F - Mech Eng,Light,Heat,Weapons – 16 – J
Patent
F - Mech Eng,Light,Heat,Weapons
16
J
F16J 15/00 (2006.01) F15B 15/14 (2006.01) F16J 15/46 (2006.01) F16J 15/48 (2006.01) F16J 15/56 (2006.01)
Patent
CA 2373745
The invention relates to a sealing device for a piston (1) which is subjected to the action of a pressure medium and which is arranged in a working cylinder (3), whereby a piston rod guide (4) is arranged in or on the working cylinder and the rod guide has annular recesses (5). In addition, elastic sealing rings (6) and guiding means (8) are located in said recesses. According to the invention, at least one additional slot (13) provided for accommodating an additional elastic sealing ring (14) is configured in the rod guide or in a cylinder ring (12) which is connected to the pressure chamber or working chamber (11) and which surrounds the piston rod (2) in a concentric manner. In addition, means are provided in order to, if required, apply forces that are directed from the outside in a manner that is radial to the piston rod onto the additional sealing ring if required so that the sealing ring is moved or deformed such that it is transferred from a non-sealing position to a sealing position.
L'invention concerne un dispositif d'étanchéité destiné à un piston (1) soumis à l'action d'un fluide sous pression, dans un cylindre de travail (3). Dans ou sur le cylindre de travail est placé un guide de tige de piston (4) qui présente des évidements (5) annulaires dans chacun desquels est monté(e) soit une bague d'étanchéité (6) soit un moyen de guidage (8). Selon l'invention, dans le guide de tige de piston ou bien dans un manchon (12) placé à la sortie de la chambre de pression ou de travail (11) et entourant concentriquement la tige de piston (2), est formée une autre rainure (13) dans laquelle est logée une autre bague d'étanchéité (14) élastique, et des moyens servent, si nécessaire, à la répartition sur cette autre bague d'étanchéité élastique des forces dirigées vers l'extérieur, radialement par rapport à la tige de piston, de telle sorte que cette bague d'étanchéité se déplace ou se déforme pour passer d'une position de repos à une position assurant l'étanchéité.
Cassan Maclean
Log Hydraulik Gmbh
Oberhauser Ludwig
LandOfFree
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