Fastener and driver combination
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Aug 14, 1984
Grant Date -
N/A
app pub date -
Jul 14, 1981
filing date -
Jul 23, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A combination of a cruciform recess in a fastener and cruciform driver has driver wings 13 which are narrower than corresponding recess radial grooves 21 and has downwardly tapered grooves and wings such that driving engagement between driver and fastener takes place at the outer upper edges of the recess. There is a relative downward taper between the wing width and groove width and these widths are so selected that the lower ends of the wings are confined by and preferably wedge in the recesses.
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