Large-area washer

Details Large-area washer Large-area washer

1996-06-07

1999-08-10

Trettel, Michael F.

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

Washer structure

Corrugated

411160, 411531, 4053021, F16B 4300, F16B 3924, E04B 700

Patent

active

059348550

ABSTRACT:
A large-surface plain washer (1) has an opening (5) for inserting a fastener. Engagement elements (1) that increase the engagement with a plate and/r web to be fastened are provided at the surface of the washer (1) that faces in the fastening direction. In addition, projecting spacers (17) shaped as tongues (26) that become effective when several washers (1) are stacked are provided at the lower side of the washer (1). The free end of these tongues (26) may be supported on the top side of the plain washer located directly underneath, so that the washers may be stacked without causing the engagement elements (13) of different washers (1) to engage each other. Individual washers (1) may thus be easily separated from a stack of washers (1), either by rotating or by moving the lowermost washer.

REFERENCES:
patent: 1362623 (1920-12-01), Hachberger
patent: 3196919 (1965-07-01), Poopitch
patent: 4507020 (1985-03-01), Zeitler et al.
patent: 4726164 (1988-02-01), Reinwall et al.
patent: 4763456 (1988-08-01), Giannuzzi
patent: 4787188 (1988-11-01), Murphy
patent: 5042142 (1991-08-01), Beach et al.
patent: 5056684 (1991-10-01), Beach et al.
patent: 5069589 (1991-12-01), Lemke
patent: 5350265 (1994-09-01), Kinner
patent: 5803693 (1998-09-01), Choiniere et al.

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