Beds – Bedsteads – Element or detail
Patent
1975-10-06
1976-06-01
Gilliam, Paul R.
Beds
Bedsteads
Element or detail
5349, A47C 2708
Patent
active
039598357
ABSTRACT:
This disclosure pertains to an inflatable air mattress comprised of a plurality of longitudinal inflatable main tubes, adjacent to one another, and interconnected pneumatically by short lengths of hoses, transverse to the longitudinal axis of the main tubes. One valve assembly, used to inflate the entire apparatus, is fastened to one of the main tubes near the bottom of the mattress assembly. Each main tube has fastened to it, at each end thereof, a rubber-like annular ring, cemented within the inner surface of the tubes. A lightweight metallic solid rivet-shaped device has its shaft likewise cemented to the central hole in the rubber-like ring in such a fashion that the shaft end is closest to the center of each main tube. The rivet is adapted with a dome-like cap, at one end, which is external to the end of each main tube. The outermost circular edge of the dome-like cap is coincident with the circular edge corresponding to the outside diameter of the main tube, when inflated. Thus, two parallel sides of the mattress assembly have a permanent thickness which is equal to the thickness of the main tubes when they are inflated. The plurality of parallel main tubes, end closure assemblies comprising rubber rings and rivet shaped devices, valve, and interconnecting hoses are enclosed in a waterproof fabric-like flexible casing which can be removed by opening a zipper mechanism, located along a line midway between the upper and lowermost lateral surfaces of the mattress. The size of the inside diameter of the interconnecting hoses controls the rate of air flow between adjacent main tubes. This controls the apparent hardness of the mattress and the amplitude and rate of decay of the continued diminishing oscillatory motion experienced after the body of the user stops moving. Judicious selection of air pressure and the size of the internal diameter of the connecting hoses interrelate to affect the aforementioned hardness and "after bounce" effects.
REFERENCES:
patent: 622239 (1899-04-01), Lane
patent: 3772717 (1973-11-01), Yuen et al.
Calvert Andrew M.
Gilliam Paul R.
Lawrence Peska Associates Inc.
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