Adjustable arm on an exercise device

Abstract

A cable-operated exercise device includes an adjustable arm. The adjustable arm includes an adjustment mechanism that is operable by a single hand. To adjust the vertical angular position of the arm, the user pulls a pin out of a positioning hole on an adjustment plate. The arm is counterbalanced about a pivot connection so that the position of the arm does not change when the pin is pulled out of the positioning hole. The user then moves the arm into a second position and puts the pin back into a second positioning hole.

1 . (canceled) 
     
     
         2 . An exercise device, comprising:
 a frame;   a flywheel supported by the frame;   a cable connected to the flywheel, wherein an extension of the cable is configured to rotate the flywheel;   an arm connected to the frame, the arm comprising a pulley system routing the cable to the flywheel;   a pivot connection between the arm and the frame, an angular position of the arm relative to the frame being adjustable about the pivot connection;   a counterweight connected to the arm at the pivot connection, the counterweight configured to counterbalance the arm about the pivot connection; and   an adjustment mechanism to adjust the angular position of the arm about the pivot connection, comprising:
 an adjustment plate comprising a plurality of holes; and 
 an adjustment dial connected to and rotationally fixed to the arm and the counterweight, the adjustment dial comprising a pin that is insertable into a hole of the plurality of holes. 
   
     
     
         3 . The exercise device of  claim 2 , wherein the adjustment dial comprises a biasing element configured to bias the adjustment dial toward a closed position. 
     
     
         4 . The exercise device of  claim 2 , wherein the adjustment dial is movable between a closed position and an open position, wherein:
 in the closed position, the pin is inserted into the hole of the plurality of holes, and   in the open position, the pin is removed from all holes of the plurality of holes.   
     
     
         5 . The exercise device of  claim 4 , wherein the adjustment dial is moveable parallel to a rotation axis of the pivot connection. 
     
     
         6 . The exercise device of  claim 4 , wherein, when the adjustment dial is in the open position, the arm has a net torque of zero about the pivot connection. 
     
     
         7 . The exercise device of  claim 4 , wherein, when the adjustment dial is in the open position, the angular position of the arm is adjustable with an applied torque of 3 Newton-meters (Nm). 
     
     
         8 . The exercise device of  claim 7 , wherein the applied torque is less than 20 Nm. 
     
     
         9 . The exercise device of  claim 2 , wherein the angular position of the arm is a vertical angular position. 
     
     
         10 . The exercise device of  claim 2 , wherein the adjustment dial is coaxial with the pivot connection. 
     
     
         11 . The exercise device of  claim 2 , wherein the adjustment plate is rotationally fixed to the arm. 
     
     
         12 . The exercise device of  claim 2 , wherein the pivot connection has a vertical axis of rotation. 
     
     
         13 . The exercise device of  claim 2 , wherein the adjustment dial is configured to be operated by a single hand of a user. 
     
     
         14 . The exercise device of  claim 13 , wherein the user can adjust the angular position of the arm without removing the single hand of the user from the adjustment dial. 
     
     
         15 . The exercise device of  claim 2 , wherein the cable is retractable by a retraction mechanism connected to the flywheel. 
     
     
         16 . The exercise device of  claim 15 , wherein the retraction mechanism comprises a ratcheting hub configured to allow transfer of torque in a first rotational direction but not in a second rotational direction. 
     
     
         17 . The exercise device of  claim 2 , wherein the arm comprises a distal end and a proximal end, and wherein the proximal end is connected to the pivot connection. 
     
     
         18 . The exercise device of  claim 17 , wherein the cable routes through the pulley system to position a handle connected to the cable near the distal end of the arm. 
     
     
         19 . The exercise device of  claim 2 , wherein the plurality of holes are positioned to provide discrete angular positions for the arm. 
     
     
         20 . The exercise device of  claim 2 , wherein the counterweight is connected to the exercise device only at the pivot connection. 
     
     
         21 . The exercise device of  claim 2 , wherein the flywheel comprises a resistance mechanism configured to impede rotation of the flywheel.