Door mechanism spring assembly
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Aug 23, 1988
Grant Date -
N/A
app pub date -
Jun 17, 1985
filing date -
Jun 17, 1985
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A spring assembly for counterbalancing a door includes a compression spring and tension members engaging opposite ends of the spring. The tension members can be connected in a conventional door mechanism, the assembly replacing ordinary tension springs of the mechanism. The tension members and the spring are maintained in axial alignment during compression of the spring, which can be preloaded as desired. The assembly is fail-safe in that the spring is completely enclosed and the spring, if broken, continues to provide support for the door.
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