Device for measuring pre-stressing force in a bolt-nut...

Details Device for measuring pre-stressing force in a bolt-nut... Device for measuring pre-stressing force in a bolt-nut...

2008-04-01

2008-04-01

Noori, Max (Department: 2855)

Measuring and testing

Specimen stress or strain, or testing by stress or strain...

Threaded fastener stress

Reexamination Certificate

active

07350420

ABSTRACT:
A device for measuring pre-stressing force in a bolt
ut connection, comprising a screw nut that is provided with a sensor means for sensing the pre-stressing force. The nut (1) is of standard design, and the nut itself constitutes a sensor body in that, in the outer peripheral surface (2) of the nut, there is machined at least one recess (3) in which there is placed a sensor (4) that is adapted for sensing mechanical stress in the nut, and for providing a signal representing the stress, for transmission to an external recording device.

REFERENCES:
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patent: 4535631 (1985-08-01), Sinha et al.
patent: 4575274 (1986-03-01), Hayward
patent: 4876895 (1989-10-01), Kao
patent: 4889457 (1989-12-01), Hageman
patent: 5044204 (1991-09-01), Leighton
patent: 5049017 (1991-09-01), Reynolds
patent: 5783751 (1998-07-01), Maw et al.
patent: 5890857 (1999-04-01), Herrera
patent: 6789990 (2004-09-01), Harris et al.

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