GB2257378B - An improved drainage assembly - Google Patents

An improved drainage assembly

Info

Publication number
GB2257378B
GB2257378B GB9214711A GB9214711A GB2257378B GB 2257378 B GB2257378 B GB 2257378B GB 9214711 A GB9214711 A GB 9214711A GB 9214711 A GB9214711 A GB 9214711A GB 2257378 B GB2257378 B GB 2257378B
Authority
GB
United Kingdom
Prior art keywords
drainage assembly
improved drainage
improved
assembly
drainage
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
GB9214711A
Other versions
GB2257378A (en
GB9214711D0 (en
Inventor
Mark Peter Nigel Fisher
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of GB9214711D0 publication Critical patent/GB9214711D0/en
Publication of GB2257378A publication Critical patent/GB2257378A/en
Application granted granted Critical
Publication of GB2257378B publication Critical patent/GB2257378B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D24/00—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof
    • B01D24/02—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof with the filter bed stationary during the filtration
    • B01D24/20—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof with the filter bed stationary during the filtration the filtering material being provided in an open container
    • B01D24/24—Downward filtration, the container having distribution or collection headers or pervious conduits
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D24/00—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof
    • B01D24/46—Regenerating the filtering material in the filter
    • B01D24/4631—Counter-current flushing, e.g. by air
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/10—Filtration under gravity in large open drainage basins

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Farming Of Fish And Shellfish (AREA)
GB9214711A 1991-07-10 1992-07-10 An improved drainage assembly Expired - Fee Related GB2257378B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB919114928A GB9114928D0 (en) 1991-07-10 1991-07-10 An improved water filter

Publications (3)

Publication Number Publication Date
GB9214711D0 GB9214711D0 (en) 1992-08-19
GB2257378A GB2257378A (en) 1993-01-13
GB2257378B true GB2257378B (en) 1995-06-28

Family

ID=10698155

Family Applications (2)

Application Number Title Priority Date Filing Date
GB919114928A Pending GB9114928D0 (en) 1991-07-10 1991-07-10 An improved water filter
GB9214711A Expired - Fee Related GB2257378B (en) 1991-07-10 1992-07-10 An improved drainage assembly

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB919114928A Pending GB9114928D0 (en) 1991-07-10 1991-07-10 An improved water filter

Country Status (1)

Country Link
GB (2) GB9114928D0 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2348829B (en) * 1999-03-12 2003-08-20 Mark Peter Nigel Fisher Water recirculating apparatus

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1047500A (en) *
US3625365A (en) * 1969-06-25 1971-12-07 Jacuzzi Bros Inc Underdrain assembly for pool-type filter
US4536287A (en) * 1984-04-18 1985-08-20 Himsley Engineering Limited Piping for use in liquid collection and distribution

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1047500A (en) *
US3625365A (en) * 1969-06-25 1971-12-07 Jacuzzi Bros Inc Underdrain assembly for pool-type filter
US4536287A (en) * 1984-04-18 1985-08-20 Himsley Engineering Limited Piping for use in liquid collection and distribution

Also Published As

Publication number Publication date
GB9114928D0 (en) 1991-08-28
GB2257378A (en) 1993-01-13
GB9214711D0 (en) 1992-08-19

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19960710