A spring is provided that exhibits a variable and non-linear loading response upon compression. The spring comprises a continuous wire having a lower end convolution, an upper end convolution, and a plurality of helical intermediate convolutions. The upper end convolution, the lower end convolution, and the helical intermediate convolutions each have a respective diameter, with the continuous wire further defining a pitch between the various convolutions. In the spring, one or more of the diameters of the convolutions or one or more of the pitches varies along the length of the continuous wire such that the spring exhibits a non-linear loading response upon compression. A mattress is further provided and includes a plurality of the springs arranged in a matrix.

The invention relates to a flexible member with adjustable stiffness for lying and/or sitting furniture. This member includes one or more inner spring(s) oriented along a central axis, one or more pair(s) of outer helical springs about the central axis, and a rotating part able to rotate, about the central axis, between a blocking position and an unblocking position. Each pair of outer helical springs includes an upper outer helical spring and a lower outer helical spring, connected by a corresponding hinge, which has a pivot axis orthogonal to the central axis. In the blocking position, the rails engage the corresponding hinges of the pairs of the outer helical spring, so as to prevent radial displacement, relative to the central axis, of the corresponding hinges, while the unblocking position allows the radial displacement of each corresponding hinge.

An adjustable sleeping system. At least some of the example embodiments are an adjustable sleeping system comprising a plurality of spring modules arranged in a first column, each spring module defines a row within the first column. Each spring module may comprise a rail and a plurality of adjustable spring assembles coupled along the rail. Each adjustable spring assembly may comprise a motor coupled to the rail, a lead screw coupled to a rotor of the motor, a spring plate coupled to the lead screw, and a spring coupled to the spring plate. A bed controller is communicatively coupled to each spring module, and the bed controller is configured to selectively control a load carried by each spring assembly.

Spring modules for an adjustable sleeping system. At least some of the example embodiments are spring modules comprising: a spring rail, and a plurality of adjustable spring assemblies spaced along the length of the spring rail. Each adjustable spring assembly may comprise: a motor with a stator coupled to the spring rail, a lead screw coupled to the rotor of the motor, and the lead screw extending above an upper surface of the spring rail, a spring plate coupled to the lead screw, and a main spring coupled to the spring plate. Thus, the weight or force carried by each adjustable spring assembly along the spring rail is separately adjustable by a bed controller.

Adjustable sleeping system with force control. At least one example embodiment is a method of operating a sleeping system, the method including: sensing an area of a sleeping surface of the sleeping system, the area upon which a person resides, the sensing by a bed controller communicatively coupled to an array of adjustable spring assemblies arranged such that a top of each adjustable spring assembly defines an upper surface parallel to the sleeping surface; and driving a plurality of the adjustable spring assemblies being the adjustable spring assemblies beneath the area, the driving to control force distribution among the plurality of the adjustable spring assemblies.

Adjustable sleeping system with massage function. At least one example embodiment is a method of operating a sleeping system, the method including massaging a person residing on a sleeping surface of the sleeping system, the massaging by driving a plurality of adjustable spring assemblies, the plurality of adjustable spring assemblies part of an array of adjustable spring assemblies arranged such that a top of each adjustable spring assembly defines an upper surface parallel to the sleeping surface.

A wooden spring includes a strip of wood of medium thickness a, medium width b, and stretched length l. The coils of strips of wood are made using a method of making wooden springs with a helical shape, the coils having a mean diameter d and an average pitch s. Medium thickness a is 0.2 to 2 millimeters (mm), medium width b is 1 to 10 mm, stretched length l is 10 to 5000 mm, mean diameter d is 6 to 60 mm, and average pitch s is 4 to 40 mm. A wooden fabric interlaced of wooden springs includes helix shaped strips of wood. The wooden springs are interlaced with at least two side by side wooden springs to form a wooden spring fabric.

A cover (8) for a mattress (6) or a cushion (3) of a piece of furniture (1) with a utilized side (10) and a back side (11), wherein on the back side (11) there is a receiving device for bottom spring cushioning (12) which has spring strips (15), wherein at least one spring strip (15) is made of a fiber-reinforced plastic material with a preferably pultruded fiber core (16) and a plastic jacket (17) which surrounds the fiber core (16). It is provided that on opposite sides of the jacket (17) one jacket side (18) at a time sticks out for an enlarged support surface of the spring strip (15).

A layered cushion that may be fully disassembled for easy cleaning is disclosed herein. The sleep system is durable and fire retardant. The layered cushion may include a foam layer, a layer of void cells, and a cover. The foam permits fluids to move freely there through and contours to a user's body to maximize comfort and reduce interface pressure. The reticulated foam layer resists compression set and thermosetting. The layer of void cells also permits fluids to move freely there through and provide additional support to the user's body. The individual void cells of the void cell layer are perforated to allow the transmission of fluids there through. The cover couples the other layers together to form the layered cushion and prevents the layers from deteriorating. The cover is removable to permit cleaning each of the layers independently.

A coil-in-coil spring is provided that exhibits a variable and non-linear loading response. The spring includes a first spring portion having a first spring constant, a second spring portion having a second spring constant less than the first spring constant, and a third spring portion having a third spring constant less than the first spring constant and less than the second spring constant. The first spring portion forms an outer coil of the coil-in-coil spring and the second spring portion, the third spring portion, or both the second spring portion and the third spring portion are positioned within the first spring portion and form an inner coil of the coil-in-coil spring. A multi-coil spring is also provided that includes an outer coil, an intermediate coil positioned within the outer coil, and an inner coil positioned with the intermediate coil.