Screw with a partially hardened functional tip and process...

Details Screw with a partially hardened functional tip and process... Screw with a partially hardened functional tip and process...

2007-07-24

2007-07-24

Tolan, Ed (Department: 3725)

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

Process

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

C470S010000, C148S587000, C148S643000

Reexamination Certificate

active

10821226

ABSTRACT:
In a process for the production of a screw comprising a low-alloy carbon steel, having a head, an adjoining holding portion and a functional tip which, in the outer region of limited radial depth, is of a greater hardness than the holding portion, in which the screw body is shaped by pressing and rolling and then the functional tip is subjected to a hardening operation, hardening is effected by momentary heating with a high level of energy transfer and subsequent quenching and is limited to portions of the periphery of the functional tip.

REFERENCES:
patent: 3498352 (1970-03-01), Duffy
patent: 3769103 (1973-10-01), Wardwell et al.
patent: 3894570 (1975-07-01), Reynolds
patent: 4021274 (1977-05-01), Chadwick
patent: 5755542 (1998-05-01), Janusz et al.
patent: 6213884 (2001-04-01), McCarty
patent: 6364972 (2002-04-01), Bauer et al.
patent: 6685573 (2004-02-01), Hikosaka et al.
patent: 6855217 (2005-02-01), Suzuki
patent: 2211608 (1972-05-01), None
patent: 22 11 608 (1972-10-01), None
patent: 198 15 670 (1998-11-01), None
patent: 198 53 733 (1998-11-01), None
patent: 198 53 733 (2000-02-01), None
patent: 0 130 749 (1984-06-01), None
patent: 0 130 749 (1989-01-01), None
patent: 57177922 (1982-11-01), None
patent: 58083690 (1983-05-01), None
patent: 2002-130417 (2002-05-01), None
patent: 2000327692 (2002-05-01), None
European Search Report.
German Office Action.

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