Lifting and jacking apparatus

Patent metadata

Field	Value
Publication number	US-10752472-B2
Application number	US-201816052275-A
Country	US
Kind code	B2
Filing date	Aug 1, 2018
Priority date	Aug 9, 2017
Publication date	Aug 25, 2020
Grant date	Aug 25, 2020

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.

First claim

The invention is claimed as follows:

1. 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.

2. The void former of claim 1 , wherein the jacking screw includes a lower end rotatable in an opening in the jacking plate.

3. The void former of claim 1 , wherein the jacking screw defines a drive tool receiving chamber.

4. The void former of claim 1 , wherein the breakable flange is engagable by the jacking screw when the jacking screw, the lower housing, the jacking plate, and the connecting plate are held together by a fastener.

5. The void former of claim 1 , wherein a rotation of the jacking screw relative to the lower housing is configured to cause the breakable flange to break.

6. The void former of claim 1 , which includes a seal plate positionable between the jacking plate and the connecting plate.

7. The void former of claim 1 , which includes a removable cap removably attachable to the upper housing.

8. The void former of claim 1 , which includes a fastener connectable to the jacking plate to secure the jacking screw, the lower housing, the jacking plate, and the connecting plate together for embedding in the concrete slab.

Assignees

• Illinois Tool Works
• Wnl Concrete Products Llc

Inventors

• Connell Robert Urquhart
• Mcghee Jr Loyd E
• Brown Rodney

Classifications

• E04C2002/002

  Panels with integrated lifting means, e.g. with hoisting lugs · CPC title

• E04C2/044

  of concrete (E04C2/049 takes precedence) · CPC title

• B66C1/666 Primary

  for connection to anchor inserts embedded in concrete structures · CPC title

• E04G15/04

  Cores for anchor holes or the like {around anchors embedded in the concrete (means in or on the building element for connecting to handling apparatus E04G21/142)} · CPC title

• E04B1/4121

  with internal threads or non-adjustable captive nuts · CPC title