US PATENT SUBCLASS 269 / 221
.~.~ Plural means for one jaw

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

86  DF  RELATIVELY MOVABLE JAWS {25}
216  DF  .~ Means to actuate jaw(s) (i.e., apply holding force) {10}
221.~.~ Plural means for one jaw {2}
222  DF  .~.~.~> Plural intergeared screw-nut actuating means
223  DF  .~.~.~> Including means to move nut

DEFINITION

Classification: 269/221

(under subclass 216) Device including two or more mechanisms to move the same jaw.

(1) Note. Patents placed in this subclass require that the claimed holder include at least two force multiplying or bias inducing means acting on the same jaw. The inclusion of means to vary effective speed of jaw movement or jaw force is not such a mechanism. For example, a holder utilizing a differential screw actuator is not considered to have plural means for this subclass.

(2) Note. In the illustration shown below jaw 3 can be moved by the force of both spring 2 and screw 1. [figure]

SEE OR SEARCH THIS CLASS, SUBCLASS:

92, for patents to a clamp couple element with plural actuating means.

241, for patents to a holder with a differential screw actuating means.