Patent ID: 7501614
Filing Date: 2009-03-10
Classification: F16D,G01D

Abstract:
1. A timing disc arrangement having a central longitudinal axis, said timing disc arrangement comprising: a timing disc; a hub structure comprising a plate portion and a slotted shank portion disposed to extend from said plate portion; said timing disc being attached to said plate portion of said hub structure; said hub structure comprising a central, axial hole disposed to run through said plate portion and said shank portion and configured to receive a shaft therethrough; an annular clamping piece comprising a body portion and an annular projecting portion; said clamping piece comprising a central axial hole disposed to run through said body portion and said annular projecting portion and configured to receive said shank portion of said hub structure therein; said clamping piece being connected to said hub structure by a frictional fit between the interior surface of said clamping piece and said shank portion of said hub structure; an annular clamping member comprising a central axial hole configured and disposed to receive said clamping piece therein; said clamping member comprising an annular recess disposed about said central axial hole configured to receive said annular projecting portion of said clamping piece; said body portion of said clamping piece comprising an outer threading; said clamping member comprising an internal threading being configured and disposed to matingly engage with said outer threading of said clamping piece to connect said clamping member to said clamping piece; said threaded connection being configured to permit relative axial movement of said clamping member and said clamping piece toward and away from one another upon rotation of either one of said clamping member and said clamping piece; a pinion being disposed in said clamping member and adjacent said annular projecting portion of said clamping piece; said annular projecting portion comprising a toothed surface portion; said pinion being configured to matingly engage with said toothed surface portion of said annular projecting portion; a cover plate being attached on to said clamping member; said pinion being rotatably supported on said cover plate to permit rotation of said pinion; said pinion being configured and disposed to be rotated to thus rotate said clamping piece, and thus produce a relative axial movement of said clamping piece and said clamping member via the threaded engagement between said clamping piece and said clamping member; and said slotted hub shank being configured and disposed to be compressed by said clamping piece to clamp said hub shank onto a shaft upon axial movement of said clamping piece with respect to said hub shank disposed therein.