Bus bar screw jack

Abstract

A bus bar screw jack is useful in the removal, inspection, and reinstallation of bus bars. The end of the screw jack which engages the bus bar comprises a channel with a foam rubber coating to nonslidably receive the bus bar. The foam rubber coating also prevents damage to the insulating coating on the bus bar during installation. The screw jack comprises an externally threaded member, an internally threaded member threaded onto the externally threaded member, a support member on one end of the externally threaded member, and a washer interposed between the support member and internally threaded member.

What is claimed is: 
     
       1. A bus bar screw jack for supporting an insulated bus bar during removal and installation, the jack comprising: an externally threaded member having a support receiving end and a foundation end;   a one piece internally threaded member threaded onto the externally threaded member and having a support side facing the support receiving end of the externally threaded member; and   a tubular support member disposed over the support receiving end, the tubular support member having a bushing end resting on the support side of the internally threaded member, and a bus bar receiving end having a channel with a smooth surface conformed to the shape of the bus bar to receive and support the bus bar on the smooth surface without damage to the bus bar during installation.   
     
     
       2. A jack according to claim 1 further comprising a washer disposed over the support receiving end and interposed between the support side of the internally threaded member and the tubular support member. 
     
     
       3. A jack according to claim 1 further comprising a handle attached to the internally threaded member to facilitate rotating the internally threaded member on the externally threaded member. 
     
     
       4. A jack according to claim 1, further comprising a pedestal which rotatably receives the foundation end of the externally threaded member in an unthreaded opening to stabilize the jack. 
     
     
       5. A jack according to claim 1 further comprising a coating on the channel of the bus bar receiving end. 
     
     
       6. A jack according to claim 5 wherein the coating is a compressible rubber to nonslidably receive the bus bar to prevent the bus bar from sliding within the channel. 
     
     
       7. A jack according to claim 1 wherein the externally threaded member comprises allthread and the internally threaded member comprises a nut. 
     
     
       8. A bus bar screw jack to support an insulated bus bar during removal and installation, the jack comprising: an externally threaded member having a support receiving end and a foundation end;   a one piece internally threaded member threaded onto the externally threaded member;   a washer disposed on the support receiving end;   a tubular support disposed over the support receiving end, the tubular support having a bushing end resting on the washer, and a bus bar receiving end comprising a channel with a smooth surface conformed to the shape of the bus bar to receive and support the bus bar on the smooth surface, and   a compressible rubber coating on the channel of the bus bar receiving end of the tubular support to nonslidably hold the bus bar so that the bus bar insulation is not damaged.