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US 4,792,133 AGranted
Substitute ground surface material
AssigneeEn-tout-cas plc
InventorsPaul Hawkins, John D. Dachtler
Life of this patent
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AssigneeEn-tout-cas plc
InventorsPaul Hawkins, John D. Dachtler
Estimating the term…
The invention relates to a substitute soil material for laying as a sports surface for example a horse-race track. The material may be a sand or other fine granular material with a binder comprising a polymeric material dispersed or dissolved in an oil which preferably is a soft grease at ordinary climatic temperatures. When laid, the surface may be maintained by periodic raking. Suitable polymeric materials are e.v.a. polystyrene, nylon or p.v.c.
Substitute ground surface material comprising sand or other particulate or granular mineral material treated with a binder comprising synthetic polymeric material dispersed or dissolved in a compound selected from the group consisting of latices, alginates, molasses and combinations thereof, said compound having a viscosity such that it is substantially non-fluid at ambient temperatures so as to produce an inert, discrete material permanently capable of being raked when laid in a layer upon a substrate.
Substitute ground surface material comprising sand or other particulate or granular mineral material treated with a binder comprising synthetic polymeric material dispersed or dissolved in an oil, said oil having a viscosity such that it is substantially non-fluid at ambient temperatures so as to produce an inert, discrete material permanently capable of being raked when laid in a layer upon a substrate, wherein said oil is a bitumen or gas oil.
Substitute ground surface material comprising sand or other particulate or granular mineral material treated with a binder comprising synthetic polymeric material dispersed or dissolved in an oil, said oil having a viscosity such that it is substantially non-fuild at ambient temperatures so as to produce an inert, discrete material permanently capable of being raked when laid in a layer upon a substrate wherein said oil is a siliconized oil.
Substitute ground surface material comprising sand or other particulate or granular mineral material treated with a binder comprising synthetic polymeric material dispersed or dissolved in an oil, said oil having a viscosity such that it is substantially non-fluid at ambient temperatures so as to produce an inert, discrete material permanently capable of being raked when laid in a layer upon a substrate, wherein said polymeric material is ethylene vinyl acetate.
Substitute ground surface material comprising sand or other particulate or granular mineral material treated with a binder comprising synthetic polymeric material dispersed or dissolved in an oil, said oil having a viscosity such that it is substantially non-fluid at ambient temperatures so as to produce an inert, discrete material permanently capable of being raked when laid in a layer upon a substrate wherein said polymeric material is polyvinyl chloride.
Substitute ground surface material comprising sand or other particulate or granular mineral material treated with a binder comprising synthetic polymeric material dispersed or dissolved in an oil, said oil having a viscosity such that it is substantially non-fluid at ambient temperatures so as to produce an inert, discrete material permanently capable of beng raked when laid in a layer upon a substrate wherein coloring pigments are added to said ground surface material.
A recreational or sports area having a surface formed of a substitute ground surface material comprising sand or other particulate or granular mineral material treated with a binder comprising synthetic polymeric material selected from the group consisting of ethylene vinyl acetate, polystyrene, nylon, polypropylene and polyvinyl chloride, dispersed or dissolved in an oil or similar compound selected from the group consisting of latices, alginates, molasses and combinations thereof, said oil or similar compound having a viscosity such that it is substantially non-fluid at ambient temperatures so as to produce an inert, discrete material permanently capable of being raked when laid in a layer upon a substrate, wherein said material is laid in a layer upon a substrate.
Dependencies are inferred from the claim text.
No related US applications are recorded in the indexed filing history.
Containing organic compounds only: prepolymers; Macromolecular compounds
Soil-conditioning materials or soil-stabilising materials: containing mixtures of inorganic and organic compounds
Coherent pavings made in situ: made of road-metal and binders
Coherent pavings made in situ: by subjecting soil to stabilisation
Term ended 8 Dec 2006 (estimated)
USPTO file history isn’t available for this patent, so only indexed dates are shown.
The invention relates to ground surfaces and substitute soil material for use in forming the same. More particularly but not exclusively, it relates to treated particulate material adapted to be laid in defined areas so as to form recreational ground surfaces.
Recreational ground surfaces should ideally be little affected by weather or by wear and should offer a durable, resilient superstrate having consistent properties throughout its area. Where such ground surfaces, for example a horse rack track, comprises turf the turf may become slippery when wet, hard and crumbly in drought conditions and unsuitable for use at all in icy conditions or during and after heavy rainfall. Inconsistencies arise in the properties of the track due to the formation of divots thrown up by hooves, uneven treatment by rollers, differences in soil types or various densities of the subsoil beneath the turf.
Alternatively, race tracks or other recreational surfaces may be of the kind known as dirt-tracks comprising sand bound by clay compost or other binder, but such surfaces are adversely affected by rain, very dirty in use and require considerable maintenance. In attempts to improve the resilience characteristics of track, it may for example be decided to incorporate wood chippings which will be found quickly to deteriorate in use and eventually to rot.