US PATENT SUBCLASS 248 / 354.1
.~ Adjustable length

Current as of: June, 1999
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248 /   HD   SUPPORTS

351  DF  PROPS AND BRACES {5}
354.1.~ Adjustable length {4}
354.2  DF  .~.~> Held in adjusted position by flowable granular material
354.3  DF  .~.~> Threaded adjusting or locking member {1}
354.5  DF  .~.~> Held in adjusted position by transverse pin in registering apertures
354.6  DF  .~.~> Held in plural discrete positions {1}

DEFINITION

Classification: 248/354.1

Adjustable length:

(under subclass 351) A support which includes a pair of members relatively longitudinally movable with respect to each other to facilitate a change in length of the support.

(1) Note. A patent directed to a removable prop of brace structure which, by disclosure, is hydraulically actuated or is particularly adapted to include or accommodate a force multiplying tool for adjusting the length thereof is proper for Class 254 rather than Class 248. For example, when adjustment in length of the opposite ends of a prop is accomplished by means off a screw and nut, and the nut is hexagonally headed to readily accommodate a wrench, such structure is proper for Class 254; however, merely forming a knurled surface on the nut so as to make it easier to grasp and turn by hand for adjustment will not remove the patent from Class 248.

SEE OR SEARCH CLASS

52, Static Structures (e.g., Buildings),

127.2, for a removably mounted prop or brace combined with a structure component, and subclass 632 for an axially extendable shaft.

254, Implements or Apparatus for Applying Pushing or Pulling Force, appropriate subclasses for devices in the nature of a jack which also serves as a brace, and see (1) Note above.

269, Work Holders,

55+, for a work holder mounted for movement and 289+ for a holder positioned beneath the work.

403, Joints and Connections,

52+, for a joint comprised of articulated members.