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Driving Device for an Extendible and Retractable Actuator

  • US 20090158871A1
  • Filed: 12/20/2007
  • Published: 06/25/2009
  • Est. Priority Date: 12/20/2007
  • Status: Abandoned Application
First Claim
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1. A driving device for an extendible and retractable actuator comprising:

  • a first rod being hollow inside and opened towards one end thereof, the first rod being disposed with a plurality of studs inside the open end thereof;

    a second rod is hollow inside and opened towards one end thereof, the second rod being disposed with a plurality of studs inside the open end thereof, the second rod further including an outer thread outside thereof, the second rod being screwed to the studs of the first rod by use of the outer thread thereof;

    a third rod including an outer thread outside thereof, the third rod being screwed to the studs of the second rod by use of the outer thread thereof; and

    a motor being drivingly connected with the third rod.

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