Conversion ceiling pan and system

Claim 2

A ceiling system comprising a pre-existing inverted T-beam ceiling structure and a plurality of conversion pans, said inverted T-beam ceiling structure including a reticulated grip of inverted T-beams, each having a generally vertical web and at least one horizontal flange and a plurality of pre-existing ceiling panels fitting within the space defined by contiguous T-beam webs and supported by the flanges thereof, each of said pans including a horizontally extending plate and an upwardly turned peripheral rim, said rim including first and second portions, said first portion of said rim having first tab means projecting laterally therefrom for engaging the flange of one of said beams, said second portion of said rim having second tab means projecting laterally in the same direction as said first tab means for engaging the flange on another of said beams, at least one of said tab means including an upstanding stop having surface means for limiting horizontal movement of said pan, each of said stop surface means being positioned to fit between the periphery of a pre-existing ceiling panel and the adjacent web of an inverted T-beam.

Claim 3

The ceiling system of claim 1 wherein the rims of adjacent pans are in abutting engagement with each other whereby the pre-existing inverted T-beams are concealed from view from below the ceiling system.

Claim 4

A ceiling system as set forth in claim 1 wherein at least one of said rim portions of one of said pans includes a generally L-shape indentation at the juncture of the plate and rim.

Claim 5

A ceiling system as set forth in claim 1 wherein at least one of said rim portions of one of said pans includes a generally arcuate indentation at the juncture of the plate and rim.

Claim 6

A ceiling system as set forth in claim 1 wherein at least one of said rim portions of one of said pans includes an angular indentation at the juncture of the plate and rim.

Claim 7

A ceiling system as set forth in claim 1 wherein at least one of said pans has a generally square shape.

Claim 8

A ceiling system as set forth in claim 1 wherein at least one of said pans has a generally rectangular shape.

Claim 9

A ceiling system as set forth in claim 1 wherein at least one of said pans has a generally hexagonal shape.

Claim 10

A ceiling system as set forth in claim 1 wherein at least one of said pans has a generally octagonal shape.

Claim 11

A ceiling system as set forth in claim 1 wherein said rim includes leg means for positioning said plates in approximately coplanar relationship.

Claim 12

A ceiling system as set forth in claim 10 wherein said leg means for positioning said plate includes one of said portions of said rim being longer than the other of said rim portions by a distance equal to the thickness of one of said tab means.

Claim 13

A ceiling system as set forth in claim 11 wherein the tab means of said longer rim portion includes said upstanding stop.

Claim 14

A ceiling system as set forth in claim 11 wherein the tab means of said shorter rim portion includes said upstanding stop.

Claim 15

A ceiling system as set forth in claim 1 wherein said rim includes leg means for positioning at least one of said seams between adjacent pans in approximate vertical alignment with the web of one of said T-beams.

Claim 16

A ceiling system as set forth in claim 14 wherein said leg means includes a first horizontally projecting leg the approximate length of the flange of one of said beams, a first vertical leg the approximate length of the thickness of the flange, and a first return leg extending in the opposite direction and having the approximate length of said first horizontally projecting leg, and said tab means of said second rim portion comprises a second horizontally projecting leg projecting in the same direction as said first horizontally projecting leg and having the approximate length of said first horizontally projecting leg, a second vertical leg the approximate length of said first vertical leg, and a second return leg extending in the opposite direction and having the approximate length of said second horizontally projecting leg.

Claim 17

A ceiling system as set forth in claim 15 wherein said tab means having a stop is proportioned to fit around the outside surface of said tab means of an adjacently arrayed pan.

Claim 18

A ceiling system as set forth in claim 15 wherein said tab means of one of said portions of one of said pans which includes a stop is proportioned so as to allow the tab means of an adjacently arrayed pan to fit around the outside surface of said tab means of one of said portions of said pans which includes a stop.

Claim 19

A ceiling pan for use in conjunction with a plurality of generally parallel horizontally extending inverted T-beams and ceiling panels supported by the inverted T-beams, said pan comprising a horizontally extending plate portion and an upwardly turned peripheral rim, said rim including first and second portions, said first portion of said rim having a first tab means projecting laterally therefrom for engaging one of said T-beams, said second portion of said rim having second tab means projecting laterally in the same directions as said first tab means for engaging another pan, at least one of said tab means including an upstanding stop having surface means positioned between a vertical face of an inverter T-beam and an edge face of a ceiling panel for limiting horizontal movement of said pan, said tab means of said first rim portion comprising a first horizontally projecting leg, a first vertical leg, and a first return leg extending in the opposite direction of said first horizontally projecting leg and having the approximate length of said first horizontally projecting leg, and said tab means of said second rim portion comprising a second horizontally projecting leg extending in the same direction as said first horizontally projecting leg and having the approximate length of said first horizontally projecting leg, a second vertical leg the approximate length of said first vertical leg, and a second return leg extending in the opposite direction of said second horizontally projecting leg and having the approximate length of said second horizontally projecting leg.

Claim 20

A ceiling pan for use in conjunction with a plurality of generally parallel horizontally extending inverted T-beams and ceiling panels supported by the inverted T-beams, said pan comprising a horizontally extending plate portion and an upwardly turned peripheral rim, said rim including first and second portions, said first portion of said rim having a first tab means projecting laterally therefrom for engaging one of said T-beams, said second portion of said rim having second tab means projecting laterally in the same directions as said first tab means for engaging another pan, at least one of said tab means including an upstanding stop having surface means positioned between a vertical face of an inverter T-beam and an edge face of a ceiling panel for limiting horizontal movement of said pan, said tab means of said first rim portion comprising a first horizontally projecting leg, a first vertical leg, and a first return leg extending in the opposite direction of said first horizontally projecting leg and having the approximate length of said first horizontally projecting leg, and said tab means of said second rim portion comprising a second horizontally projecting leg extending in the same direction as said first horizontally projecting leg and having the approximate length of said first horizontally projecting leg, a second vertical leg the approximate length of said first vertical leg, and a second return leg extending in the opposite direction of said second horizontally projecting leg and having the approximate length of said second horizontally projecting leg.

Claim 21

A pan as set forth in claim 18 and adapted for use in connection with a plurality of said pans, each of said pans abutting its neighbors to form a generally planar ceiling which conceals the inverted T-beams from view from below, said second tab means of one of said pans resting on the first tab means of its neighbor, said first tab means of said neighbor resting on a flange of a T-beam, said first and second rim portions of said pans being proportioned to maintain said plate portions coplanar when said first tab means of each of said pans rests on a flange of a T-beam and said second tab means of each of said pans rests on said first tab means of its neighbor.