US PATENT SUBCLASS 173 / 2
AUTOMATIC CONTROL OF POWER OPERATED MEANS

Current as of: June, 1999
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173 /   HD   TOOL DRIVING OR IMPACTING

2AUTOMATIC CONTROL OF POWER OPERATED MEANS {4}
3  DF  .~> Responsive to condition of cleansing means
4  DF  .~> Tool advance causing or controlling means {2}
11  DF  .~> Drive means responsive to condition of advance causing or controlling means
176  DF  .~> Drive means responsive to torque or speed condition {5}

DEFINITION

Classification: 173/2

(under the class definition) Apparatus comprising (1) means for sensing a condition or change of condition, which condition or change of condition may or may not occur, (2) a separate control means and (3) a separate power operated means to initiate, modify, or terminate the functioning of the apparatus, said three means being so related that the sensing means controls operation of the control means and the control means controls operation of the power means, all without the intervention of a human operator.

(1) Note. Apparatus wherein the driven tool constitutes the sensing means and controls the control means for the power operated means is included under this definition only if the control means moves relative to the driven tool. An apparatus having structure integral with or fixed to the tool as the sole means to control the operating means is not considered to be automatic, and is classified on other features.

(2) Note. A valve having one specific area which senses the condition of a fluid, and a completely different area which controls the flow of the same or a different fluid to operate as power means is included under this definition as separate sensing and control means. A valve which senses and controls with the same surface (i.e., a check valve), is not included and is classified on other features.

SEE OR SEARCH THIS CLASS, SUBCLASS:

13+, for a drive controlled by relative axial movement of a tool.

18, for drive controlled by relative movement of advance causing or controlling means or manipulating handle.

58, for work cleansing controlled by relative movement between the drive and tool, advance causing or controlling means or manipulating means. SEE OR SEARCH CLASS

83, Cutting,

72+, for a cutting device having means to monitor a control operation.

172, Earth Working,

2+, for an earth working device having automatic power control.