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1. (WO1979000856) A DEVICE FOR TENSIONING A REINFORCING STRAND
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1979/000856 International Application No.: PCT/SE1979/000067
Publication Date: 01.11.1979 International Filing Date: 26.03.1979
IPC:
E04G 21/12 (2006.01)
E FIXED CONSTRUCTIONS
04
BUILDING
G
SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR OTHER BUILDING AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
21
Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
12
Mounting of reinforcing inserts; Prestressing
Applicants:
Inventors:
Priority Data:
780364031.03.1978SE
Title (EN) A DEVICE FOR TENSIONING A REINFORCING STRAND
(FR) UN TENDEUR DE TORONS METALLIQUES DE RENFORCEMENT
Abstract:
(EN) A device for tensioning reinforcing strands (11, 52) in concrete structures comprises a cylinder (16, 62) and a cooperating piston (17, 58) and is provided with means (22, 67) for supplying a pressure gas obtained by the combustion of powder (23, 68) or some similar compound. The device may be arranged so either the piston, or the cylinder is movable, and by selecting the size and the composition of the powder charge it will be possible to use the device for an initial tensioning, usually performed in a number of steps, as well as for a final jerk. The device may be provided with an accumulator (15), at which the combustion occurs, the device being provided with means (32, 33) for permitting, at will, the gas from the accumulator to act upon the piston.
(FR) Un tendeur de torons metalliques de renforcement (11, 52) dans des structures en beton comprend un cylindre (16, 62) et un piston correspondant (17, 58) ainsi que des moyens d"alimentation (22, 67) d"un gaz sous pression obtenu par combustion d"une poudre (23, 68) ou autre compose semblable. Dans ce dispositif, soit le cylindre, soit le piston est mobile et, en choisissant la granulometrie et la composition de la poudre de charge, il est possible d"utiliser le tendeur pour effectuer une tension initiale, generalement e plusieurs etapes, ainsi que pour l"a coup final. Le tendeur peut comporter un accumulateur (15) dans le quel se produit la combustion, et des moyens (32, 33) pour permettre au gaz de l"accumulateur d"agir, a volonte, sur le piston.
Designated States:
Publication Language: English (EN)
Filing Language: English (EN)
Also published as:
US4376527DE000002945425DE000002945425GB2037387FR2421254DK501879