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GB1371568A - Hollow formwork elements for producing concrete structures - Google Patents

Hollow formwork elements for producing concrete structures

Info

Publication number
GB1371568A
GB1371568A GB2072772A GB2072772A GB1371568A GB 1371568 A GB1371568 A GB 1371568A GB 2072772 A GB2072772 A GB 2072772A GB 2072772 A GB2072772 A GB 2072772A GB 1371568 A GB1371568 A GB 1371568A
Authority
GB
United Kingdom
Prior art keywords
tubes
skin
formwork
cavities
valves
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
Application number
GB2072772A
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.)
Semperit AG Holding
Original Assignee
Semperit AG Holding
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
Priority claimed from AT392871A external-priority patent/AT312899B/en
Priority claimed from AT25372A external-priority patent/AT320946B/en
Application filed by Semperit AG Holding filed Critical Semperit AG Holding
Publication of GB1371568A publication Critical patent/GB1371568A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G11/00—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs
    • E04G11/04—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs for structures of spherical, spheroid or similar shape, or for cupola structures of circular or polygonal horizontal or vertical section; Inflatable forms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B21/00—Methods or machines specially adapted for the production of tubular articles
    • B28B21/86—Cores
    • B28B21/88—Cores adjustable, collapsible or expansible
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B7/00—Moulds; Cores; Mandrels
    • B28B7/28—Cores; Mandrels
    • B28B7/30—Cores; Mandrels adjustable, collapsible, or expanding
    • B28B7/32—Cores; Mandrels adjustable, collapsible, or expanding inflatable
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G11/00—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs
    • E04G11/04—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs for structures of spherical, spheroid or similar shape, or for cupola structures of circular or polygonal horizontal or vertical section; Inflatable forms
    • E04G11/045—Inflatable forms

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Architecture (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Moulds, Cores, Or Mandrels (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)

Abstract

1371568 Inflatable formwork for concrete pipes SEMPERIT AG 4 May 1972 [5 May 1971 13 Jan 1972] 20727/72 Heading E1S An inflatable formwork for the interior of concrete pipes &c comprises a hollow member of elastic material having a skin 1 and internal walls attached thereto which define at least three cavities extending substantially the full length of the member, valves 9, 10 being provided in the end or ends of the member for inflation of the respective cavities by filling with a gaseous or liquid medium, and selected cavities communicating through openings so that they may be filled through a common valve. The formwork is preferably of ovoid cross-section and contains two circular tubes 6, 8 of different diameter within the skin 1, which tubes are joined at a common tangent or chord, and communicate through openings 13. Either complete tubes may be enveloped by and attached to the skin, or wall parts may be bonded to the inside of the skin to form the tubes. The communicating tubes 6, 8 are inflated through the common valve 9, and the remaining spaces 7 through a further valve or valves 10 to a lower pressure than the tubes 6, 8, to achieve the required shape for the skin 1. The formwork may instead contain three circular tubes. In use, the formwork may sit in a U-section base plate to locate it when pouring concrete around it.
GB2072772A 1971-05-05 1972-05-04 Hollow formwork elements for producing concrete structures Expired GB1371568A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT392871A AT312899B (en) 1971-05-05 1971-05-05 Reusable formwork hollow body made of elastic material and filled with a gaseous or liquid medium
AT25372A AT320946B (en) 1972-01-13 1972-01-13 Reusable, hollow shuttering body filled with a gaseous or liquid medium

Publications (1)

Publication Number Publication Date
GB1371568A true GB1371568A (en) 1974-10-23

Family

ID=25592049

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2072772A Expired GB1371568A (en) 1971-05-05 1972-05-04 Hollow formwork elements for producing concrete structures

Country Status (7)

Country Link
CH (1) CH544636A (en)
DE (1) DE2221653A1 (en)
FR (1) FR2135668B1 (en)
GB (1) GB1371568A (en)
HU (1) HU168860B (en)
IT (1) IT955238B (en)
NL (1) NL7205985A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2923016A1 (en) * 1979-06-07 1980-12-18 Ruhrkohle Ag Flexible mine cavity filling sheath - is force and/or form locked to adjacent sheaths and support wall
EP0024157A1 (en) * 1979-08-09 1981-02-25 Johnston Construction Limited Method of lining or relining tunnels and tunnels lined or relined by such a method
GB2188689A (en) * 1986-04-05 1987-10-07 Owen Gregory Gallagher Inflatable pipe shutter
WO2014163511A1 (en) * 2013-04-05 2014-10-09 Lake Products Limited An inflatable cavity fill or cavity forming member

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105604317B (en) * 2016-02-24 2018-02-06 广东省建筑设计研究院 A kind of thin-walled square chest hollow floor core and its anti-float method

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2923016A1 (en) * 1979-06-07 1980-12-18 Ruhrkohle Ag Flexible mine cavity filling sheath - is force and/or form locked to adjacent sheaths and support wall
EP0024157A1 (en) * 1979-08-09 1981-02-25 Johnston Construction Limited Method of lining or relining tunnels and tunnels lined or relined by such a method
GB2188689A (en) * 1986-04-05 1987-10-07 Owen Gregory Gallagher Inflatable pipe shutter
WO2014163511A1 (en) * 2013-04-05 2014-10-09 Lake Products Limited An inflatable cavity fill or cavity forming member
AU2014250137B2 (en) * 2013-04-05 2017-07-20 Lake Products Limited An inflatable cavity fill or cavity forming member
US10197194B2 (en) 2013-04-05 2019-02-05 Lake Products Limited Inflatable cavity fill or cavity forming member

Also Published As

Publication number Publication date
CH544636A (en) 1973-11-30
HU168860B (en) 1976-07-28
FR2135668A1 (en) 1972-12-22
IT955238B (en) 1973-09-29
FR2135668B1 (en) 1973-07-13
DE2221653A1 (en) 1972-11-23
NL7205985A (en) 1972-11-07

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Legal Events

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