F - Mech Eng,Light,Heat,Weapons – 15 – B
Patent
F - Mech Eng,Light,Heat,Weapons
15
B
138/82
F15B 15/10 (2006.01)
Patent
CA 1311176
- 20 - ABSTRACT An axially contractable actuator which includes an elon- gated hollow enclosure formed by a fluid impermeable substan- tially non-elastic material and having a plurality of protru- sions each with respective bases having more than three sides. Each base side of a protrusion is attached to a base side of an adjacent protrusion by a flexible seam of continuous fold. Each protrusion is foldable about a plane dividing the protrusion into two parts from an axially-extended condition in which the base sides are substantially parallel, to an axially-contracted condition in which the protrusion encloses a volume larger than that enclosed in the axially-extended condition. A pair of axially-aligned end terminations are formed at each end of the enclosure with one of the end terminations being hollow. A pair of end connectors are each coupled to a respective end termin- ation with one of the end connectors having an axial bore providing fluid communication between an interior of the hollow enclosure as a source of pressurized fluid.
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