Mechanically actuated vacuum lifting device
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United States of America Patent
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Jun 9, 2009
Grant Date -
N/A
app pub date -
Apr 12, 2006
filing date -
Apr 13, 2005
priority date (Note) -
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Abstract
A method and apparatus are provided for vacuum-assisted lifting of a work piece or other object, through use of a lifting apparatus having a cylinder housing adapted at an upper end thereof for supporting a load, a piston rod moveable within the cylinder housing and having a lower exposed end thereof adapted for attachment to a suction cup device, in combination with a non-load bearing piston valve attached to the housing and operatively connected to be moved between an open and a closed position thereof by movement of the piston rod with respect to the housing. The piston valve is attached at an upper end of the housing, and adapted for movement between the open and closed position when contacted by an upper end of the piston rod, on successive strokes of the piston rod. The control valve is removable without disassembly of the remainder of the lifting apparatus.
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