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Bolt tightening apparatus

  • US 3,917,224 A
  • Filed: 04/30/1974
  • Issued: 11/04/1975
  • Est. Priority Date: 02/18/1974
  • Status: Expired due to Term
First Claim
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1. Apparatus for tensioning a plurality of screwthreaded fasteners, wherein the improvement comprises:

  • a. pairs of screwthreaded fasteners disposed in flanking relation to respective intermediary fasteners;

    b. first means coacting with each one of said flanking fasteners for applying a tensile force to each flanking fastener;

    c. a plurality of yoke members coacting with said first means and supported above said intermediary fasteners to exert tensile forces on pairs of fasteners flanking said intermediary fasteners;

    d. second means for maintaining said yoke members in such coacting relation with said first means;

    e. abutment means overlying respective intermediary fasteners and disposed to support said yoke members above said intermediary fasteners; and

    f. third means coacting with said yoke members and with said abutments and creating forces in said yoke members that coact with said first means and thereby exert tensile forces in said flanking fasteners.

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