Tool for repairing damaged screw threads

Details Tool for repairing damaged screw threads Tool for repairing damaged screw threads

2005-03-07

2009-12-01

Tolan, Edward (Department: 3725)

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

Implement, e.g., die, etc.

Screw threading die

C470S067000, C470S080000

Reexamination Certificate

active

07625291

ABSTRACT:
There is provided a tool for repair of damaged threads of screws, including a body (2) having a projecting portion (4) for accommodating a screw to be repaired and having two recessed major surfaces; two blades (6, 6′), each having a rear end (32, 32′) hingedly articulated in the body (2) and front end in the shape of a cutting face (46, 46′) substantially fitting the type of thread to be repaired: means (10, 12) to alter the distance between the cutting faces (46, 46′) and the projecting portion (4) to accommodate screws of different diameters, and wherein the rear ends (32, 32′) of the blades (6, 6′) are configured in such a way that they are capable of serving as pivots, whereby the blades (6, 6′) are hingedly articulated to the body (2).

REFERENCES:
patent: 1854389 (1932-04-01), Arndt
patent: 2388790 (1945-11-01), Mackliet
patent: 3688323 (1972-09-01), Bruck et al.
patent: 3793659 (1974-02-01), Edgar
patent: 4150450 (1979-04-01), Laub et al.
patent: 5060330 (1991-10-01), Stahl et al.
patent: 5224900 (1993-07-01), Hai
patent: 5733075 (1998-03-01), Basteck et al.
patent: 6589122 (2003-07-01), Chen
patent: 778 807 (1957-07-01), None

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