Vacuum suction apparatus having negative pressure actuated...

Details Vacuum suction apparatus having negative pressure actuated... Vacuum suction apparatus having negative pressure actuated...

2007-12-19

2009-12-29

Chin, Paul T (Department: 3652)

Handling: hand and hoist-line implements

Utilizing fluid pressure

Venturi effect

C417S187000

Reexamination Certificate

active

07637548

ABSTRACT:
A switching valve is disposed between a pressure fluid supply source and an ejector in a vacuum suction apparatus. A supply port of the switching valve is connected to the pressure fluid supply source, and an outlet port of the switching valve is connected to the ejector. In addition, when suction pads attract a workpiece under suction and a negative pressure becomes constant, a valve body is displaced by a negative pressure supplied through a vacuum port to the switching valve, whereupon communication between the supply port and the outlet port is blocked.

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