US PATENT SUBCLASS 269 / 172
.~.~ With relative axial shift of screw-nut actuating means

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}
172.~.~ With relative axial shift of screw-nut actuating means {4}
173  DF  .~.~.~> Split nut type {2}
179  DF  .~.~.~> With longitudinally rockable actuating screw {1}
181  DF  .~.~.~> Half nut type {1}
184  DF  .~.~.~> Interrupted thread type {3}

DEFINITION

Classification: 269/172

(under subclass 165) Device having screw-nut type actuating* means one of whose mating threaded components is movable, parallel to the thread helix axis, with respect to the other (without recourse to) and without effecting, the translation and rotation required by interengagement of said mating.

(1) Note. This, and indented subclasses, are characterized by the inclusion of patents to a holder with a common type of actuating means, screw-nut type set forth and defined in subclasses 240+, which provide a fertile field for modifications relative to "quick adjust" or "rapid set" jaw positioning. This subclass and subclasses hereunder are differentiated on the basis of such modifications pertinent to adjustment features.

(2) Note. Subsequent to the relative disengaged shift of the mating components the further movement of said components in mating position causes the jaws to grippingly hold work.

(3) Note. In the illustration shown below B indicates the adjustable position of the screw-nut actuating means wherein the screw element 9 has been turned to permit the insert element 4 to be disengaged from the nut element 1, thus permitting relative axial movement without rotation. A indicates the actuation position of the parts, as the intermeshing of elements causes relative axial movement when screw 9 is rotate. (The illustration is from patent No. 2,620,695 dated December 9, 1952). [figure]

SEE OR SEARCH THIS CLASS, SUBCLASS:

189+, for patents to a holder with screw-nut type actuating means which also locks the jaw adjustment. 240+, for patents to a holder with screw-nut type actuating means, per se.