Pre-stressing of concrete pressure vessels

Winding – tensioning – or guiding – Coil holder or support – Spool or core

Patent

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Details

B65H 8106

Patent

active

041217802

ABSTRACT:
A temporary platform encircling a concrete pressure vessel carries endless rails on which a mobile unit runs. The unit has a supply drum from which is drawn pre-stressing wire anchored at its free end in one of many channels in the outside wall of the vessel. The wire leaves the unit via a tensioning unit and a payout sheave both carried by the mobile unit. Hoist ropes fixed at intervals around the platform and connected to winches lift and lower the platform to locate the sheave at the level of each channel in turn.

REFERENCES:
patent: 2321465 (1943-06-01), Crom
patent: 2364696 (1944-12-01), Crom
patent: 2520402 (1950-08-01), Hirsch
patent: 2711291 (1955-06-01), Kennedy
patent: 2797878 (1957-07-01), Crom, Jr.
patent: 3065893 (1962-11-01), Basford
patent: 3104791 (1963-09-01), Anrig
patent: 3255976 (1966-06-01), Mede
patent: 3380675 (1968-04-01), Baxter et al.
patent: 3452940 (1969-07-01), Brandestini
patent: 3773270 (1973-11-01), Brandestini

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