Oscillating mass-based tool with dual stiffness spring

Details Oscillating mass-based tool with dual stiffness spring Oscillating mass-based tool with dual stiffness spring

1997-05-29

1998-12-15

Smith, Scott A.

Tool driving or impacting

Automatic control of power operated means

Drive means responsive to torque or speed condition

173 5, 173 93, 173 935, 173 20, 173117, 173217, 173181, 173183, B25B 1400, B23Q 1709

Patent

active

058486550

ABSTRACT:
Disclosed is a low reaction oscillating mass-based torquing tool wherein an oscillating mass is excited into near resonant oscillation by reversing pulses resulting in increased energy stored in oscillation about a dual stiffness spring which develops a higher torque output with the stiffer spring action in the tightening direction and hence tightens the fastener.

REFERENCES:
patent: 4019589 (1977-04-01), Wallace
patent: 4124026 (1978-11-01), Berner et al.
patent: 4524651 (1985-06-01), Dubiel et al.
patent: 4887499 (1989-12-01), Kipfelsberger
patent: 5094301 (1992-03-01), Wipperman et al.
patent: 5285857 (1994-02-01), Shimada
patent: 5457866 (1995-10-01), Noda
patent: 5492185 (1996-02-01), Schoeps et al.
patent: 5637968 (1997-06-01), Kainec et al.

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