Exerciser with an adjustable resistance providing member

Abstract

An exerciser includes a base, a post extending upright from the base, a lever pivoted to and extending transversely from the post, a resistance providing member interconnecting the base and the lever, an upper pulley mounted rotatably on a free end of the lever, a lower pulley mounted rotatably on the base, and a string fixed to the base, extending upwardly from the base and over the upper pulley, and downwardly from the upper pulley and over the lower pulley so as to permit rotation of the lever when the string is pulled away from the lower pulley.

We claim:  
     
         1 . An exerciser comprising: 
 a supporting frame having a base with opposite front and rear ends, and an upright post that extends upright from said front end and that has a top end;    a lever having a pivot end that is pivoted to said top end of said upright post so as to permit rotation of said lever relative to said supporting frame, and a free end that is opposite to said pivot end, said lever extending from said upright post in a first transverse direction relative to said upright post;    a resistance providing member interconnecting said supporting frame and said lever so as to provide resistance to rotation of said lever;    a pulley mechanism including an upper pulley unit mounted rotatably on said free end of said lever and including at least an upper pulley, and a lower pulley unit mounted rotatably on said supporting frame, disposed below and aligned with said upper pulley unit, and including at least a lower pulley; and    a string having a free end, and a fixed end that is fixed to said supporting frame, said string extending upwardly from said fixed end to said upper pulley, passing over said upper pulley, extending downwardly from said upper pulley to said lower pulley, and then passing under said lower pulley so as to permit rotation of said lever when said free end of said string is pulled away from said pulley mechanism.    
     
     
         2 . The exerciser of  claim 1 , wherein said resistance providing member includes a hydraulic cylinder that is pivoted to said front end of said base, and a piston that telescopically extends into said hydraulic cylinder and that has a pivot end connected to said lever.  
     
     
         3 . The exerciser of  claim 2 , wherein said lever is formed with a plurality of positioning holes that are aligned along the length of said lever, said resistance providing member further including a coupler and a pin, said coupler being in the form of a U-shaped plate that has two opposing arms which are disposed at two opposite sides of said lever, said pivot end of said piston being pivoted to said opposing arms, said pin extending through said opposing arms and a selected one of said positioning holes so as to position said pivot end of said piston at said selected one of said positioning holes and so as to adjust the resistance provided by said resistance providing member to rotation of said lever.  
     
     
         4 . The exerciser of  claim 3 , wherein said lower pulley is mounted rotatably on said front end of said base, said pulley mechanism further including a side pulley mounted rotatably on said front end of said base and disposed adjacent to and aligned with said lower pulley in said first transverse direction, said string extending laterally from said lower pulley to said side pulley, passing by said side pulley, and then extending laterally from said side pulley in a second transverse direction that is transverse to said first transverse direction and said upright post.  
     
     
         5 . The exerciser of  claim 4 , wherein said pulley mechanism further includes a front pulley that is mounted rotatably on said rear end of said base and that is aligned with said side pulley in said second transverse direction, said string extending from said side pulley to said front pulley and then passing under said front pulley.  
     
     
         6 . The exerciser of  claim 5 , further comprising a chain that is connected to said free end of said string, and a gripping member that is connected to said chain.