Patent US4769551A successfully refreshed from Google Patents.
Patent US5309846A successfully refreshed from Google Patents.
US5309846A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Temporary grass playing field
Assignee: 3 DIMENIONAL SERVICES
•
Filing: 1992-12-31
•
Granted: 1994-05-10
•
Expires: 2012-12-31
Abstract
Abstract A system is disclosed for creating a temporary grass playing field. The system includes a plurality of substantially identical pallets, each pallet having a base with a top surface and a bottom surface. The pallets are polygonal in shape and are adapted to abut against each other to form the playing field. Reinforcing brackets are secured to the bottom surface of the base to elevate the base above a ground support surface by a distance sufficient to enable the fork of a forklift truck to be inserted under the base and the lift the pallet. Grass sod corresponding in shape to the base is then supported on the top surface of the base. This grass forms the temporary grass playing field when the pallets are nested together so that the sides of the pallets abut against each other.
Inventors
- 👤 Douglas L. Peterson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:27
CPC Classifications
E; E01; E01C; E01C13/00; E01C13/08; E01C13/083; E01C2013/006
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
144 words
A system for creating a temporary grass playing field comprising: a plurality of substantially identical pallets, each pallet having a base with a top surface and a bottom surface, each of said pallet bases having a regular hexagonal shape, means secured to said bottom surface of each said pallet base for elevating said pallet base a predetermined distance above a ground support surface, grass sod corresponding in shape to said pallet base supported on said top surface of said pallet base, a sidewall extending upwardly from said top surface of said base, said sidewall extending around substantially the entire outer periphery of said base, means for enabling grass on adjacent pallets to knit together comprising an elongated edge member and means for detachably securing said edge member to an upper edge of said sidewall so that said edge member extends upwardly form said sidewall.
Claim 2
Independent Claim
144 words
A system for creating a temporary grass playing field comprising: a plurality of substantially identical pallets, each pallet having a base with a top surface and a bottom surface, each of said pallet bases having a regular hexagonal shape, means secured to said bottom surface of each said pallet base for elevating said pallet base a predetermined distance above a ground support surface, grass sod corresponding in shape to said pallet base supported on said top surface of said pallet base, a sidewall extending upwardly from said top surface of said base, said sidewall extending around substantially the entire outer periphery of said base, means for enabling grass on adjacent pallets to knit together comprising an elongated edge member and means for detachably securing said edge member to an upper edge of said sidewall so that said edge member extends upwardly form said sidewall.
Claim 3
Dependent Claim
72 words
The invention as defined in claim 1 wherein said means for detachably securing said edge member to said sidewall comprises a plurality of tabs disposed around a bottom of said edge member, said tabs lying in a plane parallel to and spaced from said edge member, said tabs adapted to fit over the top of said sidewall so that a portion of the sidewall is entrapped between said tabs and said sidewall.
Claim 4
Dependent Claim
22 words
The invention as defined in claim 1 wherein said predetermined distance is sufficient to receive the forks of a fork lift truck.
Claim 5
Dependent Claim
18 words
The invention as defined in claim 1 and comprising at least one drainage hole formed through said base.
Claim 6
Dependent Claim
16 words
The invention as defined in claim 1 wherein said base is constructed of corrosion resistant metal.
Claim 7
Dependent Claim
25 words
The invention as defined in claim 1 wherein said elevating means comprises at least one support bracket secured to said bottom surface of said base.
Claim 8
Dependent Claim
13 words
The invention as defined in claim 6 wherein said support bracket is elongated.
References Cited (Backward Citations)
US3107690A
Cited
US3421679A
Cited
GB1208933A
Cited
US3541977A
Cited
US3603273A
Cited
US4007694A
Cited
GB2138690A
Cited
FR2612793A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-05-09 | 1997-11-08 | 1998-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-05-09 | 2001-11-08 | 2002-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-05-09 | 2005-11-08 | 2006-05-10 | $7700.00 | Window Closed / Lapsed |