Ergonomic seating cushion
First Claim
1. A seating cushion comprising one or more layers of compressible material, at least one said layer having an interior cavity with an interior vertical surface, said interior vertical surface forming a continuous substantially sinusoidal oscillating waveform.
1 Assignment
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Accused Products
Abstract
An ergonomic seating cushion has a central cavity whose interior boundaries form an oscillating waveform. This feature reduces the pressure gradient on skin pressing against the cushion, promoting blood flow to the region while maintaining a central area of little or no pressure upon the perineum area. The cushion may have a dimpled surface to further lower pressure gradients, and may be tilted forward to assist in increasing lordosis and reducing lower back pain, or rearward when used by pregnant women to assist in compensating for the weight of an unborn child during pregnancy.
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Citations
20 Claims
- 1. A seating cushion comprising one or more layers of compressible material, at least one said layer having an interior cavity with an interior vertical surface, said interior vertical surface forming a continuous substantially sinusoidal oscillating waveform.
- 10. A seating cushion comprising a plurality of layers, at least one of said layers being of compressible material, the topmost of said layers having an opening therethrough, a second layer being subjacent to said topmost layer, said second layer having an interior cavity therein, said interior cavity having an opening proximate to said elongate opening and having an interior surface having vertical portions, said vertical portions forming a continuous substantially sinusoidal oscillating waveform.
Specification