| 摘要 |
Pulsating air is forced through openings in a cast around a limb. Diaphrams or bladders receive the air coming through the openings and expand and contract with the pulses of air, and vents are provided in the bladders to allow the air to escape therefrom. The expansion and contraction of the bladders in different locations beneath the casts massages the muscles. The air passing through the vents also ventilates the cast. The combined massaging and ventilation results in increased comfort and blood circulation. The air is fed through the openings in the cast by tubes which are also connected to a distributor. Air enters one side of the distributor under pressure. On the other side of the distributor are a plurality of connections for the hoses attached to the cast. A revolving plate covers the connectors except those under a cut-out section in the plate which are exposed to the pressure inside the distributor so that pressurized air can pass into the exposed connectors. Rotation of the plate sequentially causes air to flow through different hoses.
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