US4279196A — Paint spray booth with silencer means

Claim 1

Independent Claim 172 words

A paint spray booth comprising an enclosed chamber defining a working area, a perforate working floor, means for supplying air to the working area and for causing a flow of air from the working area downwardly through the perforate working floor, a sub-floor beneath and spaced from the perforate working floor, means for continuously flooding the sub-floor with a scrubbing liquid and one or more openings in the sub-floor through which the scrubbing liquid and air can be extracted; and sound-deadening means operable to reduce noise levels within the working area during operation of the booth, said sound-deadening means being located below the perforate working floor and comprising sound-reflecting baffle means and, disposed adjacent at least one surface thereof, a sound-absorbing material said sound reflecting baffle means comprising a baffle plate located between the working floor and the sub-floor above the entrance to said opening or openings therein, and the sound absorbing material comprising a layer of acoustic material supported against the face of the baffle plate nearest said opening or openings.

Claim 2

Dependent Claim 172 words

A paint spray booth comprising an enclosed chamber defining a working area, a perforate working floor, means for supplying air to the working area and for causing a flow of air from the working area downwardly through the perforate working floor, a sub-floor beneath and spaced from the perforate working floor, means for continuously flooding the sub-floor with a scrubbing liquid and one or more openings in the sub-floor through which the scrubbing liquid and air can be extracted; and sound-deadening means operable to reduce noise levels within the working area during operation of the booth, said sound-deadening means being located below the perforate working floor and comprising sound-reflecting baffle means and, disposed adjacent at least one surface thereof, a sound-absorbing material said sound reflecting baffle means comprising a baffle plate located between the working floor and the sub-floor above the entrance to said opening or openings therein, and the sound absorbing material comprising a layer of acoustic material supported against the face of the baffle plate nearest said opening or openings.

Claim 3

Dependent Claim 18 words

A paint spray booth as claimed in claim 1, wherein said baffle plate comprises an inverted conical member.

Claim 4

Dependent Claim 32 words

A paint spray booth as claimed in claim 2, wherein a series of said members are disposed in spaced relation in a substantially horizontal plane between the working floor and the sub-floor.

Claim 5

Dependent Claim 36 words

A paint spray booth as claimed in claim 3, wherein each member is tilted about its longitudinal axis to reduce resistance to air flow from the working floor towards the opening or openings in the sub-floor.

Claim 6

Dependent Claim 79 words

A paint spray booth as claimed in claim 1, wherein the sub-floor is provided with a series of spaced extract openings therein, and said sound-deadening means comprises a plurality of individual noise attenuators each located above a corresponding extract opening, and wherein said baffle plate forms the outer casing of the attenuator which casing defines an enclosure open at the base thereof and reducing in cross-section towards its upper end, and said acoustic material is disposed within said enclosure.

Claim 7

Dependent Claim 17 words

A paint spray booth as claimed in claim 5, wherein said casing is at least substantially conical.

Claim 8

Dependent Claim 30 words

A paint spray booth as claimed in claim 1 wherein said sound-absorbing material is retained in position adjacent said baffle means by a lower wall member of perforate sheet material.

Claim 9

Dependent Claim 41 words

A paint spray booth as claimed in claim 1 wherein liquid supply means are provided operable to flood the outer surfaces of the baffle plate or plates with scrubbing liquid during operation of the booth to prevent contamination with paint solids.

Claim 10

Dependent Claim 165 words

In a paint spray booth of the type comprising a work area having sidewalls and a perforate floor, a sub-floor beneath and spaced from the perforate floor, means for flooding the sub-floor with a paint removing liquid such as water, at least one constricted passage through the sub-floor having at least one downwardly extending surface to define a scrubber in which overspray from the work area is intermixed with and transferred substantially to the liquid, and air moving means to cause a substantial flow of air from the work area to and through the constricted passage, the improvement which comprises: means forming a sound absorbing chamber externally adjacent and substantially coextensive with said downwardly extending surface, sound absorbent material within said sound absorbing chamber, perforations in and through said surface to permit sound in said constricted passage to be absorbed by said material, and water impervious means between said surface and said sound absorbing material to prevent said liquid from contacting said sound absorbing material.

Claim 11

Dependent Claim 165 words

In a paint spray booth of the type comprising a work area having sidewalls and a perforate floor, a sub-floor beneath and spaced from the perforate floor, means for flooding the sub-floor with a paint removing liquid such as water, at least one constricted passage through the sub-floor having at least one downwardly extending surface to define a scrubber in which overspray from the work area is intermixed with and transferred substantially to the liquid, and air moving means to cause a substantial flow of air from the work area to and through the constricted passage, the improvement which comprises: means forming a sound absorbing chamber externally adjacent and substantially coextensive with said downwardly extending surface, sound absorbent material within said sound absorbing chamber, perforations in and through said surface to permit sound in said constricted passage to be absorbed by said material, and water impervious means between said surface and said sound absorbing material to prevent said liquid from contacting said sound absorbing material.

Claim 12

Dependent Claim 76 words

A paint spray booth as claimed in claim 9, wherein the sub-floor is formed with a plurality of spaced openings each of which terminate in an outlet structure comprising an extract tube having downwardly-depending walls, and said means forming a sound-absorbing chamber comprises an outer jacket surrounding at least some of the wall area of the extract tube, the acoustic material being disposed in the space defined between the walls of the tube and the jacket.

Claim 13

Dependent Claim 30 words

A paint spray booth as claimed in claim 10, wherein each said extract tube and the respective jacket are of circular cross-section and said tube and jacket are arranged co-axially.

Claim 14

Dependent Claim 21 words

A paint spray booth as claimed in claim 9, wherein the acoustic material is enclosed within an envelope of waterproof material.

Claim 15

Dependent Claim 43 words

A paint spray booth as claimed in claim 9, wherein each downwardly-depending wall member is formed from sheet material which is shaped around the apertures therein to prevent the scrubbing liquid which travels downwardly via the respective opening from passing through said apertures.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1984-07-20	1985-01-19	1985-07-21	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1988-07-20	1989-01-19	1989-07-21	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1992-07-20	1993-01-19	1993-07-21	$7700.00	Window Closed / Lapsed

Paint spray booth with silencer means

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