Composite cylinder
AssigneeCrompton Technology Group Limited
InventorsJonathan David Pethick, Michael Paul Somerfield
Life of this patent
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Abstract
A composite cylinder for an actuator. The cylinder includes a radially inner fibre-reinforced polymer layer defining a hollow bore, a radially outer fibre-reinforced polymer layer, a primary conductive coil, and a first and second secondary conductive coil wound between the radially inner fibre-reinforced polymer layer and the radially outer fibre-reinforced polymer layer. The first secondary conductive coil extends axially along at least a first region of the cylinder and the second secondary conductive coil extends axially along at least a second region of the cylinder, and wherein the primary conductive coil extends axially along at least a central region of the cylinder between the first region and the second region.
Claims14
A composite cylinder for an actuator, wherein the cylinder comprises:
- a radially inner fibre-reinforced polymer layer defining a hollow bore;
- a radially outer fibre-reinforced polymer layer;
- and
- a primary conductive coil, and a first and second secondary conductive coil wound between the radially inner fibre-reinforced polymer layer and the radially outer fibre-reinforced polymer layer,
- wherein the first secondary conductive coil extends axially along at least a first region of the cylinder and the second secondary conductive coil extends axially along at least a second region of the cylinder, and wherein the primary conductive coil extends axially along at least a central region of the cylinder between the first region and the second region;
- wherein the primary conductive coil, the first secondary conductive and the second secondary conductive coil are positioned in the same layer;
- and
- wherein the primary conductive coil is positioned axially between the first secondary conductive coil and the second secondary conductive coil.
A method of manufacturing a composite cylinder for an actuator, the method comprising:
- winding fibres around a mandrel to form a radially inner layer;
- winding conductive wire over at least a central region of the inner layer to form a primary conductive coil;
- winding conductive wire over at least a first region of the inner layer to form a first secondary conductive coil;
- winding conductive wire over at least a second region of the inner layer to form a second secondary conductive coil, wherein the central region is between the first and second regions;
- winding fibres over the primary conductive coil and the first and second secondary conductive coils to form a radially outer layer, wherein the primary conductive coil, the first secondary conductive and the second secondary conductive coil are positioned in the same layer and wherein the primary conductive coil is positioned axially between the first secondary conductive coil and the second secondary conductive coil;
- and
- curing at least the radially inner layer and the radially outer layer.
Dependencies are inferred from the claim text.