Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member
Patent
1992-03-19
1993-05-11
Cuchlinski, Jr., William A.
Seal for a joint or juncture
Seal between relatively movable parts
Relatively rotatable radially extending sealing face member
277182, 494771, F16J 1546
Patent
active
052094987
DESCRIPTION:
BRIEF SUMMARY
The invention relates to an inflatable gasket sealing device for a door or a moving panel, such as a door for a railway car, a sliding door or a swing door, a glazed panel, etc.
Inflatable gaskets of this type are generally fixed on the periphery of the door or the panel and they comprise a sealing lip which may or may not be inflatable secured to the inflatable tubular portion of the gasket, and serving to press against a fixed surface relative to which the door or panel is movable.
The inflatable tubular portions of such gaskets are accessible, at least in part, from the outside, and this gives rise to the risk of the gasket being damaged, which gasket may also be subjected to acts of vandalism in which attempts are made to cut or puncture them by means of a sharp object or to tear them off the doors or panels on which they are mounted.
In an attempt to protect such gaskets and to make them less vulnerable to acts of vandalism, proposals have already been made to incorporate reinforcing cloth therein to increase their resistance to puncturing and to tearing. However, this also gives rise to a relatively large increase in the cost of such gaskets.
Proposals have also been made to cover and protect an inflatable gasket by a solid wall which is secured to the door or the panel and which includes a slot through which an independent sealing lip of the inflatable gasket passes and against which the gasket presses when inflated to urge the lip outwards through the slot so as to provide sealing against a fixed surface. However, when the gasket is subsequently deflated, it can also happen that the sealing lip remains jammed to a greater or lesser extent in the slot, given the small amount of clearance that exists between the sealing lip and the edges of the slot, with this impeding subsequent operation of the door or the panel.
An object of the invention is to provide a simple and effective solution to this problem.
An object of the invention is to provide an inflatable gasket sealing device for a door or moving panel in which the inflatable gasket is not demountable and is invulnerable to all kinds of attempts at damaging it.
Another object of the invention is to provide a device of this type which is particularly reliable in operation, providing very good sealing when the gasket is inflated and enabling the door or the moving panel to be moved easily when the gasket is deflated.
Another object of the invention is to provide a device of this type that is not significantly more expensive than an ordinary type of inflatable gasket.
To this end, the invention provides an inflatable gasket sealing device for a door or moving panel, the device comprising an inflatable tubular gasket which is mounted on the door or panel, and a shoe for pressing against a fixed surface relative to which the door or the panel is movable, the inflatable gasket being covered by and protected by a solid wall which is secured to the door or the panel and which includes a longitudinal slot through which the shoe passes, the device being characterized in that the shoe is secured to the inflatable gasket and is connected to a longitudinal internal partition of the inflatable gasket which constitutes return means for returning the shoe to its rest position.
Thus, according to the invention, the inflatable portion of the gasket is no longer accessible from the outside and it is protected against attempts at tearing it or puncturing it. It is therefore possible to use an ordinary type of inflatable gasket that does not include reinforcing cloth.
In addition, the thrust shoe is reliably retracted by the internal longitudinal partition of the inflatable gasket, in spite of any friction that may exist between the thrust shoe and the edges of the slot through which is passes.
In an embodiment of the invention, the above-mentioned gasket is housed inside a cover or a sheath fixed to the periphery of the door or of the panel, and said cover or said sheath includes the above-mentioned slot which is narrower than the inflatable gasket, and which is very
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Bauwirtschaft, No. 5, Jan. 27, 1972, p. 143, article "LB-Dichtungssystem" (LB-sealing system).
Cuchlinski Jr. William A.
DePumpo Daniel G.
Le Joint Francais
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