Patent ID: 8033890

Claim:
An apparatus, comprising: a body, the body defining a first portion and a second portion, the first portion of the body and the second portion of the body being movable relative to each other between a first configuration and a second configuration; and a propulsion mechanism fixedly coupled to the body, the propulsion mechanism including an expandable reservoir and a pump, the pump including an inner sleeve movably disposed within an outer sleeve, the outer sleeve being at least partially disposed within an interior region defined by the first portion of the body, the inner sleeve being at least partially disposed within an interior region defined by the second portion of the body, the first portion of the body defining an inlet port in fluid communication with the outer sleeve of the pump and the second portion of the body defining an exit port in fluid communication with the expandable reservoir, the expandable reservoir having elastomeric walls configured to contain a volume of liquid under pressure, the pump configured to draw liquid through the inlet port and into an interior region defined by the outer sleeve of the pump when the first portion of the body and the second portion of the body are moved from the first configuration to the second configuration, the pump configured to move the liquid disposed within the interior region of the outer sleeve of the pump into the expandable reservoir when the first portion of the body and the second portion of the body are moved from the second configuration to the first configuration, the propulsion mechanism configured to expel the liquid from the expandable reservoir and through the exit port to cause the body to be propelled while the apparatus is submerged in a liquid.