Rotary heat exchangers

Claim 1

In a heat-exchanger of the kind having a rotary disc-type matrix that comprises a foraminous core of ceramic material arranged to effect heat transference between segregated streams of gaseous heat-exchanging fluids, said core being surrounded by a coaxial metallic drive-ring which defines an annular gap between said drive-ring and core, the improvement which comprises: a. a plurality of volute compression springs spaced about the periphery of said core, said springs having radially extending axes and their smaller ends outermost; b. projecting means connected to the internal periphery of said metallic drive-ring and located in the smaller outermost end of each spring to transmit drive from said drive-ring to each said spring; c. a plurality of metallic drive plates for said springs on which innermost ends of said springs are seated; and d. an elastomeric pad interposed between each said metallic drive plate and the outer periphery of said core, each said spring urging its associated metallic drive plate and elastomeric pad against the outer periphery of said core to transmit drive from said metallic drive-ring through said spring, drive plate and elastomeric pad to said core.