Patent US2772927A successfully refreshed from Google Patents.
US4572784A
Expired / Lapsed
US
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Multiple-disc filters
Assignee: Individual
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Filing: 1984-10-11
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Granted: 1986-02-25
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Expires: 2004-10-11
Abstract
Abstract A multiple-disc type fluid filter is described wherein the housing includes an outer tubular section, and an inner section having two tubular members with an end plate at one end of one tubular member and securable to an open end of the outer housing section. The two tubular members of the inner housing section include ribs for supporting the filter discs. The end plate and the tubular member to which it is secured are open and constitute one of the filter ports, e.g. the inlet port, and the opposite end of the same tubular member is closed and terminates short of the outer housing section. The second tubular member, which is longitudinally spaced from the closed end of the first tubular member, constitutes the other filter port, e.g. outlet port. The stack of filter discs are all of substantially the same uniform thickness, but there are included a plurality of further discs of non-uniform thickness such as to correct the accumulation of non-uniformities in the latter discs.
Inventors
- 👤 Mordeki Drori
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:21
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/11; B01D29/13; B01D29/15; B01D29/23; B01D29/44; B01D29/46; B01D35/00; B01D35/14; B01D35/143; B01D35/157; B01D2201/00; B01D2201/28; B01D2201/282
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
269 words
A fluid filter including a housing having means defining inlet and outlet ports and a cylindrical filter body extending longitudinally within said housing, characterized in that said housing includes an outer housing section of generally tubular configuration open at both its ends; an inner housing section including first and second longitudinally-extending tubular members and an end plate at one end of said first tubular member and securable to means defining a first open end of said outer housing section; and means on the outer face of said first and second tubular members for supporting said cylindrical filter body; both said end plate and said one end of said first tubular member being open and constituting one of said filter ports; the opposite end of said first tubular member being closed and terminating short of said outer housing section; said second tubular member being open at both ends, with one end longitudinally spaced from the closed end of said first tubular member, and the opposite open end received within the second open end of the outer housing section and constituting the other of said filter ports; means defining a first passageway through the wall of said first tubular member between its closed end and said end plate, establishing communication between said one filter port and the outer face of said filter body; and means defining a second passageway between said closed end of the first tubular member and the adjacent open end of the second tubular member for establishing communication between the outer face of said filter body and said second tubular member constituting the other of said filter ports.
Claim 2
Dependent Claim
269 words
A fluid filter including a housing having means defining inlet and outlet ports and a cylindrical filter body extending longitudinally within said housing, characterized in that said housing includes an outer housing section of generally tubular configuration open at both its ends; an inner housing section including first and second longitudinally-extending tubular members and an end plate at one end of said first tubular member and securable to means defining a first open end of said outer housing section; and means on the outer face of said first and second tubular members for supporting said cylindrical filter body; both said end plate and said one end of said first tubular member being open and constituting one of said filter ports; the opposite end of said first tubular member being closed and terminating short of said outer housing section; said second tubular member being open at both ends, with one end longitudinally spaced from the closed end of said first tubular member, and the opposite open end received within the second open end of the outer housing section and constituting the other of said filter ports; means defining a first passageway through the wall of said first tubular member between its closed end and said end plate, establishing communication between said one filter port and the outer face of said filter body; and means defining a second passageway between said closed end of the first tubular member and the adjacent open end of the second tubular member for establishing communication between the outer face of said filter body and said second tubular member constituting the other of said filter ports.
Claim 3
Dependent Claim
62 words
The filter according to claim 1, further including a displaceable member within said first tubular member and defining with its closed end an expansible and contractable control chamber, and a valve member disposed within said first tubular member and coupled to said displaceable member to move therewith toward or away from said first passageway for controlling the flow of the fluid therethrough.
Claim 4
Dependent Claim
26 words
The filter according to claim 2, wherein said one filter port is the filter inlet port, and said other filter port is the filter outlet port.
Claim 5
Dependent Claim
50 words
The filter according to claim 3, further including first means establishing communication between said control chamber and said filter inlet port, and second means connected to a space defined between said displaceable member and said valve member for controlling the latter in response to the pressure in said control chamber.
Claim 6
Dependent Claim
87 words
The filter according to claim 4, wherein said second means vents to the atmosphere the space defined between said displaceable member and said valve member, said first means including a control valve which is movable to a first position establishing said communication between said filter inlet port and said control chamber and thereby to actuate said valve member to close said first passageway, or to a second position connecting said control chamber to the atmosphere, and thereby to actuate said valve member to open said first passageway.
Claim 7
Dependent Claim
57 words
The filter according to claim 5, wherein said valve member is of smaller cross-sectional area than said displaceable member, such that when said control valve is in its second position connecting the control chamber to the atmosphere, the inlet pressure applied to said valve member moves it to its open position with respect to said first passageway.
Claim 8
Dependent Claim
14 words
The filter according to claim 5, wherein said control valve is a manually-operated valve.
Claim 9
Dependent Claim
86 words
The filter according to claim 4, wherein said first means continuously establishes communication between said control chamber and said inlet port, the space defined between said displaceable member and said valve member being connected to the outlet side of said filter body such that the valve member automatically moves towards its closed position with respect to said first passageway upon the occurence of a predetermined pressure differential on the opposite side of said filter body indicating that the filter body is overly clogged with dirt particles.
Claim 10
Dependent Claim
67 words
The filter according to claim 3, further including first means establishing communication between said outlet port and said control chamber, and second means venting the space defined between said displaceable member and said valve member to the atmosphere, such that said valve member automatically moves towards and away from said first passageway to regulate the fluid flow therethrough in response to the pressure at said outlet port.
Claim 11
Dependent Claim
36 words
The filter according to claim 1, wherein said first passageway is defined by a plurality of openings formed through said first tubular member, slightly inwardly of said end wall and between same and said filter body.
Claim 12
Dependent Claim
27 words
The filter according to claim 1, wherein said second passageway is defined by a plurality of radially-extending ribs connecting the two tubular members together in spaced relationship.
Claim 13
Dependent Claim
36 words
The filter according to claim 11, wherein said two tubular members and said radially-extending ribs connecting them together are formed on their outer faces with a plurality of axially-extending ribs for supporting the cylindrical filter body.
Claim 14
Dependent Claim
17 words
The filter according to claim 12, wherein said cylindrical filter body includes a stack of filter discs.
Claim 15
Dependent Claim
67 words
The filter according to claim 13, wherein the outer end of said first tubular member is formed with an annular ring serving as an end stop for one end of the stack of filter discs, the outer end of the second tubular member being formed with threads for threadedly receiving another ring serving as an end stop for the opposite end of the stack of filter discs.
Claim 16
Dependent Claim
51 words
The filter according to claim 13, wherein said stack of filter discs includes a plurality of like discs of substantially the same uniform thickness and at least one further disc of non-uniform thickness such as to correct the accumulation of non-uniformities in the thicknesses of the like discs in the stack.
References Cited (Backward Citations)
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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) | 1989-02-24 | 1989-08-26 | 1990-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-02-24 | 1993-08-26 | 1994-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-02-24 | 1997-08-26 | 1998-02-25 | $7700.00 | Window Closed / Lapsed |