Toy utilizing bubbles in liquid

Details Toy utilizing bubbles in liquid Toy utilizing bubbles in liquid

1990-08-03

1991-05-21

Hafer, Robert A.

Amusement devices: toys

Operated by relatively moving fluid or pressure differential

Including variable-size fluid chamber to move fluid

446267, 446156, 273 1L, 220373, A63H 2910, A63H 352, A63H 2300, A63B 6700

Patent

active

050171712

ABSTRACT:
A toy utilizing bubbles in liquid comprises a vessel to be charged with a liquid keeping an air layer at the top and to be sealed, a bubble generating member, and in-liquid movable members moved by bubbles rising in the liquid in the vessel.

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patent: 3507708 (1970-04-01), Vignaud
patent: 3733738 (1973-05-01), Kramer
patent: 3805991 (1974-04-01), Cheladze et al.
patent: 4032141 (1977-06-01), Tanimura
patent: 4294895 (1981-10-01), Atkins
patent: 4778429 (1988-10-01), Todokoro
patent: 4923429 (1990-05-01), Lewis

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