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Weld head assembly

  • US 5,910,258 A
  • Filed: 03/25/1996
  • Issued: 06/08/1999
  • Est. Priority Date: 03/25/1996
  • Status: Expired due to Term
First Claim
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1. A weld head assembly for forming a weld between two pipes in a nuclear reactor, the pipes having a substantially circular cross sectional shape, said weld head assembly comprising:

  • a mounting ring subassembly comprising a mounting ring configured to be mounted to one of the pipes, at least one motor mounted to said mounting ring, said motor comprising an output shaft having a rotatable spur gear mounted thereto, and a plurality of bevel rollers mounted at spaced locations to said mounting ring, said rollers mounted along a same radial path; and

    a faceplate subassembly secured to said mounting ring subassembly, said faceplate subassembly comprising a faceplate ring, a bevel ring assembly engaged to said faceplate ring and located to rotatably interface with said bevel rollers of said mounting ring subassembly, and a spur gear assembly engaged to said faceplate ring and located to mesh with said rotatable spur gear of said mounting ring subassembly motor so that said faceplate subassembly rotates with said motor spur gear, said bevel ring assembly comprising upper and lower bevel rings and said spur gear assembly comprising upper and lower gear rings, said spur gear assembly further comprising an inner flange and said bevel ring assembly being seated on said inner flange, said bevel ring assembly and said spur gear assembly each having a generally circular shape, the diameter of said spur gear assembly being larger than the diameter of said bevel ring assembly.

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