Exercise devices – Support for entire body of user – Swivelled foot platform
Reexamination Certificate
2000-05-12
2001-10-23
Crow, Stephen R. (Department: 3764)
Exercise devices
Support for entire body of user
Swivelled foot platform
C482S075000
Reexamination Certificate
active
06306068
ABSTRACT:
FIELD OF THE INVENTION
The invention pertains to an exercise or amusement device on which a user may stand and which the user may cause to move, by movement of the user's feet or by shifting the user's body weight, for exercise or for amusement.
BACKGROUND OF THE INVENTION
The present invention is directed to improvements over my earlier U.S. Pat. Nos. 4,285,516, 4,530,498, 4,700,947, 5,320,593, and 5,391,134, each entitled “AMUSEMENT AND/OR EXERCISING DEVICE.” The present invention is an exercise or amusement device having an improved centering mechanism which improves upon the devices disclosed in my earlier patents, making it easier for a user to learn to use the device and making it safer for all users.
SUMMARY OF THE INVENTION
In its broad aspect, the invention is an exercising and/or amusement device supported by a ground surface and on which a person may stand. The device comprises a walking beam having first and second platforms at opposite ends thereof for supporting the feet of a person, each platform having an upper surface adapted to support one of the person's feet. A ground engaging element is associated with each platform. Each ground engaging element has a bottom surface for engaging a ground surface, a hemispherical supporting surface, and a pin extending from the hemispherical supporting surface. Each platform is pivotably connected to an associated ground engaging element by a pivotable connection comprising a curved concave bottom surface on each platform shaped complementary to the hemispherical supporting surface of the associated ground engaging element and having a slot therein through which the pin of the associated ground engaging element extends. A plurality of resilient members engages the pin and urges it toward a neutral position. The resilient members are oriented such that extension of at least one of the resilient members applies a restoring force to the pin along a longitudinal axis of the walking beam.
REFERENCES:
patent: 735319 (1903-08-01), Urwick
patent: 1565484 (1925-12-01), McWhirter
patent: 4285516 (1981-08-01), Heatwole
patent: 4530498 (1985-07-01), Heatwole
patent: 4700947 (1987-10-01), Heatwole
patent: 5320593 (1994-06-01), Heatwole
patent: 5391134 (1995-02-01), Heatwole
patent: 5795277 (1998-08-01), Bruntmyer
Crow Stephen R.
Drinker Biddle & Reath LLP
Elrey Enterprises Inc.
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