US PATENT SUBCLASS 269 / 203
.~.~ With clamp (or friction) type adjustment-lock

Current as of: June, 1999
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269 /   HD   WORK HOLDERS

86  DF  RELATIVELY MOVABLE JAWS {25}
165  DF  .~ Means for direct manual adjustment of jaw(s) {5}
203.~.~ With clamp (or friction) type adjustment-lock {3}
204  DF  .~.~.~> Pivoted eccentric for applying lock
205  DF  .~.~.~> Plus additional means to release lock
206  DF  .~.~.~> Deformable elastic plug gripping element

DEFINITION

Classification: 269/203

(under subclass 165) Device wherein a mutually immobilizing engagement between adjustable elements of the holder is effected or maintained by mechanism which increases pressure of one element (or part of one) against the other (or part of the other) to cause binding.

(1) Note. Included in this and indented subclasses are lock means with roughened or serrated surfaces to enhance the frictional characteristics of abutting parts. However, the claimed modification, in structural terms, of one surface to coact with an element of another surface is considered to constitute a detent type lock. For example: the recital of "interengageable teeth", "cogs", "racks", "pawls", "dogs", "pins", "ratchet grooves", "lugs", "keys", "studs", "notches", or "fingers" is considered descriptive of detent means; while "roughened" or "serrated" surfaces are deemed frictional surface characteristics for this and indented subclasses.

(2) Note. If the only disclosed means for increasing the pressure to cause binding is a spring means, and/or a simple lever, and/or gravity acting on a "detent" means, then such means is not considered to be a clamp or friction type means, and original placement will be made in subclasses 207+.

(3) Note. If a patent claims both a "detent" type and a clamp or friction type adjustment (e.g., a set screw is used to force a toothed element into engagement with a mating toothed element), original placement will be in this subclass. Thus, if a set screw (or similar) means plus a surface configuration is claimed, whether the surface is considered to be "roughened" or "detent" type is immaterial. However, if no set screw (or similar) means is used to apply or force one configured surface into interengagement with a coacting configured surface, then (1) Note applies.

SEE OR SEARCH THIS CLASS, SUBCLASS:

166+, for patents to a holder with frictional locking means effected by relative tilting or skewing of elements. 207+, especially the indented subclasses 210 and 215.