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1. WO1989008345 - POWER-OPERATED DEVICE WITH A COOLING FACILITY

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[ EN ]

CLAIMS

1. A power-operated device having a motor (28) operable at a prescribed voltage level, which
comprises:
a housing (22) for containing the motor (28) and formed with a cavity (23) therein;
means (62) for developing operating power at the prescribed voltage level;
means (70,72,74) for cooling the motor (28) ;
characterized by:
means (66) for containing together the
developing means (62) and the cooling means
(70,72,74) ;
the containing means (66) configured
externally to fit into the cavity (23) ;
means (136,144,146) for connecting the
developing means (62) to the motor (28) and the
cooling means (70,72,74) to provide operating power thereto, and
means (80,82) for connecting the developing means (62) to an external power source to
facilitate operation of the developing means (62) .

2. The power-operated device of Claim 1,
characterized by the cavity (23) therein being
configured for receipt of a container (32) which houses a cordless-mode power source, and the containing means (66) configured to fit into the cavity (23)
interchangeably with the cordless-mode container (32) .

3. The power-operated device of Claims 1 or 2 characterized in that the cooling means (70,72,74) cools the operating power developing means (62) .

4. The power-operated device of Claims 1, 2 or 3 which further comprises a chamber (30) formed in the housing (22) for containing the motor (28) ; and
characterized by:
cooling medium portals (88,90) formed in
spaced portions of the containing means (66) to
permit the passage of the cooling medium
therethrough;
cooling medium portals (34,54) formed in
spaced portions of the motor chamber (30) to permit the passage of the cooling medium therethrough, and means (40,76) for locating at least one
cooling medium portal (90) of the containing means (66) in alignment with at least one cooling medium portal (54) of the motor chamber (30) to permit the passage of the cooling medium therethrough.

5. The power-operated device of Claims 1, 2 or 3 characterized in that the cooling means (70,72,74) includes:
a cooling motor (70) , and
a fan cage (72) operated by the cooling motor (70).

6. The power-operated device of Claims l, 2, 3 or 5 characterized in that the fan cage (72) is positioned about the exterior of the cooling motor (70) .

7. The power-operated device of any preceding Claim characterized in that the developing means (62) operates in a power output range of 50 watts and higher.

8. The power-operated device of any preceding

Claim characterized in that the voltage supply level is in a range of 3.6 volts to 48 volts D.C.

9. The power-operated device of any preceding Claim characterized by means (42) for securing the containing means (66) within the cavity (23) of the housing (22) .

10. The power-operated device of any preceding Claim characterized in that the developing means (62) includes:
means (102,104,106,108,110,112) for converting voltage of the external power source to a high
frequency A.C. voltage;
means (114) for transforming the high
frequency A.C. voltage to a low level A.C. voltage, and
means (140,142) for rectifying the low level
A.C. voltage to a D.C. voltage level equal to the prescribed voltage level of the motor (28) .

11. The power-operated device of Claim 5 or 6 characterized by:
a shaft (94) extending from the cooling motor (70) , and
the fan cage (72) mounted on the shaft (94) and extending toward and about the cooling motor
(70).