Skip over navigation
Printable version [PDF]
PRODUCING A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR (from combustion products F02K)
References relevant to classification in this subclass

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){(ion sources per se H01J 27/02, ion sources for plasma processing or ion beams H01J 37/08)}
Definition statement
This 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 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 group covers:

Engines exhausting photons to produce a reactive propulsive thrust .

References relevant to classification in this group
This 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 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 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

This page is owned by Office of Patent Classification.
Last Modified: 10/11/2013