Patent ID: 9415293
Filing Date: 2016-08-16
CPC Classification: A63B

Claim Text:
1. A pull-up fitness exercise machine, comprising a base for securing all components, an upright column fixed to the rear of the base, a top cantilever pivotally coupled to the top of upright column, a linking rope coupled to an end of the cantilever, and an elastic member driven by the other end of the linking rope for constantly pulling a rotary latching plate to rotate appropriately, a pull ring unit installed at the other end of the cantilever and operated together with a pull string and a plurality of pulleys to provide an up and down displacement stroke for pulling the support plate, a rotating rod assembly pivotally coupled to the bottom of the upright column, and the other end of the rotating rod assembly being pivotally coupled to the support plate, an assisted pushing unit installed between the rotating rod assembly and the base and having an adjustable pushing force to provide an appropriate upward pushing force to the support plate, and a linking hook lever coaxially coupled to a first pivot point of the rotating rod assembly and configured to be corresponsive to a hook post of the rotary latching plate for constantly locking the rotating rod assembly and maintaining the support plate at a low static position, wherein the pull ring unit can be pulled to perform an expected motion when the support plate bears a gravitational force, the cantilever is pulled downwardly, and the linking hook lever is released from a locked status relative to the rotary latching plate; and wherein, when the external force of the pull ring unit disappears, the support plate is descended by the gravitational force to resume its original position and locked to a low static position automatically.