초록 ▼

A cushion (10, 12) has a plenum (16) which includes a plurality of flexible plastic woven tubes (34) held within a pair of similarly woven sheathes (38,40). The plenum has its sides and bottom covered by an air impermeable (14) layer with the top covered by an air permeable layer (20). A low to medi

A cushion (10, 12) has a plenum (16) which includes a plurality of flexible plastic woven tubes (34) held within a pair of similarly woven sheathes (38,40). The plenum has its sides and bottom covered by an air impermeable (14) layer with the top covered by an air permeable layer (20). A low to medium density foam pad (19) is located between the plenum (16) and the top layer (20). Conditioned air is provided to the cushions (10,12) from a Stirling cycle heat pump (44).

대표청구항 ▼

[ What is claimed is:] [1.] Variable temperature cushion apparatus, comprising:a cushion including,(a) a centrally located plenum having top, bottom and lateral sides constructed of intermeshed synthetic monofilament fibers forming a plurality of generally parallel tubes arranged side by side in sin

[ What is claimed is:] [1.] Variable temperature cushion apparatus, comprising:a cushion including,(a) a centrally located plenum having top, bottom and lateral sides constructed of intermeshed synthetic monofilament fibers forming a plurality of generally parallel tubes arranged side by side in single plane, the walls of which tubes are open-weave so that pressurized conditioned air received into the plenum can move along a relatively low back-pressure path lengthwise of the tubes and along a higher back-pressure path transversely of the tubes longitudinal axes, said tubes having sufficient transverse rigidity so as to be free from closing off to any significant extent during use,(b) an air and moisture impervious layer covering the bottom and lateral sides of the plenum, and(c) an air permeable foam sheet covering the top of the plenum;a ducting means mounted to extend through the air and moisture impervious layer to the plenum; andmeans releasably connected to the air ducting means for selectively cooling or heating a pressurized air stream including a Stirling cycle heat pump for cooling the pressurized air stream.