Multiple stage, multiple extend, speed reducing ball screw linear actuator and method of constructing and operating the actuator
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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N/A
Issued Date -
Oct 18, 2001
app pub date -
Apr 24, 2001
filing date -
Apr 27, 2000
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A multiple extend ball screw and nut linear actuator incorporates a revolvable axially restrained ball screw with a ball nut thereon. A constant speed reversible drive revolves the screw to move the ball nut forwardly and rearwardly. External helical threads of the same hand as the ball nut threads are provided externally on the ball nut but have a substantially reduced lead. A second rotatably restrained nut having threads matching the external threads on the ball nut mounts on the ball nut and connects to the system to be actuated.
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