Patent ID: 7694977
Filing Date: 2010-04-13
Classification: F16J

Abstract:
1. An arrangement in a mechanical shaft seal, comprising: a first sliding surface part rotating with a shaft in relation to a frame; and a second sliding surface part fastened to at least one of the frame or a separate frame part that is non-rotatable in relation thereto, wherein: a first additional part is arranged to connect the first sliding surface part to at least one of the shaft and a first insertion part fastened to the shaft and is configured to rotate therewith in order to transfer the rotating motion from the shaft to the first sliding surface part, a second additional part is arranged to connect the second sliding surface part to the frame or at least to one second insertion part connected to the frame in order to prevent the rotation of the second sliding surface part in relation to the frame, and at least one of the first additional part arranged to transfer the rotation torque of at least one of the shaft and the second additional part receiving torque is a super elastic memory metal element arranged to bend within the limits of the reversible deformation of the material.