Patent ID: 7430956

Claim:
An air cylinder for a pneumatic fan drive system comprising: a single-piece stamping for said pneumatic fan drive system; said single-piece stamping having a stepped tab portion for attaching to a piston rod for said pneumatic fan drive system; said single-piece stamping comprising; a cylinder portion extending a longitudinal centerline axis; a washer portion extending inward from said cylinder portion; said washer portion defining an aperture for receiving said piston rod; and said stepped tab portion extending into said aperture; said stepped tab portion comprising a reduced thickness portion of said single-piece stamping; and said stepped tab portion for inserting into an axial slot in said piston rod; said washer portion having an inner concentric portion sandwiched between a nut and said piston rod; said stepped tab portion having an outer surface and an inner surface with said outer surface substantially coplanar with an exterior surface of said washer portion and said inner surface recessed from said interior surface of said washer portion; and said stepped tab portion extends from said washer portion toward said longitudinal centerline axis.