Importance

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Abstract

Valve grinder comprising a grinding wheel mounted on a bench, said bench also having a surface for supporting a valve stem support stand mounted a spaced distance from said grinding wheel, said valve stem support stand comprising a pair of V-blocks and valve bearings for engaging the valve stem and an end stop. Mounted on said surface by a tandem axis pivot is a chuck for gripping the valve stem, said chuck including a positive clamping collet that engages the valve stem annularly with a plurality of contact points when the collet is squeezed between a collet spool and collet cover by a collet fork. Said chuck further rotates the valve while maintaining the positive clamping on the valve stem during the grinding operation but independently of the valve support stand.

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First Claim