Patent US4449993A successfully refreshed from Google Patents.
US4449993A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter module for dust collector system
Assignee: Equifab Inc
•
Filing: 1982-07-19
•
Granted: 1984-05-22
•
Expires: 2002-07-19
Abstract
Abstract A filter module comprises a frame bridged by a plurality of spaced-apart arch members, on which is supported a one-piece filter element comprising a plurality of pockets which each enshroud an arch member, and which connect into a mouth portion circumscribing the frame and held in position by a drawstring. The filter module is easily erected, and a seal between the inlet and outlet sides of filter equipment employing the module is easily provided.
Inventors
- 👤 Willard Bergeron
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:30
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/02; Y; Y10; Y10S; Y10S55/00; Y10S55/12; Y10S55/31
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
95 words
A filter module comprising a frame, a plurality of spaced-apart arch members supported therefrom to bridge over a one side thereof, a one-piece filter bag having a mouth portion generally circumscribing said frame and a plurality of pockets opening into the mouth, each said pocket enveloping a respective one of said arch members, said frame comprising two opposing sides and, on each side thereof, a first, fixed member and a second movable member spaced therefrom, and means for urging said movable member towards said fixed member to clamp the legs of said arch members therebetween.
Claim 2
Dependent Claim
95 words
A filter module comprising a frame, a plurality of spaced-apart arch members supported therefrom to bridge over a one side thereof, a one-piece filter bag having a mouth portion generally circumscribing said frame and a plurality of pockets opening into the mouth, each said pocket enveloping a respective one of said arch members, said frame comprising two opposing sides and, on each side thereof, a first, fixed member and a second movable member spaced therefrom, and means for urging said movable member towards said fixed member to clamp the legs of said arch members therebetween.
Claim 3
Dependent Claim
22 words
A filter module as defined in claim 1, wherein said filter bag is provided with means for adjustably constricting the mouth thereof.
Claim 4
Dependent Claim
32 words
A filter module as defined in claim 2, wherein said filter bag extends at least partly onto the other side of said frame where it is constricted by said adjustable constricting means.
Claim 5
Dependent Claim
28 words
A filter module as defined in claim 3, wherein said frame includes inwardly turned wall portions at said other side to form a support surface for said bag.
Claim 6
Dependent Claim
50 words
A gas filter comprising the module of claims 1, 2 or 3, and further comprising a housing having inlet and outlet openings, a baffle wall intermediate said openings, means supporting said gas filter module within said housing with said frame and filter bag in sealed relation with said baffle wall.
Claim 7
Dependent Claim
43 words
A filter module as defined in claim 1, wherein said means for urging said movable member comprises a plurality of bolts located at spaced intervals between said fixed member and said movable member, said bolts further providing axial location for said arch members.
Claim 8
Dependent Claim
28 words
A filter module as defined in claim 6, wherein each said arch member comprises a pair of generally identical arch elements held in spaced relationship by axial spacers.
Claim 9
Dependent Claim
52 words
A filter module as defined in claim 7, wherein said arch members include lateral spacers each having opposing ends, the opposing ends of the lowest lateral spacer of each arch member bearing on a respective one of said movable members to provide a locating stop for said arch member on said frame.
References Cited (Backward Citations)
US514440A
Cited
US1012122A
Cited
US1708065A
Cited
US1754477A
Cited
FR624160A
Cited
US2325905A
Cited
US2502560A
Cited
US2867289A
Cited
US2907406A
Cited
US2932362A
Cited
US3401505A
Cited
US3385033A
Cited
US3396516A
Cited
US3443366A
Cited
US3887032A
Cited
US4129428A
Cited
US4227903A
Cited
US4193780A
Cited
US4323376A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-05-22 | 1987-11-21 | 1988-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-22 | 1991-11-21 | 1992-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-22 | 1995-11-21 | 1996-05-22 | $7700.00 | Window Closed / Lapsed |