F01DLevel 3

NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES

**Definition:** This place covers:

**Limiting references (this place does not cover):** - Machines or engines for liquids -> F03 - Non-positive-displacement pumps -> F04D

GET/api/v1/systems/patent_cpc/nodes/F01D

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F01D 1/00Non-positive-displacement machines or engines, e.g. steam turbines

F01D 11/00Preventing or minimising internal leakage of working-fluid, e.g. between stages

F01D 13/00Combinations of two or more machines or engines

F01D 15/00Adaptations of machines or engines for special use

F01D 17/00Regulating or controlling by varying flow

F01D 19/00Starting of machines or engines

F01D 21/00Shutting-down of machines or engines, e.g. in emergency

F01D 23/00Non-positive-displacement machines or engines with movement other than pure rotation, e.g. of endless-chain type

F01D 25/00Component parts, details, or accessories, not provided for in, or of interest apart from, other groups

F01D 3/00Machines or engines with axial-thrust balancing effected by working-fluid

F01D 5/00Blades

F01D 7/00Rotors with blades adjustable in operation

F01D 9/00Stators

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