Free-wheeling overspeed grinder device

Details Free-wheeling overspeed grinder device Free-wheeling overspeed grinder device

1978-07-10

1980-11-11

Whitehead, Harold D.

Abrasive tool making process, material, or composition

With carbohydrate or reaction product thereof

51170PT, 192 483, 192 4892, 192 46, 192DIG2, B24B 2300

Patent

active

042324149

ABSTRACT:
A portable grinder incorporates a safety clutch mechanism between the drive motor output and the grinding wheel shaft to prevent the grinding wheel from dislodging due to a malfunction of the motor. In the preferred embodiment, the clutch mechanism comprises a one-way or a free-wheeling clutch and a slip clutch in parallel between the motor rotor and the drive shaft. The one-way clutch transfers power from the motor rotor to the drive shaft and grinding wheel under normal operating conditions. In the event of a motor malfunction which suddenly locks the rotor, the clutch mechanism allows the drive shaft and grinding wheel to slow and stop in a controlled fashion thereby minimizing the possibility of the grinding wheel dislodging from the drive shaft.

REFERENCES:
patent: 1114304 (1914-10-01), Stanley
patent: 1666766 (1928-04-01), Alspaugh
patent: 2055803 (1936-09-01), Rafter
patent: 2072058 (1937-02-01), Bauen
patent: 2097944 (1937-11-01), Casey
patent: 2898709 (1959-08-01), Bednarski
patent: 3364625 (1968-01-01), Sogge

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