Spacer washer for bolted joint

Details Spacer washer for bolted joint Spacer washer for bolted joint

1994-01-21

1995-11-14

Saether, Flemming

Expanded, threaded, driven, headed, tool-deformed, or locked-thr

Washer structure

Spacer

411916, F16B 4302

Patent

active

054661072

ABSTRACT:
A spacer washer 20 (FIG. 2) for disposing between a nut and a turbine casing flange (16, 12 FIG. 5) has a foot end 24 corresponding to the footprint of the nut and extends with wall thickness 25 in one radial direction 28 no further than the nut footprint, to permit minimum spacing pitch, but extends in the orthogonal direction 29 with greater wall thickness 30 to provide support outside the nut footprint for a hydraulic bolt tensioner in a plane displaced from the flange and possibly overhanging part of the casing. The length of the spacer washer may vary from bolt to bolt along the flange to bring nuts from a stepped flange to the same plane and/or increasing the effective bolt length to the nut enables tensile stress to be introduced easier and more accurately.

REFERENCES:
patent: 3707107 (1972-12-01), Bierl
patent: 4326826 (1982-04-01), Bunyan
patent: 4648753 (1987-03-01), Stephan
patent: 5316319 (1994-05-01), Suggs

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