Device for tensioning a reinforcing strand
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United States of America Patent
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Mar 15, 1983
Grant Date -
N/A
app pub date -
Nov 16, 1979
filing date -
Mar 31, 1978
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A device for tensioning reinforcing strands in concrete structures comprises a cylinder and a cooperating piston and is provided with means for supplying a pressure gas obtained by the combustion of powder 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, at which the combustion occurs, the device being provided with means for permitting, at will, the gas from the accumulator to act upon the piston.
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