Security for grate covering underground air vents
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United States of America Patent
Stats
-
Apr 14, 2020
Grant Date -
May 3, 2018
app pub date -
Oct 28, 2017
filing date -
Oct 28, 2016
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
Apparatus and process for securing a grating over an atmospheric opening of a ventilation shaft fluidly communicating through the ventilation shaft to an underground ventilation duct. A vertically extending support for arrangement in the shaft has horizontal flanges for projecting across a top of at least two opposing sides of said shaft to hang said support in said shaft for over topping by said grating. An anchoring member is supported in the support at a level below the flanges and proximate the atmospheric opening. A hold-down connects to the anchoring member to secure the hold-down and the grating to the anchoring member.
First Claim
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International Classification(s)
- F16M:FRAMES, CASINGS, OR BEDS, OF ENGINES OR OTHER MACH....
- E21F:SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VEN....
- F16P:SAFETY DEVICES IN GENERAL
- E06B:FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDING....
- E04B:GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTIT....
- E04C:STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E05F:DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSIT....
- F24F:AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION;....
- E04H:BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOS....
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