Column counterbalancing apparatus
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United States of America Patent
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May 4, 1999
Grant Date -
N/A
app pub date -
Aug 19, 1997
filing date -
Aug 19, 1997
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
Counterbalancing apparatus for a lamp column in which an upper part of the latter is pivotally mounted on a fixed lower part so that the upper part can be swung down for lamp servicing, comprises a compression spring assembly or a hydraulic ram arranged to have a bearing engagement with the column parts and to be linked to the lower part in order to safely restrain lowering of the upper part or to counterbalance and assist or effect raising thereof. Alternatively a single or double acting ram or rams have a removable pivotal connection with respective column parts so as to act between them. For mobility and case of application the apparatus is wheel mounted.
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Cited Art Landscape
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