Filler plug for coil insert in concrete slab or panel

Details Filler plug for coil insert in concrete slab or panel Filler plug for coil insert in concrete slab or panel

1977-01-21

1978-02-21

Purser, Ernest R.

Static structures (e.g., buildings)

Assembled in situ-type anchor or tie

Socket type

E04B 138

Patent

active

040744990

ABSTRACT:
A plug for temporary use with a coil insert in a concrete product such as a slab or panel comprises a hollow elastomeric body having the outer surface thereof proportioned and threaded for firm matching engagement within the threaded interior surface of the coil with which it is to be used upon predetermined radial contraction and axial elongation from the unstressed condition thereof. The plug is open at one end and closed at the other end, with a stem of smaller diameter projecting from its closed end. The plug is assembled in the coil by means of a rod forced internally against its closed end, causing the plug body to elongate and contract radially sufficiently to be moved axially into place within the coil, and it is removed from the coil by using its stem as a handle for applying pulling force causing sufficient elongation and radial contraction of the plug body for withdrawal from the coil. The outer surface of the elastomeric body may be threaded only adjacent its ends with the intervening surface substantially smooth.

REFERENCES:
patent: 1945707 (1934-02-01), Sharp
patent: 2880608 (1959-04-01), Boll et al.
patent: 3216171 (1965-11-01), Jenkins
patent: 3590538 (1971-07-01), Holt
patent: 3742661 (1973-07-01), Tye

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