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The mobile crawler crane is particular crane designed with either a lattice boom or a telescopic boom. These move upon the crawlers tracks. As this crane is self-propelled, it can move around certain work locations without the need for much set up. Because of their enormous size and weight, crawler cranes are are difficult to transport from one location to another and are fairly costly. The crawler's tracks offer stability to the machinery and allow the crane to function without utilizing outriggers, although, there are some units which do utilize outriggers. Additionally, the tracks provide the movement of the machine.
Early Mobile Cranes
The first mobile cranes were initially mounted to train cars. They moved along short rail lines which were particularly made for the project. When the 20th century arrived, the crawler tractor changed and this brought the introduction of crawler tracks to the construction business and the agricultural industry. Not long after, excavators adopted the crawler tracks and this further featured the versatility of the machinery. It was not long after before crane companies decided that the crawler track market was a safe bet.
The First Crawler Crane
In the 1920s, Northwest Engineering, a crane manufacturer in the USA, mounted its first crane on crawler tracks. It described the new machine as a "locomotive crane, independent of tracks and moveable under its own power." By the middle part of the nineteen twenties, crawler tracks had become the preferred means of traction for heavy crane operations.
The Speedcrane
Developed by Charles and Ray Moore of Chicago, Illinois; the Moore Speedcrane was one of the first to attempt to replicate rail lines for cranes. Manufactured within Fort Wayne, Indiana, the Speedcrane was a steam-powered, wheel-mounted, 15 ton crane. In 1925, a company referred to as Manitowoc Shipbuilding Co, from Manitowoc, Wisconsin recognized the marketability and the potential of the tracked crane. They decided to team up with the Moore brothers so as to manufacture it and go into business.
The Crown RC 5500 Series was built on a vision that focuses on realistic challenges in the workplace. This innovative model features best-in-class ergonomics and comfort and intelligent technology. Keeping the operator comfortable and safe usually leads to more productivity.
3-Wheel Stand-Up Counterbalanced Truck
The company manufactures a 3-Wheel Stand-Up Counterbalanced Truck in capacities ranging from 3000, 3500\three thousand five hundred and four thousand lb. capacity.
Performance Versatility
Crown's RC 5500 have been designed to work efficiently in a busy work setting. Whether it is operating on the dock or in an aisle, this model achieves greatness. It has been made to offer the operator unmatched visibility, unparalleled ride control and the ultimate ergonomics. The exclusive FlexRide technology provided by Crown offers a suspended floorboard in order to eliminate much of the vibration and shock that operators have to work with every day. Interestingly enough, many of the competitor's sit-down truck units could not match the lessened impact levels offered by the RC 5500 Series.
Visibility - From a side-stance position in both directions of travel, this unit provide maximum visibility for the operator. A low-profile offers a clear view mast as well a sculpted chassis enables the operators to be able to clearly see the fender, the fork tips and all around the truck. This optimum view enhances overall safety and reduces damage.
Speed - Through Access 1 2 3 Technology combined with the newest AC traction control, top travel speeds are among the best in the industry and achieved. Performance levels are able to be custom tuned to be able to match the operator's level of skill or the application needs.
Operator Safety & Comfort
Crown's FlexRide has a suspended floorboard that can greatly improve the overall work performance of the employee by improving their comfort and reducing their exhaustion. The constant vibration and shock could result in severe operator exhaustion for those exposed to those motions on a daily basis specially during travel over expansion joints, rough grounds and dock plates.
