CLAMP APPARATUS
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United States of America Patent
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Issued Date -
Sep 26, 2013
app pub date -
Nov 18, 2011
filing date -
Dec 2, 2010
priority date (Note) -
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status (Latency Note)
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Abstract
A clamp apparatus comprises a guide member with a top wall and a circumferential wall that protrude above a housing and are inserted into a hole of a work. The guide member is inserted into the housing to be movable downward against an advancing unit that pushes the guide member upward, within a locking stroke of downward movement. Through the circumferential wall, a plurality of guide grooves are made at predetermined intervals in circumferential directions. A locking member inserted into each guide groove is biased radially inward by an annular elastic member which is a thin strip. A clamp rod has wedge surfaces engaging with the respective locking members from above, and is clamp-driven downward and unclamp-driven upward by a piston.
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