Metal working – Means to assemble or disassemble – Puller or pusher means – contained force multiplying operator
Patent
1987-04-01
1988-07-05
Echols, P. W.
Metal working
Means to assemble or disassemble
Puller or pusher means, contained force multiplying operator
29251, 29252, 29255, 294265, 173 90, 173122, B23P 1904
Patent
active
047545399
ABSTRACT:
An extractor for removing worm elements which are fastened for rotation on the worm shaft of a worm extruder wherein a frame formed of longitudinal and cross members has a locking device in one of the cross members for holding the worm elements and an opposed, displaceable, pneumatic piston-cylinder unit on another cross member. The piston-cylinder unit has a pressure piston which is extendable axially towards the worm shaft. Between the worm shaft and the piston-cylinder unit is a slide which is displaceable longitudinally and can be engaged by the piston of the piston-cylinder unit. The slide carries an impact device which is pneumatically actuatable and includes an impact shaft for engaging the worm shaft. The locking device includes two clamp jaws which are axially aligned with the impact shaft and the piston and engage the worm profile with an inner profile surface of identical type.
REFERENCES:
patent: Re28151 (1974-09-01), Cook
patent: 3061914 (1962-11-01), Johnston
patent: 4014392 (1977-03-01), Ross
Knoll Arno
Pfaff Gerhard
Worz Wolfgang
Echols P. W.
Werner & Pfleiderer GmbH
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