US PATENT SUBCLASS 416 / 223 R
SPECIFIC BLADE STRUCTURE (E.G., SHAPE, MATERIAL, ETC.)

Current as of: June, 1999
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416 /   HD   FLUID REACTION SURFACES (I.E., IMPELLERS)

223 RSPECIFIC BLADE STRUCTURE (E.G., SHAPE, MATERIAL, ETC.) {18}
224  DF  .~> Having wear liner, sheathing or insert
225  DF  .~> Having spanwise compression means
226  DF  .~> Formed with main spar
227 R  DF  .~> Openwork (e.g., lattice, looped, etc.) {1}
228  DF  .~> Tined or irregular periphery
229 R  DF  .~> Laminated, embedded member or encased material {2}
231 R  DF  .~> Apertured or permeable {2}
232  DF  .~> Hollow {1}
234  DF  .~> Integrally shaped or blended into hub
235  DF  .~> Irregular, flanged or channel forming blade surface {2}
238  DF  .~> Cantilever blade
239  DF  .~> Blade cuff or shank construction
240  DF  .~> Flexible
241 R  DF  .~> Coating, specific composition or characteristic {2}
242  DF  .~> Reverse curve surface
243  DF  .~> Concave surface
223 A  DF  .~> Turbo machine
223 B  DF  .~> Radial flow devices

Unofficial Alpha Subclasses: R A B

DEFINITION

Classification: 416/223

(under the class definition) Apparatus in which the shape, composition or construction of an impeller blade* is specifically recited in a claim.

(1) Note. Patents from Class 415, Rotary Kinetic Fluid Motors or Pumps, subclasses 182.1 and 208.1 - 232, have been cross referenced to this and indented subclasses where particular runner blade structure is claimed. To complete a search for blade shapes, structures, materials, attaching means, etc., appropriate subclasses in Class 415 excepting those noted above, should be considered.

SEE OR SEARCH CLASS

428, Stock Material or Miscellaneous Articles,

544+, for stock materials, e.g., of indefinite length, which are all metal or have adjacent metal components.