One-sided innerspring assembly
View Patent ↗A spring cushion assembly for a one-sided mattress includes a plurality of spring coils. Each spring coil has a length of spring wire formed at opposite upper and lower ends in respective upper and lower end turns and in an intervening coil extent therebetween. The spring coils are characterized in that the lower end turns of each coil is closed by a knot formed between the lower wire end and the coil extent. The spring coils are further characterized in that the upper end turn of a first selected number of the spring coils is open with the upper wire end unknotted to the coil extent and the upper end turn of a second selected number of the spring coils is closed by a knot formed between the upper wire end and the coil extent.
1. A one-sided innerspring assembly comprising:
a plurality of spring coils each comprising a length of spring wire formed at opposite upper and lower wire ends in respective upper and lower end turns and in an intervening coil extent therebetween,
the spring coils being arranged side by side one another in parallel linear spring coil rows and parallel linear spring coil columns perpendicular to the spring coil rows, with the upper end turns of the spring coils essentially coplanar with each other and with the lower end turns essentially coplanar with each other,
the lower end turn of each spring coil being closed by a knot formed between the lower wire end and the coil extent,
the upper end turn of each spring coil of a first selected number of the spring coils being open with the upper wire end unknotted to the coil extent,
the upper end turn of each spring coil of a second selected number of the spring coils being knotted with the upper end turn being closed by a knot formed between the upper wire end and the coil extent; and
a plurality of connector wires integrating the upper end turns and lower end turns of the spring coils, respectively, for forming a stable lower base of the spring assembly.
2. A one-sided innerspring assembly in accordance with claim 1 , wherein the spring coils being knotted at the upper end turn are arranged with respect to the spring coils being open at the upper end turn to form a plurality of zones with differing levels of relative firmness.
3. A one-sided innerspring assembly in accordance with claim 2 , wherein a first zone comprised of spring coils being knotted at the upper end turn extends along the outer perimeter of the spring assembly and surrounds a second zone comprised of spring coils being open at the upper end turn.
4. A one-sided innerspring assembly in accordance with claim 2 , wherein first and second zones each comprised of spring coils being open at the upper end turn extend along opposite sides of the spring assembly on either side of a third zone of spring coils being knotted at the upper end turn.
5. A one-sided innerspring assembly in accordance with claim 2 , wherein first, second and third zones each comprised of spring coils being open at the upper end turn are arranged as spaced-apart rows with fourth and fifth zones each comprised of spring coils being knotted at the upper end turn interspersed between the first, second and third zones.
6. A one-sided innerspring assembly in accordance with claim 1 , wherein, in at least a portion of spring coils having the upper end turn being open with the upper wire end unknotted to the coil extent, the portion of the length of spring wire forming the upper end turn includes at least one sinuous twist arranged therein.
7. A one-sided mattress comprising:
an innerspring assembly comprising:
a plurality of spring coils each comprising a length of spring wire formed at opposite upper and lower wire ends in respective upper and lower end turns and in an intervening coil extent therebetween,
the spring coils being arranged side by side one another in parallel linear spring coil rows and parallel linear spring coil columns perpendicular to the spring coil rows, with the upper end turns of the spring coils essentially coplanar with each other and with the lower end turns essentially coplanar with each other,
the lower end turn of each spring coil being closed by a knot formed between the lower wire end and the coil extent,
the upper end turn of each spring coil of a first selected number of the spring coils being open with the upper wire end unknotted to the coil extent,
the upper end turn of each spring coil of a second selected number of the spring coils being knotted with the upper end turn being closed by a knot formed between the upper wire end and the coil extent; and
a plurality of connector wires integrating the upper end turns and lower end turns of the spring coils, respectively, for forming a stable lower base of the spring assembly.
8. A one-sided mattress in accordance with claim 7 , wherein the spring coils being knotted at the upper end turn are arranged with respect to the spring coils being open at the upper end turn to form a plurality of zones with differing levels of relative firmness.
9. A one-sided mattress in accordance with claim 8 , wherein a first zone comprised of spring coils being knotted at the upper end turn extends along the outer perimeter of the spring assembly and surrounds a second zone comprised of spring coils being open at the upper end turn.
10. A one-sided mattress in accordance with claim 8 , wherein first and second zones each comprised of spring coils being open at the upper end turn extend along opposite sides of the spring assembly on either side of a third zone of spring coils being knotted at the upper end turn.
11. A one-sided mattress in accordance with claim 8 , wherein first, second and third zones each comprised of spring coils being open at the upper end turn are arranged as spaced-apart rows with fourth and fifth zones each comprised of spring coils being knotted at the upper end turn interspersed between the first, second and third zones.
12. A one-sided mattress in accordance with claim 7 , wherein, in at least a portion of spring coils having the upper end turn being open with the upper wire end unknotted to the coil extent, the portion of the length of spring wire forming the upper end turn includes at least one sinuous twist arranged therein.