Crown Equipment Corporation

Stamco Division, the Monarch Machine Tool Company

Danny L Dunlap

Daniel W Kahlig

Patrick A Soder

Larry A Niemeyer

Martin E Romer

John A Turner

Charles E Huelsman

John H Muhlenkamp

A materials handling vehicle is provided with a frame including an operator's compartment having an entrance, a drive mechanism supported on the frame, a material handling unit coupled to the frame, and a device including an actuator located across the threshold of the entrance of the operator's compartment. The device generates an alert signal when a portion of an operator's body engages the actuator.

Device for a materials handling vehicle

A mandrel assembly in which the mandrel segments are expanded and contracted by means of a draw rod extending through the mandrel and driven by the same motor that rotates the mandrel during winding or unwinding operations. The draw rod is fixed for rotation with the mandrel but is movable longitudinally thereof and is provided with power threads on one end which are in engagement with complementary power threads on a nut member carried by the motor shaft. A drive gear is keyed to the nut member so that it is rotatable with the nut member but capable of movement longitudinally thereof into and out of engagement with a driven gear secured to the mandrel. A nonrotatable gear segment is mounted for shifting movement with the drive gear and moves into engagement with the driven gear as the drive gear is disengaged from the driven gear to lock the mandrel against rotation. When the mandrel, and hence the draw rod, are thus locked against rotation, continued rotational movement of the nut member results in longitudinal movement of the draw rod and radial movement of the mandrel segments.

Mandrel assembly

Growing community of inventors

Minster, OH, United States of America

Danny L Dunlap