Cushions including flat springs
View Patent ↗Cushions include a chassis core. having a rigid or semi-rigid base sheet; and a plurality of paired flat springs coupled to the rigid or semi-rigid base sheet, wherein each paired flat spring comprises a lower flat spring including a first terminal end, a second terminal end, and a flexible arcuate member extending from the first terminal end to the second terminal end, and an upper flat spring including a first terminal end, a second terminal end, and a flexible arcuate member extending from the first terminal end to the second terminal end, wherein the first and second terminal ends of the upper flat spring are fixedly attached to respective first and second terminal ends of the lower flat spring such that the upper flat spring is inverted relative to the lower flat spring. Also disclosed are processes for manufacturing the core chassis.
1. A cushion comprising: a core chassis consisting of: a rigid or semi-rigid base sheet; and a single layer consisting of a plurality of paired flat springs spanning across and directly coupled to the rigid or semi-rigid base sheet, wherein each paired flat spring consists of a lower flat spring including a first terminal end, a second terminal end, and a flexible arcuate member extending from the first terminal end to the second terminal end, and an upper flat spring including a first terminal end, a second terminal end, and a flexible arcuate member extending from the first terminal end to the second terminal end, wherein the first and second terminal ends of the upper flat spring are fixedly attached to respective first and second terminal ends of the lower flat spring such that the upper flat spring is inverted relative to the lower flat spring, wherein the plurality of paired flat springs of the single layer are individually arranged, and wherein the lower flat springs of each one of the plurality of paired flat springs are directly coupled to the rigid or semi-rigid base sheet in columns and rows such that each of the paired flat springs is aligned at a 30 to 90 degree angle relative to an adjacent paired flat spring.
2. The cushion of claim 1 , wherein the plurality of paired flat springs are arranged in rows and columns on the rigid or semi-rigid base sheet such that every other paired flat spring is orthogonal to an adjacent paired flat spring.
3. The cushion of claim 1 , wherein the lower flat spring is fixedly attached to the rigid or semi-rigid base sheet at about a midpoint of the flexible arcuate member.
4. The cushion of claim 1 , wherein the flexible arcuate members of the upper and lower flat springs has a parabolic shape.
5. The cushion of claim 1 , wherein the flexible arcuate members of the upper and lower flat springs has an elliptical shape.
6. The cushion of claim 1 , wherein an arrangement of the rows and columns define a mattress dimension corresponding to a standard, queen, king, or custom sized mattress.
7. The cushion of claim 1 , wherein one of the plurality of paired flat springs and an adjacent paired flat spring further comprises an elastomeric member attached to an apex of the respective upper flat springs.
8. The cushion of claim 1 , wherein the plurality of paired flat springs are formed of a molded plastic and a selected one or both of the upper and lower the flat springs has a variable thickness.
9. The cushion of claim 1 , wherein a selected one or both of the upper and lower flat springs have a substantially rectangular cross section dimensionally varying from the first terminal end the second terminal end.