Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Impact driven fastener – e.g. – nail – spike – tack – etc. – Multiple prong – e.g. – nailing plate – staple – etc.
Patent
1986-12-22
1988-03-29
Kundrat, Andrew V.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Impact driven fastener, e.g., nail, spike, tack, etc.
Multiple prong, e.g., nailing plate, staple, etc.
4034051, 403283, F16B 1500
Patent
active
047340037
ABSTRACT:
A wood joint connector plate is formed of a thin, rigid metal sheet having numerous narrow, elongated, struck-out openings. The struck-out sheet material is bent perpendicularly at each end of each opening to form a pair of opposing reverse-oriented mirror-image teeth. Each tooth is bent about a lengthwise bend line that is offset relative to the central longitudinal axis of its opening to divide the tooth into a narrow portion and a wide portion along its length. The free end of each tooth is formed as an asymmetrical V-shaped tip, whose apex coincides with the bend line, to provide a short leg terminating the tooth narrow portion and a long leg terminating the tooth wide portion. Each tooth is twisted around its bend line so that its tip short leg extends approximately parallel to the axis of the opening and towards its opposing tooth. The tip long leg extends away from its opposing tooth and its opening at an acute angle relative to the longitudinal axis of the opening. The wide portion of each tooth is divided into a tip outer part and a base part by a crease extending from the free end of the tip long leg to about the point where the base of the tooth is intersected by the longitudinal axis of the opening. The base part generally extends at an angle in the general direction of its opposing tooth, and the tip part is formed with a dished depression.
REFERENCES:
patent: 3633454 (1972-01-01), Schmitt
patent: 4343580 (1982-08-01), Moyer et al.
patent: 4418509 (1983-12-01), Moyer et al.
patent: 4639176 (1987-01-01), Smith et al.
Needham James R.
Smith Glenn C.
Turnbull William T.
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