Patent US4931867A successfully refreshed from Google Patents.
Patent US3727764A successfully refreshed from Google Patents.
US3727764A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filtering apparatus having an integrally removable filter cartridge
Assignee: Individual
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Filing: 1971-11-22
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Granted: 1973-04-17
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Expires: 1991-11-22
Abstract
Abstract A filtering apparatus is described in which a filter assembly is encapsulated in a flexible, pliable, light weight shell and is removable as a unit from the filter housing without manually contacting filter media and/or liquid. The filter housing comprises a manifold and a cylindrical casing joined together to form a cavity for receiving the cartridge. The manifold further includes inlet and outlet conduits extending therethrough. The filter cartridge comprises a pair of cylindrical shells interconnected at their open ends, with the interior of the shells forming a cavity for receiving a filter assembly. The end plane of one of the cylindrical shells includes a pair of tubular extensions extending into the inlet and outlet conduits of the manifold. The two cartridge shells are made of plastic or other suitable material and are sufficiently flexible to bear against the side walls of the housing cavity during operation. In one embodiment, the mating ends of the cartridge shells are coupled by a telescoping connection and bonded. In another embodiment, the ends of the cartridge shells form mating annular flanges which are bonded together and further secured between two shoulders formed by the interconnecting housing members. The filter assembly preferably comprises a plurality of annular filter pads surrounding a perforated open ended sleeve and stacked between a pair of annular compression plates. To replace the encapsulated filter cartridge, the manifold and casing are separated and the used filter cartridge is removed as a unit. A new cartridge can be installed within the housing in a similar manner.
Inventors
- 👤 H Ogden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:12
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/30; B01D29/00; B01D29/96; B01D2201/00; B01D2201/30; B01D2201/301; B01D2201/307
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
168 words
An apparatus for filtering foreign matter and other contaminants from liquids or gases comprising: a pair of external housing members including a first member having inlet and outlet conduits extending through the first member and a second member connected to said first member to form a first cavity communicating with the inlet and outlet conduits; and a filter cartridge having a unitary housing positioned within said first cavity, said cartridge housing forming a second cavity for receiving a filter assembly comprising a filter media through which the liquid or gases are adapted to pass, said cartridge housing including two connected cartridge shells which form the second cavity, one of said cartridge shells having a pair of open ended conduit extensions extending through the body of the shell, said conduit extensions positioned to be respectively in fluid communication with the inlet and outlet conduits of said first member whereby said cartridge housing is removable as a unit from said first cavity after said external housing members have been separated.
Claim 2
Independent Claim
168 words
An apparatus for filtering foreign matter and other contaminants from liquids or gases comprising: a pair of external housing members including a first member having inlet and outlet conduits extending through the first member and a second member connected to said first member to form a first cavity communicating with the inlet and outlet conduits; and a filter cartridge having a unitary housing positioned within said first cavity, said cartridge housing forming a second cavity for receiving a filter assembly comprising a filter media through which the liquid or gases are adapted to pass, said cartridge housing including two connected cartridge shells which form the second cavity, one of said cartridge shells having a pair of open ended conduit extensions extending through the body of the shell, said conduit extensions positioned to be respectively in fluid communication with the inlet and outlet conduits of said first member whereby said cartridge housing is removable as a unit from said first cavity after said external housing members have been separated.
Claim 3
Independent Claim
159 words
An apparatus for filtering foreign matter and other contaminants from fluid comprising: a pair of external housing members including a first member having inlet and outlet conduits extending through the first member and a second member connected to said first member to form a cavity communicating with the inlet and outlet conduits; means for filtering the fluid including a filter media through which the fluid is adapted to pass; a fluid tight unitary cartridge housing member entirely sealing the means for filtering the fluid within the housing member and preventing fluid contact with the cavity, the housing member adapted to be positioned within the cavity; a pair of conduit members on the unitary housing member adapted to respectively communicate with the inlet and outlet conduits and providing the only ingress and egress paths for fluid to the filter media; and means for sealing the first member conduits and the unitary housing conduits to prevent fluid contact with the cavity.
Claim 4
Independent Claim
159 words
An apparatus for filtering foreign matter and other contaminants from fluid comprising: a pair of external housing members including a first member having inlet and outlet conduits extending through the first member and a second member connected to said first member to form a cavity communicating with the inlet and outlet conduits; means for filtering the fluid including a filter media through which the fluid is adapted to pass; a fluid tight unitary cartridge housing member entirely sealing the means for filtering the fluid within the housing member and preventing fluid contact with the cavity, the housing member adapted to be positioned within the cavity; a pair of conduit members on the unitary housing member adapted to respectively communicate with the inlet and outlet conduits and providing the only ingress and egress paths for fluid to the filter media; and means for sealing the first member conduits and the unitary housing conduits to prevent fluid contact with the cavity.
Claim 5
Dependent Claim
38 words
The invention of claim 2 wherein the conduit members on the unitary cartridge housing comprise a pair of extension members having open ends adapted to provide fluid communication with the inlet and outlet conduits on the first member.
Claim 6
Dependent Claim
18 words
The invention of claim 2 wherein said cartridge housing comprises a pair of cylindrical shells with interconnected ends.
Claim 7
Dependent Claim
39 words
The invention of claim 4 wherein the ends of said cartridge shells form a pair of mating annular flanges bonded together and positioned between a pair of shoulders formed by said housing members when said housing members are interconnected.
Claim 8
Dependent Claim
30 words
The invention of claim 4 wherein the end of one of said cartridge shells telescopes into the end of the other cartridge shell with the interengaging surfaces being bonded together.
Claim 9
Dependent Claim
15 words
The invention of claim 4 wherein said cartridge shells are made of a plastic material.
Claim 10
Dependent Claim
11 words
The invention of claim 7 wherein said plastic material is polypropylene.
Claim 11
Dependent Claim
11 words
The invention of claim 7 wherein said plastic material is polyethylene.
Claim 12
Dependent Claim
27 words
The invention of claim 4 wherein the first member and the second member are interconnected by interengaging thread means located on the open ends of each member.
Claim 13
Dependent Claim
23 words
The invention of cLaim 4 wherein the first member and the second member are connected by means of a plurality of threaded bolts.
Claim 14
Dependent Claim
44 words
The invention of claim 11 wherein each threaded bolt is rotatably mounted on a first flange formed on the second member with the threaded end of the bolt adapted to engage a threaded bore formed in a second flange formed on the first member.
Claim 15
Dependent Claim
32 words
The invention of claim 4 wherein the first member and the second member are hingeably connected on one side thereof and secured on the other side by means of a latch mechanism.
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US3344925A
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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) | 1976-04-16 | 1976-10-16 | 1977-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-16 | 1980-10-16 | 1981-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-16 | 1984-10-16 | 1985-04-17 | $7700.00 | Window Closed / Lapsed |