US PATENT SUBCLASS 72 / 67
BY USE OF TOOL ACTING DURING RELATIVE ROTATION BETWEEN TOOL AND WORK ABOUT INTERNAL CENTER (E.G., GYRATING OR ROTATING TOOL)

Current as of: June, 1999
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72 /   HD   METAL DEFORMING

67BY USE OF TOOL ACTING DURING RELATIVE ROTATION BETWEEN TOOL AND WORK ABOUT INTERNAL CENTER (E.G., GYRATING OR ROTATING TOOL) {10}
68  DF  .~> With metal deformation of different type
69  DF  .~> With modification or control of temperature of work, tool or machine, or with lubrication thereof
70  DF  .~> With cutting of work or product {2}
73  DF  .~> With oscillation of work about work-axis
74  DF  .~> With oscillation of work-engaging tool surface about work surface
75  DF  .~> Spherical tool
76  DF  .~> Work-hammering tool
77  DF  .~> With tool surface orbiting around axis parallel to direction of travel of longitudinally moving work {2}
80  DF  .~> During rotation of work {12}
112  DF  .~> Tool orbiting or rotating about an axis {8}

DEFINITION

Classification: 72/67

BY USE OF TOOL ACTING DURING RELATIVE ROTATION BETWEEN TOOL AND WORK ABOUT INTERNAL CENTER (E.G., GYRATING OR ROTATING TOOL):

(under the class definition) Subject matter comprising a tool, or a step of using a tool, that turns with respect to work, or with respect to which tool the work turns, about an axis (or effective axis) that extends through the work, which tool engages the work for deformation while the turning occurs.

(1) Note. For the purposes of this and indented subclasses, the following movements are defined:

(a)

"Gyration" is turning of each point on the surface of a body about an axis specific to each point while the body as a whole remains oriented in the same compass direction. Since all the axes are parallel to each other, they form effectively the equivalent of one axis to fit the definition of the subclass. The movement can be illustrated by the movement of a pencil during the formation of the letter "O". Many of the patents in this subclass (67) disclose the use of a gyrating tool.

(b)

"Rotation" is turning of each point on the surface of a body about a single axis common to all such points. In general usage, rotation is the term often used to describe movement of the moon around the earth or of the earth around the sun, as well as movement of the earth about its own axis; however, in the subclasses indented below, the term "orbit" (and its variants) has been used to describe the former two types of movement, and the term "rotation" has been used to describe turning of a body about its own axis.

(c) "Oscillation" is swinging to-and-fro of each point on the surface of a body about a single axis common to all such points. Disclosure of such movement, occurring during deformation of work, is particularly provided for in subclasses 73 and 74.

(2) Note. The term "turns" is intended to include only that movement wherein all the work turns, or wherein the tool-face turns relatively to all of the work. Disclosures wherein a portion of the work turns and another portion does not turn will be found in other subclasses of this schedule. An exemplary locus of such disclosures is subclasses 64+.

(3) Note. The phrase "relative rotation" is intended to include a clear disclosure of turning about an axis wherein the axis passes through, or extends within, the confines of work as the work exists before deformation. It is not intended that this group of subclasses be the locus of disclosures wherein a product* rotates about a centerline unless the product centerline is also the work centerline. Thus, a device which deforms metal about a centerline or axis-of-bend*, wherein either the tool rotates about the centerline of the product (not the work centerline), or the product rotates about its centerline (not the work centerline), will be found in other subclasses of Class 72. Exemplary loci of such disclosures include subclasses 135+, 146+, and 212+.