Mattress spring bellows assembly as for hospitals, and the like

Claim 1

In combination with a transversely bondable mattress having longitudinally spaced apart first and second transversely extending bend lines thereacross, adjacent the head and foot ends of the mattress, respectively, the combination of a spring bellows assembly comprising separate bellows, a support box comprised of substantially rigid bottom, ends and sides, and of rectangular cross-section in plan and of height to receive said separate bellows assembly therein when deflated, and also the lower part of said mattress upon said deflated separate bellows assembly with mattress to extend with upper surface at a level above the upper level of said box, said separate bellows comprising a head bellows spring segment extending from said first bend line toward said head end and selectively inflatable to subtend a head end lift degree in side elevation, a knee lift bellows spring segment having base dimension from substantially mattress first bend line to said foot end, and being selectively inflatable to dispose an apex at mattress second bend line beneath the knees of a patient, said assembly also including selectively operable means to inflate, deflate and lock in selective degrees of inflation, each of said segments, said box providing outlet opening means from which compressed air conduits from said selective spring bellows segments may extend, said conduits being included by said selectively operable means.