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Modular rotary actuator

  • US 5,024,116 A
  • Filed: 06/08/1989
  • Issued: 06/18/1991
  • Est. Priority Date: 06/08/1989
  • Status: Expired due to Fees
First Claim
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1. A rotary actuator comprising:

  • (a) an elongate drive shaft having pinion gear teeth mounted thereon and an axis of rotation;

    said shaft being adapted to join with and rotate a tool; and

    (b) a plurality of modular and interchangeable drive units positioned axially along said shaft;

    each of said drive units including at least one fluid actuated member having drive teeth thereon mating with said shaft gear teeth so as to operably rotate said shaft when each of said drive units is activated;

    each of said drive units including aligned axial ports and interconnecting conduits to operably provide for actuating fluid to be simultaneously transferred among said drive units such that each of said members is simultaneously selectably actuated to rotate said drive shaft about the axis of rotation thereof in a common direction.

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