US PATENT SUBCLASS 248 / 354.7
.~.~.~ One-way locking (e.g., ratchet)

Current as of: June, 1999
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248 /   HD   SUPPORTS

351  DF  PROPS AND BRACES {5}
354.1  DF  .~ Adjustable length {4}
354.6  DF  .~.~ Held in plural discrete positions {1}
354.7.~.~.~ One-way locking (e.g., ratchet)

DEFINITION

Classification: 248/354.7

One-way locking (e.g., ratchet):

(under subclass 354.6) A support wherein cooperating abutment faces are provided such as to facilitate relative movement in one direction, but which prevent relative movement in the opposite direction unless released by an auxiliary, operator-controlled device.