U.S. patent application number 11/728298 was filed with the patent office on 2008-10-02 for floor slab support system.
This patent application is currently assigned to Dry Basement, Inc.. Invention is credited to Lowell L. Hickman.
Application Number | 20080236061 11/728298 |
Document ID | / |
Family ID | 39791933 |
Filed Date | 2008-10-02 |
United States Patent
Application |
20080236061 |
Kind Code |
A1 |
Hickman; Lowell L. |
October 2, 2008 |
Floor slab support system
Abstract
A floor slab support system for jacking and stabilizing a
sagging or cracked floor or other such slab. Holes of 31/2''
diameter, for example, are drilled through the slab and a pipe pier
driven downwardly until reaching bottom. A connector sleeve
matching the slab hole size is temporarily suspended in the slab
hole and L shaped brackets are inserted into the sleeve and
maneuvered to extend outwardly through slots in the sleeve to
engage the underside of the slab. A threaded rod with a threaded
positioning member and a bottom stop is inserted through the sleeve
and into the pipe pier, and the L brackets extended through the
sleeve and maintained outwardly by the threaded positioning member.
Once in position, the threaded rod is rotated to screw the sleeve
and brackets upwardly to support the slab. Finally, the top of the
rod is cut off and the hole filled with concrete.
Inventors: |
Hickman; Lowell L.;
(Riverside, MO) |
Correspondence
Address: |
Wm Bruce Day;Day Law Firm PC
Suite 300, 4330 Belleview
Kansas City
MO
64111
US
|
Assignee: |
Dry Basement, Inc.
|
Family ID: |
39791933 |
Appl. No.: |
11/728298 |
Filed: |
March 26, 2007 |
Current U.S.
Class: |
52/125.1 |
Current CPC
Class: |
E02D 35/00 20130101;
E04G 23/0288 20130101; E04G 23/02 20130101 |
Class at
Publication: |
52/125.1 |
International
Class: |
E02D 35/00 20060101
E02D035/00 |
Claims
1. A slab support and jacking system comprising: a) a pipe pier
extendable through an opening in said slab; b) a threaded rod
extendible into the pipe pier; c) a connector sleeve adjustably
mounted on said threaded rod and having outwardly extending L
shaped slab supports protruding through said sleeve, the slab
supports adjustably mounted on said threaded rod by a threaded
positioning member.
2. The slab support and jacking system set forth in claim 1
wherein: a) said threaded positioning member has opposite ends with
steps for retaining the L shaped slab supports.
3. The slab support and jacking system set forth in claim 2 wherein
said slab supports extend outwardly of said sleeve through slots in
said sleeve.
4. A slab support and jacking system comprising a pipe pier
extendable downwardly through an opening in said slab, a threaded
rod extendable into the pipe pier and having a slab support
threadably connected thereto for adjustably bearing against the
slab, and the slab support including a sleeve member, a threaded
connector on said rod and having L shaped opposite terminations and
L shaped support arms extendable through slots in the sleeve
member, the opposite terminations of the threaded connector holding
said slab support arms and the threaded rod adjustable to rotate
relative to the connector and move the sleeve and slab support arms
upwardly.
Description
BACKGROUND OF THE INVENTION
[0001] 1. Field of the Invention
[0002] The present invention relates to correcting settlement of
building slabs and more particularly, to structural devices for
such procedures.
[0003] 2. Description of the Prior Art
[0004] Basement walls and slabs have long been jacked up through
hydraulic or screw jacks when settlement has occurred. The jacks
connect to the walls through various bracket means, often a bolted
plate, and the jack left in place. When used for jacking floor,
driveway or other such flat slabs, a hole must be bored through the
concrete and a spreader support of some type placed below slab
level, then the jack extended to lift the slab. The spreader
support has been the subject of development and outwardly expanding
toggle bolts, crossbars, and the like used and all subject to
expense.
SUMMARY OF THE INVENTION
[0005] The present invention consists of a sleeve which fits into a
hole bored in the concrete slab and which has allowance for
brackets to extend outwardly of the sleeve and engage with the
bottom surface of the concrete slab. The brackets are L shaped and
inserted when the sleeve is in position. Next a threaded rod that
has a bottom stop nut and a threaded positioning member is inserted
through the sleeve and rotated so that the positioning member
engages with the L shaped brackets to maintain them in an outwardly
extended position. The rod is screwed snug so that the brackets
engage and lift the slab. Thereafter, the top of the rod can be cut
off and the sleeve cemented in place.
OBJECTS OF THE INVENTION
[0006] The principle objects and advantages of the present
invention are:
[0007] To provide an economical yet sturdy slab support system;
[0008] To provide such a slab support system which is easy to use;
and
[0009] To provide such a slab support system which is well adapted
to the intended purposes.
[0010] Other objects and advantages will become apparent from the
following description including an exemplary embodiment.
BRIEF DESCRIPTION OF THE DRAWINGS
[0011] FIG. 1 is a longitudinal sectional view of a slab support
system embodying the present invention and emplaced within a
concrete slab.
[0012] FIG. 2 is an enlarged elevational view of an interior part
of the slab support system.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
[0013] The reference numeral 1, FIG. 1, generally indicates a slab
support system embodying the present invention. A hole 2 is bored
in a concrete slab 3 and the system 1 sunk into the hole to bear a
portion of the weight of the slab. The holes are bored in a grid
arrangement, for example, every three to four feet on centers. The
diameter of the hole may vary with the weight of the slab to be
supported, but a typical system uses holes drilled 31/2''
diameter.
[0014] A pipe pier 5 is driven downwardly through the bored hole
until the pier bottoms out against hard resistance. Typically the
pier is 16-18 feet long, emplaced by a hydraulic ram and pushed
down until 10,000 psi resistance. The top of the pipe pier 5 ends
inches below the lower surface of the floor slab.
[0015] A sleeve 10 is inserted, as by hand, into the bore 2 and
temporarily retained therein by a L shaped brackets 16 and 18 are
extended by hand through the sidewall slots 12 and 14 of the sleeve
10 so that the bottom leg of the L bracket rests against the
underside of the slab 3.
[0016] To hold the L shaped brackets 16 and 18 in position and lift
the sleeve 10 in support of the slab, a threaded rod 22 is fitted
with a stop, such as a stop nut 24 welded or otherwise affixed
adjacent the rod lower end, but leaving enough rod length to extend
down into the open top of the pipe pier 5. A threaded positioning
member 28, FIG. 2, is threaded to the rod 22, also adjacent its
lower end and upwards of the stop nut 24. The positioning member 24
extends approximately 25/8'' or the inner diameter of the sleeve
10, and is generally of elongate bar form. Opposite ends of the
member 24 terminate in steps 30 and 32 so as to support the L
corner of each L shaped bracket 16 and 18.
[0017] To engage the sleeve and position the L shaped brackets 16
and 18, the threaded rod 22 is extended downwardly through the
sleeve 10 with the positioning member 28 rotated 90 degrees to
avoid interference with the brackets 16 and 18. Once the rod is
fully inserted and the stop nut 24 bears against the top of the
pipe pier 5, the rod is rotated 90 degrees so that the positioning
member contacts and supports the corners of each L shaped bracket
16 and 18, and tightening commenced. Once the rod 22 is tightened
to installers recommended torque, the top exposed end of the rod 22
can be cut off and the sleeve 10 cemented or otherwise covered in
place.
[0018] The brackets 16 and 18 hold the slab supported by the pipe
pier. The brackets are far superior, stronger and less expensive
than toggle bolts, bars, or other such load spreader mechanism.
[0019] It is to be understood that while certain forms of the
invention have been illustrated and described herein, it is not to
be limited to the specific forms or arrangement of parts described
and shown.
* * * * *