Screws having selected heat treatment and hardening

Details Screws having selected heat treatment and hardening Screws having selected heat treatment and hardening

1999-01-13

2000-08-29

Wilson, Neill

Expanded, threaded, driven, headed, tool-deformed, or locked-thr

Externally threaded fastener element, e.g., bolt, screw, etc.

Thread or shank structure

411403, 4113877, 411424, F16B 2300, F16B 2500, F16B 3506

Patent

active

061098515

ABSTRACT:
A carbon steel screw has one or more portions which have been selectively hardened by selective heat treatment and quenching. In one embodiment, an upper portion of the screw head is selectively hardened to prevent or reduce damage when torque is applied using a driving tool. In another embodiment, the screw tip is selectively hardened for more effective penetration into a substrate. Preferably, the selectively heated portions are selectively quenched to reduce or avoid distortion.

REFERENCES:
patent: 2086801 (1937-07-01), Hayden
patent: 2224659 (1940-12-01), Stoll
patent: 2229565 (1941-01-01), Hallowell, Jr.
patent: 3090712 (1963-05-01), Berry
patent: 3301120 (1967-01-01), Lloyd
patent: 3344817 (1967-10-01), Connard
patent: 3376780 (1968-04-01), Tanczyn
patent: 3765660 (1973-10-01), Taylor et al.
patent: 3769103 (1973-10-01), Wardwell et al.
patent: 3983304 (1976-09-01), Sekhon
patent: 4021274 (1977-05-01), Chadwick
patent: 4289006 (1981-09-01), Hallengren
patent: 4295351 (1981-10-01), Bjorklund et al.
patent: 4385081 (1983-05-01), Keller et al.
patent: 4486248 (1984-12-01), Ackert et al.
patent: 4583898 (1986-04-01), Sygnator
patent: 4670310 (1987-06-01), Tengqvist
patent: 4690837 (1987-09-01), Doroszkowski et al.
patent: 4702880 (1987-10-01), Porowski et al.
patent: 4730970 (1988-03-01), Hyner et al.
patent: 4835819 (1989-06-01), Duffy et al.
patent: 4842655 (1989-06-01), Porowski et al.
patent: 4842890 (1989-06-01), Sessa et al.
patent: 4877463 (1989-10-01), Aicher et al.
patent: 5033181 (1991-07-01), Lat et al.
patent: 5120175 (1992-06-01), Arbegast et al.
patent: 5178903 (1993-01-01), Lai et al.
patent: 5283280 (1994-02-01), Whyte et al.
patent: 5302068 (1994-04-01), Janusz et al.
patent: 5403624 (1995-04-01), Dimaio et al.
patent: 5417776 (1995-05-01), Yoshino et al.
patent: 5484244 (1996-01-01), Glovan et al.
patent: 5498659 (1996-03-01), Esser
patent: 5536582 (1996-07-01), Prasad et al.
patent: 5564876 (1996-10-01), Lat
patent: 5605423 (1997-02-01), Janusz
patent: 5605722 (1997-02-01), Esser
patent: 5605952 (1997-02-01), Esser
patent: 5605953 (1997-02-01), Esser
patent: 5609965 (1997-03-01), Esser
patent: 5614262 (1997-03-01), Joesten
patent: 5616367 (1997-04-01), Spearin et al.
patent: 5618372 (1997-04-01), Erdrich et al.
patent: 5655969 (1997-08-01), Lat
patent: 5755542 (1998-05-01), Janusz et al.
Marketing brochure of Elco Industries, Inc., entitled "DRIL-FLEX, A New Concept In Structural Fastening", dated Feb. 1989.

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