(under subclass 600) Subject matter wherein the gauge contacts an intake or exhaust valve of an internal combustion engine, or a part of the valve actuating mechanism, to determine some geometrical distance with respect to the part being contacted or to some other part of the engine.
(1) Note. This subclass includes gauges for (a) measuring the length of an intake or exhaust valve, (b) the distance between the intake or exhaust valve stem end and the motor block or (c) the length of a valve stem by gaging the distance between a valve seat on a motor block and a valve tappet.
