| 1/00 | Steam accumulators (use of accumulators in steam engine plants F01K 3/00) |
| 1/02 | Steam accumulators (use of accumulators in steam engine plants F01K 3/00) for storing steam otherwise than in a liquid |
| 1/04 | Steam accumulators (use of accumulators in steam engine plants F01K 3/00) for storing steam in a liquid, e.g. Ruth type (in alkali to increase steam pressure F22B 1/2) |
| 1/06 | Steam accumulators (use of accumulators in steam engine plants F01K 3/00) for storing steam in a liquid, e.g. Ruth type (in alkali to increase steam pressure F22B 1/2) Internal fittings facilitating steam distribution, steam formation, or circulation (acting during charging or discharging F01K 1/08; fittings facilitating circulation through multiple accumulators F01K 1/14) |
| 1/08 | Steam accumulators (use of accumulators in steam engine plants F01K 3/00) Charging or discharging of accumulators with steam (peculiar to multiple accumulators F01K 1/12) |
| 1/10 | Steam accumulators (use of accumulators in steam engine plants F01K 3/00) specially adapted for superheated steam |
| 1/12 | Steam accumulators (use of accumulators in steam engine plants F01K 3/00) Multiple accumulators; Charging, discharging, or regulating peculiar thereto |
| 1/14 | Steam accumulators (use of accumulators in steam engine plants F01K 3/00) Multiple accumulators; Charging, discharging, or regulating peculiar thereto Circulation |
| 1/16 | Steam accumulators (use of accumulators in steam engine plants F01K 3/00) Other safety or regulating means |
| 1/18 | Steam accumulators (use of accumulators in steam engine plants F01K 3/00) Other safety or regulating means for steam pressure |
| 1/20 | Steam accumulators (use of accumulators in steam engine plants F01K 3/00) Other steam-accumulator parts, details, or accessories |
| 3/00 | Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein (regenerating exhaust steam F01K 19/00) |
| 3/02 | Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein (regenerating exhaust steam F01K 19/00) Use of accumulators and specific engine types; Regulating thereof |
| 3/04 | Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein (regenerating exhaust steam F01K 19/00) Use of accumulators and specific engine types; Regulating thereof the engine being of multiple-inlet-pressure type |
| 3/06 | Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein (regenerating exhaust steam F01K 19/00) Use of accumulators and specific engine types; Regulating thereof the engine being of extraction or non-condensing type |
| 3/08 | Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein (regenerating exhaust steam F01K 19/00) Use of accumulators, the plant being specially adapted for a specific use |
| 3/10 | Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein (regenerating exhaust steam F01K 19/00) Use of accumulators, the plant being specially adapted for a specific use for vehicle drive, e.g. for accumulator locomotives |
| 3/12 | Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein (regenerating exhaust steam F01K 19/00) having two or more accumulators |
| 3/14 | Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein (regenerating exhaust steam F01K 19/00) having both steam accumulator and heater, e.g. superheating accumulator (steam superheaters per seF22G) |
| 3/16 | Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein (regenerating exhaust steam F01K 19/00) having both steam accumulator and heater, e.g. superheating accumulator (steam superheaters per seF22G) Mutual arrangement of accumulator and heater |