Method and apparatus for eliminating free clearances in a press shutheight adjustment mechanism
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United States of America Patent
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Apr 6, 2004
Grant Date -
Nov 27, 2003
app pub date -
May 22, 2002
filing date -
May 22, 2002
priority date (Note) -
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Abstract
An apparatus for use in a press machine eliminates the free clearances present between the threaded portions of a screw and adjustment nut assembled in a shutheight adjustment mechanism. A hydraulic assembly directs a pressurized fluid against an outer periphery of the adjustment nut to effectively compress the adjustment nut and cause its threaded portion to be displaced into interlocking engagement with the threaded portion of the screw. Alternatively, the hydraulic assembly may be arranged to hydraulically pressurize an interior space of the screw to effectively expand the screw and cause its threaded portion to be displaced into interlocking engagement with the threaded portion of the adjustment nut.
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