Method for making a self-drilling and self-tapping screw

Details Method for making a self-drilling and self-tapping screw Method for making a self-drilling and self-tapping screw

1992-12-22

1995-01-17

Larson, Lowell A.

Threaded, headed fastener, or washer making: process and apparat

Process

Making externally threaded fastener, e.g., screw or bolt

409211, B23G 900

Patent

active

053821955

ABSTRACT:
A self-drilling and tapping screw, the self-drilling portion of which is formed in two major operations. A cutting tip is formed on the tip of a screw blank by a pair of rotating circular saw blades in a first operation. A pair of flutes extending from the cutting tip to the threaded portion of the stem are formed by a second pair of rotating circular saw blades in a second operation.

REFERENCES:
patent: 1999264 (1935-04-01), Tilton
patent: 3044341 (1962-07-01), Stern
patent: 3079831 (1963-05-01), Gutshall
patent: 3094893 (1963-06-01), Lindstrom
patent: 3094895 (1963-06-01), Broberg
patent: 3125923 (1964-03-01), Hanneman
patent: 3164851 (1965-01-01), Hanneman
patent: 3207024 (1965-09-01), Sommer
patent: 3231132 (1966-01-01), Hanneman
patent: 3238836 (1966-03-01), Johnson
patent: 3241426 (1966-03-01), Gutshall
patent: 3280412 (1966-10-01), Hanneman et al.
patent: 3288015 (1966-11-01), Hanneman
patent: 3318182 (1967-05-01), Carlson
patent: 3395603 (1968-08-01), Skierski
patent: 3422472 (1969-01-01), Pomernacki
patent: 3438299 (1969-04-01), Gutshall
patent: 3463045 (1969-08-01), Prescott
patent: 3507183 (1970-04-01), Thurston
patent: 3517581 (1970-06-01), Stokes et al.
patent: 3578762 (1971-05-01), Siebol et al.
patent: 3738218 (1973-06-01), Gutshall
patent: 3780389 (1973-12-01), Lindstrom
patent: 3933075 (1976-01-01), Peterson
patent: 4071918 (1978-02-01), Baer
patent: 4138754 (1979-02-01), Baer
patent: 4532663 (1985-08-01), Sygnator
patent: 4565475 (1986-01-01), Sygnator
patent: 4730373 (1988-03-01), Senoh

Affiliated with

Also associated with

Rating

Method for making a self-drilling and self-tapping screw does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method for making a self-drilling and self-tapping screw, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for making a self-drilling and self-tapping screw will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-744390