US4848990A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dust collector adapted for use in a hopper dryer
Assignee: Matsui Mfg Co Ltd
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Filing: 1988-06-06
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Granted: 1989-07-18
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Expires: 2008-06-06
Abstract
Abstract A dust collector adapted for use in a hopper dryer including an outer rigid member and an inner filter member which is provided concentrically with the outer rigid member, the outer rigid member having a number of pores punched in its peripheral surface and the inner filter member having a filter element corrugated axially of the filter member.
Inventors
- 👤 Osamu Matsui
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:21
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/24; B01D46/2403; B01D46/2411; B01D46/52; B01D46/521
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
176 words
A dust collector adapted for use in a hopper dryer, said hopper dryer drying materials supplied thereinto via dry gas and said collector being connected to a gas outlet of said hopper dryer, said collector comprising: an outer rigid member and an inner filter member which is provided concentrically with said outer rigid member, said outer rigid member having a number of pores provided in its peripheral surface, said inner filter member comprising a filter element, the cross section of said filter element being corrugated axially to said filter member; said outer rigid member being fixed to an upper lid at its top and to a lower lid at its bottom, and said inner filter member being fixed to an upper circular frame at its top and to a lower circular frame at its bottom; and said inner filter member being detachably provided in said outer rigid member so that said upper circular frame and lower circular frame of said inner filter are held by said upper lid and lower lid of said outer rigid member.
Claim 2
Dependent Claim
176 words
A dust collector adapted for use in a hopper dryer, said hopper dryer drying materials supplied thereinto via dry gas and said collector being connected to a gas outlet of said hopper dryer, said collector comprising: an outer rigid member and an inner filter member which is provided concentrically with said outer rigid member, said outer rigid member having a number of pores provided in its peripheral surface, said inner filter member comprising a filter element, the cross section of said filter element being corrugated axially to said filter member; said outer rigid member being fixed to an upper lid at its top and to a lower lid at its bottom, and said inner filter member being fixed to an upper circular frame at its top and to a lower circular frame at its bottom; and said inner filter member being detachably provided in said outer rigid member so that said upper circular frame and lower circular frame of said inner filter are held by said upper lid and lower lid of said outer rigid member.
Claim 3
Dependent Claim
21 words
A dust collector as defined in claim 1, further comprising a dust box connected to a bottom of said dust collector.
Claim 4
Dependent Claim
41 words
A dust collector as defined in claim 1, wherein said inner filter member is fixed to a supporting means by fitting in mortises cut in said supporting means such that said mortises have the same cross-section as said corrugated filter member.
Claim 5
Dependent Claim
20 words
A dust collector as defined in claim 3, wherein said outer rigid member is detachably mounted to said lower lid.
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) | 1992-07-17 | 1993-01-16 | 1993-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-17 | 1997-01-16 | 1997-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-17 | 2001-01-16 | 2001-07-18 | $7700.00 | Window Closed / Lapsed |