Weight stack

Abstract

A weight stack including a stack of weight plates received in a holder cage to move with the cage along guide rods. A selector pin is received through the cage in a passage in a selected weight plate to connect them for movement as a unit. The weight plates are contained in proper alignment within the cage by stationary members received within the cage at appropriate edge portions of the weight plates.

1 . Resistance weight apparatus for use as resistance in the exercise of a human body comprising in combination: a support frame, a weight holder mounted in the frame for movement along the frame, a resistance weight located between opposite portions of said holder, and means releasably interconnecting said weight and holder such that the weight moves together with the holder in response to forces exerted on the holder by an exerciser.  
   
   
       2 . Apparatus defined in  claim 1  where said frame includes at least one elongated guide member extending along the frame and said holder is movable along said guide member.  
   
   
       3 . Apparatus defined in  claim 1  wherein said frame includes a containment member located within said holder for containing the weight.  
   
   
       4 . Apparatus defined in  claim 1  wherein said weight is engageable with a surface at one end of the frame when the holder is in a starting position at one end of the frame.  
   
   
       5 . Apparatus defined in  claim 1  wherein said holder has means for connecting a transmission member for driving the holder in one direction along the frame.  
   
   
       6 . Apparatus defined in  claim 2  wherein said holder has a number of rollers engageable on said guide member.  
   
   
       7 . Apparatus defined in  claim 1  wherein said holder includes an open frame at one end and a yoke at an opposite end interconnected by said opposite portions of said holder, and spaced apertures formed along at least one of said opposite portions for receiving said means for releasably interconnecting said weight and holder.  
   
   
       8 . Apparatus defined in  claim 7  wherein said opposite portions of said holder include elongated members having a series of spaced apertures for receiving said means for interconnecting said weight and holder.  
   
   
       9 . Apparatus defined in  claim 2  including at least one containment member located within the holder between said guide member and said frame for containing said weight.  
   
   
       10 . Apparatus defined in  claim 9  including rollers mounted on opposite end portions of said holder for movement along said guide member.  
   
   
       11 . A weight stack for use as resistance in exercising muscles of the human body comprising in combination: a support frame, a stack of weight plates located within the frame for movement in a generally vertical direction, a pair of elongated guide members fixed in the frame in vertical positions outwardly of said weight plates, a plurality of vertical containment members fixed to the frame between the guide members and opposite sides of the frame for containing said weight plates, a weight holder mounted on said guide members for vertical movement along said guide members, said weight plates being located within opposite side portions of said holder, and means interconnecting said holders and selected numbers of weight plates to provide a predetermined resistance to movement of said holder.  
   
   
       12 . The weight stack defined in  claim 11  wherein said holder has a plurality of rollers engageable along said guide members.  
   
   
       13 . The weight stack defined in  claim 12  wherein said holder includes a yoke, an open frame surrounding said weight plates and spaced below the yoke, and opposite side portions interconnecting said yoke and open frame, and a drive member connected to the yoke for raising the holder.  
   
   
       14 . The weight stack defined in  claim 13  including a plurality of vertically spaced apertures in said opposite side portions of said holder for receiving a selector pin, said weight plates having passages alignable with said apertures in the holder for receiving the selector pin to connect said holder and weight plates for movement together.