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US 6,672,194 B2Granted
Energetic-based actuator device with rotary piston
AssigneeTextron Systems Corporation
InventorSami Daoud
Life of this patent
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Abstract
A energetic-based piston actuator system imparts a rotational motion in the piston in a manner that increases system efficiency and reliability. A malleable ring mounted about the piston neck obturates upon initiation of the energetic charge, and rifling provided on an interior surface of the actuator barrel causes the ring to rotate, and causes a counter-rotation in the piston. The rotating ring serves as a seal for preventing gas blow-by and the rotating piston is more dynamically stable throughout its travel down the barrel.
Claims23
An energetic-based piston actuator comprising:
- a barrel having a cylindrical interior surface;
- a piston in the barrel, the piston being slidable within the barrel between an initial position and a final position, the piston having an outer diameter less than an inner diameter of the interior surface of the barrel;
- a ring of malleable material about the piston and being rotatable relative to the piston;
- and
- rifling on the interior surface of the barrel wherein the rifling engages the ring when the piston is driven in a linear direction down the barrel, the rifling deforming the malleable material of the ring so as to induce a rotational motion in the ring relative to the piston during travel of the piston between the initial position and the final position, the piston being retained by the barrel following travel.
2 more elements
An energetic-based actuator comprising:
- a barrel having rifling on an interior cylindrical surface;
- a piston in the barrel having a slip-fit relationship with the barrel, the piston having a longitudinal axis;
- and
- a ring mounted about the piston and rotatable about the longitudinal axis of the piston;
- such that when a pressure charge impinges on the piston, the piston is driven down the barrel in an axial direction along the longitudinal axis of the piston from an initial position to a final position, the axial direction of movement of the piston causing the ring to deform in the rifling, causing the ring to mesh with the rifling and to rotate relative to the piston as the piston travels in the axial direction, between the initial position and the final position, the piston being retained by the barrel following travel.
2 more elements
Dependencies are inferred from the claim text.