Exerciser with Two Rotatable Disks

Abstract

An exerciser includes a hollow base having two openings. Each opening includes at least one first circular groove. Two bearing members are received in the two openinigs, and each has a frame with which a plurality of balls are rotatably engaged. Two disks are rotatably mounted on the two bearing members respectively, and each disk includes at least one second circular groove and teeth defined in an underside thereof. The balls are rotatably engaged between the at least one first circular groove and the at least one second circular groove. A driving gear is located in the hollow base and engaged with the teeth of both of the two disks.

1 . An exerciser comprising:
 a hollow base having two openings, with each opening including at least one first circular groove defined in an inner end thereof;   two bearing members each having a frame with at least one rail, a plurality of holes defined through the at least one rail, and a plurality of balls rotatably received in the holes;   two disks rotatably mounted on the two bearing members respectively, with each each disk having at least one second circular groove defined in an underside thereof, the balls rotatably engaged between the at least one first circular groove and the at least one second circular groove, with each disk having teeth defined in the underside thereof; and   a driving gear located in the hollow base and engaged with the teeth of both of the two disks.   
   
   
       2 . The exerciser as claimed in  claim 1 , wherein a distance between the two disks is substantially a width of a user's shoulders. 
   
   
       3 . The exerciser as claimed in  claim 1 , wherein the two disks each have a central hole and an axis, wherein the two axes extend through the two central holes and the two bearing members and rotatably engage the two disks and the hollow base together.