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US 5,951,406 AGranted
Adjustable see-saw apparatus
OwnerDouglas A Steaneinventor
Life of this patent
Estimating the term…
Abstract
The seesaw device is adjustable as to the lengths of the moment arms on the beam, of the two seats. Children can adjust the moment-arm length of their own seat in order to compensate for weight imbalances between them. A visible display scale informs of the child of the current moment arm setting.
Claims17
See-saw apparatus, comprising a beam (30) pivoted at a fulcrum point to a support, wherein:
- the beam carries respective left and right seats (43), each of which is suitable for receiving a child;
- the apparatus is so arranged that the beam can undergo up/down pivoting movement, relative to the fulcrum point, and the beam is so arranged as to define respective left and right moment arms for each seat;
- characterised in that the apparatus combines the above features with the following features:
- the apparatus includes an operable adjustment means, which, when operated, is effective to allow the length of at least one of the moment arms to be adjusted;
- and the apparatus includes a numerical scale and a visible scale display means (49), which is effective to display numerically the adjusted length of the moment arm.
2 more elements
Dependencies are inferred from the claim text.