US4819933A
Expired / Lapsed
US
⏱️ 0.0 years remaining
All weather surfaces
Assignee: MANSFIELD SAND Co Ltd
•
Filing: 1987-03-27
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Granted: 1989-04-11
•
Expires: 2007-03-27
Abstract
Abstract A surface suitable for equestrian and other use such as ball games is formed using a sand mixture which comprises a selected sand within which is distributed in a homogeneous and randomly oriented manner a relatively small percentage by weight of straight (uncrimped) polymeric fibres, the fibres serving to hold the sand together under the weight of the horses hooves or players feet or other users such as wheeled vehicles or implements.
Inventors
- 👤 Victor J. Armond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 16:24
CPC Classifications
E; E01; E01C; E01C13/00; E01C13/06; E01C13/065; Y; Y10; Y10S; Y10S47/00; Y10S47/09; Y10T; Y10T428/00; Y10T428/23907; Y10T428/23921
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
51 words
An all weather surface for equestrian events or sports events comprising a layer of material laid on top of a prepared drainage base, the material comprising a mixture of sand and synthetic fibres, the fibres being randomly dispersed as separate individual fibres throughout the sand to produce a relatively soft surface.
Claim 2
Dependent Claim
51 words
An all weather surface for equestrian events or sports events comprising a layer of material laid on top of a prepared drainage base, the material comprising a mixture of sand and synthetic fibres, the fibres being randomly dispersed as separate individual fibres throughout the sand to produce a relatively soft surface.
Claim 3
Dependent Claim
37 words
An all weather surface as claimed in claim 1 in which the sand particles are in the range from 100 to 1000 um and the fibres are in the range from 25 to 75 mm in length.
Claim 4
Dependent Claim
20 words
An all weather surface as claimed in claim 2 in which the fibre length is between 35 and 50 mm.
Claim 5
Dependent Claim
32 words
An all weather surface as claimed in Claim 1 in which the layer is between 75 mm and 150 mm and in which the diameter of fibres is 50 to 150 denier.
Claim 6
Dependent Claim
33 words
An all weather surface as claimed in claim 4 in which the preferred diameter is in the region of 100 denier and the depth of layer is in the region of 100 mm.
Claim 7
Dependent Claim
18 words
An all weather surface as claimed in claim 1 in which the fibres are of any polymeric material.
Claim 8
Dependent Claim
26 words
An all weather surface as claimed in claim 6 in which the fibres are polypropylene in an uncrimped form commonly referred to as straight staple fibre.
Claim 9
Dependent Claim
28 words
An all weather surface as claimed in claim 7 in which the percentage of fibre in the mixture is in the region of 0.1 to 0.9% by weight.
Claim 10
Dependent Claim
19 words
An all weather surface as claimed in claim 8 in which the percentage of fibre is 0.45% by weight.
Claim 11
Dependent Claim
24 words
An all weather surface as claimed in claim 8 in which the range of percentage weight of fibre to sand is 0.4 to 0.5%.
Claim 12
Dependent Claim
16 words
An all weather surface as claimed in claim 1 in which the sand is silica sand.
Claim 13
Dependent Claim
21 words
An all weather surface as claimed in claim 1 in which the sand is a sand bonded with water activated clay.
Claim 14
Dependent Claim
23 words
An all weather surface as claimed in claim 1 in which the sand is a sand bonded with an organic liquid activated clay.
Claim 15
Dependent Claim
25 words
An all weather surface as claimed in claim 11 in which the percentage of fibres is in the range from 0.3 to 0.6% by weight.
Claim 16
Dependent Claim
23 words
An all weather surface as claimed in claim 12 in which the percentage of fibres is in the range from 0.2 to 0.5%.
Claim 17
Dependent Claim
25 words
An all weather surface as claimed in claim 13 in which the percentage of fibres is in the range from 0.1 to 0.4% by weight.
Claim 18
Dependent Claim
29 words
An all weather surface as claimed in claim 1 in which the fibres are coloured to conform to the colour of the sand thereby being substantially invisible in use.
Claim 19
Dependent Claim
54 words
A sand mixture for forming an equestrian riding surface the mixture comprising a selected sand containing a small percentage by weight of elongate fibres the fibres being homogenously mixed into the sand in a high intensity mixer and in which the elongate fibres are of a polymeric material and are in an uncrimped form.
Claim 20
Dependent Claim
54 words
A sand mixture for forming an equestrian riding surface the mixture comprising a selected sand containing a small percentage by weight of elongate fibres the fibres being homogenously mixed into the sand in a high intensity mixer and in which the elongate fibres are of a polymeric material and are in an uncrimped form.
Claim 21
Dependent Claim
119 words
An all weather surface for equestrian events or sports events comprising a layer of material laid on top of a prepared drainage base, the material comprising a mixture of sand and polymeric fibres, the fibres being randomly dispersed as separate individual fibres throughout the sand to produce a relatively soft surface; the sand being bonded with liquid activated clay and having particle size of 100 to 1000 um; the fibres being in the range of 25 to 75 mm in length and having a diameter of between 50-150 denier; the percentage of fibres in the mixture being in the region of 0.1 to 0.9% by weights and the depth of said layer of material 75 mm to 150 mm.
Claim 22
Dependent Claim
119 words
An all weather surface for equestrian events or sports events comprising a layer of material laid on top of a prepared drainage base, the material comprising a mixture of sand and polymeric fibres, the fibres being randomly dispersed as separate individual fibres throughout the sand to produce a relatively soft surface; the sand being bonded with liquid activated clay and having particle size of 100 to 1000 um; the fibres being in the range of 25 to 75 mm in length and having a diameter of between 50-150 denier; the percentage of fibres in the mixture being in the region of 0.1 to 0.9% by weights and the depth of said layer of material 75 mm to 150 mm.
Claim 23
Dependent Claim
42 words
An all weather surface as claimed in claim 21 in which the sand is silica and is bonded with an organic liquid activated clay; and said fibres are polypropylene in an uncrimped form and the percentage of fibre is 0.45% by weight.
References Cited (Backward Citations)
US3125294A
Cited
US3091436A
Cited
US3334556A
Cited
US3995079A
Cited
US3797690A
Cited
US4044179A
Cited
US4369054A
Cited
US4389435A
Cited
FR2442809A1
Cited
DD200475A1
Cited
US4396653A
Cited
US4497853A
Cited
US4637942A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-04-10 | 1992-10-10 | 1993-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-10 | 1996-10-10 | 1997-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-10 | 2000-10-10 | 2001-04-11 | $7700.00 | Window Closed / Lapsed |