Patent ID: 6851932

Claim:
An assembly of buckets for a turbine wheel, comprising: a pair of circumferentially adjacent buckets each having a bucket airfoil, a platform, a shank and a dovetail, the dovetails being shaped for securement of the buckets to the turbine wheel; a first bucket of said pair of buckets including at least a first support extending in a generally circumferential direction from a side thereof and beyond a marginal edge of the platform of said first bucket, said support including a support surface; a second bucket of said pair thereof having an undercut opening in a generally circumferential direction toward said first bucket and underlying the platform of said second bucket, said undercut including a surface angled radially outwardly and toward said first bucket, said first bucket including a generally radially extending surface adjacent said support, said radially extending surface and said support surface of said first bucket, together with the angled surface of said undercut of said second bucket, forming a recess between said pair of buckets underlying said second bucket; and a damper pin disposed between said adjacent buckets and in said recess, said damper pin being movable within said recess between a first position resting on said support surface and a second position engaging said radially extending surface of said first bucket and said angled surface of the recess of said second bucket for dissipating vibratory motion of the buckets.