Bedding or seating product made with coil springs having unknotted end turns
AssigneeL&P Property Management Company
InventorsGuido Eigenmann, Niels S. Mossbeck
Life of this patent
Estimating the term…
Abstract
Disclosed herein is a bedding or seating product having a spring core comprising coil springs having unknotted end turns made from high tensile strength wire. In each embodiment, the end turns of the coil springs are generally U-shaped having one leg longer than the other, the legs being joined by an arcuate connector. The springs are oriented in the spring core such that a long leg of one end turn abuts a short leg of the adjacent end turn prior to be wrapped in helical lacing wire. The high tensile wire enables the coil springs to be manufactured using less wire than heretofore possible.
Claims32
A bedding or seating product comprising:
- a spring core made up of upper and lower border wires and a plurality of identically configured coil springs each made of a single piece of wire having a central spiral portion defining a central spring axis and terminating at opposing ends with unknotted upper and lower end turns disposed in planes substantially perpendicular to the spring axis, each of the upper and lower end turns being substantially U-shaped and having an arcuate long leg and an arcuate short leg joined by an arcuate connector, the arcuate long leg being at the free unknotted end of one of said end turns and the arcuate short leg being at the free unknotted end of the other of the end turns, the arcuate connector of one of the end turns being on the opposite side of the central spring axis from the arcuate connector of the other end turn of the coil spring, the coil springs being arranged in side-by-side rows and columns and being connected with each other at the upper and lower end turns by helical lacing wires, the coil springs being oriented the same direction in the spring core except the coil springs of the outermost columns of the spring core, every other one of the coil springs in each outermost column being flipped and rotated so that one of the connectors of one of the end turns may be clipped to one of the border wires;
- padding overlaying the upper surface of the spring core;
- and
- an upholstered covering encasing the spring core and the padding.
A bedding or seating product comprising:
- a spring core made up of upper and lower border wires and a plurality of identically configured coil springs each made of a single piece of wire having a central spiral portion defining a central spring axis and terminating at opposing ends with unknotted upper and lower end turns disposed in planes substantially perpendicular to the spring axis, each of the upper and lower end turns being substantially U-shaped and having an arcuate long leg and an arcuate short leg joined by an arcuate connector, the arcuate long leg being at the free unknotted end of one of said end turns and the arcuate short leg being at the free unknotted end of the other of the end turns, the arcuate connectors of one of the end turns being on the opposite side of the central spring axis from the arcuate connector of the other end turn of the coil spring, the coil springs being arranged in side-by-side rows and columns and being connected with each other at the upper and lower end turns by helical lacing wires, the coil springs being oriented the same direction in the spring core except the coil springs of the outermost columns of the spring core, every other one of the coil springs in each outermost column being flipped and rotated.
A bedding or seating product, comprising:
- a spring core made up of upper and lower border wires and a plurality of identically configured coil springs each made of a single piece of wire having a central spiral portion defining a central spring axis and terminating at opposing ends with unknotted upper and lower end turns disposed in planes substantially perpendicular to the spring axis, each of said upper and lower end turns being substantially U-shaped and having an arcuate long leg and an arcuate short leg joined by a connector, said long leg being at the free unknotted end of one of the end turns and said short leg being at the free unknotted end of the other of the end turns, the connector of one of the end turns being on the opposite side of the central spring axis as the connector of the other of the end turns, the coil springs being arranged in side-by-side rows and columns and connected with each other at the upper and lower end turns by helical lacing wires, the coil springs being oriented the same direction in the spring core except the coil springs of the outermost columns of the spring core, every other one of the coil springs in each of the outermost columns being clipped to only one of the upper and lower border wires.
A bedding or seating product, comprising:
- a spring core comprising upper and lower border wires and a plurality of identically configured coil springs each made of a single piece of wire having a central spiral portion defining a central spring axis and terminating at opposing ends with unknotted upper and lower end turns disposed in planes substantially perpendicular to the spring axis, each of the upper and lower end turns being substantially U-shaped and having a long leg and a short leg joined by a connector, each of the coil springs being made from high tensile strength wire, the coil springs being arranged in side-by-side rows and columns and connected with each other at the upper and lower end turns by helical lacing wires, the coil springs being oriented the same direction in the spring core except the coil springs of the outermost columns of the spring core, every other one of the coil springs in each outermost column being clipped to only one of the upper and lower border wires.
A bedding or seating product, comprising:
- a spring core made up of upper and lower border wires and a plurality of identically configured coil springs each made of a single piece of wire having a central spiral portion defining a central spring axis and terminating at opposing ends with unknotted upper and lower end turns disposed in planes substantially perpendicular to the spring axis, each of said upper and lower end turns being substantially U-shaped and having an arcuate long leg and an arcuate short leg joined by a connector, each of the end turns terminating in a free end, the connector of one of the end turns being on the opposite side of the central spiral portion of the coil spring than the connector of the other end turn, the coil springs being arranged in side-by-side rows and columns and connected with each other at the upper and lower end turns by helical lacing wires, the coil springs being oriented the same direction in the spring core except the coil springs of the outermost columns of the spring core, every other one of the coil springs in each outermost column being clipped to only one of the upper and lower border wires.
A helical coil spring comprising a wire formed into a multiple revolution central spiral portion defining a central spring axis and terminating at opposed ends with unknotted upper and lower end turns disposed in planes substantially perpendicular to the spring axis, each of the upper and lower end turns being substantially U-shaped and having a long leg and a short leg joined by an arcuate connector, said long leg being at the free unknotted end of one of said end turns and the short leg being at the free unknotted end of the other of the end turns, the lateral distance between the long leg of one of the end turns and the central spring axis being greater than the lateral distance between the short leg of the end turn and the central spring axis and the lateral distance between the long leg of the other of the end turns and the central spring axis being greater than the lateral distance between the short leg of the end turn and the central spring axis, the connector of one of said end turns being on the opposite side of the central spiral portion than the connector of the other end turn of the coil spring, wherein said wire is a high tensile strength wire having a tensile strength greater than 290,000 psi.
A helical coil spring comprising a wire having a tensile strength greater than 290,000 psi formed into a multiple revolution central spiral portion defining a central spring axis and terminating at opposed ends with unknotted upper and lower end turns disposed in planes substantially perpendicular to the spring axis, each of the upper and lower end turns being substantially U-shaped and having an arcuate long leg and an arcuate short leg joined by an arcuate connector, said long leg being at the free unknotted end of one of said end turns and the short leg being at the free unknotted end of the other of the end turns.
A method of making a spring core for a bedding or seating product, comprising:
- providing a plurality of identically configured coil springs each made of a single piece of wire having a central spiral portion defining a central spring axis and terminating at opposing ends with unknotted upper and lower end turns disposed in planes substantially perpendicular to the spring axis, each of said upper and lower end turns being substantially U-shaped and having a long leg and a short leg joined by a connector, each of said end turns terminating in a free end, said long leg being at the free unknotted end of one of said end turns and the short leg being at the free unknotted end of the other of the end turns, the connector of one of the end turns being on the opposite side of the central spiral portion than the connector of the other end turn,
- arranging the coil springs in side-by-side rows, and
- connecting adjacent rows of coil springs at the upper and lower end turns of the coil springs by helical lacing wires,
- securing only one end turn of each of the outermost coil springs to a border wire.
Dependencies are inferred from the claim text.