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US 7,118,514 B2Granted
Playground equipment
AssigneeBigToys, Inc.
InventorsJohn Underbrink, Joshua Rothacker, Brian Lovgren
Life of this patent
Estimating the term…
Abstract
A playground device, in the nature of a teeter-totter, includes first and second spaced base members. An arcuate rail is coupled to the base members in an upright arc. An arcuate member surrounds at least a portion of the rail and is mounted for to-and-fro movement relative to the rail. User platforms or other user-friendly features are mounted on the tube. A biasing mechanism coacts between the member and the rail to bias the member toward a predetermined preferably central position on the rail, while allowing the tube to move to-and-fro on the rail.
Claims9
Playground device comprising:
- first and second spaced base members;
- an arcuate rail coupled to the base members;
- an arcuate member surrounding at least a portion of the rail;
- the arcuate member mounted for to-and-fro movement relative to the arcuate rail;
- user platforms mounted at each end of the arcuate member;
- and
- biasing means coacting between the arcuate member and the rail to bias the arcuate member toward a predetermined position on the rail, and to allow the arcuate tube to move to-and-fro on the rail.
4 more elements
Dependencies are inferred from the claim text.