Patent US2524189A successfully refreshed from Google Patents.
Patent US4556213A successfully refreshed from Google Patents.
US4556213A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reversible playing or performance area
Assignee: Individual
•
Filing: 1983-09-09
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Granted: 1985-12-03
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Expires: 2003-09-09
Abstract
Abstract A reversible playing and/or performing area having at least one reversible tray which has separately utilizable opposing plane surfaces. The tray has a bottom and shallow sides. The outer surface of the bottom of the tray provides a first playing surface. The space of the tray defined by the inner surfaces of the bottom and the sides of the tray holds a bedding material which provides the base for a second, opposing playing surface. Suitable device is provided for rotatably reversing the playing surfaces. The reversible area may have a plurality of abutting trays which may be of different shapes and dimensions.
Inventors
- 👤 Devendra N. Sharma
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:58
CPC Classifications
A; A63; A63C; A63C19/00; A63C19/02; A63G; A63G25/00
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
92 words
A reversible playing or performance area assembly comprising: at least one unit tray having first and second opposing plane surfaces; wherein each unit tray has a bottom and shallow sides, the outer surface of said bottom affording a base for the first of the opposing plane surfaces and wherein a bedding material is located within the space defined by the inner surfaces of the bottom and sides, to afford a base for the second of the opposing plane surfaces and means being provided for rotatably reversing the playing areas of said tray.
Claim 2
Dependent Claim
92 words
A reversible playing or performance area assembly comprising: at least one unit tray having first and second opposing plane surfaces; wherein each unit tray has a bottom and shallow sides, the outer surface of said bottom affording a base for the first of the opposing plane surfaces and wherein a bedding material is located within the space defined by the inner surfaces of the bottom and sides, to afford a base for the second of the opposing plane surfaces and means being provided for rotatably reversing the playing areas of said tray.
Claim 3
Dependent Claim
12 words
The reversible area of claim 1 comprising a plurality of abutting trays.
Claim 4
Dependent Claim
19 words
The reversible area of claim 2 wherein the trays are all polygons of about the same shape and dimensions.
Claim 5
Dependent Claim
21 words
The reversible area of claim 3 wherein the trays are all rectangles arranged in a square or rectangular mosaic grid pattern.
Claim 6
Dependent Claim
24 words
The reversible area of claim 3 wherein the trays are all rectangles arranged in a mosaic grid pattern in which alternate rows are offset.
Claim 7
Dependent Claim
49 words
The reversible area of claim 3 wherein the first plane surface is covered with a synthetic or natural material to afford a first playing or performing area, and wherein the second plane surface is covered with a natural or synthetic grass to afford a second playing or performing area.
Claim 8
Dependent Claim
29 words
The reversible area of claim 6 wherein the bedding and natural or synthetic grass are held within the tray by retaining means attached to the sides of said tray.
Claim 9
Dependent Claim
30 words
The reversible area of claim 7 wherein an electrical heating means is provided within said bedding to prevent the accumulation of ice or snow on either of the opposing surfaces.
Claim 10
Dependent Claim
22 words
The reversible area of claim 8 wherein drain means are provided in said tray for removing rainwater and melted snow or ice.
Claim 11
Dependent Claim
30 words
The reversible area of claim 3 wherein hinge means are located at one side of each said tray, said side forming the axis of rotation when said tray is reversed.
Claim 12
Dependent Claim
29 words
The reversible area of claim 3 wherein hinge means are located along a central axis bisecting each said tray, which tray is reversed by rotating it around said axis.
Claim 13
Dependent Claim
28 words
The reversible area of claim 3 wherein removable linking means are provided for joining together two or more adjacent trays, so that said trays may be reversed simultaneously.
Claim 14
Dependent Claim
22 words
The reversible area of claim 3 wherein powered motive means are provided for reversing each said tray, operatively connected to said tray.
Claim 15
Dependent Claim
22 words
The reversible area of claim 13 wherein the powered motive means comprises a disconnectable internal combustion engine, electric motor, or diesel engine.
Claim 16
Dependent Claim
30 words
The reversible area of claim 13 wherein the powered motive means is a plurality of electric motors, each of which is fixedly operatively connected to at least one said tray.
Claim 17
Dependent Claim
19 words
The reversible area of claim 15 wherein each of said electric motors is connected to a single control unit.
Claim 18
Dependent Claim
16 words
The reversible area of claim 15 wherein said electric motors are powered by solar energy converters.
References Cited (Backward Citations)
US3139283A
Cited
US3157557A
Cited
US3141392A
Cited
US3143350A
Cited
US3529831A
Cited
US3669817A
Cited
US4275887A
Cited
US4365803A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-12-02 | 1989-06-03 | 1989-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-12-02 | 1993-06-03 | 1993-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-12-02 | 1997-06-03 | 1997-12-03 | $7700.00 | Window Closed / Lapsed |