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US 6,554,682 B1Granted
Toy liquid storage tank
OwnerRobert F. Tammerainventor
Life of this patent
Estimating the term…
Abstract
A toy liquid storage tank includes an exterior cylindrical tank having a central vertical guide pole and a horizontally disposed flat roof. A motor gear drive mechanism linked to a pair of oppositely disposed cam lift arms raise and lower the roof along the guide pole. Roller wheels at the ends of the cams engage the roof to provide a smooth motion.
Claims6
A toy liquid storage tank comprising:
- a base,
- a hollow cylindrical shell mounted vertically on said base,
- a moveable roof fitting within and extending horizontally across said shell, and drive means mounted on said base within said shell, said drive means engaging said roof to move said roof vertically within said shell to simulate the filling and emptying of liquid in a storage tank.
Dependencies are inferred from the claim text.