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Adjustable load support
| Details |
Inventors: Andrae, Wolfhart; Andrae, Hans P.; Beyer, E. H. Erwin; Bayer, Karl; Lohmann, Manfred;
Assignee: SHW Schwabische Huttenwerke GmbH (Aalen-Wasseralfingen, DE)
Primary Examiner:
Assistant Examiner:
Attorney, Agent or Firm:
An adjustable load support for lifting, lowering, and transferring heavy loads is provided, comprising a hollow container having a bottom, side walls, and a liftable top. A portion of the top protrudes into the interior of the container. An elastomeric mass substantially fills the remainder of the interior of the container. Sealing elements are also provided which seal the portion of the top of the container extending into the interior of the container with the side walls. A substantially flat diaphragm is located between the elastomeric mass and the bottom of the container. The diaphragm is substantially parallel to the plane of the bottom of the container but is not in contact with the side walls of the container. Means for introducing a pressurized medium between the diaphragm and the elastomeric mass through an opening in the diaphragm is also provided. When the pressurized medium is introduced into the container between the diaphragm and the elastomeric mass, the top of the container is lifted. Conversely, when the pressurized medium is let out of the container, the top of the container is lowered. |
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DETAILED DESCRIPTION In accordance with the present invention, an adjustable load support for lifting, lowering, and transferring heavy loads is provided, comprising a hollow container having a bottom, side walls, and a liftable top.
A portion of the top protrudes into the interior of the container.
An elastomeric mass substantially fills the remainder of the interior of the container.
Sealing elements are also provided which seal the portion of the top of the container extending into the interior of the container with the side walls.
A substantially flat diaphragm is located between the elastomeric mass and the bottom of the container.
The diaphragm is substantially parallel to the plane of the bottom of the container but is not in contact with the side walls of the container.
Means for introducing a pressurized medium between the diaphragm and the elastomeric mass through an opening in the diaphragm are also provided.
When the pressurized medium is introduced into the container between the diaphragm and the elastomeric mass, the top of the container is lifted.
Conversely, when the pressurized medium is released from the container, the top of the container is lowered.
By means of the present invention, the problems heretofore described are overcome.
There is no longer required a membrane bubble of a flexible or elastic material connected to the side walls, and therefore, all the problems associated therewith are avoided.
There is also no longer required a similar membrane that needs to be attached to the bottom of the container and that is likely to loosen quickly and create problems.
Rather, more efficient use is made of the elasticity of the elastomeric mass.
Desirably, the pressurized medium in the present invention is a fluid, for instance hydraulic oil or a viscous material.
The present invention may be adapted for use in load supports capable of very high elevations.
For such uses, it is desirable that there be several openings for introducing the pressurized medium into the compartment between the diaphragm and the elastomeric mass
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