Screw element extractor

Details Screw element extractor Screw element extractor

1998-10-19

2000-07-04

Hughes, S. Thomas

Metal working

Method of mechanical manufacture

Disassembling

294265, 29252, B23P 1900, B23P 1904

Patent

active

060819839

ABSTRACT:
An apparatus for extracting screw elements from a screw shaft comprises a frame, a stationary clamp mounted on the frame and disposable between open and closed positions, a carriage mounted on the frame for motion toward and away from the stationary clamp, a movable clamp mounted on the carriage for motion therewith and disposable between open and closed positions, a first drive coupled to the stationary clamp for opening and closing the stationary clamp, a second drive coupled to the movable clamp for opening and closing the movable clamp, and a third drive coupled to the carriage for causing motion of the carriage toward and away from the stationary clamp, wherein clamping of a downstream screw element by the stationary clamp, clamping of an upstream screw element by the movable clamp and one or more strokes of the carriage away from the stationary clamp result in removal of the downstream screw element held in place by the stationary clamp from the screw shaft. The procedure is repeated until all the remaining screw elements are removed.

REFERENCES:
patent: 1447766 (1923-03-01), Vignier
patent: 3061914 (1962-11-01), Johnston
patent: 3913893 (1975-10-01), Scherping
patent: 4384395 (1983-05-01), Gietman et al.
patent: 4754539 (1988-07-01), Knoll et al.
patent: 4839955 (1989-06-01), Vannier
Article entitled "Screw-Element Removal Device Type: SDV 53-133" (20 pages) .

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