Counterbalancing supporting device

Details Counterbalancing supporting device Counterbalancing supporting device

1976-11-01

1978-04-04

Parsons, Jr., Marion

Supports

Brackets

Adjustable

A47F 510

Patent

active

040822443

ABSTRACT:
A device for supporting an object such as a dental x-ray unit on the free end of a vertically pivotal arm, which allows the object to be counterbalanced for stabilized vertical positioning. The supporting device includes a rigid tubular encasement having a pair of articulating knuckles pivotably attached at each end of the encasement, and a counterbalancing mechanism disposed within the encasement and connected at each end to the articulating knuckles, the counterbalancing mechanism including a compression spring having a force adjustment means, a rod disposed through said spring which includes a threaded fastener which engages one end of the compression spring, and linkage arms at each end connecting the rod to the articulating knuckles. The device is characterized by a readily accessible spring tension adjustment allowing job site adjustment to compensate for spring fatigue, improved efficiency and reduced costs resulting from a reduced number of operating parts, and improved operability.

REFERENCES:
patent: 906874 (1908-12-01), Hallowell
patent: 1864756 (1932-06-01), Pieper
patent: 2700524 (1955-01-01), Lauterbach
patent: 2941776 (1960-06-01), Lauterbach
patent: 3433444 (1969-03-01), Smith

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