Threaded – headed fastener – or washer making: process and apparat – Implement – e.g. – die – etc. – Screw threading die
Patent
1992-04-28
1993-07-06
Larson, Lowell A.
Threaded, headed fastener, or washer making: process and apparat
Implement, e.g., die, etc.
Screw threading die
B23G 500
Patent
active
052249000
ABSTRACT:
A bolt and screw repairing tool comprises mainly a main body, a rotating cutting and pressing body, and a positioning cutting and pressing body. The main body comprises a handle, a protruded portion, and a recessed portion. The protruded portion is provided with a through hole and a threaded hole in communication with the through hole. The threaded hole receives a thumbscrew. The protruded portion further comprises a slot. The recessed portion is provided with a receiving hole. The rotating cutting and pressing body comprises a clamping head having a cutting and pressing plate with a triangular edge attached thereto. The rotating cutting and pressing body is received securely in the receiving hole of the recessed portion of main body by means of a shaft which can be rotated to the left and to the right for an angle of 15 degrees respectively. The positioning cutting and pressing body comprises a vertical cutting and pressing plate fastened to a long threaded rod emerging from other side of main body by passing through the through hole and engaging with adjusting wheel. The cutting and pressing bodies are used to clamp the damaged work piece (bolt) for repairing by rotating the main body to move along the paths of threaded portion of the work piece (bolt).
REFERENCES:
patent: 2016735 (1935-10-01), Abramson et al.
patent: 2064661 (1936-12-01), Hammond
patent: 3688323 (1972-09-01), Bouck
patent: 3793659 (1974-02-01), Edgar
patent: 4150450 (1979-04-01), Laub, Jr. et al.
patent: 5060330 (1981-10-01), Stahl
Larson Lowell A.
Lei Alfred
McKeon Michael J.
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