Spring washer and method for making the same

Details Spring washer and method for making the same Spring washer and method for making the same

1997-05-27

1998-09-22

Hail, III, Joseph J.

Metal deforming

By use of roller or roller-like tool-element

Included in roller-cluster

723662, 72703, 470 41, 470 42, B21B 1310

Patent

active

058098208

ABSTRACT:
A spring washer improves resistance to loosening of fasteners tightened thereon. The spring washer is stronger than prior art devices. On the upper and lower surfaces of the spring washer, approximately 1/5-1/4 of the width inward from the outer perimeter is formed without V-shaped grooves. The remaining flat portions are formed with V-shaped grooves in various patterns. These V-shaped grooves increase the coefficient of friction and resist loosening of the spring washer.

REFERENCES:
patent: 1999082 (1935-04-01), Buechting
patent: 3497890 (1970-03-01), Coyle
patent: 4285084 (1981-08-01), Brady et al.
patent: 4302136 (1981-11-01), Abe et al.

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