Patent ID: 6983691

Claim:
An adjustable stamp having a housing having a bottom surface, a center, a bottom cavity defined in the bottom surface of the housing, an ink-impregnated foam pad mounted in the bottom cavity, a character unit mounted on the ink-impregnated foam pad in the bottom cavity, and an ink fill opening defined through the center of the housing and communicating with the bottom cavity, a base mounted on the housing and having a top surface, a center, a drive rod formed on the top surface at the center of the base and having a top end, a non-circular cross section and multiple side surfaces, and a threaded post mounted on the top end of the drive rod, a cover mounted on the housing and the base and having a top surface, and a tube formed on the top surface at the center of the cover and having an inner surface and a top, a handle mounted slidably on the cover and having a top portion, a bottom portion, a tubular neck mounted slidably on the tube of the cover, formed on the bottom portion of the handle and having a top end, a cavity defined on the top end of the tubular neck, a bottom surface, a central hole defined through the bottom surface to allow the drive rod to pass moveably through the tubular neck and having a noncircular cross section corresponding to the drive rod, and a longitudinal spring mounted inside the tubular neck between the top end of the tubular neck and the top of the tube on the cover, an adjustment knob mounted rotatably on the bottom surface of the cavity and having a top end, a bottom end, an inner cavity, a drive slot defined on the top end of the adjustment knob, an annular flange defined around the bottom end of the adjustment knob and abutting the bottom surface of the tubular neck and having a diameter, and a nut mounted inside the inner cavity and screwed with the threaded post on the base.