Device for controlling crane stop angle
AssigneeD & R Crane, Inc.
InventorsJames Henry Schroeder, Byron R. Patrick
Life of this patent
Estimating the term…
Abstract
This disclosure provides a system and method for limiting a swing angle of a jib crane, the jib crane having a jib rotatably mounted to a mast. The device can have a collar having a collar height and a collar width, the collar being configured to be fit to the mast at a stop height. The device can also have one or more stopping tabs enagagable with the collar and configured to be positioned on the collar at one or more points about a circumference of the mast. The stop height can place the one or more stopping tabs in a position coincident with the jib to interfere with the swing angle of the jib. The method can use the device to limit the angle through which the jibe crane can swing unimpeded.
Claims15
A device for limiting a swing angle of a jib crane, the jib crane having a jib rotatably mounted to a mast, the device comprising:
- a collar configured to be fit to the mast at a stop height;
- and
- one or more stopping tabs enagagable with the collar and configured to be positioned on the collar at one or more points about a circumference of the mast, the stop height placing the one or more stopping tabs in a position operable to interfere with the jib to limit the swing angle of the jib.
A method for limiting a swing angle of a jib crane, the jib crane having a jib rotatably mounted to a mast, the method comprising:
- determining a stop height on the mast coincident with a portion of the jib;
- securing a collar at the stop height on the mast, the collar configured to be slidably fit around the mast;
- engaging one or more stopping tabs with the collar at one or more points about a circumference of the mast, the stop height placing the one or more stopping tabs in a position coincident with the jib;
- and
- limiting an effective swing angle of the jib based on the one or more points.
An apparatus for limiting a swing angle of a jib crane, the jib crane having a jib rotatably mounted to a mast, the apparatus comprising:
- means for limiting an effective swing angle of the jib by interfering with the rotation of the jib;
- means for securing the means for limiting at a stop height on the mast;
- and
- means for engaging the means for limiting with the means for securing at one or more points about a circumference of the mast, the stop height placing the means for limiting in a position coincident with the jib.
Dependencies are inferred from the claim text.