US4056374A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tubular gas filter
Assignee: American Air Filter Co Inc
•
Filing: 1976-02-19
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Granted: 1977-11-01
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Expires: 1996-02-19
Abstract
Abstract An improved tubular filter bag of two piece construction, one piece being coated with a flexible and abrasive resistant coating, the coated piece being in communication with a flow-through inlet for absorbing the impact of the bag during cleaning. Also disposed at approximately the maximum impact point of the filter bag is a support member to restrict flexing of the bag during cleaning.
Inventors
- 👤 Dennis L. Hixenbaugh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:28
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/02; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/3154; Y10T428/31544
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
149 words
A filter bag for removing particles from a dirty gas stream comprising: a first tubular flexible gas filter member having at least one opening in one end thereof, and an opposed end having means for attaching to a bag support means; a second tubular flexible dust impervious fabric member having a cross-sectional area substantially the same as said first tubular member and having an opening in each end thereof, said second tubular member having a flexible and abrasive resistant coating thereon, one end being connected to said one end of said first tubular member, and, the other end including means for attaching to a flow inlet means; and, one motion restricting ring member attached to one of said tubular members remote from said flow inlet means disposed adjacent to the connection between said first tubular member and said second tubular member maintaining said connection in a substantially non-flexing position.
Claim 2
Dependent Claim
149 words
A filter bag for removing particles from a dirty gas stream comprising: a first tubular flexible gas filter member having at least one opening in one end thereof, and an opposed end having means for attaching to a bag support means; a second tubular flexible dust impervious fabric member having a cross-sectional area substantially the same as said first tubular member and having an opening in each end thereof, said second tubular member having a flexible and abrasive resistant coating thereon, one end being connected to said one end of said first tubular member, and, the other end including means for attaching to a flow inlet means; and, one motion restricting ring member attached to one of said tubular members remote from said flow inlet means disposed adjacent to the connection between said first tubular member and said second tubular member maintaining said connection in a substantially non-flexing position.
Claim 3
Dependent Claim
29 words
The filter bag of claim 1 wherein said motion restricting ring member extends around the outer periphery of said first tubular member adjacent said opening in said one end.
Claim 4
Dependent Claim
14 words
The filter bag of claim 2 wherein said ring member is a metallic member.
Claim 5
Dependent Claim
14 words
The filter bag of claim 2 wherein said ring member is a plastic member.
Claim 6
Dependent Claim
18 words
The filter bag of claim 1 wherein said first tubular member is sewn to said second tubular member.
Claim 7
Dependent Claim
46 words
The filter bag of claim 1 wherein said first tubular member is fiberglas and said second tubular member is fiberglas coated with polytetrafluoroethylene, said fiberglas of said first tubular member being of one weave and said fiberglas of said second tubular member being of another weave.
Claim 8
Dependent Claim
51 words
The filter bag of claim 1 wherein said flow inlet means is a plate member having an aperture therein with an outwardly extending flange portion, said flange portion having an outer diameter substantially the same as the inner diameter of said second tubular member to receive said second tubular member thereon.
Claim 9
Dependent Claim
42 words
The filter bag of claim 7, said flange member having an outwardly extending lip portion thereon, said one end of said second tubular member having a connecting ring member attached thereto, said connecting ring member nesting under said lip of said flange.
Claim 10
Dependent Claim
16 words
The filter bag of claim 8 wherein said ring member is a resilient flexible ring member.
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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) | 1980-10-31 | 1981-05-02 | 1981-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-31 | 1985-05-02 | 1985-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-31 | 1989-05-02 | 1989-11-01 | $7700.00 | Window Closed / Lapsed |