US PATENT SUBCLASS 242 / 574.4
.~.~.~.~ Center actuated, pivoted linkage (e.g., umbrella type)

Current as of: June, 1999
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242 /   HD   WINDING, TENSIONING, OR GUIDING

570  DF  COIL HOLDER OR SUPPORT (E.G., SPINDLE, DISPENSER, OR SPOOL) {6}
571  DF  .~ Radially expansible or contractile {8}
572  DF  .~.~ Longitudinally shiftable operator {2}
574  DF  .~.~.~ Shiftable linkage {4}
574.4.~.~.~.~ Center actuated, pivoted linkage (e.g., umbrella type)

DEFINITION

Classification: 242/574.4

Center actuated, pivoted linkage (e.g., umbrella type):

(under subclass 574) Subject matter wherein the elongated coupling means includes plural output levers pivoted at one end to a spindle component and having a free end shifted radially upon axial movement of the input member acting on a midportion of the output levers.