Weight lifting apparatus with auxiliary weights

Abstract

An adjustable weight lifting apparatus includes a weight lifting device to which a desired amount of weight is attached by attaching a desired number of weight disks and/or auxiliary weights to the weight lifting device. Weight disks are attached to or detached from to the weight lifting device by intermittently advancing pins from or retracting pins into the weight lifting device. Auxiliary weights in differing amounts can be provided to facilitate adjustment of the amount of weight attached to the weight lifting device in smaller amounts than is achieved by attaching or detaching individual weight disks. The weight disks can be prevented from moving radially relative to each other by protrusions and mating recesses on the weight disks. The protrusions can be removably attached to the weight disks.

What is claimed is: 
     
         1 . A weight lifting apparatus, comprising:
 a weight lifting device, comprising
 a handle, 
 a first cam non-rotatably mounted on the handle, 
 a second cam non-rotatably mounted on the handle, 
 a housing rotatably mounted on the handle, the handle being rotatable relative to the housing, 
 a first cam follower disposed in the housing and in contact with a first cam surface of the first cam and radially movable between a first cam follower retracted position and a first cam follower extended position, and 
 a second cam follower disposed in the housing and in contact with a second cam surface of the second cam and radially movable between a second cam follower retracted position and second cam follower extended position. 
   
     
     
         2 . The weight lifting apparatus as set forth in  claim 1 , wherein, upon rotation of the handle relative to the housing to a first position, the first cam follower is in the first cam follower extended position. 
     
     
         3 . The weight lifting apparatus as set forth in  claim 2 , further comprising a first weight having a first axially extending opening in which the handle is receivable, the first weight having a first radially extending opening, wherein, when the handle is received in the first axially extending opening of the first weight and the handle is rotated relative to the housing to the first position, at least a portion of the first cam follower is received in the first radially extending opening of the first weight. 
     
     
         4 . The weight lifting apparatus as set forth in  claim 3 , further comprising a second weight having a second axially extending opening in which the handle is receivable, the second weight having a second radially extending opening, wherein, when the handle is received in the second axially extending opening of the second weight and the handle is rotated relative to the housing to a second position, at least a portion of the second cam follower is received in the second radially extending opening of the second weight. 
     
     
         5 . The weight lifting apparatus as set forth in  claim 2 , wherein, upon rotation of the handle relative to the housing to a second position, the first cam follower is in the first cam follower retracted position. 
     
     
         6 . The weight lifting apparatus as set forth in  claim 5 , wherein, upon rotation of the handle relative to the housing to the second position, the second cam follower is in the second cam follower extended position. 
     
     
         7 . The weight lifting apparatus as set forth in  claim 5 , wherein, upon rotation of the handle relative to the housing to the second position, the second cam follower is in the second cam follower retracted position. 
     
     
         8 . The weight lifting apparatus as set forth in  claim 5 , wherein upon rotation of the handle relative to the housing to a third position, the first cam follower is in the first cam follower extended position and the second cam follower is in the second cam follower extended position. 
     
     
         9 . The weight lifting apparatus as set forth in  claim 8 , wherein the second weight has a second radially extending opening and when the handle is received in the first axially extending opening of the first weight and in the second axially extending opening of the second weight and the handle is rotated relative to the housing to the third position, at least a portion of the first cam follower is received in the first radially extending opening of the first weight and at least a portion of the second cam follower is received in the second radially extending opening of the second weight. 
     
     
         10 . The weight lifting apparatus as set forth in  claim 8 , wherein upon rotation of the handle relative to the housing to a fourth position, the first cam follower is in the first cam follower retracted position and the second cam follower is in the second cam follower retracted position. 
     
     
         11 . The weight lifting apparatus as set forth in  claim 10 , wherein, when the handle is received in the first axially extending opening of the first weight and in the second axially extending opening of the second weight and the handle is rotated relative to the housing to the fourth position, no portion of the first cam follower is received in the first radially extending opening of the first weight and no portion of the second cam follower is received in the second radially extending opening of the second weight. 
     
     
         12 . The weight lifting apparatus as set forth in  claim 5 , wherein upon rotation of the handle relative to the housing to a third position, the first cam follower is in the first cam follower retracted position while the second cam follower is in the second cam follower retracted position. 
     
     
         13 . The weight lifting apparatus as set forth in  claim 12 , wherein the second weight has a second radially extending opening and when the handle is received in the first axially extending opening of the first weight and in the second axially extending opening of the second weight and the handle is rotated relative to the housing to the third position, no portion of the first cam follower is received in the first radially extending opening of the first weight and no portion of the second cam follower is received in the second radially extending opening of the second weight. 
     
     
         14 . The weight lifting apparatus as set forth in  claim 1 , further comprising a first weight having a first axially extending opening in which the handle is receivable, the first weight having a first radially extending opening, at least a portion of the first cam follower being receivable in the first radially extending opening when the handle is received in the first axially extending opening. 
     
     
         15 . The weight lifting apparatus as set forth in  claim 14 , further comprising a second weight having a second axially extending opening in which the handle is receivable, the second weight having a second radially extending opening, at least a portion of the second cam follower being receivable in the second radially extending opening when the handle is received in the second axially extending opening. 
     
     
         16 . The weight lifting apparatus as set forth in  claim 1 , wherein the first cam has at least one first cam lobe and the second cam has at least one cam lobe, and the first cam and the second cam have a different number of cam lobes. 
     
     
         17 . The weight lifting apparatus as set forth in  claim 16 , wherein a point at a maximum distance from a center axis of the handle on at least one of the at least one first cam lobes and a point at a maximum distance from the center axis of the handle on at least one of the at least one second cam lobes are disposed at a same angular position relative to the center axis of the handle. 
     
     
         18 . The weight lifting apparatus as set forth in  claim 17 , wherein the first cam follower and the second cam follower are disposed in the housing at different axial positions along a longitudinal axis of the housing. 
     
     
         19 . The weight lifting apparatus as set forth in  claim 18 , wherein the first cam has more cam lobes than the second cam. 
     
     
         20 . The weight lifting apparatus as set forth in  claim 1 , wherein, at different axial positions along the handle than the first cam, the second cam, and the housing, a second first cam is non-rotatably mounted on the handle, a second second cam is non-rotatably mounted on the handle, and a second housing is rotatably mounted on the handle. 
     
     
         21 . The weight lifting apparatus as set forth in  claim 20 , wherein the first cam and the second cam are mounted on the handle at different axial positions from each other along the longitudinal axis of the handle, and the second first cam and the second second cam are mounted on the handle at different axial positions from each other along the longitudinal axis of the handle. 
     
     
         22 . The weight lifting apparatus as set forth in  claim 21 , wherein the first cam has more cam lobes than the second cam. 
     
     
         23 . The weight lifting apparatus as set forth in  claim 22 , wherein the first cam and the second first cam are mounted on the handle axially between the second cam and the second second cam. 
     
     
         24 . The weight lifting apparatus as set forth in  claim 1 , wherein the first cam follower includes a pin extending in a direction of a longitudinal axis of the handle, and the first cam includes a groove in which the pin is received. 
     
     
         25 . The weight lifting apparatus as set forth in  claim 24 , wherein the second cam follower includes a second pin extending in the direction of the longitudinal axis of the handle, and the second cam includes a second groove in which the second pin is received.