US PATENT SUBCLASS 102 / 283
POWDER FORM

Current as of: June, 1999
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102 /   HD   AMMUNITION AND EXPLOSIVES

283POWDER FORM {6}
284  DF  .~> Spiral type
285  DF  .~> Composite type {2}
289  DF  .~> Having embedded reinforcing or burning control means
290  DF  .~> Having burning inhibiting means
291  DF  .~> Rocket propellent grain
292  DF  .~> Powder grain

DEFINITION

Classification: 102/283

POWDER FORM:

(under the class definition) Subject matter which includes method and apparatus including a chemically reactive combustible composition having more than a nominal solid propellent form for the purpose of changing the burning rate or the manner of burning when ignited.

(1) Note. The "solid propellent form" is defined here as being a unitary mass of solid propellent composition or a plurality of individual propellent forms united to define a unitary or composite form which includes: (a) an external or internal surface of specific configuration; (b) a burning rate modifier structure which directs a flame front through the form (the "flame front" is intended to be the actual burning surface of the solid propellent form at any particular instant in the total burning period); or (c) reinforcing or form support means attached to or imbedded within or in immediate contact with the propellent form, or forming a portion of the unitary structure.

The solid propellent composition includes all detonating and deflagrating compositions, including immediately adjacent oxidizer and fuel compositions (see "(1) Note", Class 60, Power Plants, subclass 205), which react under combustion to detonate or deflagrate. It further includes a solid fuel or solid oxidizer composition which is adapted to be brought in immediate contact with a solid or fluid oxidizer or fuel, respectively, when combustion is desired. For example, the

solid propellent form used in reaction motors of the type classified in Class 60, Power Plants, subclass 251 would be included under this definition. The solid propellent composition referred to above excludes manufactured fuel of general utility, such as fuel briquets which are provided for elsewhere, see the search notes below.

(2) Note. A "granule" of propellent is defined here as synonymous with finely divided particulate or powdered material, and further includes an individual propellent form which is disclosed as used in combination with other unconnected granules of an identical or similar shape, size, or composition which produce a combined gas producing result upon combustion. Each granule burns individually with its own individual characteristics depending upon its shape, size, and composition. The individual characteristics of each granule are combined with the characteristics of other unconnected granules to produce a total desired result upon combustion.

(3) Note. A "solid propellent form" claimed with only a nominal shape is provided for elsewhere, see the search notes below. However if the "solid propellent form" is characterized by structure or size such that there is imparted to the form the capacity to function as an individual unit to produce or alter a particular detonation or deflagrating effect the form is not regarded as nominal and is classified under this definition.

The following examples have been considered to be significant inclusion of structure and if included would cause classification in this class (102): (a) a generally perforated propellent mass combined with a specific density; (b) a broadly configured mass (i.e., a sheet) with at least one specific dimension; and (c) a porous propellent mass claimed in combination with a capillary perforation extending therethrough.

SEE OR SEARCH THIS CLASS, SUBCLASS: 200+, for igniting devices or systems with an explosive, deflagrating, or igniting composition.

305, for a detonation wave modifying explosive.

314+, for a contained blasting charge.

332, for a blasting charge having a definite structural form used for blasting purposes.

335+, for pyrotechnics including flares in subclasses 336+.

372+, for a radially directed propelling means.

374+, for a reaction motor with a payload.

401+, for mines.

430+, for cartridges which include a casing with gun powder.

464+, for cartridge cases.

473+, for shells having an explosive within. 530+, for a jacketed or cartridge gas generator source with or without an ignitor.

SEE OR SEARCH CLASS

44, Fuel and Related Compositions,

530+, for a fuel product having a defined shape or structure.

60, Power Plants,

39.47, for a solid propellent form in combination with nominal reaction motor casing structure with no nozzle claimed; subclass 251 for a reaction motor with a specific form of an oxidizer or fuel charge within a reaction motor and which charge is adapted to be brought in contact with a fluid fuel or oxidizer, respectively, upon ignition; subclass 252 for a reaction motor with a specific form of a gel propellant within a reaction motor; and subclasses 253+ for a reaction motor having a solid propellant.

86, Ammunition and Explosive-Charge Making,

1, and 20 for methods and apparatus of making a propellent form by other than molding.

149, Explosive and Thermic Compositions or Charges,

2+, for structure or arrangement of component or product.

264, Plastic and Nonmetallic Article Shaping or Treating: Processes,

3+, for explosive or propellant article shaping or treating.