High intensity peening flaps with fastener, and wheels incorpora

Details High intensity peening flaps with fastener, and wheels incorpora High intensity peening flaps with fastener, and wheels incorpora

1994-10-18

1996-01-30

Jones, David

Metal deforming

By shot-blasting

451465, B21J 500

Patent

active

054872936

ABSTRACT:
A fastener for use with a rotary peening flap to secure at least two overlapping strap portions together. The fastener includes a shaft for extending through apertures in the overlapping strap portions, a head adjoining one end of the shaft, and an elastic washer at the other end of the shaft. The head of the fastener forms an included edge angle of greater than approximately 90.degree. at the intersection of the bottom and side surfaces of the head. The fastener maintains the overlapping portions of the strap under compression to prevent peening debris form becoming lodged between the fastener and the strap and between the overlapping portions of the strap and to prevent slippage between the strap and the fastener and between the strap portions. The elastic washer has sufficient elasticity to maintain compression as the strap portions become substantially thinner over prolonged use. A peening flap incorporating the fastener is also disclosed, as is a hub assembly incorporating the peening flap and fastener.

REFERENCES:
patent: 3834200 (1974-09-01), Winter
patent: 5013811 (1991-05-01), Ross
patent: 5179852 (1993-01-01), Lovejoy et al.
patent: 5203189 (1993-04-01), Lovejoy et al.
patent: 5284039 (1994-02-01), Torgerson
patent: 5298303 (1994-03-01), Kerr et al.
3M "Heavy Duty Roto Peen" (brochure no. 61-5000-9502-3) 3M Abrasive Systems Division, St. Paul, Minnesota, 1993; 4 pages.
3M "Heavy Duty Roto Peen Flap Wheel" Operating and Assembly Instructions (brochure no. 34-7017-9636-8) 3M Abrasive Systems Division, St. Paul, Minnesota, December 1988; 2 pages.

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