US4160491A — Perlite sound absorbing plate and sound insulatin…

Claim 1

Independent Claim 93 words

A perlite sound absorbing plate composed of a mixture including 1,000 cm 3 by bulk volume of foamed perlite particles each having a diameter of 0.1 to 7.0 mm, 100 to 140 g of cement, liquid rubber latex containing 5 to 20 g of solid ingredients and a suitable amount of water and produced by agitating said mixture, charging said agitated mixture into a desired metal mold, press molding with a compression ratio of 1.10 to 1.30 to form a molded plate and curing and hardening said molded plate into a final plate.

Claim 2

Dependent Claim 93 words

A perlite sound absorbing plate composed of a mixture including 1,000 cm 3 by bulk volume of foamed perlite particles each having a diameter of 0.1 to 7.0 mm, 100 to 140 g of cement, liquid rubber latex containing 5 to 20 g of solid ingredients and a suitable amount of water and produced by agitating said mixture, charging said agitated mixture into a desired metal mold, press molding with a compression ratio of 1.10 to 1.30 to form a molded plate and curing and hardening said molded plate into a final plate.

Claim 3

Dependent Claim 66 words

The perlite sound absorbing plate according to claim 1, wherein said perlite sound absorbing plate is provided with a number of different kinds of sound absorbing cavities each having a diameter from 20 to 50 mm and a depth from 30 to 90 mm, a ratio of the total area of said cavities to the total area of said sound absorbing plate being at most 40%.

Claim 4

Dependent Claim 71 words

The perlite sound absorbing plate according to claim 1, wherein said perlite sound absorbing plate is provided at its sound incident side surface with a surface reinforcing layer composed of a reinforcing aggregate mainly consisting of expanded shale having a bulk specific gravity of 0.7 to 1.5 and bonded with said perlite sound absorbing plate by an inorganic bonding agent and after hardening made integral with said perlite sound absorbing plate.

Claim 5

Dependent Claim 112 words

A perlite sound absorbing plate composed of a mixture including 1,000 cm 3 by bulk volume of an aggregate produced by mixing expanded shale particles each having a diameter of 0.1 to 5 mm with foamed perlite particles each having a diameter of 0.1 to 7 mm with a bulk ratio of 0.4 to 2.5, 120 to 160 g of cement, liquid rubber latex containing 5 to 20 g of solid ingredients and a suitable amount of water and produced by agitating said mixture, charging said agitated mixture into a desired metal mold and press molding to form a molded plate and curing and hardening said molded plate into a final plate.

Claim 6

Dependent Claim 112 words

A perlite sound absorbing plate composed of a mixture including 1,000 cm 3 by bulk volume of an aggregate produced by mixing expanded shale particles each having a diameter of 0.1 to 5 mm with foamed perlite particles each having a diameter of 0.1 to 7 mm with a bulk ratio of 0.4 to 2.5, 120 to 160 g of cement, liquid rubber latex containing 5 to 20 g of solid ingredients and a suitable amount of water and produced by agitating said mixture, charging said agitated mixture into a desired metal mold and press molding to form a molded plate and curing and hardening said molded plate into a final plate.

Claim 7

Dependent Claim 66 words

The perlite sound absorbing plate according to claim 4, wherein said perlite sound absorbing plate is provided with a number of different kinds of sound absorbing cavities each having a diameter from 20 to 50 mm and a depth from 30 to 90 mm, a ratio of the total area of said cavities to the total area of said sound absorbing plate being at most 40%.

Claim 8

Dependent Claim 244 words

A sound insulating wall comprising a plurality of equally spaced apart and vertically extending end and intermediate supporting columns each having a lower portion embedded in foundation ground and provided at its at least one side surface with a groove, a number of perlite sound absorbing plates each provided at its side surfaces with a side groove and arranged side by side in both horizontal and vertical directions, a plurality of equally spaced apart and horizontally extending upper, intermediate and lower reinforcing plates each provided at its at least one surface with a ridge engaged with said side groove of said perlite sound absorbing plate and at its both ends with projections engaged with said groove of said supporting column, said perlite sound absorbing plate being arranged side by side directly between said supporting columns in horizontal direction and through said intermediate reinforcing plate between said upper and lower reinforcing plates in vertical direction, and being composed of a mixture including 1,000 cm 3 by bulk volume of foamed perlite particles each having a diameter of 0.1 to 7.0 mm, 10 to 140 g of cement, liquid rubber latex containing 5 to 20 g of solid ingredients and a suitable amount of water and produced by agitating said mixture, charging said agitated mixture into a desired metal mold, press molding with a compression ratio of 1.10 to 1.30 to form a molded plate and curing and hardening said molded plate into a final plate.

Claim 9

Dependent Claim 244 words

A sound insulating wall comprising a plurality of equally spaced apart and vertically extending end and intermediate supporting columns each having a lower portion embedded in foundation ground and provided at its at least one side surface with a groove, a number of perlite sound absorbing plates each provided at its side surfaces with a side groove and arranged side by side in both horizontal and vertical directions, a plurality of equally spaced apart and horizontally extending upper, intermediate and lower reinforcing plates each provided at its at least one surface with a ridge engaged with said side groove of said perlite sound absorbing plate and at its both ends with projections engaged with said groove of said supporting column, said perlite sound absorbing plate being arranged side by side directly between said supporting columns in horizontal direction and through said intermediate reinforcing plate between said upper and lower reinforcing plates in vertical direction, and being composed of a mixture including 1,000 cm 3 by bulk volume of foamed perlite particles each having a diameter of 0.1 to 7.0 mm, 10 to 140 g of cement, liquid rubber latex containing 5 to 20 g of solid ingredients and a suitable amount of water and produced by agitating said mixture, charging said agitated mixture into a desired metal mold, press molding with a compression ratio of 1.10 to 1.30 to form a molded plate and curing and hardening said molded plate into a final plate.

Claim 10

Dependent Claim 122 words

The sound insulating wall according to claim 6, wherein said perlite sound absorbing plate is composed of a mixture including 1,000 cm 3 by bulk volume of an aggregate produced by mixing expanded shale particles each having a diameter of 0.1 to 5 mm with foamed perlite particles each having a diameter of 0.1 to 7 mm with a bulk ratio of 0.4 to 2.5, 120 to 160 g of cement, liquid rubber latex containing 5 to 20 g of solid ingredients and a suitable amount of water and produced by agitating said mixture, charging said agitated mixture into a desired metal mold and press molding to form a molded plate and curing and hardening said molded plate into a final plate.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1982-07-09	1983-01-08	1983-07-10	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1986-07-09	1987-01-08	1987-07-10	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1990-07-09	1991-01-08	1991-07-10	$7700.00	Window Closed / Lapsed

Perlite sound absorbing plate and sound insulating wall composed of the same

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