Hydraulic door closer with fluid overflow chamber
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United States of America Patent
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Aug 31, 2021
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N/A
app pub date -
Aug 5, 2019
filing date -
Dec 31, 2015
priority date (Note) -
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Abstract
This disclosure is generally directed to a hydraulic door closer, and more specifically is directed to a hydraulic storm or screen door closer that has a fluid overflow chamber providing fluid volume and pressure control for both expanded and contracted fluid at different temperatures. The disclosed hydraulic door closer comprises a fluid overflow chamber adapted to hold sufficient fluid to maintain required operating fluid or oil levels at different temperatures, and to ensure proper closer performance under both extreme high and low temperature conditions.
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