Handling: hand and hoist-line implements – Utilizing fluid pressure – Frames
Patent
1996-11-08
1998-09-29
Kramer, Dean
Handling: hand and hoist-line implements
Utilizing fluid pressure
Frames
294 2, 414752, B66C 102, B25J 1506
Patent
active
058137130
ABSTRACT:
An apparatus for lifting one or more objects by suction includes a vacuum chamber, a grid element forming the floor of the vacuum chamber, and apparatus for creating a vacuum in the vacuum chamber. In an exemplary embodiment, the grid element includes a two-dimensional array of cells, each of which opens directly onto each opposite major surface of the grid element. Each cell has at least one valve member for closing and opening of the cell. The valve(s) normally assume a first position wherein the cell is open to provide direct communications through the cell between the opposite major surfaces of the grid element but are movable by a sufficient flow of air through the cell into a second position wherein the cell is substantially closed against such communication. Each valve member can include a flap valve pivoted for rotation between the first position and the second position, and a structure for supporting the grid element within the vacuum chamber.
REFERENCES:
patent: 3406938 (1968-10-01), Muir, Jr.
patent: 3523707 (1970-08-01), Roth
patent: 4674785 (1987-06-01), Riesenberg
patent: 4787812 (1988-11-01), Gopfert
Autocast Inventions Limited
Kramer Dean
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