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US 8,136,301 B2Granted
Coil spring counterbalance
AssigneeInovadeas, LLLP
InventorDave B. Lundahl
Life of this patent
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Abstract
Disclosed is a pivotable, multi-coil spring counterbalance, and method for using the same, which allows the user to readily attach a desired number of coil springs having chosen forces to a counterbalance connector attached to a vertically movable member, thereby providing an offset for at least a portion of the weight thereof.
Claims8
A counterbalance apparatus, comprising in combination:
- a mounting member having an open channel;
- a pivot member rotatably mounted in the open channel of said mounting member;
- at least one coil spring mounted on said pivot member such that said at least one coil spring can be uncoiled from said pivot member, thereby generating a chosen force;
- a counterbalance connector having a first end and a second end;
- at least one second connector for attaching at least one of said at least one coil springs to the first end of said counterbalance connector, such that a desired force is generated at the second end of said counterbalance connector;
- whereby said pivot member can be rotated into and out of the channel of said mounting member.
3 more elements
Dependencies are inferred from the claim text.