Lifting apparatus
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United States of America Patent
Stats
-
Aug 25, 1987
Grant Date -
N/A
app pub date -
Nov 1, 1985
filing date -
Nov 6, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Lifting apparatus including a base, a platform disposed above the base, a thrust device therebetween to lift the platform relative to the base, and a platform stabilizer enclosed within the thrust device to connect the platform and base in parallel. The platform stabilizer includes an upper extensible linkage device having upper end portions connected to the platform, a lower extensible linkage device having lower end portions connected to the base, and connecting arrangement connecting lower end portions of the upper extensible linkage device to upper end portions of the lower extensible linkage device so that the linkage devices are constrained to move in unison.
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