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US 5,671,931 AGranted
Roller skate
OwnerHui-Chin Suinventor
Life of this patent
Estimating the term…
Abstract
A roller skate includes three or more wheels rotatably supported in the lower portion. The front wheel is disengaged from the ground surface when the middle wheel and the rear wheel are in contact with the ground surface, and the rear wheel is disengaged from the ground surface when the middle wheel and the front wheel are in contact with the ground surface. The rear wheel is coupled to the front wheel so as to be driven by the front wheel when the rear wheel is elevated and is not in contact with the ground surface.
Claims2
A roller skate comprising:
- a body including a lower portion,
- a front shaft, at least one middle shaft and a rear shaft rotatably supported in said lower portion of said body,
- a front wheel, at least one middle wheel and a rear wheel secured to said front shaft and said middle shaft and said rear shaft respectively for engaging with a ground surface, said front wheel being arranged to be disengaged from the ground surface when said middle wheel and said rear wheel are in contact with the ground surface, and said rear wheel being arranged to be disengaged from the ground surface when said middle wheel and said front wheel are in contact with the ground surface, and
- means for coupling said rear wheel to said front wheel so as to allow said rear wheel to be driven by said front wheel when said rear wheel is elevated.
1 more element
Dependencies are inferred from the claim text.