Patent US4913596A successfully refreshed from Google Patents.
US4913596A
Expired / Lapsed
US
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Athletic field construction
Assignee: EROSION CONTROL SYSTEMS Inc A CORP OF
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Filing: 1989-05-04
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Granted: 1990-04-03
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Expires: 2009-05-04
Abstract
Abstract An athletic field in which a subgrade is initially formed with a series of ditches having a series of drain tiles therein exteriorly covered with pea gravel. A layer of pea gravel is mounted over the subgrade including the ditches having drain tile covered with pea gravel. A layer of crushed stone is mounted over the layer of pea gravel. A layer of sand having an infiltration rate of at least 9" per hour is mounted over the layer of crushed stone. A layer of soil mixture having an infiltration rate of between 5" to 9" per hour is mounted over the layer of sand. The layer of soil mixture has a layer of soil reinforcement matting spaced from the upper surface thereof within a two-inch upper strata of the soil mixture layer. The upper surface of the layer of soil mixture has thereon either grass sod, grass sprigs, or grass seed for establishing a grass growth thereon.
Inventors
- 👤 Louis N. Lambert, III
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:18
CPC Classifications
E; E01; E01C; E01C13/00; E01C13/08; E01C13/083
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
164 words
A prepared athletic field or the like comprising a subgrade formed with a series of ditches having a series of drain tiles therein exteriorly covered with pea gravel, a layer of pea gravel in direct contact with the subgrade including the ditches having drain tile covered with pea gravel, a layer of crushed stone over the layer of pea gravel, a layer of sand having an infiltration rate of at least 9" per hour over the layer of crushed stone, a layer of soil mixture having an infiltration rate of between 5 to 9" per hour over the layer of sand, said layer of soil mixture having a layer of soil reinforcement matting spaced from the upper surface thereof within a two-inch upper strata of said soil mixture layer, and means on the upper surface of the layer of soil mixture for establishing a grass growth thereon, said matting serving to prevent the grass from being disrupted by rough athletic use of the like.
Claim 2
Dependent Claim
164 words
A prepared athletic field or the like comprising a subgrade formed with a series of ditches having a series of drain tiles therein exteriorly covered with pea gravel, a layer of pea gravel in direct contact with the subgrade including the ditches having drain tile covered with pea gravel, a layer of crushed stone over the layer of pea gravel, a layer of sand having an infiltration rate of at least 9" per hour over the layer of crushed stone, a layer of soil mixture having an infiltration rate of between 5 to 9" per hour over the layer of sand, said layer of soil mixture having a layer of soil reinforcement matting spaced from the upper surface thereof within a two-inch upper strata of said soil mixture layer, and means on the upper surface of the layer of soil mixture for establishing a grass growth thereon, said matting serving to prevent the grass from being disrupted by rough athletic use of the like.
Claim 3
Dependent Claim
30 words
A prepared athletic field as defined in claim 1 wherein said subgrade is graded and sloped with a crown of approximately 6", each of said ditches being approximately 8" deep.
Claim 4
Dependent Claim
74 words
A prepared athletic field as defined in claim 2 wherein each of said series of drain tiles is generally cylindrical having a diameter of approximately 4", said series of drain tiles being slit along lower portions thereof and being disposed in parallel relation across the athletic field spaced apart approximately twenty feet from one another, said series of drain tiles leading into solid header pipes embedded outside a playing area of the athletic field.
Claim 5
Dependent Claim
31 words
A prepared athletic field as defined in claim 3 wherein said layer of pea gravel is approximately 3" deep, the pea gravel thereof having a diameter of between 1/4" and 3/8".
Claim 6
Dependent Claim
31 words
A prepared athletic field as defined in claim 4 wherein said layer of crushed stone is approximately 3" deep, the crushed stone being of a size approximating number 89 crushed stone.
Claim 7
Dependent Claim
18 words
A prepared athletic field as defined in claim 5 wherein said layer of sand is approximately 6" deep.
Claim 8
Dependent Claim
19 words
A prepared athletic field as defined in claim 6 wherein said layer of soil mixture is approximately 6" deep.
Claim 9
Dependent Claim
47 words
A prepared athletic field as defined in claim 7 wherein said matting comprises a web of open randomly intermeshed thermoplastic monofilaments having fixedly secured interstices, said web being permanently transversely deformed in waffle-like fashion into matting having a thickness substantially greater than the thickness of said web.
Claim 10
Dependent Claim
17 words
A prepared athletic field as defined in claim 8 wherein said grass growth establishing means comprises sod.
Claim 11
Dependent Claim
18 words
A prepared athletic field as defined in claim 8 wherein said grass growth establishing means comprises grass sprigs.
Claim 12
Dependent Claim
18 words
A prepared athletic field as defined in claim 8 wherein said grass growth establishing means comprises grass seeds.
Claim 13
Dependent Claim
74 words
A prepared athletic field as defined in claim 1 wherein each of said series of drain tiles is generally cylindrical having a diameter of approximately 4", said series of drain tiles being slit along lower portions thereof and being disposed in parallel relation across the athletic field spaced apart approximately twenty feet from one another, said series of drain tiles leading into solid header pipes embedded outside a playing area of the athletic field.
Claim 14
Dependent Claim
31 words
A prepared athletic field as defined in claim 1 wherein said layer or pea gravel is approximately 3" deep, the pea gravel thereof having a diameter of between 1/4" and 3/8".
Claim 15
Dependent Claim
31 words
A prepared athletic field as defined in claim 1 wherein said layer of crushed stone is approximately 3" deep, the crushed stone being of a size approximating number 89 crushed stone.
Claim 16
Dependent Claim
18 words
A prepared athletic field as defined in claim 1 wherein said layer of sand is approximately 6" deep.
Claim 17
Dependent Claim
19 words
A prepared athletic field as defined in claim 1 wherein said layer of soil mixture is approximately 6" deep.
Claim 18
Dependent Claim
47 words
A prepared athletic field as defined in claim 1 wherein said matting comprises a web of open randomly intermeshed thermoplastic monofilaments having fixedly secured interstices, said web being permanently transversely deformed in waffle-like fashion into matting having a thickness substantially greater then the thickness of said web.
Claim 19
Dependent Claim
17 words
A prepared athletic field as defined in claim 1 wherein said grass growth establishing means comprises sod.
Claim 20
Dependent Claim
18 words
A prepared athletic field as defined in claim 1 wherein said grass growth establishing means comprises grass sprigs.
Claim 21
Dependent Claim
18 words
A prepared athletic field as defined in claim 1 wherein said grass growth establishing means comprises grass seeds.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-04-02 | 1993-10-02 | 1994-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-04-02 | 1997-10-02 | 1998-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-04-02 | 2001-10-02 | 2002-04-03 | $7700.00 | Window Closed / Lapsed |