Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Washer structure – Corrugated
Patent
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.
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patent: 4507020 (1985-03-01), Zeitler et al.
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Baumgartner Stefan
Osterle Helmut
Santos Robert G.
SFS Industrie Holding AG
Trettel Michael F.
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