Beds and mattresses
First Claim
1. A mattress comprising a plurality of inflatable tubes each of which extends across the mattress, said tubes being arranged in at least two layers wherein the tubes of each said layer are in side by side arrangement and said tubes of each said layer are divided into a plurality of arrays so that all the tubes of each respective array are inflatable in common and, means for aligning the tube of the respective layer of tubes such that the tube in use, are disposed in substantial vertical alignment with the tubes of in another layer.
2 Assignments
0 Petitions
Accused Products
Abstract
A multi-layer mattress comprises inflatable tubes each of which extends across a dimension of the mattress and form part of one of a number of arrays extending through each layer. All the tubes of any one array of which there are optimally three, are inflatable in common and are arranged in substantial vertical alignment with a corresponding array in another layer. Sequential inflation and deflation of each array causes ripples to travel along the mattress so that a patient lying on it has his weight-supporting areas continually changed. A preferred embodiment has two layers of tubes, each tube of which extends across a width of the mattress.
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Citations
14 Claims
- 1. A mattress comprising a plurality of inflatable tubes each of which extends across the mattress, said tubes being arranged in at least two layers wherein the tubes of each said layer are in side by side arrangement and said tubes of each said layer are divided into a plurality of arrays so that all the tubes of each respective array are inflatable in common and, means for aligning the tube of the respective layer of tubes such that the tube in use, are disposed in substantial vertical alignment with the tubes of in another layer.
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12. A mattress as claimed in 11 further comprising means to secure each said layer detachably to its respective formers at lateral edges of the said mattress.
Specification