US 5,331,785 A · Clean room ceiling

Abstract

The invention relates to a sub-ceiling with a supporting framework in the form of a grid of insecting bearing rails (1), which is able to be suspended at points of intersection of the bearing rails (1), formed by the nodal elements (2), and the open regions (34) of which are able to be secured in an air-tight and dust-tight manner on the peripheral edges by insert members which may take the form of coffers, lighting elements, air-supply devices or air-outlet devices. The insert members rest in a sealing manner on a sealing means on the bearing rails (1), whereby in order to simplify manufacture, construction and assembly and to fulfill the requirements of clean-room conditions, the bearing rails (1) are attachable in an air-tight and dust-tight manner to the nodal elements (2), with the bearing rails (1) having angular supporting flanges (3) on their end walls (15) and the respective nodal element (2) has bearing surfaces (18) cooperating with the supporting flanges (3) to support the bearing rails (1).

Claims20

Dependent claims

A sub-ceiling comprising:

an intersecting grid of bearing rails (1) defining open regions (34) therebetween, said rails having longitudinal side walls (16), end walls (15), angular supporting flanges (3) each defining a slot-shaped recess (4) and extending outwardly and perpendicularly from said end walls (15), means (20) for sealing provided along the bearing rails and supporting flanges (3), and means (24) for locking disposed on said supporting flanges (3);
a plurality of nodal elements (2) providing means for suspension of the sub-ceiling, said nodal elements having substantially horizontal bearing surfaces (18) on which said supporting flanges (3) rest and a lug (5) extending substantially vertically from said bearing surface and through said recess (4) in said supporting flanges (3), said lug defining a slot (22) for receiving said locking means (24);
and
insert members (30) resting against said sealing means (20) on bearing rails (1) to secure the open regions (34) in an air-tight and dust-tight sealed manner.

1 more element

A suspended ceiling, comprising:

an intersecting grid of bearing rails (1) defining open regions (34) therebetween, said rails having end walls (15) with supporting flanges (3) extending outwardly and substantially completely across said end walls, wherein said flanges are provided with mitered outward corners (14) and sealing means (20) extending along an upper surface said rails and around said mitred corners;
at least one nodal element (2) for supporting bearing rails (1), said nodal elements having substantially horizontal bearing surfaces (18), wherein the supporting flanges (3) rest on said bearing surfaces (18) to support said rails with said sealing means (20) lying between said bearing surfaces and said flanges and lying between adjacent flanges (3) to seal along said mitred corners (14) whereby gaps between said corners, flanges and bearing surfaces are sealed in an air-tight and dust-tight manner;
and
insert elements (30) resting on said sealing means (20) along the upper surface of the bearing rails to seal the open regions also in an air-tight and dust-tight manner.

1 more element

Dependencies are inferred from the claim text.

Clean room ceiling

Life of this patent

Clean room ceiling

Life of this patent

Abstract

Claims20