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US4214992A Expired / Lapsed US ⏱️ 0.0 years remaining

Water collecting and distributing apparatus disposed in a lower portion of high speed filter basin

Assignee: Mitsui Engineering and Shipbuilding Co Ltd
•
Filing: 1978-08-07
•
Granted: 1980-07-29
•
Expires: 1998-08-07
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Abstract

Abstract A water collecting and distributing apparatus capable of collecting filtrate, distributing raw water, supplying back wash water and dispersing scouring air, which is disposed in a lower portion of a high speed filter basin, is disclosed. This apparatus comprises a plurality of blocks regularly arranged in the bottom portion of the filter basin, each block having a flow passage for air and water in the central portion thereof and a water dispersing chamber located adjacent to the flow passage. A communication hole is formed in a partition wall between the flow passage and the water dispersing chamber, and an injection hole is formed in each of the top wall of the flow passage and the top wall of the water dispersing chamber. The numbers and diameters of the communication holes and injection holes in the blocks and positions of these holes are arranged so that a certain relation is established among them. In each block, the flow passage is formed to have a trapezoidal sectional shape.

Inventors

  • 👤 Kenji Sasano
  • 👤 Ichiro Shiramasa

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-07 19:12
CPC Classifications
B; B01; B01D; B01D24/00; B01D24/46; B01D24/4631; B01D24/02; B01D24/20; B01D24/24

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 181 words
A water collecting and distributing apparatus to be disposed in a lower portion of a high speed filter basin, said apparatus comprising a plurality of blocks positioned and aligned in the lower portion of the filter basin, a gravel layer formed on the blocks, a filter medium formed on the gravel layer, a water collecting dam for collecting filtrate passing through said blocks, an air introducing means for feeding air to the filter basin through said blocks and a water introducing means for feeding water to the filter basin through said blocks, wherein each said block has a flow passage for air and water formed in the central portion thereof, at least one water dispersing chamber formed adjacent to said flow passage, at least one first communication hole means formed in a partition wall between said flow passage and dispersing chamber, at least one second hole means for jetting air and/or water, formed in the top wall of said flow passage, and at least one third hole means for jetting only water, formed in the top wall of said dispersing chamber.
Claim 2
Dependent Claim 181 words
A water collecting and distributing apparatus to be disposed in a lower portion of a high speed filter basin, said apparatus comprising a plurality of blocks positioned and aligned in the lower portion of the filter basin, a gravel layer formed on the blocks, a filter medium formed on the gravel layer, a water collecting dam for collecting filtrate passing through said blocks, an air introducing means for feeding air to the filter basin through said blocks and a water introducing means for feeding water to the filter basin through said blocks, wherein each said block has a flow passage for air and water formed in the central portion thereof, at least one water dispersing chamber formed adjacent to said flow passage, at least one first communication hole means formed in a partition wall between said flow passage and dispersing chamber, at least one second hole means for jetting air and/or water, formed in the top wall of said flow passage, and at least one third hole means for jetting only water, formed in the top wall of said dispersing chamber.
Claim 3
Dependent Claim 28 words
An apparatus as set forth in claim 1, wherein the air and water flow passage formed in the central portion of each block has a trapezoidal sectional shape.
Claim 4
Dependent Claim 17 words
An apparatus as set forth in claim 1, wherein each block is formed of an anticorrosive substance.
Claim 5
Dependent Claim 17 words
An apparatus as set forth in claim 3, wherein each block is formed of porcelain or plastics.
Claim 6
Dependent Claim 28 words
An apparatus as set forth in claim 1 wherein said at least one dispersing chamber is two dispersing chambers, one positioned on each side of said flow passage.

References Cited (Backward Citations)

US801810A Cited
CH202235A Cited
US2710692A Cited
US3110667A Cited
US3468422A Cited
US3925202A Cited
US4065391A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1983-07-29 1984-01-28 1984-07-29 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1987-07-29 1988-01-28 1988-07-29 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1991-07-29 1992-01-28 1992-07-29 $7700.00 Window Closed / Lapsed

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