Ventilation Unit for a Vulcanization Mold of a Vehicle Pneumatic Tire
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United States of America Patent
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Issued Date -
Aug 22, 2019
app pub date -
May 8, 2017
filing date -
Jun 6, 2016
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Abstract
Venting unit for a vulcanizing mold of a pneumatic vehicle tire, having a cylindrical housing, which can be pressed into a venting bore of the vulcanizing mold, and a valve insert, which is positioned in the housing and is movable relative thereto and has a valve shank with a valve disk and has a helical compression spring, which surrounds the valve shank and is supported with its one end on the housing and with its other end on the valve disk, the valve shank having a base portion with an outer diameter (d6) which is greater than the inner diameter of the helical compression spring. The valve disk is adjoined by a cylindrical holding portion, onto which the helical compression spring can be firmly fitted, the holding portion having a greater diameter than the base portion, the helical compression spring having at least two closely spaced turns at least at its end that can be fitted onto the holding portion.
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