US PATENT SUBCLASS 172 / 705
.~ Spring biased or formed tool or tool part

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

681  DF  TOOL, STANDARD OR CONNECTION {32}
705.~ Spring biased or formed tool or tool part {5}
706  DF  .~.~> Plural earth engaging parts relatively movable during operation
707  DF  .~.~> Spring formed tool or standard {1}
709  DF  .~.~> Laterally biased
710  DF  .~.~> Pivoted tool biased beyond pivot
711  DF  .~.~> Leaf or torsion spring

DEFINITION

Classification: 172/705

(under subclass 681) Apparatus in which at least a portion of the earth working element is capable of movement under operating conditions and is resilient or separate resilient means is provided to resist said movement.

SEE OR SEARCH THIS CLASS, SUBCLASS:

117, for driven implements yieldably mounted on a chassis or

frame.

261+, for implements which shift against a spring return device upon overload and see the definition and Notes of subclass 261 for the line.

335+, and 363, for spring-biased hand-guided or propelled implements.

462, for a plurality of tools which are individually spring-biased downwardly during operation and having an actuator for lifting the tools simultaneously for transport on a wheeled frame. 497+, for tools liftable for transport on a wheeled frame and being spring biased during operation.

515, for spring-biased or spring-form weed turners.

544, for a spring-mounted tooth on a rotating carrier.

621, for plural spring-biased tooth bars.

678, for spring-biased draft means.

794, for a scraper mounted between the front and rear ground supports of a vehicle which is spring biased into ground contact.

SEE OR SEARCH CLASS

56, Harvesters,

400, for a spring- formed or biased rake tooth.

111, Planting,

151, for a trip mechanism used on and claimed in combination with a planting machine.

267, Spring Devices, appropriate subclasses for springs of general utility.