US4247316A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas separation filter device having a handle
Assignee: Bank of Nova Scotia
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Filing: 1979-07-09
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Granted: 1981-01-27
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Expires: 1999-07-09
Abstract
Abstract A gas separation device has a 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
- 👤 William A. Putman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:00
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/10; B01D46/42; B01D46/4227; B01D2265/00; B01D2265/06; B01D2275/00; B01D2275/10
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
268 words
A gas separation filter device for separating particulate from a gas stream passing through the filter device, 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 filter media and attached to the sheet of gas separation filter media, the first handle means is substantially geometrically, centrally disposed of the sheet of gas separation filter media an comprises a generally planer base member lying in the plane of and in abutment with the sheet of gas separation filter media and a finger grasping flange integrally formed with and projecting outwardly from the base member in a direction generally away from the gas separation filter media for grasping by the fingers of a hand while installing and removing the gas separation filter device from an installation; and, second handle means disposed on the other side of the sheet of gas separation filter media from the first handle means and attached to the sheet of gas separation filter media, the second handle means is substantially geometrically centrally disposed of the sheet of gas separation filter media and comprises a generally planer base member lying in the plane of and in abutment with the sheet of gas separation filter media and a finger grasping flange integrally formed with and projecting outwardly from the base member in a direction generally away from the gas separation filter media for grasping by the fingers of a hand while installing and removing the gas separation filter device from an installation.
Claim 2
Dependent Claim
268 words
A gas separation filter device for separating particulate from a gas stream passing through the filter device, 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 filter media and attached to the sheet of gas separation filter media, the first handle means is substantially geometrically, centrally disposed of the sheet of gas separation filter media an comprises a generally planer base member lying in the plane of and in abutment with the sheet of gas separation filter media and a finger grasping flange integrally formed with and projecting outwardly from the base member in a direction generally away from the gas separation filter media for grasping by the fingers of a hand while installing and removing the gas separation filter device from an installation; and, second handle means disposed on the other side of the sheet of gas separation filter media from the first handle means and attached to the sheet of gas separation filter media, the second handle means is substantially geometrically centrally disposed of the sheet of gas separation filter media and comprises a generally planer base member lying in the plane of and in abutment with the sheet of gas separation filter media and a finger grasping flange integrally formed with and projecting outwardly from the base member in a direction generally away from the gas separation filter media for grasping by the fingers of a hand while installing and removing the gas separation filter device from an installation.
Claim 3
Dependent Claim
44 words
The gas separation filter device of claim 1, wherein: the first and second handle means are disposed opposite each other; and, the first and second handle means are connected to each other by connecting connection means through the sheet of gas separation filter media.
Claim 4
Dependent Claim
36 words
The gas separation filter device of claim 2, wherein: the base member of the first handle means is generally circular in shape; and, the base member of the second handle means is generally circular in shape.
Claim 5
Dependent Claim
61 words
The gas separation filter of claim 3, wherein: the flange for finger grasping of the first handle means project outwardly from the periphery of the generally circular base member of the first handle means and, the flange for finger grasping of the second handle means projects outwardly from the periphery of the generally circular base member of the second handle means.
Claim 6
Dependent Claim
24 words
The gas separation filter device of claim 4, wherein the first and second handle means are connected to each other at their base members.
Claim 7
Dependent Claim
29 words
The gas separation filter device of claim 5, wherein the flange of each of the handles projects at an angle to the side of the sheet of filter material.
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) | 1984-01-27 | 1984-07-28 | 1985-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-01-27 | 1988-07-28 | 1989-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-01-27 | 1992-07-28 | 1993-01-27 | $7700.00 | Window Closed / Lapsed |