US PATENT SUBCLASS 172 / 9
.~.~ With manual actuator to select type of condition sensed


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

2  DF  AUTOMATIC POWER CONTROL {5}
7  DF  .~ Draft responsive {5}
9.~.~ With manual actuator to select type of condition sensed


DEFINITION

Classification: 172/9

With manual actuator to select type of condition sensed:

(under subclass 7) Apparatus including means having a manually actuated element which may be set in a plurality of positions, wherein changing the position of the element results in a change in the type of condition (e.g., position of tool, amount of draft force, depth of tool) which causes a change in operation of the apparatus.

(1) Note. This subclass includes those devices having means

to operate the power means to raise or lower the earth working means upon the occurrence of an excess draft force (e.g., excess draft release or overload lift type).

SEE OR SEARCH THIS CLASS, SUBCLASS:

465, for an actuator adapted to lift a tool for transport on a wheeled frame or broadly claimed implement and comprising a servomotor with a follow-up control, or for a device wherein an automatic draft responsive control is converted to a position control so that the automatic draft control is effective only if the device is disassembled.

SEE OR SEARCH CLASS

91, Motors: Expansible Chamber Type,

358+, for expansible chamber motors having working member position responsive feedback control.