US PATENT SUBCLASS 172 / 657
.~ Relatively movable because of operation


Current as of: June, 1999
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172 /   HD   EARTH WORKING

613  DF  PLURAL RELATIVELY MOVABLE TOOLS {14}
657.~ Relatively movable because of operation {1}
658  DF  .~.~> With interconnecting means to prevent independent lateral movement


DEFINITION

Classification: 172/657

(under subclass 613) Apparatus in which the earth working elements are capable of independent movement relative to each other as a result of the operation thereof in the soil.

SEE OR SEARCH THIS CLASS, SUBCLASS:

612, for fabric or flexible earth working elements such as drags including an earth working element having spaced individual or small groups of teeth where each tooth or small

group of teeth may move vertically with respect to each other tooth or group during operation.

619+, for groups of tools which are relatively movable during operation.

643, for implements having spring-formed tools or standards which tools because of their resiliency are relatively movable during operation.

644, for tools which are longitudinally adjustable to and from transverse alignment and which may also be relatively movable during operation. 646, for tools which are laterally adjustable and independently free to move vertically.