Brushing – scrubbing – and general cleaning
Patent
1978-08-10
1980-03-18
Britts, Ramon S.
Brushing, scrubbing, and general cleaning
85 1R, F16B 3926
Patent
active
041934342
ABSTRACT:
A preassembled bolt and washer-like device designed for use in securing an upper, plastic-like workpiece to a lower support structure so that cold flow of the plastic is minimized while applying a relatively high clamp load to the joint. The washer includes a tubular sleeve having radially inwardly directed protuberances at the upper region of the inner wall designed to snap onto the shank of the bolt and be axially retained and free spinning therein. The upper extremity of the shank of the bolt includes a radial outward protuberance cooperating with the protuberance on the sleeve. The threaded region of the shank extends within the confines of the sleeve so the thread runout at the upper extremity of the shank will not prevent the sleeve from clampingly engaging the lower support structure.
REFERENCES:
patent: 1320259 (1919-10-01), Martens
patent: 1717035 (1929-06-01), Holt
patent: 2159393 (1939-05-01), McCrudden
patent: 2275315 (1942-03-01), Ray
patent: 2779376 (1957-01-01), Poupitch
patent: 2817380 (1957-12-01), Knohl
patent: 3016941 (1962-01-01), Coldren
patent: 3054213 (1962-09-01), Mathues
patent: 3315720 (1967-04-01), Gutshall
patent: 3777796 (1973-12-01), Takano
patent: 4102239 (1978-07-01), Dallas
Beart Robert W.
Britts Ramon S.
Illinois Tool Works Inc.
Thomson Richard K.
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