Handling: hand and hoist-line implements – Hook – hoistline – or grab type – Locking device
Patent
1978-05-01
1979-11-06
Cherry, Johnny D.
Handling: hand and hoist-line implements
Hook, hoistline, or grab type
Locking device
294 93, 294100, B66C 154
Patent
active
041733681
ABSTRACT:
An apparatus employed with elements for transferring articles, such as open mouth containers like glass jars, is actuable to frictionally grip the interior surface of a container during handling. The apparatus includes a cup which forms a cylinder. A post member is mounted in the cylinder and depends downwardly to a point outside the interior of the cup. A piston is slidably mounted within the cup. A flexible element, such as four circumferentially spaced straps, is secured at one end to the piston and at the other end to the post member at a point outside the cup. A duct connects the cup to a controllable source of air pressure. An urging element, such as a coil spring disposed between the post means and the piston, normally urges the piston to the top of the cup. Upon application of air pressure to the cup, the piston is driven downwardly, and the straps flex radially outwardly so as to frictionally grip the interior surface of a container. When air pressure is removed, the spring drives the piston upwardly, and the straps draw inwardly to release the container. Preferably, the post member includes a threaded sleeve mounted to the cup and an adjustment screw which threads into and out of the sleeve to set the initial flexure of the straps to accommodate containers with different mouth sizes.
REFERENCES:
patent: 2800355 (1957-07-01), Vinner et al.
patent: 2863579 (1958-12-01), Meyer
patent: 3052494 (1962-09-01), Williamson
patent: 3075800 (1963-01-01), Rowekamp
patent: 3314714 (1967-04-01), Brubaker
Cherry Johnny D.
The Lodge & Shipley Company
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