| 165 / | HD | HEAT EXCHANGE |
| DIG 9 | DD | HAVING A SOLID HEAT STORAGE MASS FOR ABSORBING HEAT FROM ONE FLUID AND RELEASING IT TO ANOTHER (I.E. REGENERATOR) {5} |
| DIG 13 | DD | .~ Movable heat storage mass with enclosure {3} |
| DIG 16 | | .~.~ Rotary storage mass {6} |
| DIG 17 | DD | .~.~.~> With thermal expansion compensating means |
| DIG 18 | DD | .~.~.~> Having means controlling direction or rate of flow {1} |
| DIG 20 | DD | .~.~.~> Seal and seal-engaging surface are relatively movable {3} |
| DIG 26 | DD | .~.~.~> Seal attached to and rotating with storage mass |
| DIG 27 | DD | .~.~.~> With particular rotary bearing or drive means {1} |
| DIG 29 | DD | .~.~.~> Cylindrical storage mass with axial flow passages |