Handling: hand and hoist-line implements – Utilizing fluid pressure – Venturi effect
Patent
1993-07-12
1994-05-10
Cherry, Johnny D.
Handling: hand and hoist-line implements
Utilizing fluid pressure
Venturi effect
294907, B66C 102
Patent
active
053102320
ABSTRACT:
The invention concerns a vacuum lifter to transport loads with an adhesion surface and comprises at least one suction head with at least one projecting annular seal on its suction side, where the vacuum chamber(s) enclosed by the annular seal(s) is (are) hooked up to a main vacuum source and where additionally a battery-fed emergency vacuum source is provided which can be started by an emergency switch. In order to avert as much as possible crashes when using such a vacuum lifter, a pressure pickup (67) is associated with the or at least one of the vacuum chambers (13) and is coupled in such a way with a malfunction alarm (69) that when a preset limit pressure is exceeded during vacuum operation, the malfunction alarm (69) shall be turned ON.
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Fohnle et al, Bartholomy-Vakuum-Heber, 1985, 1-4.
Bartholomy & Co.
Berenato, III Joseph W.
Cherry Johnny D.
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