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PRODUCING A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR (from combustion products F02K)
References relevant to classification in this subclass
This subclass/group does not cover:

Places in relation to which this subclass is residual:

Marine propulsion or steering
Propellers for aeroplanes
Rotors for helicopters
Jet-propulsion plants
Machines or engines for liquids
Informative references
Attention is drawn to the following places, which may be of interest for search:
Spring, weight, inertia or like motors; mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for
Electric generators or motors not provided for elsewhere; Alleged perpetua mobilia obtained by electric or magnetic means
Using plasma to produce a reactive propulsive thrust (generating plasma H05H 1/00) [N:  (ion sources per se H01J 27/02, ion sources for plasma processing or ion beams H01J 37/08 )]
Definition statement
This subclass/group covers:

Engines exhausting ions or a plasma (ions and electrons) to produce a reactive propulsive thrust.

Details thereof.

Relationship between large subject matter areas

Multi-purpose ion sources which can be used inter alia as ion thruster should be classified only in H01J 27/00 and lower.

References relevant to classification in this group
This subclass/group does not cover:
Adaptations of ion or plasma engines for fitting in or to, cosmonautic vehicles
Ion sources for plasma processing or for ion beams
Apparatus for generating ions to be introduced into non-enclosed gases
Plasma accelerators
Informative references
Attention is drawn to the following places, which may be of interest for search:
Arcjets and other resistojets for fitting in or to cosmonautic vehicles
Electromagnetic launchers; Plasma-actuated launchers (railguns)
Special rules of classification within this group

Aspects related to the generation of ions (resp. plasma) should be classified in H01J 27/02 (resp. H05H 1/24) and lower.

For example, a microwave ion thruster with a peculiar acceleration grid should be classified in H01J 27/16 and F03H 1/0043.

Synonyms and Keywords
FEEP
Field Emission Electric Propulsion
HET
Hall-Effect Thruster
MPD
Magneto Plasma Dynamic
PPT
Pulsed Plasma Thruster
SPT
Stationary Plasma Thruster, a kind of Hall-Effect Thruster
Use of photons to produce a reactive propulsive thrust
Definition statement
This subclass/group covers:

Engines exhausting photons to produce a reactive propulsive thrust .

References relevant to classification in this group
This subclass/group does not cover:
Vehicle lighting
Arrangements or adaptations of signal or lighting devices for fitting in or to aircraft
Adaptations of propulsion systems for fitting in or to, cosmonautic vehicles
Lighting in general
Devices using stimulated emission, e.g. lasers
Electric lighting
Subject matter not provided for in other groups of this subclass
Definition statement
This subclass/group covers:

Engines producing a reactive propulsive thrust without exhausting a fluid, a plasma or photons .

Engines allegedly producing a reactive propulsive thrust without exhausting anything, in violation of the Newtonian law of action and reaction.

References relevant to classification in this group
This subclass/group does not cover:
Jet-propulsion plants
Using plasma to produce a reactive propulsive thrust
Using photons to produce a reactive propulsive thrust
Informative references
Attention is drawn to the following places, which may be of interest for search:
Unconventional spacecraft propulsion systems
Spring, weight, inertia or like motors; Mechanical-power producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for
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Last Modified: 10/11/2013