Column counterbalancing apparatus

Details Column counterbalancing apparatus Column counterbalancing apparatus

1997-08-19

1999-05-04

Krizek, Janice L.

Material or article handling

Pole or tree handlers

52116, B66F 1100

Patent

active

058996516

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.

REFERENCES:
patent: 3292320 (1966-12-01), Laharty
patent: 3355847 (1967-12-01), Pratt
patent: 3362116 (1968-01-01), Erickson et al.
patent: 5634759 (1997-06-01), Jenvey

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