US4255175A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas separation filter device having a handle
Assignee: Bank of Nova Scotia
•
Filing: 1979-10-12
•
Granted: 1981-03-10
•
Expires: 1999-10-12
Abstract
Abstract A gas separation device has peripheral flow-through frame with a sheet of gas separation filter media disposed across the frame and attached to the frame for filtering a gas stream passing through the filter media. As an aid in installing and removing the gas separation device from an installation, one advantageous embodiment has a handle centrally disposed of and attached to the filter media and projecting from one face of the filter media while another advantageous embodiment has two handles centrally disposed of and attached to the filter media and projecting from opposite faces of the filter media.
Inventors
- 👤 O. DuWayne Wilkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:09
CPC Classifications
B; B01; B01D; B01D45/00; B01D45/04; B01D45/08; B01D45/10; B01D46/00; B01D46/42; B01D46/4227; B01D2265/00; B01D2265/06; B01D2275/00; B01D2275/10
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
148 words
A gas separation filter device for separating particulate from a gas stream passing through the filter device, of the type having a flow-through frame, a sheet of gas separation filter media disposed across the flow-through frame and attached to the flow-through frame, keeper means located on one side of the sheet of gas separation filter media, handle means located on the other side of the sheet of gas separation filter media from the keeper means, wherein the improvement comprises: a flexible cord extending through the sheet of gas separation filter media, the flexible cord being longer than the sheet of gas separation filter media is thick, and the flexible cord being attached at one of its ends to the keeper means and attached at the other of its ends to the handle means such that said keeper means and said handle means are spaced from said filter media.
Claim 2
Dependent Claim
148 words
A gas separation filter device for separating particulate from a gas stream passing through the filter device, of the type having a flow-through frame, a sheet of gas separation filter media disposed across the flow-through frame and attached to the flow-through frame, keeper means located on one side of the sheet of gas separation filter media, handle means located on the other side of the sheet of gas separation filter media from the keeper means, wherein the improvement comprises: a flexible cord extending through the sheet of gas separation filter media, the flexible cord being longer than the sheet of gas separation filter media is thick, and the flexible cord being attached at one of its ends to the keeper means and attached at the other of its ends to the handle means such that said keeper means and said handle means are spaced from said filter media.
Claim 3
Dependent Claim
152 words
A gas separation filter device for separating particulate from a gas stream passing through the filter device, of the type, comprising a flow-through frame, a sheet of gas separation filter media disposed across the flow-through frame and attached to the flow-through frame, first handle means located on one side of the sheet of gas separation media, and second handle means located on the other side of the sheet of gas separation filter media from the first handle means, wherein the improvement comprises: A flexible cord extending through the sheet of gas separation filter media, the flexible cord being longer than the sheet of gas separation filter media is thick, and the flexible cord being attached at one of its ends to the first handle means and attached at the other of its ends to the second handle means such that said first and second handle means are spaced from said filter media.
Claim 4
Dependent Claim
152 words
A gas separation filter device for separating particulate from a gas stream passing through the filter device, of the type, comprising a flow-through frame, a sheet of gas separation filter media disposed across the flow-through frame and attached to the flow-through frame, first handle means located on one side of the sheet of gas separation media, and second handle means located on the other side of the sheet of gas separation filter media from the first handle means, wherein the improvement comprises: A flexible cord extending through the sheet of gas separation filter media, the flexible cord being longer than the sheet of gas separation filter media is thick, and the flexible cord being attached at one of its ends to the first handle means and attached at the other of its ends to the second handle means such that said first and second handle means are spaced from said filter media.
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) | 1984-03-09 | 1984-09-08 | 1985-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-09 | 1988-09-08 | 1989-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-09 | 1992-09-08 | 1993-03-10 | $7700.00 | Window Closed / Lapsed |