A folding chair may include a frame that is configured to transition the folding chair between use and storage positions. A seat base may be pivotally coupled thereto at a first particular length from a front end and a receiving portion may be disposed in an upper surface. The receiving portion may include left and right lateral edges, front and rear longitudinal edges, and a depth. The padding material may be disposed in the receiving portion and may have a lateral dimension related to a distance between the front and the rear longitudinal edges, a longitudinal dimension related to a distance between the front and the rear longitudinal edges, and a thickness related to the depth. The padding layer may cover a majority of a top surface of the padding material and of the upper surface. The cover may retain the padding material and the padding layer relative to the seat base.

A ventral support for use in an ergonomic work station chair, the ventral support comprising an adjustable Y axis member and a support unit, the support unit pivotally and extendibly attached to the adjustable Y axis member, wherein the support unit is heart-shaped and includes a rear, a face, and a top therebetween, the face including a right lobe and a left lobe, a clavicles support, which has a right side and a left side, is raised, is proximate the top and is horizontally disposed, and a central ridge, which extends vertically downward from the clavicles support, wherein the right lobe, the right side and the central ridge define a right concavity in the face and the left lobe, the left side and the central ridge define a left concavity in the face.

The invention consists in an orthopedic seating wedge with ventilation channels. The wedge is manufactured in a CNC machining process from a chemically cross-linked polyethylene foam with density from 40 to 50 kg/m.sup.3. The orthopedic wedge, as illustrated on FIG. 1, has a profiled body (6), with a depression in the rear (3) to maintain a straight posture of the user as well as vertical (5) and horizontal (2) ventilation channels allowing skin air access, protrusions (4) to improve blood circulation in the skin tissue, as well an indentation in the tailbone area (1) in order to relieve the lower back and enhance sitting comfort.

Appropriate material hardness prevents deformations resulting from user weight, enables it to be used on various surfaces as well as allows the wedge to have the above mentioned features while ensuring adequate sitting comfort.

A system of controlling various actuators associated with human support surfaces is disclosed. Such a system is made up of a support surface, a controller, and an actuator. The system may optionally include batteries, a means of charging the batteries, and a graphical user interface as well as a communication link between the graphical user interface and the support surfaces. The actuators are capable of altering contour and/or firmness, of a support surface, they may be vibrational or heating/cooling in nature, and they may also alter the overall relative position of a support surface.

A seat cushion according to the present invention is configured as a fluid or gas containing bag. When weight of buttocks are transferred back and forth in left, right, front, rear directions, the fluid or gas contained therein will be transferred back and forth. The level of the fluid or gas contained in the seat cushion is defined by the manufacturer which is 5-40 millimeters. The fluid or gas is detained inside in use. The seat cushion can be laid on cushion of different seats and on the floor.

An ergonomic chair has a back support member and means for arranging and supporting legs of the user in an asymmetric configuration, with a first leg extending in front of a body of the user and a second leg aligned with or extending behind the body of the user. An angle between the first and second legs in a side view can be at least 30 degrees. The means for arranging and supporting legs can comprise one or more fixed structures that support the first leg in a first orientation, or one or more dynamic structures that can be positioned by the user to support the first leg in a first orientation. In some embodiments, with the legs of the user in the asymmetric configuration, a centerline of the user is offset from a centerline of the back support member with respect to a lateral direction.

The present disclosure provides a memory foam cushion body and a memory foam seat cushion. The memory foam cushion body includes a memory foam main body and supporting silicone. The memory foam main body is provided with an upper surface and a lower surface. The supporting silicone is arranged on the upper surface of the memory foam main body; the supporting silicone is provided with a through hole penetrating through an upper surface and a lower surface of the supporting silicone; and an air layer is formed between the upper surface of the supporting silicone, an inner wall of the through hole, and the upper surface of the memory foam main body.

A body support structure includes a structural lattice structure having a first stiffness, and a compressive lattice structure supported by the structural lattice structure and having a second stiffness less than the first stiffness. A skin lattice structure is supported by the compressive lattice structure, wherein the skin lattice structure is resistant to shear deformation in response to a normal force and is expandable in a direction transverse to the normal force.

An ergonomic chair, includes: a support structure, a seat assembly, and a backrest. The seat assembly includes a seat and a seat mount arranged on the support structure. The backrest is rotatably connected to the support structure through a backrest support, and the backrest is configured to be rotatable and fixed relative to the seat assembly.

A cushion-like shaped body (1) having an elastic, gel-like filling (2) in a thin-walled outer layer (3) are frequently used as seals, cushions, vibration dampers or shape compensation materials. This shaped body (1) is to be able to withstand severe strains, distortions, compressions and flexural forces, both in the event of brief severe stress and in the event of prolonged stress. For this purpose, the cushion-like shaped body (1) has a filling (2) of a polyurethane having Shore 000 hardness less than or equal to 80 and a compression set less than or equal to 14%, and this filling (2) is present within a shell having an outer layer (3) of a soft silicone material having a layer thickness of 0.075 to 1 mm and a Shore A hardness between 3A and 45A. Such a shaped body (1) is able to return to its original form without lasting elongation after tensile strain at room temperature up to 250%. There is no formation of cracks, detachment phenomena, bubbles, folds or other lasting damage. The elongation does not cause visible detachment between filling (2) and outer layer (3).