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US 5,473,842 AGranted
Rooftop access system
AssigneeHillery Realty Company, Inc.
InventorHerbert R. Hillery
Life of this patent
Estimating the term…
Abstract
A rooftop access for an HVAC sheet metal enclosure is provided by cutting a T-shaped opening in a wall of the enclosure and inserting a frame with a door and a peripheral flange, the upper portion of which is inserted through the slot at the top of the opening. The flange upper portion includes a flashing, projecting over the frame below.
Claims5
An enclosure access system, comprising
- a sheet metal enclosure including at least one sheet metal wall,
- said sheet metal wall defining a slot of predetermined length, and a frame opening,
- a sheet metal access frame, comprising
- an inner frame inserted in said frame opening,
- a peripheral flange extending transversely from said inner frame to cover at least a portion of the edges of said frame opening,
- said peripheral flange including an insertion flange portion inserted through said slot.
3 more elements
An enclosure access system, comprising
- a sheet metal enclosure including at least one sheet metal wall,
- said sheet metal wall defining a horizontal slot of predetermined length and a frame opening narrower than said horizontal slot extending downwardly from said horizontal slot,
- a sheet metal access frame, comprising
- an inner frame inserted in said frame opening,
- a peripheral flange extending transversely from said inner frame to cover the side and bottom edges of said frame opening,
- said peripheral flange including a top insertion flange portion inserted through said slot,
- said top insertion flange portion including a flashing extending along said substantially the length of said top insertion flange portion, and
- a door hingedly mounted in said sheet metal access frame.
5 more elements
Dependencies are inferred from the claim text.