Piston rod seal
AssigneeCR Elastomere GmbH
InventorsJurgen Netzer, Siegfried Pietsch, Bernd Stephan
Life of this patent
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Abstract
A piston rod seal includes a sealing disk provided with a reinforcement element, a guide mechanism, and a support piece which are adapted to be placed consecutively in a metal pipe or similar object functioning as a housing, and which are adapted to surround a piston rod when installed. To create a seal having relatively few components and a relatively small axial dimension, the reinforcement element is connected to the sealing disk and is constructed to function as a guide element for guiding the axial movement of the piston rod.
Claims15
A piston arrangement comprising:
- a housing having an inner surface;
- a piston rod positioned within the housing for axially moving within the housing, the piston rod having an axis and an outer surface;
- and
- a piston rod seal mounted in surrounding relation on the piston rod and located within the housing for providing a seal between the outer surface of the piston rod and the inner surface of the housing, the piston rod seal including a sealing disk to which is connected a reinforcement element, said reinforcement element functioning as a guide element that guides the piston rod during axial movement of the piston rod, the reinforcement element being a substantially U-shaped ring element possessing two axially extending legs that extend in the same direction, said two legs being spaced apart to define an interior of the reinforcement element located between the two legs, the sealing disk being located substantially entirely exteriorly of said interior of the reinforcement element.
A piston arrangement comprising:
- a housing having a radially inwardly facing inner surface;
- an axially movable piston rod positioned within the housing;
- and a rod seal for providing a seal between the housing and the axially movable piston rod, the rod seal comprising a sealing disk having an outer surface and guiding means for guiding movement of the piston rod during axial movement of the piston rod within the housing, said guiding means being a reinforcement element that is connected to said sealing disk and arranged axially with respect to said sealing disk, the reinforcement element being a substantially z-shaped element having two axially extending legs that extend in opposite directions, one of the two legs being located radially inwardly of the other leg, and a portion of said sealing disk being located between a radially outwardly facing outer surface of said other leg and the inner surface of said housing.
A piston rod seal for providing a seal between a housing and an axially movable piston rod positioned within the housing, comprising a sealing disk having an outer surface and guiding means for guiding movement of the piston rod during axial movement of the piston rod within the housing, said guiding means being a substantially U-shaped ring element possessing two axially extending legs that extend in the same direction, said two legs including one leg located radially inwardly of the other leg, said one leg having an inner surface provided with a layer of friction-reducing material, said two legs being spaced apart to define an interior of the ring element between the two legs, the sealing disk being located substantially entirely exteriorly of the interior of the ring element.
A piston arrangement comprising:
- a housing having an inner surface;
- a piston rod positioned within the housing for axially moving within the housing, the piston rod having an axis and an outer surface;
- and
- a piston rod seal mounted in surrounding relation on the piston rod and located within the housing for providing a seal between the outer surface of the piston rod and the inner surface of the housing, the piston rod seal including a sealing disk to which is connected a reinforcement element, said reinforcement element functioning as a guide element that guides the piston rod during axial movement of the piston rod, the reinforcement element being a substantially z-shaped element having two axially extending legs that extend in opposite directions, one of the two legs being located radially inwardly of the other leg and extending exteriorly of the housing.
Dependencies are inferred from the claim text.