Electric clamp
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United States of America Patent
Stats
-
Jul 1, 2003
Grant Date -
Dec 26, 2002
app pub date -
Jun 22, 2001
filing date -
Jun 22, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An electrically powered clamp has a housing, a motor attached to the housing, a ball screw driven by the motor via gears, and a linkage driven at one end by the ball screw such that the linkage rotates an output shaft attached to the other end of the linkage. The motor and gears drive the ball screw to a fully extended position to rotate the shaft to a clamped position or to a fully retracted position to rotate the shaft to an unclamped position. A built-in computer monitors and controls the clamp. The clamp can also be controlled and monitored by a remote pendant. Indicator lights on the housing and remote pendant convey clamp status information. The clamp is programmable and can memorize the clamped and unclamped positions. The clamp uses velocity and position feedback to determine appropriate drive mode. Torque monitors and timers determine if the clamp becomes stuck.
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