Method of and a device for forming a fluidtight duct transition through a wall
AssigneeC. G. Doris
InventorJacques Edouard Lamy
Life of this patent
Estimating the term…
Abstract
In order to pass a duct across a wall between two spaces in which different pressures prevail, there is formed in said wall a passage which is temporarily closed off by means of a panel applied in position by the pressure, whereafter, at the time at which the duct is to be passed across the wall, the pressures in the two spaces are equalized making it possible to remove the temporary closure, the duct is introduced through the passage, a temporary seal between the passage and the exterior of the duct is formed, the pressure difference between the two spaces is restored, and a final seal between the passage and the exterior of the duct is created.
Claims18
A method of executing the transition of a duct across a wall between a first space in which a first pressure prevails and a second space normally subjected to a second pressure differing from the first, comprising the steps of:
- forming a passage across the wall, temporarily closing the passage by a pressure-differential method which utilizes the difference between the first pressure and the second pressure, subjecting the second space to the first pressure, reopening the passage, passing the duct through the passage, temporarily sealing the passage around the duct, restoring the second pressure in the second space, and finally sealing the passage around the duct.
A device intended to establish a transition for a duct across a wall between a first space in which a first pressure prevails and a second space normally at a second pressure differing from the first, comprising means forming a passage across said wall and including a peripheral rim facing that of said spaces which is normally at the higher pressure, a temporary closure means and means for placing same against the peripheral rim in such a fashion that the temporary closure means is applied against said rim by said higher pressure in order to close off the passage, means for subjecting said second space to the first pressure in order to make it possible to remove the temporary closure means, means for removing same, means for introducing the duct through the passage, means for temporarily sealing the passage around said duct, means for restoring said second pressure in said second space, and means for finally sealing the passage around the duct.
Dependencies are inferred from the claim text.