Class 411/159 - Cross section other than rectangular

Subclass of Class 411 - Expanded, threaded, driven, headed, tool-deformed, or locked-threaded fastener
Definition: Device wherein the material from which the figure is fabricated
No. of patents: 3
Last issue date: 03/09/2004

Number	Title	Issue Date
6702334	Tapered compression ring for flared tube applications A tapered compression ring for flared tube applications includes a generally ring-shaped body having (a) a gap defining a first end and an opposite second end, (b) a first face, (c) an opposite second face, and (d) a central axis. The first face is tapere...	03/09/2004
4958970	Graduated-load spring washer system for screws and threaded fasteners A graduated-load spring washer system for screws and threaded fasteners uses a deflection coil spring of slightly less than one coil with special end configurations for anti-marring. A cross-section of the coil spring is substantially trapezoidal, with th...	09/25/1990
4091853	Screw-locking device A screw-locking device has a stamped cup spring with a solid annular core having closely spaced triangular radial ribs top and bottom. The distance from the peaks of the ribs from the center plane of the core continually decreases from the outer rim of th...	05/30/1978

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