us3022713a prestressed concrete structures google patents

specializing in the production of large, medium and small concrete mixers, concrete mixing stations, stabilized soil mixing stations and other equipment. It is a heavy industry enterprise integrating R & production and sales.

US3022713A - Prestressed concrete structures - Google Patents

3,922,713 PRESTRESSED CGNQREE STRUCTURES Bengt F. Friberg, 915 iive, St. Louis, Mo. Filed Nov. 26, 1954, Ser. No. 471,431 8 Claims. (Cl. 94-24) This invention relates to prestressed concrete structures, and more particularly to prestressed concrete structures of the class having reinforcing members encased in concrete poured in place around the reinforcing members, the latter being tensioned ...

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US2590685A - Prestressed concrete structure - Google Patents

Prestressed concrete structures US2940295A (en) * 1955-03-07: 1960-06-14: David C Post: Building wall structure and means and method of fabricating same US2971295A (en) * 1955-03-21: 1961-02-14: Phillips Petroleum Co: Prestressed concrete units and structures US2950517A (en) *

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US5509759A - Prestressed concrete piling - Google Patents

A round , prestressed concrete pile having front and back flat portions and a method and apparatus for manufacturing the piles. The apparatus comprises essentially a plurality of horizontally placed piling molds and a concrete feeder and spreader. The concrete feeder and spreader are pulled across the pile molds by a spreader driver attached to a first end of the pile molds and the piles are ...

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US3072994A - Google Search

US3072994A - Apparatus for making post-stressed reinforced cement-concrete structures - Google Patents Apparatus for making post-stressed reinforced cement-concrete structures Download PDF Info Publication number ... 239000011513 prestressed concrete Substances 0.000 description 1;

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US3182109A - Method of making prestressed concrete ...

US3182109A US217711A US21771162A US3182109A US 3182109 A US3182109 A US 3182109A US 217711 A US217711 A US 217711A US 21771162 A US21771162 A US 21771162A US 3182109 A US3182109 A US 3182109A Authority US United States Prior art keywords tendons slab forms concrete starting Prior art date 1962-08-17 Legal status (The legal status is an assumption and is not a legal conclusion.

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US3869530A - Method of constructing a prestressed concrete ...

Tendons for prestressed concrete structures and method of using such tendons US5237793A (en) * 1987-05-01: 1993-08-24: The Crom Corporation: Elongated prestressed concrete tank and method of constructing same US5066167A (en) * 1990-01-19: 1991-11-19: Vsl International

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US3422501A - patents.google

end anchorage for prestressing steel strands for use in prestressed concrete struct filed feb. 15, 1966 ures sheet 3 of 4 3,422,501 end anchorage for prestressing steel strands for use j n- 2 1969 kimio yoshimura in prestressed concrete structures sheet filed feb. 15, 1966 united states patent end anchorage for prestressing steel strands for use in prestressed con- crete structures kimio ...

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US2695754A - Railway track sleeper - Google Patents

Method of making post-stressed reinforced cement-concrete structures US2970406A (en) * 1955-06-15: 1961-02-07: Dyckerhoff Widmann Ag: Anchorages of rod shaped tie members of prestressed concrete US3022713A (en) * 1954-11-26: 1962-02-27: Bengt F Friberg: Prestressed concrete structures US3066581A (en) *

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A Historical Review of Prestressed Concrete through Patents

Oct 01, 2005  Prestressed concrete is a relatively young form of construction in the UnitedStates. The development of the various types of prestressing materials, includinganchorages was critical to the success of prestressed concrete as we know it today.This paper reviews the history of prestressed concrete with a focus on post-tensioningrelated patents in ...

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An approach to patents of prestressed concrete in 20th ...

An approach to patents of prestressed concrete in 20th Century’s architecture. In: Cruz, P. ed. Structures and architecture: concepts, applications and challenges. Proceedings of the Second International Conference on Structures and Architecture, Guimaraes, Portugal, 24-26 July 2013.

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