US4179378A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter leaf
Assignee: Industrial Filter and Pump Manufacturing Co
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Filing: 1978-06-07
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Granted: 1979-12-18
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Expires: 1998-06-07
Abstract
Abstract The hubs of adjacent rotary filter leaves are sealed together by means of a unitary, rigid ring which extends across the interface between the leaves and sealably engages annular gaskets mounted in circumferential grooves in the hubs.
Inventors
- 👤 Earl A. Borre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:29
CPC Classifications
B; B01; B01D; B01D33/00; B01D33/15; B01D33/21; B01D33/23; B01D2201/00; B01D2201/34
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
180 words
For use in the pressure chamber of a pressure filter having a tubular, liquid outlet manifold disposed therein and on which a plurality of filter leaves are mounted in juxtaposed relationship for entraining solids from a liquid passed through said leaves from said chamber to said manifold, the combination wherein each of said filter leaves includes: a generally planar supporting and drainage core, a pair of axially aligned mounting rings forming the hub of the associated leaf, filter media mounted over said core sealably clamped to said hubs, means for clamping the supporting and drainage core of each leaf between the associated mounting rings, at least one of said rings having an annular groove in the circumferential surface thereof, a resilient sealing gasket mounted in said groove, and a rigid, tubular, imperforate cylindrical member extending over said gasket in sealing relationship therewith and being sealably connected to the mutually adjacent ring of the next adjacent filter leaf, whereby the juncture between adjacent filter leaves is sealed by said cylindrical member from the chamber in which said filter leaves are disposed.
Claim 2
Dependent Claim
180 words
For use in the pressure chamber of a pressure filter having a tubular, liquid outlet manifold disposed therein and on which a plurality of filter leaves are mounted in juxtaposed relationship for entraining solids from a liquid passed through said leaves from said chamber to said manifold, the combination wherein each of said filter leaves includes: a generally planar supporting and drainage core, a pair of axially aligned mounting rings forming the hub of the associated leaf, filter media mounted over said core sealably clamped to said hubs, means for clamping the supporting and drainage core of each leaf between the associated mounting rings, at least one of said rings having an annular groove in the circumferential surface thereof, a resilient sealing gasket mounted in said groove, and a rigid, tubular, imperforate cylindrical member extending over said gasket in sealing relationship therewith and being sealably connected to the mutually adjacent ring of the next adjacent filter leaf, whereby the juncture between adjacent filter leaves is sealed by said cylindrical member from the chamber in which said filter leaves are disposed.
Claim 3
Dependent Claim
26 words
The combination according to claim 1 wherein said cylindrical member is an integral part of one of the mounting rings of said next adjacent filter leaf.
Claim 4
Dependent Claim
21 words
The combination according to claim 1 wherein the mutually adjacent mounting rings of adjacent filter leaves are in direct mutual juxtaposition.
Claim 5
Dependent Claim
98 words
The combination according to claim 1 wherein each of said leaves further comprises first and second fabric sheets respectively disposed over the exterior surfaces of the associated core, each of said mounting rings having a circular groove in the circumferential surface thereof with each said groove being spaced from the adjacent face of the associated core, resilient annular gaskets disposed in said circular grooves and each having a generally cylindrical outer surface, said fabric sheets overlying a respective one of said gaskets, and annular clamps compressing said sheets against said gaskets to seal said sheets to said rings.
Claim 6
Dependent Claim
25 words
The combination according to claim 4 wherein said circular grooves, said resilient annular gaskets and said annular clamps all have substantially the same width dimension.
Claim 7
Dependent Claim
91 words
The combination according to claim 1 wherein each of said leaves further comprises: first and second fabric sheets respectively disposed over the exterior surfaces of the associated core, each of said mounting rings having a circular groove in the circumferential surface thereof with each said groove being spaced from the adjacent face of the associated core, said fabric sheets having continuous annular portions disposed in the respective ones of said circular grooves, and annular clamps pressing said sheets against the bottoms of said grooves to seal said sheets to said rings.
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) | 1982-12-17 | 1983-06-18 | 1983-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-12-17 | 1987-06-18 | 1987-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-12-17 | 1991-06-18 | 1991-12-18 | $7700.00 | Window Closed / Lapsed |