby abruptly raising the pressure on the cleaned gas side of the filter medium to shock off particulate matter collected on the opposite side thereof. In one embodiment, a pair of such conduits, severally communicating with opposite ends of the reception chamber, are provided to direct simultaneously discharged countercurrent pulses toward one another in the reception chamber to amplify the effect of the reverse air cleaning.
Inventors
- 👤 Roger S Brookman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:33
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/02; B01D46/04; B01D46/42; B01D46/4281; B01D46/66; B01D46/70; B01D46/71
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
163 words
A dust collector, comprising: a first enclosure defining an entrance chamber arranged to receive entrance gas laden with particulate material, said first enclosure having a first wall provided with an outlet opening and also having a second wall; a gas-permeable filter medium closing said opening to separate said particulate material from cleaned gas passing through said filter medium; a second enclosure joining said first wall to define a reception chamber to receive said cleaned gas; first conduit means having a third wall operatively joining said second wall to provide a first conduit communicating with said reception chamber to convey a first flow of cleaned gas thereaway in a normal direction; and first venturi jet pump means arranged in said first conduit and selectively operable to cause cleaned gas to flow in a direction opposite to said normal direction for abruptly raising the pressure on the cleaned gas side of said filter medium to shock off particulate matter collected on the opposite side thereof.
Claim 2
Dependent Claim
163 words
A dust collector, comprising: a first enclosure defining an entrance chamber arranged to receive entrance gas laden with particulate material, said first enclosure having a first wall provided with an outlet opening and also having a second wall; a gas-permeable filter medium closing said opening to separate said particulate material from cleaned gas passing through said filter medium; a second enclosure joining said first wall to define a reception chamber to receive said cleaned gas; first conduit means having a third wall operatively joining said second wall to provide a first conduit communicating with said reception chamber to convey a first flow of cleaned gas thereaway in a normal direction; and first venturi jet pump means arranged in said first conduit and selectively operable to cause cleaned gas to flow in a direction opposite to said normal direction for abruptly raising the pressure on the cleaned gas side of said filter medium to shock off particulate matter collected on the opposite side thereof.
Claim 3
Dependent Claim
48 words
A dust colLector according to claim 1 wherein said first venturi jet pump means includes a normally upstream diffuser section, a normally downstream diffuser section, an intermediate throat section, and a nozzle arranged to discharge a jet of compressed gas in said opposite direction toward said throat section.
Claim 4
Dependent Claim
16 words
A dust collector according to claim 2 wherein said diffuser sections are of substantially equal length.
Claim 5
Dependent Claim
21 words
A dust collector according to claim 2 wherein said throat and diffuser sections are of substantially equal length one to another.
Claim 6
Dependent Claim
30 words
A dust collector according to claim 2 wherein said first venturi jet pump means includes transverse walls extending between said second and third walls to provide said throat diffuser sections.
Claim 7
Dependent Claim
21 words
A dust collector according to claim 5 wherein said throat and diffuser sections are of substantially equal length one to another.
Claim 8
Dependent Claim
42 words
A dust collector according to claim 5 wherein said diffuser sections are of substantially equal length and the said transverse walls of each of said diffuser sections are at an included angle to each other of from about 20* to about 25*.
Claim 9
Dependent Claim
49 words
A dust collector according to claim 1 wherein said first wall is substantially horizontal and has a plurality of openings corresponding to said outlet opening and said second wall is substantially vertical, said filter medium is provided for each of said openings and comprises a wire cage-supported filter bag.
Claim 10
Dependent Claim
109 words
A dust collector according to claim 1 wherein said first enclosure includes a fourth wall and further comprising second conduit means having a fifth wall operatively joining said fourth wall to provide a second conduit communicating with said reception chamber to convey a second flow of cleaned gas thereaway in a normal direction, selectively operable second venturi jet pump means arranged in said second conduit for a purpose similar to that of said first venturi jet pump means, each of said jet pump means including a nozzle, and means arranged to supply compressed gas simultaneously to such nozzles to create jets for causing said reverse flow of cleaned gas.
Claim 11
Dependent Claim
178 words
A dust collector according to claim 9 wherein said first wall is substantially horizontal and has a plurality of openings corresponding to said outlet opening, said second and fourth walls are substantially vertical, said filter medium is provided for each of said openings and comprises a wire cage-supported filter bag, said second enclosure is joined to said first wall to provide said reception chamber which has opposite ends, said first conduit means includes a third wall spaced from said second wall to define said first conduit which communicates with one end of said reception chamber, said second conduit means includes a fifth wall spaced from said fourth wall to define said second conduit which communicates with the opposite end of said reception chamber, each of said venturi pump means includes transverse walls extending between such spaced walls of the corresponding one of said conduits to provide an upper diffuser section, a lower diffuser section and an intermediate throat section, said nozzles being severally arranged at said lower diffuser sections to direct said jets upwardly toward said throat sections.
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) | 1978-02-03 | 1978-08-05 | 1979-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-03 | 1982-08-05 | 1983-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-03 | 1986-08-05 | 1987-02-04 | $7700.00 | Window Closed / Lapsed |