US PATENT SUBCLASS 72 / 478
.~.~ Comprising plural sections fixed together in use (e.g., adjustable or collapsible)

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

462  DF  TOOL AND/OR TOOL HOLDER {7}
476  DF  .~ Having unitary tool-face {4}
478.~.~ Comprising plural sections fixed together in use (e.g., adjustable or collapsible)

DEFINITION

Classification: 72/478

Comprising plural sections fixed together in use (e.g., adjustable or collapsible):

(under subclass 476) Apparatus wherein the work-engaging surface is constructed from the surfaces of a plurality of elements, which elements are held rigidly with respect to each other during a deforming operation.

(1) Note. This subclass is a locus of patents disclosing a tool that can be collapsed for insertion into, or removal from, a workpiece.