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crane strongback

Horizontal movement of the bridge may be accomplished through various types of power drives. m. QM CRANE 5 Sheets-Sheet 4 Filed Oct. 30, 1958 Eran-furs Ear/ fl4\/1asdorf' Ric/76rd 7. of the lug 138, in the manner shown in FIGURE 8. will be rigid in the lateral direction. Other objects and advantages will become more apparent with the disclosure of the preferred embodiments of the invention in connection with the description and showing thereof in the specification, claims, and drawings in which: FIGURE 1 is a front elevational view of an overhead crane assembly embodying the principles of the present invention; FIGURE 2 is an enlarged perspective view of a rack and pinion assembly in the form used in connection with a pantograph guide for the crane; FIGURE 3 is an elevational view showing details of the pantograph assembly; FIGURE 4 is a plan view taken substantially along line IV-IV of FIGURE 3; FIGURE 5 is a horizontal sectional view taken substantially along line V-V of FIGURE 3; FIGURE 6 is a vertical sectional line illustrating the end of the pantograph assembly and taken substantially along line VI-VI of FIGURE 3; FIGURE 7 is a vertical sectional view taken substantially along line VII--VII of FIGURE 3; FIGURE 8 is a vertical sectional view taken substantially along line VIlIVIII of FIGURE 3; FIGURE 9 is a vertical sectional view taken substantially along line IX-IX of FIGURE 5 with additional parts broken away for clarity; FIGURE 10 is a vertical sectional view taken substantially along line XX of FIGURE 5; and, FIGURE 11 is a vertical sectional view taken substantially along line XI-XI of FIGURE 5. As illustrated in FIGURE 11, an interlocking switch 133 has a switch operating plunger 134 which extends into a recess 136. For purposes of description, the end of the load Where the lug 108 is located, will be referred to as being the rear end. Wonderful post Crane Truly inspiring as so many leaders keep it all inside and that inhibits so much, too much. Another requirement of cranes in numerous industries has been that the cranes take little head room, which is the distance from the top of the runway rail to the lowest overhead obstruction. The blocks and slots hold the pinions and racks in nontwisting meshing engagement and support the strongback from the arm 67. The locking plates 109 and 139 are then slid toward each other to locking position by their respective hydraulically operated cylinders 122 and 149, FIGURES 10 and 11. The rated capacity of 10 31, 1922 2,593,630 Thompson Apr. The holding plate 109 has corresponding notches 109a and 109!) In the present embodiment, the bridge is driven by a hydraulic motor acting through gearing to turn a sprocket. For receiving the lug 138 of the load, the plate 139 is slid toward the front end of the strongback and the strongback is lowered over the load. A further object of the invention is to provide an over all crane assembly with improved mechanism for attaching and releasing a load. 2. However, the coronavirus outbreak-led market downturn remains concerning. Lifting Beams Structually able to handle the load through the beam spread allowing for lower headroom designs. To this end, the arms have a flat broad construction and each pivotal connection includes a pair of horizontally spaced bearing points which positively prevent twist of one arm of the pantograph with respect to the connected arm. The patented design allows a large sized foot to be placed in confined areas while still allowing the rig to move in Pushing the limits of compact design, the CompacJac still matches its bigger siblings in capability.

7. 1. 4. The force for raising or lowering the strongback 14 is applied directly to the strongback.

This cable is connected to the anchor 49, passes over sheave 59 of the trolley and is looped down over a sheave 47 on the strongback. Each of the pivotal connections between the arms are so constructed to prevent twist of the pivotal joint.

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