Patent EA-000729-B1 (EA)
Title: Transition member for varying ceiling levels
Inventor: BISCHEL WESLEY T K
IPC: E04B9/00
Filed: 1998-06-11
Abstract: 1. A transition member between different levels of a ceiling comprising: a vertical section with an upper edge and a lower edge parallel to each other and at least a first rib and a second rib protruding from one side of the vertical section, each rib shaped to form a channel along the vertical section, with the two channels parallel to, separated from, and facing each other, and with the first rib located adjacent to the lower edge of the vertical section, and an angular section with an upper and a lower edge, with the lower edge of the angular section attached to the vertical section and protruding upward from where it is attached and away from the vertical section. 2. The transition member of claim 1 further including a first flange attached to the lower edge of the vertical section, spaced away from the first rib, and forming a coupling channel with the first rib, with the coupling channel parallel to the first and second channels. 3. The transition member of claim 1 further including a second flange attached to the upper edge of the angular section. 4. The transition member of claim 1 further including a second flange attached to the upper edge of the angular section and a third rib attached to the second flange in a manner to form a coupling channel with an open side away from the vertical section. 5. The transition member of claim 1 further including a second flange attached to the upper edge of the angular section, a third rib attached to the second flange in a manner to form a coupling channel with an open side away from the vertical section, and a fourth rib attached to the second flange in a manner to form a coupling channel with an open side toward the vertical section. 6. The transition member of claim 1 further including at least one drywall adapter with a coupling edge which interlocks with a coupling channel, with the drywall adapter including a feathered edge at the edge remote from the coupling edge. 7. The transition member of claim 6 wherein the drywall adapter includes slots formed parallel to its edges to permit the drywall adapter to flex to relieve the strain of expansion and contraction of a ceiling to which the transition member is attached. 8. The transition member of claim 1 wherein the angular section has a convex shape. 9. The transition member of claim 1 wherein the angular section has a concave shape. 10. The transition member of claim 1 wherein the angular section has a shape including complex curves. 11. The transition member of claim 1 further including a fifth rib protruding from the same side of the vertical section as the first and second rib, the fifth rib located more remote from the first rib than the from the second rib and shaped to form a channel along the vertical section, with the channel oriented in the same direction as the channel formed by the second rib. 12. The transition member of claim 1 wherein the transition member is constructed of extruded aluminum. 13. The transition member of claim 1 further including an attachment flange at the top of the vertical section, the attachment flange including a horizontal surface for attachment to a ceiling.