MULTIPLE-ACTING LINEAR ACTUATOR
First Claim
1. A multiple-acting linear actuator intended to drive at least two moving elements relative to a fixed element, comprising:
- a plurality of concentric tubular bodies forming rods and engaged in succession inside one another via external and/or internal screw threads;
wherein one of the bodies is connected to rotational drive means, the other bodies then together forming an internal and/or external drive train; and
wherein said bodies are associated with selective lock-up means while end most bodies of the internal and/or external drive trains are permanently prevented from turning.
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Accused Products
Abstract
The present invention relates to a multiple-acting linear actuator (100) intended to drive at least two elements capable of moving relative to a fixed element comprising a plurality of rod-forming concentric tubular bodies (103, 102, 104) engaged successively one inside the next via external and/or internal screw threads (105, 106, 107, 108), characterized in that one of the bodies is connected to rotational-drive means (109), the other bodies then together forming an internal and/or external transmission train, and in that said bodies are associated with selective lock-up means whereas the outermost bodies of the internal and/or external transmission trains are permanently prevented from rotating.
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Citations
13 Claims
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1. A multiple-acting linear actuator intended to drive at least two moving elements relative to a fixed element, comprising:
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a plurality of concentric tubular bodies forming rods and engaged in succession inside one another via external and/or internal screw threads; wherein one of the bodies is connected to rotational drive means, the other bodies then together forming an internal and/or external drive train; and wherein said bodies are associated with selective lock-up means while end most bodies of the internal and/or external drive trains are permanently prevented from turning. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification