US4566558A — Noise barrier

Claim 1

Independent Claim 120 words

A noise barrier panel for the abatement of transportation-related noise comprising a slab of rigid plastic foam secured to and sandwiched between a first sheet of plastic defining a traffic face and a second sheet of plastic defining a residential face, said slab having two major surfaces and minor surfaces with edges at the intersection of said major and minor surfaces, a plurality of reinforcing members secured to said slab at both of said major surfaces, said reinforcing members extending along each of the edges, at least one recess formed into said slab adjacent said first sheet to form a chamber, said recess having a perimeter spaced-apart from said reinforcing members, and a sound absorption material contained in said chamber.

Claim 2

Dependent Claim 120 words

A noise barrier panel for the abatement of transportation-related noise comprising a slab of rigid plastic foam secured to and sandwiched between a first sheet of plastic defining a traffic face and a second sheet of plastic defining a residential face, said slab having two major surfaces and minor surfaces with edges at the intersection of said major and minor surfaces, a plurality of reinforcing members secured to said slab at both of said major surfaces, said reinforcing members extending along each of the edges, at least one recess formed into said slab adjacent said first sheet to form a chamber, said recess having a perimeter spaced-apart from said reinforcing members, and a sound absorption material contained in said chamber.

Claim 3

Dependent Claim 32 words

The panel of claim 1 further comprising reinforcing members secured to said slab at both of said major surfaces which extend across said major surfaces between said reinforcing members along said edges.

Claim 4

Dependent Claim 72 words

The panel of claim 2 wherein said reinforcing members are channel members which have a central strip portion and two side portions attached to and extending generally away from the edges of said strip portion, said channel members being attached to said foam slab with the side portions extending into the interior of said foam slab and with said central strip portion being flush with said major surfaces of said foam slab.

Claim 5

Dependent Claim 21 words

The panel of claim 3 wherein side portions of said channel members are exposed at said minor surfaces along said edges.

Claim 6

Dependent Claim 40 words

The panel of claim 1 further comprising perforations in said first sheet at said chamber with a size and number to provide access for sound into said chamber and for said sheet to protect and contain said sound absorption material.

Claim 7

Dependent Claim 20 words

The panel of claim 5 wherein said perforations provide about a 40% open area in said sheet at said chamber.

Claim 8

Dependent Claim 22 words

The panel of claim 1 wherein said foam slab is a slab of expanded polystyrene having a thickness between about 4-8 inches.

Claim 9

Dependent Claim 22 words

The noise barrier wall of claim 1 wherein said sound absorption material is mineral wool having a density of about 8 lbs./c.f.

Claim 10

Dependent Claim 23 words

The panel of claim 1 wherein said first and second sheets comprise fiberglass reinforced plastic sheets having a thickness of about 0.06 inches.

Claim 11

Dependent Claim 183 words

A noise barrier for the abatement of transportation related noise comprising at least two noise barrier panels, said panels each including a slab of rigid plastic foam secured to and sandwiched between a first sheet of plastic defining a traffic face and a second sheet of plastic defining a residential face, said slab having two major surfaces and minor surfaces with edges at the intersection of said major and minor surfaces, a plurality of reinforcing members secured to both of said major surfaces and extending along each of the edges, a pair of parallel and spaced-apart posts having inwardly facing grooves for receiving said panels in a stacked relationship to form a stack of said panels supported by said posts, said stack having upper and lower edges and at least one intermediate joint, said upper and lower edges being enclosed within channel members having a longitudinal groove for receiving said edges and each of said joints having a joint member having an H-shaped cross-section defining upwardly and downwardly facing grooves for receiving upwardly and downwardly facing edges of said panels at said joint.

Claim 12

Dependent Claim 183 words

A noise barrier for the abatement of transportation related noise comprising at least two noise barrier panels, said panels each including a slab of rigid plastic foam secured to and sandwiched between a first sheet of plastic defining a traffic face and a second sheet of plastic defining a residential face, said slab having two major surfaces and minor surfaces with edges at the intersection of said major and minor surfaces, a plurality of reinforcing members secured to both of said major surfaces and extending along each of the edges, a pair of parallel and spaced-apart posts having inwardly facing grooves for receiving said panels in a stacked relationship to form a stack of said panels supported by said posts, said stack having upper and lower edges and at least one intermediate joint, said upper and lower edges being enclosed within channel members having a longitudinal groove for receiving said edges and each of said joints having a joint member having an H-shaped cross-section defining upwardly and downwardly facing grooves for receiving upwardly and downwardly facing edges of said panels at said joint.

Claim 13

Dependent Claim 43 words

The barrier of claim 10 further comprising at least one recess in said foam slab adjacent to said first sheet to form a chamber, said recess having a perimeter spaced-apart from said reinforcing members, and a sound absorption material contained in said chamber.

Claim 14

Dependent Claim 38 words

The noise barrier of claim 11, further comprising perforations in said first sheet at said chamber with a size and number to provide access for sound into said chamber and to protect and contain said sound absorption material.

Claim 15

Dependent Claim 20 words

The barrier of claim 12, wherein said perforations provide about a 40% open area in said sheet at said chamber.

Claim 16

Dependent Claim 24 words

The noise barrier of claim 10, wherein said foam slab is a slab of expanded polystyrene having a thickness of between about 4-8 inches.

Claim 17

Dependent Claim 21 words

The noise barrier of claim 11, wherein said sound absorption material is mineral wool having a density of about 8 lbs/c.f.

Claim 18

Dependent Claim 23 words

The barrier of claim 10, wherein said first and second sheets comprise fiberglass reinforced plastic sheets having a thickness of about 0.06 inches.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1989-01-27	1989-07-29	1990-01-28	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1993-01-27	1993-07-29	1994-01-28	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1997-01-27	1997-07-29	1998-01-28	$7700.00	Window Closed / Lapsed

Noise barrier

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