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US 4,303,250 AGranted
Sealing in an adapter for available sealing grooves
AssigneeStefa Industri Aktiebolag
InventorPer-Ake Persson
Life of this patent
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AssigneeStefa Industri Aktiebolag
InventorPer-Ake Persson
Estimating the term…
Sealing in an adapter for available sealing grooves, preferably for a reciprocating piston rod (1) of a cylinder (2) and for adapting the sealing to other types of sealing rings and comprising an adapter body (7) the outer dimensions of which substantially correspond to those of the available sealing groove (3) and having a radially inner sealing (8) providing a seal between the piston rod (1) and the adapter body (7) and a radially outer sealing (9) providing a seal between the adapter body (7) and the cylinder (2). Preferably the first mentioned sealing (8) is mounted at or adjacent the end of the adapter body (7), which is opposed the pressurized chamber (P) whereas the second sealing (9) is provided at or adjacent the end of the adapter body (7) facing the pressurized chamber (P). One and the same adaptor body may include one or several sealings of both kinds.
An adaptor for sealing grooves of a cylinder for sealing a reciprocating piston rod, comprising an adaptor body, the outer dimensions of which substantially correspond to those of the sealing groove of the cylinder and which is formed with a radially inner sealing means providing a seal between the piston rod and the adaptor body, said radially inner sealing means is provided at or adjacent the end of the adaptor body which is opposite an end facing a pressurized chamber, said radially inner sealing means comprises a sealing ring having a rectangular or elongated cross section form disposed in said sealing ring groove which sealing ring groove, adjacent the end of the cylinder ring groove facing said pressurized chamber is formed with a thickened portion having less diameter than the remaining part of the sealing ring groove.
An adaptor for sealing grooves of a cylinder for sealing a reciprocating piston rod, comprising an adaptor body, the outer dimensions of which substantially correspond to those of the sealing groove of the cylinder and which is formed with a radially inner sealing means providing a seal between the piston rod and the adaptor body, said radially inner sealing means comprising a sealing ring having a rectangular or elongated cross section form disposed in a sealing ring groove which sealing ring groove, adjacent the end of the cylinder ring groove facing said pressurized chamber is formed with a thickened portion having less diameter than the remaining part of the sealing ring groove, and a radially outer sealing means providing a seal between the adaptor body and the cylinder.
An adaptor for sealing grooves of a cylinder for sealing a reciprocating piston rod, consisting essentially of an adaptor body, the outer dimensions of which substantially correspond to those of the sealing groove of the cylinder and which is formed with at least one radially inner sealing means providing a seal between the piston rod and the adaptor body, said radially inner sealing means consisting of at least one sealing ring having a rectangular or elongated cross-section form disposed in a sealing ring groove provided at or adjacent the end of the adaptor facing the non-pressurized chamber and whereby the inner cylinder ring groove at the end facing the pressurized chamber has a stepped landing having less diameter than the remaining part of the sealing ring groove, and at least one radially outer sealing means providing a seal between the adaptor body and the said cylinder groove and provided at or adjacent the end of the adaptor body facing the pressurized chamber.
Dependencies are inferred from the claim text.