A device comprises a spring and a sleeve. The spring is configured to form a closed loop. The spring is moveable between a coiled configuration when the spring is collapsed and an uncoiled configuration when the spring is expanded. The spring defines a circumference while in the uncoiled configuration. The spring is disposed within the sleeve.

A device comprises a spring and a sleeve. The spring is configured to form a closed loop. The spring is moveable between a coiled configuration when the spring is collapsed and an uncoiled configuration when the spring is expanded. The spring defines a circumference while in the uncoiled configuration. The spring is disposed within the sleeve.

The conformable pressure vessel having: a plurality of individual pressure vessels, the individual pressure vessels each having an outer wall enclosing an inner volume. The inner volumes are fluidly connected to each other. The individual pressures vessels are oriented parallel to each other.

The conformable pressure vessel having: a plurality of individual pressure vessels, the individual pressure vessels each having an outer wall enclosing an inner volume. The inner volumes are fluidly connected to each other. The individual pressures vessels are oriented parallel to each other.

A personal flotation device capable of providing buoyancy and preventing hypothermia and death caused by loss of body heat by supporting the individual's entire body out of the water. Special design features increase the ease of use to ensure successful deployment and boarding, even among injured, weak, and/or physically exhausted individuals. This personal flotation device is small and compact, so that it may be used in a prophylactic manner from low-risk to high-risk applications.

A personal flotation device capable of providing buoyancy and preventing hypothermia and death caused by loss of body heat by supporting the individual's entire body out of the water. Special design features increase the ease of use to ensure successful deployment and boarding, even among injured, weak, and/or physically exhausted individuals. This personal flotation device is small and compact, so that it may be used in a prophylactic manner from low-risk to high-risk applications.

This application relates to inflatable flotation devices that support an infant, and having first, second and third inflatable members. The first member has an outer and an inner perimeter and a first and second diameters at first and second end portions. The second member is at least partially within the inner perimeter of the first member. At least a portion of the upper surface of the second member is recessed with respect to an upper surface of the first member. The third member has an inner perimeter disposed about at least a portion of the outer perimeter of the first member. The third member has a maximum height, when inflated, that is less than the maximum height of the first member, at least a portion of the inner perimeter of the third member being spaced apart from the outer perimeter of the first member.

A personal life raft includes a rigid compartment, a first flexible arm member in sealed engagement with a first port on a first side of the rigid compartment, a second flexible arm member in sealed engagement with a second port on a second side of the rigid compartment. Each of the first flexible arm member and the second flexible arm member are impervious to water or waterproof such that water does not pass therethrough. The rigid compartment has a body chamber therein having a volume to encompass at least an upper torso of a user of the personal life raft. The rigid compartment displaces sufficient water so that the personal life raft is buoyant while in use by the user.

A personal life raft includes a rigid compartment, a first flexible arm member in sealed engagement with a first port on a first side of the rigid compartment, a second flexible arm member in sealed engagement with a second port on a second side of the rigid compartment. Each of the first flexible arm member and the second flexible arm member are impervious to water or waterproof such that water does not pass therethrough. The rigid compartment has a body chamber therein having a volume to encompass at least an upper torso of a user of the personal life raft. The rigid compartment displaces sufficient water so that the personal life raft is buoyant while in use by the user.

A multipurpose watercraft has a pair of catamaran pontoons supported by way of a transverse control bar at forward regions thereof. The watercraft may have an arched equipment rack framework extending above rearward regions of the pontoons. The watercraft also has a pair of electric motor thrusters located respectively beneath each pontoon and the control bar comprises a pair of controls operable by hand, each control operable to control a respective thruster forwards or backwards. Alternatively, the thrusters may be remotely controlled. This configuration allows an operator to be pulled behind the control bar horizontally between the pontoons, snorkellers to be pulled behind the watercraft for recreational sightseeing and/or for remote-control rescue operations.