Vibrator with eccentric weights
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United States of America Patent
Stats
-
Jul 8, 1980
Issued Date -
N/A
app pub date -
Apr 24, 1978
filing date -
Sep 1, 1976
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Two eccentric weights of a vibrator are mounted, respectively, on two coaxial shafts, one of which is a hollow shaft mounted on the other shaft. The two shafts can be connected for rotation in unison, and can be separated for relative rotation to alter the angular relationship between the weights. The mechanism is provided to alter the angular relationship between the weights while both shafts continue to rotate. An electric clutch is connected between the driven shaft and the hollow shaft to connect the two coaxial shafts for rotation in unison, and a brake is provided to slow the rotation of the hollow shaft after the clutch is disengaged. Thus, the angular relationship between the eccentric weights, and hence the stroke of the vibrator, can be changed.
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