US PATENT SUBCLASS 60 / 233
.~ Condition responsive thrust varying means

Current as of: June, 1999
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60 /   HD   POWER PLANTS

200.1  DF  REACTION MOTOR (E.G., MOTIVE FLUID GENERATOR AND REACTION NOZZLE, ETC.) {28}
233.~ Condition responsive thrust varying means {6}
234  DF  .~.~> Solid propellant depletion control
235  DF  .~.~> Motive fluid outlet area and fuel flow control {4}
240  DF  .~.~> Oxidizer and fuel flow control
241  DF  .~.~> Plural burners in series
242  DF  .~.~> Outlet area control
243  DF  .~.~> Fuel flow control

DEFINITION

Classification: 60/233

(under subclass 200.1) Apparatus in which the thrust of the apparatus during operation may be varied by means which senses a change in (1) the static condition of the ambient or in the relationship between the apparatus and an ambient condition, or (2) a condition of an apparatus part, motive fluid or propellant of the apparatus being controlled, or (3) a condition of a motor other than a reaction motor the output of which is itself controlled responsive to a sensed change in the condition of the ambient or an internal condition.

(1) Note. Apparatus providing means which does no more than to permit the flow of fuel to a combustion chamber for starting after a certain condition has been attained, such as a certain fuel pressure or motive fluid temperature or pressure has been established, so that the motor thereafter may be fully operational, is not classified in this or indented subclasses. Such apparatus is classified below. This and indented subclasses include starting devices, however, if they further control the flow of fuel in accordance with the definition.

(2) Note. Means (i.e., for controlling fuel flow, nozzle area, etc.) controlled positively in response to a manually actuated device through a mechanical fluid linkage are not included under this definition. For example, a nozzle control responsive to fuel pressure which is controlled by manual means only is not considered to be condition responsive. Devices with such controls are classified on other features. See subclass 261.

SEE OR SEARCH THIS CLASS, SUBCLASS:

39.24+, for plants having combustion products generators having automatic means controlling the fuel or oxidizer flow thereto.

224+, for interrelated reaction motors wherein the control of one reaction motor may be responsive to the condition of

another reaction motor. 244, for a reaction motor having diverse means for the production of combustion products wherein one is activated only as a result of a sensed condition of another or of a sensed ambient condition where the diverse combustion products producing means are not employed specifically to obtain a variation in thrust.

245, for reaction motors having diverse means for the production of combustion products wherein one means is activated as a result of the depletion of the fuel supplied to another means.

250, for reaction motors having discrete fuel supplies one of which is activated upon the depletion of another.

SEE OR SEARCH CLASS

431, Combustion,

18+, for the control of a residual combustion device responsive to burner or ambient parameters. However, if fuel or oxidizer, as claimed, is controlled responsive to a condition of a disclosed but not claimed motive fluid ejecting means classification is in Class 60, Power Plants, on the basis that the structure claimed is incomplete and an ejecting means is required to complete it.