US PATENT SUBCLASS 297 / 472
.~.~.~.~ Element is permanently deformed; i.e., one-time use

Current as of: June, 1999
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297 /   HD   CHAIRS AND SEATS

464  DF  BODY OR OCCUPANT RESTRAINT OR CONFINEMENT {6}
468  DF  .~ Safety belt or harness; e.g., lap belt or shoulder harness {9}
470  DF  .~.~ With means to absorb energy of acceleration {1}
471  DF  .~.~.~ Deformable or stretchable element {1}
472.~.~.~.~ Element is permanently deformed; i.e., one-time use

DEFINITION

Classification: 297/472

Element is permanently deformed, i.e., one time use:

(under subclass 471) Apparatus in which the change in the configuration of the deformable means is permanent so that the deformable means can be utilized to perform its energy absorption only one time.