Drive for a machine vice
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jun 19, 1990
Grant Date -
N/A
app pub date -
Dec 1, 1988
filing date -
May 6, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A drive for a machine vice having a vice body (8), a fixed jaw (9) and a movable jaw (4), a drive spindle (1) rotatably mounted in a thrust block (6) at one end of the vice body adjacent the movable jaw, a slide or drive nut (29) for the movable jaw cooperatively engaging drive screw threads (30) on the spindle so that rotation of the latter actuates the movable jaw, these parts extending on one side of the thrust block (6), a threaded sleeve (11) mounted in the thrust block, an extension (13) on the drive spindle extending rotatably and slidably through the thrust collar, a chamber drive unit (15) threadedly engaged (14) with extension (13) at one end and threadedly engaged at the other end with crankshaft (16) driven at its outer end by a crank (3) so that the crank rotates the drive spindle. A power amplifier (2) is mounted between and engaged with the crankshaft and drive spindle within the chamber drive unit and a releasable ball type clutch (35) is provided between the crankshaft and chamber drive unit so that force on the crankshaft produced by the crank rotatably drives the chamber drive unit which rotates the drive spindle up to a predetermined torque, after which the ball clutch disengages and the crankshaft alone rotates to operate the power amplifier to move the drive spindle linearly.
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