Elevator – industrial lift truck – or stationary lift for vehicle – Inclined elevator
Reexamination Certificate
1999-06-14
2001-01-09
Olszewski, Robert P. (Department: 3652)
Elevator, industrial lift truck, or stationary lift for vehicle
Inclined elevator
C187S239000, C187S261000
Reexamination Certificate
active
06170613
ABSTRACT:
The present invention relates to scaffolding, and more particularly to an autonomous multi-position working platform unit intended especially for repair and renovation work of large scale construction structures such as hydroelectric dams or other civil engineering works.
BACKGROUND
The repairing of dams is carried out in environments that involve many constraints: infrastructure having an important slope; work surfaces varying between 0-90°; security of the workers; important weight of the equipment, and vibrations produced by certain types of equipment (e.g. drill); delays for the work; complex installations; required precision in the work achievement; non conventional scaffolding; limited workspace; difficult and limited access; cluttering of the work areas.
The execution of the work requires complex logistics which must adapt to the environmental conditions and ensure the security of the workers. At this time, the work is carried out on precarious installations that do not respect certain or all of the aforesaid constraints.
The conventional method for the execution of the work on dam runners requires the full-time mobilization of a crane, the continuous moving of scaffolding, the operation of tools on various work surfaces, a constricting security program, many persons to meet the needs of the workers, exhausting work for the drillers, long delays in the fulfilment of the work, etc. For example, the project manager establishes the work methods and the appropriate directives, and plane the intervention of subcontractors, the site operations, the various work stages, the work schedule and the budgets. He proceeds with the purchase and rental of the material, equipment and other required elements, and then to the design of the scaffolding with the assistance of a structure engineer to meet the requirements of the contractor, the committee for social security and health, and the owner. The contractor then proceeds with the production of the scaffolding according to the plants Procedures are developed for the set-up of the equipment and the tools, and their removal when the work is finished. To install the scaffolding and continuously move it, for example, to drill holes at various locations, a crane must be installed permanently during the entire time of the work execution. At each move, the scaffolding must be anchored on its base, which takes time and requires considerable labour force. The staircase of the scaffolding must be lengthened on the entire length of the runner during displacement of the scaffolding, which represents highly important equipment costs. The drilling of holes is executed by hand, which constitutes a very exhausting and dangerous work for the workers.
SUMMARY
An object of the invention is to provide a platform unit that overcomes the drawbacks associated with the methods and equipment of the prior art.
Another object of the invention is to provide such a platform unit, which facilitates the job of the workers and improves the security level on sites.
A subsidiary object of the invention is to provide such a platform unit, which can go up or down on the slope of a dam runner or another structure according to the requirements of an operator located on the platform.
A subsidiary object of the invention is to provide such a platform unit, which can be level adjusted over a large range of tilt angles.
A subsidiary object of the invention is to provide such a platform unit, capable of moving closer to the work surface.
A subsidiary object of the invention is to provide such a platform unit, capable of receiving drilling and other tools and allowing their whole operation.
A subsidiary object of the invention is to provide such a platform unit providing the space required for receiving an operator with specialized workers, in an entirely autonomous manner.
A subsidiary object of the invention is to provide such a platform unit, which reduces work costs and delays.
According to the present invention, there is provided an autonomous tilting platform unit for infrastructure work over a 0-90° slanted surface, comprising:
a carriage assembly having front and rear portions provided respectively with means for gliding against the slanted surface;
a platform assembly pivotally connected to the carriage assembly at the front portion thereof;
an autonomous rotor unit mounted on the carriage assembly through a pendulum assembly;
a jack means extending between the carriage assembly and the platform assembly, powered by the motor unit for adjustably tilting the platform assembly with respect to the carriage assembly;
a winch means mounted on the carriage assembly, powered by the motor unit, for hoisting the platform unit along the slanted surface, the winch means having a flexible means for attaching the carriage assembly at an upward point on the slanted surface; and
a control means mounted on the platform assembly, for operating the motor unit and controlling the jack means and the winch means.
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Chin Paul T.
Gercom Construction Inc.
Merchant & Gould P.C.
Olszewski Robert P.
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