EP 0077438 A2 19830427 - Air-driven toy spinning top.
Title (en)
Air-driven toy spinning top.
Title (de)
Von Luft angetriebener Kreisel.
Title (fr)
Toupie propulsée par air.
Publication
Application
Priority
US 31269981 A 19811019
Abstract (en)
There is provided an air-driven top comprising a turbine chamber wherein air, delivered by an air delivery tube axially through an axial passage, is directed gradually into horizontal air passages in the turbine chamber, and smoothly accelerated such that rotational velocities as high as 25,000 R.P.M. have been measured, using human lung power as the air source. The air passages are separated by turbine vanes of uniform thickness. The air passages extend from substantially radial inner ends continuous with the axial passage in a spiral to substantially tangential outer ends continuous with air discharge ports at the periphery of the top. The top further comprises means for forming an axial point to support the top during rotation and means for generating a whistling sound during rotation.
IPC 1-7
IPC 8 full level
A63F 9/16 (2006.01); A63H 1/00 (2019.01); A63H 1/08 (2006.01); F01D 1/06 (2006.01)
CPC (source: EP US)
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
EP 0077438 A2 19830427; EP 0077438 A3 19830831; AU 8630482 A 19830428; JP S5867276 A 19830421
DOCDB simple family (application)
EP 82106598 A 19820721; AU 8630482 A 19820722; JP 16479082 A 19820921