Chip catching washers

Details Chip catching washers Chip catching washers

1979-08-16

1982-01-26

Britts, Ramon S.

Expanded, threaded, driven, headed, tool-deformed, or locked-thr

Externally threaded fastener element, e.g., bolt, screw, etc.

Pilot end having means enhancing fastening or installation

411542, F16B 2500, F16B 4300

Patent

active

043126162

ABSTRACT:
According to the present invention, a washer is provided for a self drilling screw or like fastening device through which the fastening device passes, said washer defining a cavity capable of capturing the retaining drill chips as they are formed. The washer may include means for positively locating the washer on and over the drill point of the fastening device. The cavity can be formed by a skirt region adapted to surround the fastening device and in one aspect the cavity may include a mastic or like substance capable of securely holding drill chips.

REFERENCES:
patent: 1652648 (1927-12-01), Swangren
patent: 3469490 (1969-09-01), Pearce, Jr.
patent: 3500713 (1970-03-01), Bell
patent: 3516323 (1970-06-01), O'Brien
patent: 3869219 (1975-03-01), Wilson et al.
patent: 4157674 (1979-06-01), Carlson et al.

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