초록 ▼

A fluid flows control apparatus includes an elongate stocking having a flexible cylindrical sidewall. The sidewall has plural apertures of a shape and placement in the sidewall as to cover a majority of the surface area and to enable the sidewall to expand radially in preference to axial extension.

A fluid flows control apparatus includes an elongate stocking having a flexible cylindrical sidewall. The sidewall has plural apertures of a shape and placement in the sidewall as to cover a majority of the surface area and to enable the sidewall to expand radially in preference to axial extension. The stocking is filled with a filter media that may also be chemically or biologically reactive or expansive upon absorption of water.

대표청구항 ▼

What is claimed is: 1. An erosion control apparatus comprising an elongate stocking having a flexible cylindrical sidewall defining a sidewall surface area, the sidewall having plural apertures of a shape and placement in the sidewall as to cover a majority of the surface area and to enable the sid

What is claimed is: 1. An erosion control apparatus comprising an elongate stocking having a flexible cylindrical sidewall defining a sidewall surface area, the sidewall having plural apertures of a shape and placement in the sidewall as to cover a majority of the surface area and to enable the sidewall to expand radially in preference to axial extension; wherein each of the apertures is oval in shape and oriented longitudinally with a long axis aligned axially with the stocking; and a fill material contained within the stocking, wherein the apertures are misaligned circumferentially. 2. The apparatus of claim 1 wherein the fill material is a fractured material. 3. The apparatus of claim 2 wherein the fractured material is walnut shells. 4. The apparatus of claim 1 wherein the fill material is highly absorbent. 5. The apparatus of claim 4 wherein the fill material is plastic and expands upon absorption of a liquid. 6. The apparatus of claim 1 wherein the fill material is coated with a chemical capable of chemical reaction with at least one component in a fluid passing through the fill material. 7. The apparatus of claim 1 wherein the apertures are oval shaped, each of the apertures having a long axis aligned axially with the stocking. 8. The apparatus of claim 7 wherein to apertures are arranged in axially aligned rows. 9. An erosion control method comprising the steps of: placing an elongate stocking filled with a fill material on a surface in the path of a fluid runoff; forming plural, axially oriented, oval shaped apertures in a flexible cylindrical sidewall of the stocking; such that the stocking expands radially in preference to axial extension and further comprising the step of misaligning the apertures circumferentially. 10. The method of claim 9 further comprising the step of fracturing the fill material. 11. The method of claim 9 further comprising the step of selecting a fill material that is highly absorbent. 12. The method of claim 9 further comprising to step of selecting a fill material that is plastic and expands upon absorption of a liquid. 13. The method of claim 9 further comprising the step of coating the fill material with a chemical capable of chemical reaction with at least one component in a fluid passing through the fill material. 14. The method of claim 9 further comprising the step of shaping the apertures as ovals and aligning a long axis of the apertures axially with the stocking. 15. The method of claim 9 further comprising the step of aligning the apertures in axially aligned rows.