Wrist exerciser

  • US 5,800,311 A
  • Filed: 12/03/1997
  • Issued: 09/01/1998
  • Est. Priority Date: 07/25/1997
  • Status: Expired due to Term
First Claim
Patent Images

1. A wrist exerciser comprising a spherical casing having a first axis and a second axis substantially perpendicular to each other, a ring received within the spherical casing to be concentric with and rotatable about the first axis with respect to the casing and a spherical rotor received within the ring and having a rotational axis co-linear with the second axis to be rotatable about the second axis with respect to both the casing and the ring, the rotor having an outer surface on which a circumferential groove is formed with a driving hole formed in the groove, a flexible rope having a rigid end receivable in and engageable with the driving hole. The flexible rope being windable around the outer surface of the rotor along the groove through a top opening formed on the casing so that the rotor is driven to rotate about the second axis by pulling to unwind the rope from the rotor, light generation means mounted on the rotor to emit light during the rotation of the rotor.

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