A cushion assembly has two cushions that are loosely joined by a connector that proceeds through respective diagonal channels in respective corners of the two cushions. The connector has a length that loosely connects the cushions and, by a combination of this length and the diagonal channels, the cushions can be selectively configured co-planar with each other in a V-shape, with any arbitrary angle therebetween, and in a stacked configuration wherein the cushions are atop each other. The connector and the diagonal channels also allow the cushions to be configured at any selected angle between the V-shape configuration and the stacked configuration.

A double-shell helmet is disclosed. The double-shell helmet includes an outer shell, an impact absorbing material layer affixed to the outer shell on a first side of the impact absorbing material layer, an inner shell affixed to the impact absorbing material layer on a second side of the impact absorbing material layer opposite the first side of the impact absorbing material layer, and a foam layer affixed to the inner shell.

A seat assembly for a conveyance, such as a wheelchair, that allows the user to set the recline angle of the seat back at a seating position, fold the seat back down to a folded position and back up to the seating position, such that the seat back is returned to the seating position at the user selected recline angle R unless the recline angle is adjusted by the user. The user selected recline angle R is not disturbed by folding the seat back from the seating position, to the folded position 106, and back to the seating position.

The embodiments of the present disclosure relate to a seat, a back rest and a scaffold that can be used independently or collectively to support a user while in a seated position. The seat and the back rest may each comprise a lattice layer and a base where the lattice structure provides temperature and moisture regulation and the base may provide vibration mitigation properties.

A rising seat system and method are provided for wheelchairs. The rising seat system comprises a seat outer portion wrapping an inflatable interior cushion wherein the outer seat portion is deployed, extended, or stretched when the inflatable interior cushion is being inflated and withdrawn to its original size when the inflatable interior cushion is deflated, and an adjunct outer packaging portion connected to the seat outer portion, wherein the outer packaging portion is configured to maintain at least a battery and a pump for inflating and deflating the inflatable interior cushion. According to the method the seat outer portion is placed on the seat of the wheelchair and the adjunct outer packaging portion is passed through the slot between the seat of the wheelchair and the backrest of the wheelchair so that the connection zone is placed substantially within the slot. The adjunct outer packaging portion is hanged on the handles of the wheelchair.

Multi-layer cushion supports are described which may generally comprise a first support having a first contact surface for contacting a portion of a body and a second surface opposite to the first surface, the first support defining a central chamber and a peripheral chamber surrounding the central chamber, wherein the first support is filled with a first gas or liquid and a second support attached to the first support along the first contact surface. The second support may be filled with a second gas or liquid which is relatively more viscous than the first gas or liquid. In particular, the first support may be filled with a volume of air and the second support may be filled with oil which is less than the volume of air.

Introduced here are pressure-mitigation systems able to mitigate the pressure applied to a human body by the surface of an object (also referred to as a structure). A controller device (or simply controller) can be fluidically coupled to a pressure-mitigation device that includes a series of selectively inflatable chambers. When a pressure-mitigation device is placed between a human body and a surface, the controller can continuously, intelligently, and autonomously circulate fluid through the chambers of the pressure-mitigation device. Normally, the controller circulates air through the chambers of the pressure-mitigation device, though the controller could circulate another fluid, such as water or gel, through the chambers of the pressure-mitigation device. The controller may cause the chambers to be selectively inflated, deflated, or any combination thereof.

Introduced here are pressure-mitigation systems able to mitigate the pressure applied to a human body by the surface of an object (also referred to as a structure). A controller device (or simply controller) can be fluidically coupled to a pressure-mitigation device that includes a series of selectively inflatable chambers. When a pressure-mitigation device is placed between a human body and a surface, the controller can continuously, intelligently, and autonomously circulate fluid through the chambers of the pressure-mitigation device. Normally, the controller circulates air through the chambers of the pressure-mitigation device, though the controller could circulate another fluid, such as water or gel, through the chambers of the pressure-mitigation device. The controller may cause the chambers to be selectively inflated, deflated, or any combination thereof.

A pressure relief system for use with a wheelchair includes a backrest support including a plurality of backrest cells. The backrest cells include a base which includes a plurality of air ports, a cover in connection with the base, and resilient elements within an interior of the backrest cells. The pressure relief system-further includes a seat support including a plurality of seat cells. The seat cells includes a base which includes a plurality of air ports, a cover in connection with the base, and resilient elements within an interior of the seat cells. The pressure relief system also includes a source of pressurize air in fluid connection with the air ports of each of the backrest cells and with the air ports of the seat cells via which the resilient elements within the backrest cells and the resilient elements within the seat cells are fluidizable.

A sling seat assembly for a wheelchair includes a sling including a sitting surface, a first mounting portion positioned adjacent to the sitting surface, and a plurality of straps extending from the sitting surface, and a second mounting portion includes a plurality of rings, each of the plurality of rings is configured to receive one of the plurality of straps. The sling is formed of a laminate structure such that the sitting surface, first mounting portion, and the plurality of straps are defined by a first material, the plurality of straps further includes a second material fastened to the first material, and the sitting surface includes a third material fastened to the first material, the first, second and third materials being different materials, and each strap is configured to removably fasten to a respective portion of the sitting surface.