Device for moving large and heavy loads

Details Device for moving large and heavy loads Device for moving large and heavy loads

1994-06-23

1996-03-05

Watson, Robert C.

Implements or apparatus for applying pushing or pulling force

Step-by-step traveling bar

B66F 100

Patent

active

054960134

DESCRIPTION:

BRIEF SUMMARY
BACKGROUND OF THE INVENTION

The present invention relates to a device for carrying and moving loads that are heavy and large. More particularly, the invention relates to a combination of two rails and a sliding plate that is movable along these rails by the action of a hydraulic jack.
Objects that weight several hundred tons such as transformers, machines and the like may be extremely large and bulky to transport. Since these devices must be moved with precision to place them where they must be installed, proper control over the movement of such devices is time consuming and requires complex devices with high demands in energy because the friction for moving such objects is great.
U.S. Pat. No. 4,923,174 discloses a device for use to move large and heavy objects. This device includes a pair of parallel rails provided with anchoring structures all over their length. A load-supporting shoe and an actuator supporting shoe connected to each other by a power jack actuator are slidably mounted on each rail. Extension or retraction of the power jack actuator when the actuator-supporting shoes are hold by the anchoring structures in a stationary position causes the load-supporting shoes and the load carried by the same to be moved forwards or rearwards over a given distance along the rails. Of course, such a movement can be repeated after the actuator-supporting shoes are anchored again in another stationary position.
The device disclosed in this patent is quite efficient. However, it is bulky and it does not provide any means for reducing and/or adjusting the degree of friction which may be very high, between the rails and the, load-supporting shoes.
It is therefore one object of this invention to provide an improved device which can be used to move large and heavy loads while installing or relocating the same.
It is another object of this invention to provide a device for moving large and heavy loads, which device is made of modular elements that are easy to carry from one location to the next.
It is a further object of this invention to provide a device for moving large and heavy loads where the degree of friction between the rails and the carrying plate can be changed at will.
It is a further object of this invention to provide a device for moving large and heavy loads where the surface contact of the rail and the plates that slide against each other can be made of high friction or low friction material in the form of interchangeable pads.


SUMMARY OF THE INVENTION

The above-mentioned objects are attained with a device for carrying heavy loads, the device comprising in combination: rails of a given length; plate being movable along the rails; and positioned on top of the plate along the rails;
This device is characterized in that: projects a row of supporting elements extending centrally at regular intervals along the length of the rail sections, each of the supporting elements comprising an upper layer made of a friction material; overlying the rails, each of the edge portions comprising two parallel rows of guiding elements projecting down from the undersurface, the guiding elements being positioned at regular intervals and each comprising a bottom layer made of a friction material, the rows of guiding elements being positioned and sized to define therebetween a guiding channel in which may releasably engage the central row of supporting elements projecting up the corresponding rails; and cooperate for guiding the load-carrying plate along the rails; bottom layers of the guiding elements bear on the upper surface of the rail sections on both sides of the rows of supporting elements and the upper layers of the supporting elements bear on the undersurface of the plate in the guiding channels, thereby facilitating sliding of the plate and load on the rails.


IN THE DRAWINGS

FIG. 1 is a partial top plan view of the modular rail sections of a device according to the invention when assembled to form two parallel rails;
FIG. 2 is a bottom plan view of a portion of the load-carrying plate of a device according

REFERENCES:
patent: 3659823 (1972-05-01), Griffin
patent: 4768835 (1988-09-01), Kalantarov et al.

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