Preloaded spring assembly
AssigneeL&P Property Management Company
InventorLarry I. Bullard
Life of this patent
Estimating the term…
Abstract
A bedding or furniture spring product comprising a plurality of coil springs arranged in linear rows and columns. Each of the coil springs is preloaded by an endless strip of fabric, the strip of fabric encircling the exterior of one of the coil springs. The interior surface of the strip of fabric may be coated with a non-slip material so as to prevent the strip from falling or moving off the coil spring. Alternatively, the coil spring itself may be coated with a non-slip material. The strip of fabric leaves a portion of the end turns of the coil springs uncovered enabling the coil springs to be secured to a wire grid as for example by being wrapped around or clipped or laced to wires of the grid assembly. Alternatively, traditional hand 8-way tie may be used to connect the precompressed coil springs together and to a frame.
Claims28
A bedding or furniture spring product comprising:
- a spring assembly comprising a plurality of coil springs arranged in longitudinally extending columns and transversely extending rows, each of said coil springs having an upper end turn and a lower end turn, said upper end turns of said coil springs being secured to a grid, at least one of said coil springs being maintained in a compressed condition by a strip of fabric, said strip of fabric encircling the exterior of said at least one coil spring, and being of a width less than the diameter of at least one of said upper end turn and said lower end turn of said at least one coil spring, wherein one of said strip of fabric and said at least one coil spring has a non-slip surface,
- a mattress pad, and
- an upholstered fabric covering encasing said spring assembly and said mattress pad.
A bedding or furniture spring product comprising:
- a spring assembly comprising a plurality of coil springs arranged in longitudinally extending columns and transversely extending rows, each of said coil springs having an upper end turn and a lower end turn, said upper end turns of said coil springs being secured to a grid, at least one of said coil springs being maintained in a compressed condition by a strip of fabric, said strip of fabric encircling the exterior of said at least one coil spring and being of a width less than the diameter of at least one of said upper end turn and said lower end turn of said at least one coil spring wherein at least one of said strip of fabric and said at least one coil spring has a non-slip surface.
A bedding or furniture spring product comprising:
- a spring assembly comprising plurality of coil springs arranged in longitudinally extending columns and transversely extending rows, each of said coil springs being made of a single piece of wire and having a central spiral portion, an upper end turn of a fixed diameter and a lower end turn of a fixed diameter, each of said coil springs being held and maintained in a compressed condition by a strip of fabric, a portion of said strip of fabric passing generally around the exterior of said coil spring over said upper end turn, another portion of said strip of fabric passing below said lower end turn and additional portions of said strip of fabric passing outside said central spiral portion of said coil spring, said portion of said strip of fabric extending across said upper end turn of said coil spring being parallel said portion of said strip of fabric extending across said lower end turn of said coil spring, said strip of fabric being of a width less than the diameter of said end turns such that a portion of each of said upper and lower end turns is uncovered.
A bedding or furniture spring product comprising:
- a spring assembly including plurality of coil springs, each coil spring having an upper end turn of a first diameter, a lower end turn of a second diameter and a central spiral portion, each coil spring being held in a compressed condition by a strip of fabric surrounding and covering portions of said coil spring, said strip of fabric passing below said lower end turn, outside opposed sides of said central spiral portion and above said upper end turn, said strip of fabric being of a width less than said diameters of said end turns so as to not cover portions of said end turns, at least one of said strip of fabric and said coil spring having a non-slip surface to prevent said strip of fabric from sliding off said partially compressed coil spring.
A method of making a spring product comprising:
- providing a plurality of coil springs, each of said coil springs having an upper end turn of a first diameter, a lower end turn of a second diameter and a plurality of central convolutions between said upper end turn and said lower end turn,
- preloading at least one of said coil springs by wrapping a strip of fabric having a width less than the diameter of one of said upper and lower end turns around an exterior of said coil spring when said coil spring is at least partially compressed, such that said strip contacts only opposite ends of said upper and lower end turns,
- securing said upper end turns of said coil springs to an upper grid, and
- securing said lower end turns of said coil springs to a base.
A bedding or furniture spring product comprising:
- a spring assembly comprising a plurality of coil springs, each of said coil springs having an upper end turn, a lower end turn and a plurality of convolutions between said end turns, at least one of said coil springs being maintained in a partially compressed condition by a strip of fabric, said strip of fabric encircling the exterior of said at least one coil spring such that said strip of fabric contacts opposite ends of the upper and lower end turns, said strip of fabric being of a width less than the diameter of at least one of said upper end turn and said lower end turn of said at least one coil spring;
- and
- a grid secured to said upper end turns of said coil springs.
Dependencies are inferred from the claim text.