Portable power tool with a heat screening means

Details Portable power tool with a heat screening means Portable power tool with a heat screening means

1999-08-19

2000-12-19

Mullins, Burton

Electrical generator or motor structure

Dynamoelectric

Rotary

310 50, 310 52, 310 64, 173168, H02K 502, H02K 504, H02K 900

Patent

active

061630942

ABSTRACT:
A portable power tool including a housing (10) intended for manual support of the tool and formed with an inner surface (29), and a motor (11) supported in the housing (10) and having a stator (22) surrounded by the inner surface (29) of the housing (10) leaving a space (30) wherein at least one heat screening shell (32;52) is provided to retard heat transfer between the motor (11) and the housing (10). Each heat screening shell (32;52) is preferably a thin sheet metal element which in itself has no heat insulating properties.

REFERENCES:
patent: 2789652 (1957-04-01), Fannen
patent: 4611671 (1986-09-01), Hansson
patent: 4643263 (1987-02-01), Karden
patent: 5136197 (1992-08-01), Hallett
patent: 5669453 (1997-09-01), Akzawa

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