US3883431A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cleaning apparatus
Assignee: Daicel Corp
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Filing: 1974-04-22
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Granted: 1975-05-13
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Expires: 1994-04-22
Abstract
Abstract A cleaning apparatus for use in connection with fluid-flow tubing systems, particularly for cleaning tubular semipermeable membranes, comprising a cartridge which is adapted to supply scrubbing and cleaning objects such as sponge balls into the tubing system, and which is adapted to receive and contain the objects when the direction of fluid flow in the system is reversed. A by-pass conduit and a check valve are provided to permit fluid to flow around the cartridge when the flow direction is reversed.
Inventors
- 👤 Kiyoshi Ishii
- 👤 Shobu Konomi
- 👤 Yoshio Ishiguro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:43
CPC Classifications
B; B08; B08B; B08B9/00; B08B9/02; B08B9/027; B08B9/04; B08B9/053; B08B9/055; B08B9/0552; B01; B01D; B01D63/00; B01D63/06; B01D65/00; B01D65/02; B08B9/057; C; C02; C02F; C02F1/00; C02F1/44; B01D2321/00; B01D2321/20; B01D2321/2083; B01D65/04; C02F1/441; C02F2303/00; C02F2303/16; Y; Y10; Y10T; Y10T137/00; Y10T137/4891
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
206 words
In a fluid-flow system comprising a tubular piping arrangement having reversing valve means for reversing the direction of flow of fluid through the piping arrangement, one or more resiliently compressible objects movable back and forth through said piping arrangement to clean same, and retaining means adapted to retain said object or objects at the ends of the travel thereof through said piping arrangement, the improvement in which said retaining means comprises a container which is open at one end for receiving said objects from or directing said objects into said tubular piping arrangement and which is blocked at its opposite end by a porous barrier; by-pass conduit means connected in parallel with said container for by-passing liquid around said container; and check valve means coupled to the blocked end of the container and which is responsive to the direction of flow of liquid through said piping arrangement for movement between positions in which (1) the liquid entering said tubular piping arrangement flows substantially entirely through said porous barrier and said container to force said object or objects through said piping arrangement, and (2) the liquid leaving said tubular piping arrangement flows into said container and then through said by-pass conduit means and said check valve means.
Claim 2
Dependent Claim
206 words
In a fluid-flow system comprising a tubular piping arrangement having reversing valve means for reversing the direction of flow of fluid through the piping arrangement, one or more resiliently compressible objects movable back and forth through said piping arrangement to clean same, and retaining means adapted to retain said object or objects at the ends of the travel thereof through said piping arrangement, the improvement in which said retaining means comprises a container which is open at one end for receiving said objects from or directing said objects into said tubular piping arrangement and which is blocked at its opposite end by a porous barrier; by-pass conduit means connected in parallel with said container for by-passing liquid around said container; and check valve means coupled to the blocked end of the container and which is responsive to the direction of flow of liquid through said piping arrangement for movement between positions in which (1) the liquid entering said tubular piping arrangement flows substantially entirely through said porous barrier and said container to force said object or objects through said piping arrangement, and (2) the liquid leaving said tubular piping arrangement flows into said container and then through said by-pass conduit means and said check valve means.
Claim 3
Dependent Claim
19 words
A fluid-flow system according to claim 1 in which said tubular piping arrangement comprises a tubular semipermeable membrane module.
Claim 4
Dependent Claim
24 words
A fluid-flow system according to claim 1 in which there are two retaining means respectively connected to opposite ends of said tubular piping arrangement.
Claim 5
Dependent Claim
58 words
A fluid-flow system according to claim 3, including a housing surrounding and radially spaced from said container with the space therebetween defining said by-pass conduit means, said housing having a first opening at one end thereof connected to said tubular piping arrangement and having a second opening at the other end thereof connected to said reversing valve means.
Claim 6
Dependent Claim
64 words
A fluid-flow system according to claim 4, in which said check valve means is disposed within said housing between said second opening of said housing and said porous barrier, said by-pass conduit means having one end in open communication with said first opening and having its other end extending beyond said porous barrier for communication through said check valve means with said second opening.
Claim 7
Dependent Claim
37 words
A fluid-flow system according to claim 5, in which said check valve is a slideable sleeve valve movable between positions opening and closing communication between said other end of said by-pass conduit means and said second opening.
Claim 8
Dependent Claim
69 words
A fluid-flow system according to claim 6, including a tube extending from said porous barrier across said other end of said by-pass conduit means, said tube having opening means therethrough, said sleeve valve being slideable axially inside said tube between positions opening and closing said opening means, said sleeve valve having a divider extending across the interior thereof for being acted on by the fluid flowing through the system.
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) | 1978-05-12 | 1978-11-11 | 1979-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-12 | 1982-11-11 | 1983-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-12 | 1986-11-11 | 1987-05-13 | $7700.00 | Window Closed / Lapsed |