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Resistance spot welding gun and transformer assembly

  • US 4,861,959 A
  • Filed: 07/31/1987
  • Issued: 08/29/1989
  • Est. Priority Date: 04/30/1984
  • Status: Expired due to Fees
First Claim
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1. A resistance welding apparatus for forming a weld on a work piece, said apparatus comprising:

  • a transformer having a pair of output terminals;

    a cylinder and piston assembly shiftable axially relative to one another along a cylinder axis and including a piston rod attached to the piston and extending axially from at least one end of the cylinder and piston assembly;

    a pair of electrodes, one of the electrodes being connected to the cylinder and the other electrode being connected to the piston rod;

    flexible connector means for electrically connecting said electrodes to the transformer output terminals; and

    bracket means for slidably attaching the cylinder and piston assembly to the transformer to allow limited movement therebetween along an axis substantially parallel to the cylinder axis and enabling the electrodes to maintain a self-equalizing pressure on the work piece.

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