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US 10,752,472 B2Granted
Lifting and jacking apparatus
AssigneeIllinois Tool Works Inc.
InventorsRobert Urquhart Connell, Loyd E. McGhee, Jr., Rodney Brown
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Abstract
A lifting and jacking apparatus including a void former configured for embedment in a concrete slab before pouring of the concrete slab and a lifting bail removably insertable in and securely attachable to the void former. The void former includes a built in jacking screw configured to assist in adjusting the height of the concrete slab.
Claims8
A void former configured for embedment in a concrete slab, said void former comprising:
- a jacking plate;
- a connecting plate including a body having a threaded inner surface defining a jacking screw channel;
- a jacking screw threadably rotatable in the jacking screw channel;
- a lower housing;
- a breakable flange extending inward from an inner surface of the lower housing, and offset from a bottom of the lower housing;
- and
- an upper housing connectable to the lower housing and configured to releasably and securely receive a lifting bail.
4 more elements
Dependencies are inferred from the claim text.