Balance training apparatus, and over and under combination
First Claim
1. Balance training apparatus comprising:
- a balance board having an upper footstep surface and lower bearing surface;
a sub-frame framing-in a generally circular framed-in area of the bearing surface;
a generally spherical rolling fulcrum for being crowned by the balance board within the sub-frame as well as for engaging a ground surface at the same time as any part of the framed-in area of the bearing surface, wherein said spherical rolling fulcrum is free to roll sandwiched between said balance board and ground surface unless stopped against any portion of the sub-frame;
wherein the generally circular framed-in area of the bearing surface is characterized by an inside diameter as the generally spherical rolling fulcrum is characterized a nominal outside diameter such that the framed-in area'"'"'s inside diameter encompasses size ratios relative to the rolling fulcrum'"'"'s nominal outside diameter by between about 12½
to 2½ and
6½
to 7.
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Accused Products
Abstract
A balance trainer has a board with a notional nose and tail, a rolling fulcrum for the board to perch on, and at least one hold-down link extending between one end anchored to ground and another end secured to the notional tail of the board. The board as perched on the rolling fulcrum would—in the absence constraint—afford free tipping tilt along at least one axis. However, the hold-down link supplies constraint such that free leash is given to the to the notional tail of the board so long as the hold-down link is slack. But when the nose of the board dives furthest against the hold-down link, the board either deadens in a fixed pitch angle against the tautened hold-down link, or else can be swung laterally a bit, in sort of a monkey-swing fashion in inverse, giving a training experience like riding on a long surf board.
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Citations
12 Claims
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1. Balance training apparatus comprising:
-
a balance board having an upper footstep surface and lower bearing surface; a sub-frame framing-in a generally circular framed-in area of the bearing surface; a generally spherical rolling fulcrum for being crowned by the balance board within the sub-frame as well as for engaging a ground surface at the same time as any part of the framed-in area of the bearing surface, wherein said spherical rolling fulcrum is free to roll sandwiched between said balance board and ground surface unless stopped against any portion of the sub-frame; wherein the generally circular framed-in area of the bearing surface is characterized by an inside diameter as the generally spherical rolling fulcrum is characterized a nominal outside diameter such that the framed-in area'"'"'s inside diameter encompasses size ratios relative to the rolling fulcrum'"'"'s nominal outside diameter by between about 12½
to 2½ and
6½
to 7. - View Dependent Claims (2, 3, 4, 5, 6)
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7. Balance training apparatus comprising:
-
a balance board having an upper footstep surface and lower bearing surface; a sub-frame framing-in a framed-in area of the bearing surface; a generally spherical rolling fulcrum for being crowned by the balance board within the sub-frame as well as for engaging a ground surface at the same time as any part of the framed-in area of the bearing surface, wherein said spherical rolling fulcrum is free to roll sandwiched between said balance board and ground surface unless stopped against any portion of the sub-frame; wherein the framed-in area of the bearing surface is characterized by either maximum inside either diameter or diagonal as the generally spherical rolling fulcrum is characterized a nominal outside diameter such that the framed-in area'"'"'s maximum inside either diameter or diagonal encompasses size ratios relative to the rolling fulcrum'"'"'s nominal outside diameter by between about 12½
to 2½ and
6½
to 7. - View Dependent Claims (8, 9, 10, 11, 12)
-
Specification