Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Internally threaded fastener element – e.g. – nut – etc. – Having cap
Patent
1985-08-20
1987-09-15
Smith, Gary L.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Internally threaded fastener element, e.g., nut, etc.
Having cap
411910, F16B 4100
Patent
active
046936556
ABSTRACT:
An internally threaded nut is provided which is to be screwed onto a hub bolt of a vehicle, e.g. an automobile, having, on its outer surface, near the forward or leading end thereof, a plurality of key protrusions oriented in the direction of the axis of the nut, and having also, on its outer surface and rearward of the key protrusions, a modified cylindrical section. The modified cylindrical section is not a true circle and is provided with a first diameter interspersed with several flattened, or larger diameter portions, as viewed in cross-section. The key protrusions are preferably trapezoidal in cross-section, are generally parallel to each other, and each has a specific configuration wherein one or more of the key projections differ in width from the others so as to form a particular combination, which can only be turned by a key element or key socket having matching trapezoidal cavities. Different combinations of trapezoidal elements with differently modified cylindrical sections will require different key sockets. In this manner, a great number of combinations may be employed.
REFERENCES:
patent: D201388 (1965-06-01), Pick
patent: 1861640 (1932-06-01), McCabe
patent: 2371121 (1945-03-01), Basquin
patent: 2372269 (1945-03-01), Golan
patent: 3482481 (1969-12-01), Newell
patent: 3859888 (1975-01-01), Okada
patent: 3885480 (1975-05-01), Muenchinger
patent: 4027572 (1977-06-01), Burge
patent: 4171662 (1979-10-01), Simone
Smith Gary L.
Whitcomb, Jr. Adrian H.
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