Fire resistant door
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United States of America Patent
Stats
-
Aug 9, 1983
Grant Date -
N/A
app pub date -
Nov 26, 1980
filing date -
Nov 29, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A fire resistant door has at least one swingable leaf which includes a glass plate. The swingable leaf comprises an inner frame composed of one or two tubular subframes having a general plane and a rigid outer cover frame. The outer frame has lateral walls surrounding the inner frame. The inner frame is formed with walls extending parallel to the general plane of the sub-frame, which walls together with lateral walls of the outer sub-frame form grooves. A support element is mounted in each groove which has an arresting projection whereas the lateral walls are formed with arresting webs extending towards the arresting projections and connected to the latter forming a force and form-locking connection.
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