Method for producing a nut, screw tap for the performance of...

Details Method for producing a nut, screw tap for the performance of... Method for producing a nut, screw tap for the performance of...

2005-01-11

2005-01-11

Tolan, Ed (Department: 3725)

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

Process

Making internally threaded fastener, e.g., nut

C470S018000, C470S088000, C470S096000, C470S198000, C408S224000

Reexamination Certificate

active

06840866

ABSTRACT:
A method of producing a nut having a drive area and a clamping area, and a screw tap for performing the method. A bore hole running through the clamping and drive areas is produced in a cylindrical manner. The screw tap is screwed into the cylindrical bore until a predetermined position is reached. The screw tap is successively provided, when seen in an axial direction from the front side thereof, with a centering/cutting section, an adjoining cutting section which is used to produce a conical internal screw thread section in the clamping area, and a cutting section which is used to produce a cylindrical internal screw thread section in the drive area.

REFERENCES:
patent: 3378866 (1968-04-01), Vaernes
patent: 4389145 (1983-06-01), Capuano
patent: 4396321 (1983-08-01), Holmes
patent: 5123793 (1992-06-01), Bonstein
patent: 5735658 (1998-04-01), Härle
patent: 5928084 (1999-07-01), Green
patent: 6213885 (2001-04-01), Bachle
patent: 848 899 (1952-09-01), None
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patent: 195 32 709 (1996-03-01), None
patent: 0 460 335 (1991-12-01), None
patent: 335578 (1930-09-01), None
patent: 1045794 (1966-10-01), None
“Gewindebohrer,” IN: TZ f. prakt. Metallbearb., 64. Jg. 1970, Heft 10, Seite 566.

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