GB2490684A - Levelling aid for laying sub-layer of paving - Google Patents

Levelling aid for laying sub-layer of paving Download PDF

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Publication number
GB2490684A
GB2490684A GB201107750A GB201107750A GB2490684A GB 2490684 A GB2490684 A GB 2490684A GB 201107750 A GB201107750 A GB 201107750A GB 201107750 A GB201107750 A GB 201107750A GB 2490684 A GB2490684 A GB 2490684A
Authority
GB
United Kingdom
Prior art keywords
offset
section
paving
layer
slab
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
GB201107750A
Other versions
GB201107750D0 (en
Inventor
Philip Charles Green
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to GB201107750A priority Critical patent/GB2490684A/en
Publication of GB201107750D0 publication Critical patent/GB201107750D0/en
Publication of GB2490684A publication Critical patent/GB2490684A/en
Withdrawn legal-status Critical Current

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Classifications

    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01CCONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C19/00Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
    • E01C19/12Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for distributing granular or liquid materials
    • E01C19/15Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for distributing granular or liquid materials for laying-down uncoated stone or similar materials, or for striking-off or spreading same without compacting, e.g. for crushed rock base courses, sand cushions for paving

Abstract

The levelling aid, primarily for use when preparing a dry sand-cement sub-layer for paving or patio slabs or tiles, comprises an upper portion 1 with a lower surface for engaging a paving slab or the like and an offset portion 2 attached to the upper portion so that the axes of the upper and offset portions are parallel to one another, with a lower surface of the offset section being offset below, in use, the lower surface of the upper portion. The offset is preferably adjustable. The upper section may include a spirit level 1a or digital inclinometer and the device may also include a vibrator. An adjustable foot 1b may protrude from the lower surface of the upper section. The lower surface of the offset section may be provided with uniform open channels with axes at right angles to the longitudinal axes of the upper and offset sections.

Description

Description
This invention is for facilitating the laying of patio or paving slabs. There are a variety of methods for preparing the supporting sub-layer of patio or paving slabs, one very common method is using a dry sand-cement mix for which this device has been developed.
The typical starting point for the laying of a paved area is to decide the height of the upper surface of the area as well as the run-off angle (to direct rainfall to a specific place relative to the paved area). Once this has been established an initial slab (or slabs at each corner of the area to be paved) are laid. Once in position adjacent slabs need to be aid in the same plane as the reference slab(s).
The device simply uses the upper surface of a reference slab to prepare the dry sand-cement mix for the adjacent slab. This is done by slightly overfilling the adjacent area with dry sand-cement mix and then pressing the device down onto the surface of the reference slab the offset of the device pressing down onto the surface of the dry sand-cement mix, by dragging the device across the surface of the reference slab the dry sand-cement mix will be levelled in an offset plane parallel to the reference slab (see figure 1).
In trials with slabs of dimension 450mm x 450mm x 50mm the time in preparing the dry sand-cement mix was reduced to 30-35% of that when preparing with a rake. The overall time reduction was somewhat better than 3QD/0 due to the device providing accurate first time' positioning of each slab.
in greater detail the device (figure 2) comprises two main parts, the upper section (1) which is gripped by hand and the offset section (2), the lower surface of which acts on the dry sand-cement mix to level and compress it. The offset distance (a) could be adjustable for different thickness of slabs or simply fixed to a level which corresponds to a typical slab thickness. This offset distance may be configured to be slightly less than the slab thickness to provide allowance for the compression of the sand cement mix. Alternatively features providing the same allowance for the compression of the dry sand-cement mix would be a series of reliefs in the lower surface of the offset section (2) which in turn creates series of raised features in the dry sand-cement mix (figure 3).
in another embodiment of the invention, section (1) could contain a spirit level (la) for initial setting of the reference slab and continual checking of the run-off angle. A further embodiment may have the offset section (2) as detachable from the upper section (1), where the upper section (1) comprises the main element of the device and a range of detachable offset sections (2) could be supplied depending on the size and thickness of the slabs being laid.
A further additional simple feature is a screw adjusted foot (ib) at the end of the upper section (1) which allows the preparation of the dry sand-cement mix to be prepared at an angle to the plane of the adjacent slab. This is a useful feature when making small corrections or designing into the entire paved surface a water run-off path to an adjacent drain or area with plants. The foot arrangement would retract fully to become flush with the lower surface of the offset section (2), the foot being circular in geometry and attached to the bottom of the screw thread by a ball and socket to allow full articulation. This ensures that the foot can be dragged over the surface of the reference slab with full contact of the bottom of the foot with the surface of the slab (see figure 4.) The screw adjuster (Ib) may additionally require a locking device such a lock nut on the upper surface of the upper section (1) which could lock the adjuster in place.
In use the device works efficiently to level and compact the dry sand-cement mx when moved in small backwards and forwards movements, to provide a measure of automation and consistency of this movement the device may benefit from an integrated vibrator (battery powered or mechanically driven via a wind-up spring).
GB201107750A 2011-05-10 2011-05-10 Levelling aid for laying sub-layer of paving Withdrawn GB2490684A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB201107750A GB2490684A (en) 2011-05-10 2011-05-10 Levelling aid for laying sub-layer of paving

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB201107750A GB2490684A (en) 2011-05-10 2011-05-10 Levelling aid for laying sub-layer of paving

Publications (2)

Publication Number Publication Date
GB201107750D0 GB201107750D0 (en) 2011-06-22
GB2490684A true GB2490684A (en) 2012-11-14

Family

ID=44243861

Family Applications (1)

Application Number Title Priority Date Filing Date
GB201107750A Withdrawn GB2490684A (en) 2011-05-10 2011-05-10 Levelling aid for laying sub-layer of paving

Country Status (1)

Country Link
GB (1) GB2490684A (en)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2102054A (en) * 1981-07-16 1983-01-26 David Capell Mortar or other material flattening device
GB2209044A (en) * 1987-08-06 1989-04-26 Geoffrey Norman Henry Goss Patio slab laying aid
GB2258483A (en) * 1991-07-26 1993-02-10 Greest Products Limited Device for facilitating the laying of paving stones
GB2310236A (en) * 1996-02-15 1997-08-20 Graham Adam Robinson Preparing a screed base to receive paving stones
GB2374103A (en) * 2001-03-15 2002-10-09 Michael Gammell Levelling apparatus for use when laying paving slabs etc.
GB2389614A (en) * 2002-06-15 2003-12-17 Edward Mcginlay Screeding leveller
GB2433284A (en) * 2005-12-14 2007-06-20 Mark John Cutler Levelling tool

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2102054A (en) * 1981-07-16 1983-01-26 David Capell Mortar or other material flattening device
GB2209044A (en) * 1987-08-06 1989-04-26 Geoffrey Norman Henry Goss Patio slab laying aid
GB2258483A (en) * 1991-07-26 1993-02-10 Greest Products Limited Device for facilitating the laying of paving stones
GB2310236A (en) * 1996-02-15 1997-08-20 Graham Adam Robinson Preparing a screed base to receive paving stones
GB2374103A (en) * 2001-03-15 2002-10-09 Michael Gammell Levelling apparatus for use when laying paving slabs etc.
GB2389614A (en) * 2002-06-15 2003-12-17 Edward Mcginlay Screeding leveller
GB2433284A (en) * 2005-12-14 2007-06-20 Mark John Cutler Levelling tool

Also Published As

Publication number Publication date
GB201107750D0 (en) 2011-06-22

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Legal Events

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WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)