Method and apparatus for tightening or loosening screw-type conn

Details Method and apparatus for tightening or loosening screw-type conn Method and apparatus for tightening or loosening screw-type conn

1986-06-13

1987-11-24

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310311, 310323, 310317, 310319, 73DIG4, 7386223, 7386241, 7386259, 173 5, 81469, 81479, H01L 4108

Patent

active

047091827

ABSTRACT:
A method and apparatus for tightening or loosening screw-type connections, in which the screw bolt is stimulated to oscillate longitudinally, the natural frequency of the bolt is measured and the excitation frequency is made to follow the changing natural frequency during the bolting process with a minimum, necessary excitation energy, so that the screw bolt attains a permanent state of resonance.

REFERENCES:
patent: 3511323 (1970-05-01), Riley, Jr.
patent: 3561462 (1971-02-01), Jugler
patent: 3614484 (1971-10-01), Shoh
patent: 3619671 (1971-11-01), Shoh
patent: 3809977 (1974-05-01), Balamuth et al.
patent: 3813616 (1974-05-01), Antonevich
patent: 4065687 (1977-12-01), Mishiro
patent: 4168447 (1979-09-01), Bussiere et al.
patent: 4277758 (1981-07-01), Mishiro
Ultrasonics, article from News in Engineering, Jan. 1966.

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