Patent ID: 6105596
Filing Date: 2000-08-22
Classification: F16J,Y10T

Abstract:
A rotary or sliding shaft seal adapted for use in a stuffing box comprising a first molded graphite ring (11) of generally triangular cross-section, one side of which is, in use, generally perpendicular to the longitudinal axis of a rotatable or slidable shaft (1), the surface of which is to be sealed in an axial direction against fluid leakage therealong, and a second side which is in use disposed generally parallel to said shaft to engage the inner wall of a housing (4) surrounding said shaft (1), a second molded graphite ring (13) of generally triangular cross-section and of generally similar dimensions to said first molded ring (11), said second ring (13) being, in use, installed in inverted relation to the first ring to define there between an axially extending void around said shaft, together with a third molded graphite ring (12) having a triangular cross-section and installed between said first and second rings (11, 13) to substantially completely fill said void prior to the application of axial pressure to said rings to develop a sealing force between the inner wall of said housing (4) and said shaft (1).