Exercise Machine Having Safety Feature On The Weight Selection Pin

Abstract

Safety selection pin for weight stack selection system wherein the mid portion of the selection pin is machined down in diameter, forming a shoulder on the edge of the cut out portion. The length of the cut is slightly longer than the diameter of the central stem, or longer than the engaging portion of a link-connector in a “stemless” system, preventing the selection pin from being pulled out during the loaded state of a weight stack exercise machine, thus helping to avoid accidental injuries to users and nearby people.

1 . Exercise machine having safety feature in the selection pin, comprising: 
 a. A central stem;    a. A plurality of weight plates stacked vertically each having a central hole to slidably receive said central stem; and,    c. A safety selection pin that can be slidably fitted through a side hole of each weight plate wherein the a length of the mid portion of the safety selection pin is machined down in diameter, so that the length of the reduced diameter portion is slightly longer than the diameter of said central stem, forming a shoulder on the safety selection pin to prevent being pulled out during loaded state of the exercise machine.    
   
   
       2 . Exercise machine having safety feature in the selection pin, comprising: 
 a. A central stem;    b. A plurality of weight plates where each weight plate further having a built-in push-in/switch for engaging the selection pin into the central stem; and,    c. A safety selection pin on each of the weight plate wherein the a length of the mid portion of the safety selection pin is machined down in diameter, so that the length of the reduced diameter portion is slightly longer than the diameter of said central stem, forming a shoulder on the safety pin to prevent being pulled out during loaded state of the exercise machine.    
   
   
       3 . Exercise machine having safety feature in the selection pin, comprising: 
 a. A plurality of weight plates where each weight plate further having a corresponding link-connector and a corresponding hole on the link-connector and plate for engaging a safety selection pin to select desired weight; and,    b. A safety selection pin on each of the weight plate wherein the a length of the mid portion of the safety selection pin is machined down in diameter, so that the length of the reduced diameter portion is slightly longer than the diameter of engaged portion of the link-connector, forming a shoulder on the safety selection pin to prevent being pulled out during loaded state of the exercise machine.