초록 ▼

A shaft seal comprises a rotatable seal ring carrying an annular seal member for rotatably engaging a seal face of a seal member. The seal ring is mounted in a seal holder and is coupled for rotation with a hollow sleeve connected to the shaft by at least one drive pin extending radially inwardly fr

A shaft seal comprises a rotatable seal ring carrying an annular seal member for rotatably engaging a seal face of a seal member. The seal ring is mounted in a seal holder and is coupled for rotation with a hollow sleeve connected to the shaft by at least one drive pin extending radially inwardly from the seal holder and received in a longitudinal peripheral groove, in the hollow sleeve, terminated by an annular groove. The drive pin and the longitudinal groove have flat sides and the annular groove provides for milling of the longitudinal groove with a cylindrical tool without leaving arcuate terminating sides on the longitudinal groove and permits positioning of the seal interface as close as possible to the drive mechanism.

대표청구항 ▼

In a shaft seal of the type in which a first seal assembly is adapted for connection to and mutual rotation with a shaft of a machine and carries a first seal ring comprising a first annular seal surface, and in which a ring-shaped second seal assembly comprises a second seal ring including a second

In a shaft seal of the type in which a first seal assembly is adapted for connection to and mutual rotation with a shaft of a machine and carries a first seal ring comprising a first annular seal surface, and in which a ring-shaped second seal assembly comprises a second seal ring including a second annular seal surface for engaging the first annular seal surface and is adapted for mounting about the shaft and fixed to the housing of the machine, and in which the first seal assembly comprises a plurality of rotationally interconnected rings, including a seal ring holder carrying the first seal ring, and a sleeve for sealingly receiving the shaft therethrough, the improvement wherein: at least one of said plurality of rotationally interconnected rings comprises an axially extending groove including a pair of opposed parallel flat surfaces; a radially extending drive pin is mounted to another of said plurality of rings and comprises a pair of parallel opposite flat surfaces between and parallel to the opposed flat surfaces, and a further surface perpendicular to the parallel opposite flat surfaces; and the at least one ring comprises an annular groove intersecting the axially extending groove and including an additional surface parallel to and for engaging the further flat surface of the drive pin.