Concrete pipe reinforcement spacer bar process

Details Concrete pipe reinforcement spacer bar process Concrete pipe reinforcement spacer bar process

1979-07-11

1981-06-02

Lazarus, Richard B.

Wireworking

Article making or forming

Forms and frames

140107, 140111, B21F 1506, B21F 1700

Patent

active

042705835

ABSTRACT:
The specification discloses a method and related apparatus and cage assembly for spacing inner and outer concrete pipe reinforcing welded wire cages from one another through the use of a unique spacer bar. The spacer bar includes a plurality of links, each having a hook-shaped deviation therein, joined by a tie rod. The links are inserted through one of two cages until the tie rod abuts the cage and the hook deviations are then hooked over a longitudinal or circumferential wire or both in the other cage. Each link also includes at least one form spacer projection projecting from one end thereof in order to space the entire inner and outer cage assembly from the inner and/or outer wall of a pipe form.

REFERENCES:
patent: 3440792 (1969-04-01), Schmidgall
patent: 3837370 (1974-09-01), Gates et al.
patent: 3840054 (1974-10-01), Tolliver
patent: 4184520 (1980-01-01), Tolliver

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