Patent ID: 7654174
Filing Date: 2010-02-02
Classification: F01L

Abstract:
1. A tappet clearance adjusting apparatus for adjusting a clearance between an adjustment screw with an adjustment nut threaded thereover and a valve end of an engine, comprising: a screwdriver for rotating said adjustment screw; a first rotational driver for rotating said screwdriver; a sleeve connected to a rotatable shaft of said first rotational driver, said sleeve having a noncircular inner circumferential surface; an insert connected to an upper end of said screwdriver and including at least a portion thereof which is inserted into said sleeve; a pipe disposed concentrically around said screwdriver and supporting a socket for rotating said adjustment nut on a distal end thereof; and a second rotational driver disposed concentrically with said pipe for rotating said pipe, wherein said portion of said insert which is inserted into said sleeve has an axially short tilt support held in abutment against an inner wall surface of said sleeve, said second rotational driver has a noncircular inner wall, said pipe has a portion inserted into said noncircular inner wall and having a noncircular outer wall, and said pipe has a maximum outside diameter smaller than a maximum inside diameter of said noncircular inner wall, and greater than a minimum inside diameter of said noncircular inner wall.