Variable speed drive mechanism with dwell

Details Variable speed drive mechanism with dwell Variable speed drive mechanism with dwell

1994-04-04

1995-09-12

Underwood, Donald W.

Material or article handling

Vertically swinging load support

Grab

901 21, 1984686, 74 52, 7449004, B66C 100

Patent

active

054492688

ABSTRACT:
A variable speed drive mechanism for transferring a workpiece in an accelerated and decelerated motion comprising a pair of spaced carrier arms driven by a main shaft that rotates through a fixed stationary gear. A set of pulleys is mounted between the carrier arms and a flexible drive member drivingly connects the stationary gear and the pulleys. One of the set of pulleys drives a pair of bellcranks each of which is operatively connected to a transfer arm through a roller and cam slot arrangement. The connection between the bellcrank and the transfer arm provides a more desirable acceleration and deceleration movement of the transfer arms.

REFERENCES:
patent: 1786608 (1930-12-01), Halstead
patent: 4530637 (1985-07-01), Mason et al.
patent: 5271757 (1993-12-01), Houben et al.

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