Amusement devices: toys – Aquatic – Boat
Reexamination Certificate
2000-02-11
2001-10-30
Rimell, Sam (Department: 3712)
Amusement devices: toys
Aquatic
Boat
C446S457000
Reexamination Certificate
active
06309274
ABSTRACT:
The present invention relates to a magnetic drive and clutch assembly, especially to an assembly suitable for use in radio or remote-controlled toys and model vehicles.
U.S. Pat. No. 4,902,260, which is considered to constitute the closest prior art, describes an amphibious car adapted for motion in water and upon land and having a plurality of paddle wheels. DE 3240608 A1 describes a submersible submarine which includes a propeller driven by means of a magnetic drive arrangement. A plate carrying two magnets is secured onto the shaft of a drive motor in a waterproof housing. The propeller shaft is fitted with a further disc having two holes each of which is fitted with two round permanent magnets.
According to the present invention, there is provided a toy adapted for motion in water and upon land and having a waterproof housing and a plurality of paddle wheels driven by a magnetic drive, the drive comprising (i) a motor assembly coupled to an axle carrying a corresponding plurality of mounts each carrying at least one drive magnet of a chosen polarity, and (ii) at least one wheel magnet of opposite polarity associated with each paddle wheel; the magnet mounts and wheels being mounted for support such that the drive and wheel magnets are axially adjacent with a spacing therebetween; the motor assembly, magnet mount and axle being housed within the waterproof housing; and wherein the magnetic strength of the drive magnets and wheel magnets are selected to produce a magnetic interaction of such strength that if a wheel encounters an obstacle, the magnetic drive system acts also as a clutch.
The present invention also provides a toy duck having the features of the toy described above.
REFERENCES:
patent: 3793769 (1974-02-01), Tong
patent: 3824735 (1974-07-01), Brandstatter
patent: 5453035 (1995-09-01), Jenkins
Pape John
Raffo David
Thomson Harry
Woodward Shaun
Anderson Chad
Rimell Sam
Shannon John P.
Venable
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