Playing surface for athletic games
AssigneeMOD-SOD Sport Surfaces
InventorFrederick T. Haas, Jr.
Life of this patent
Estimating the term…
Abstract
A playing surface for athletic games, such as tennis, comprising a flat, firm subsurface, a pile fabric disposed on the subsurface comprising a relatively flexible, moisture-impermeable backing and normally generally upstanding pile elements resembling grass, a compacted layer of granular mineral material disposed among the pile elements on the backing to a depth from about 75% to substantially equal to the length of the pile elements, the mineral layer comprising less than 10% clay and further comprising a quantity of moisture retaining material sufficient to maintain the moisture content of the mineral layer above about 3% by weight under normal climatic conditions.
Claims10
A playing surface for athletic games comprising:
- a. a substantially flat, firm subsurface;
- b. a pile fabric disposed on said subsurface comprising a relatively flexible, substantially moisture-impermeable backing and normally generally upstanding pile elements resembling grass;
- the length of said pile elements lying in the range from about 1/2 to about 11/2 inches;
- c. A compacted layer of weather-resistant, mineral, granular material disposed among said pile elements on said backing;
- the depth of said granular material layer lying in the range from about 75% to substantially equal to the length of said pile elements and being substantially uniform over the entire area of said playing surface;
- d. said mineral material comprising less than 10% clay and further comprising a quantity of moisture retaining material sufficient to maintain the moisture content of said mineral material above about 3% by weight under normal climatic conditions.
Dependencies are inferred from the claim text.