Fragmented slab lifting apparatus and method

(10) US 8,591,143 BI
(22) May 10, 2013
(45) Nov. 26, 2013
(71) Ronald A. Knapp, Bonita Springs, FL (US)
(57) A slab jack assembly for raising a fragmented slab from between sections of a concrete slab from which the fragmented slab is cut comprises a planar support positionable on top of the fragmented slab. Jacks are mounted on opposite sides of the planar support to engage an upper surface of the concrete slab. Securement pins mounted on the planar support are insertable into holes bored in the plurality of fragments in the fragmented slab and expandable within the holes to secure the fragments...

Related articles:

Issue 2019-07

Slab lifting clamp

(10) US 2019/0144245 Al (22) 13.11.2018 (43) 16.05.2019 (57) A disclosed gripping system for lifting planar objects com­prises a back plate, center sliding plate, lifting pin assembly and cam plate...

Issue 2019-02

Connection and alignment of building elements

(11) EP 3 409 854 A1 (22) 04.06.2018 (43) 05.12.2018 (57) A linkage assembly enables an interior building element, such as a concrete slab or wooden joist, to be connected to and aligned with an...

Issue 2013-09

Lightweight slab or similar structural element which can receive equipment that is accessible and that can extend through the slab

(10) US 2013/0160385 A1 (22) Jun.24,2011 (43) Jun. 27, 2013 (76) Alberto Alarcon Garcia, Madrid (ES) (57) A lightweight slab including two main parallel reticular reinforcements (5) (6) separated by...

Issue 2015-02 New structural frameworks

An inflatable concrete dome

It is very expensive to use currently available construction methods to build free-form concrete shells. As a result, many designs are not implemented due to shortage of funds, but replaced with...

Issue 2021-11

Method for modifying concrete slab on subsided ground

(10) US2021222446 (A1) (22) 22.07.2021 (43) 31.05.2017 (57) An object of the present invention is to provide a method for accurately modifying a concrete slab on subsided ground by injecting an...