Vacuum generating unit

Details Vacuum generating unit Vacuum generating unit

2008-07-07

2011-10-25

Fox, John (Department: 3753)

Pumps

One fluid pumped by contact or entrainment with another

Jet

Reexamination Certificate

active

08043071

ABSTRACT:
An ejector functioning as a vacuum generating mechanism is disposed in a main body constituting a vacuum generating unit, and an atmospheric air introducing valve is disposed between the ejector and a vacuum port. The atmospheric air introducing valve is brought into a valve closed state at times when a negative pressure is generated by the ejector under a condition in which a workpiece is held by the negative pressure generated by the ejector, whereby communication between the vacuum port and the atmosphere is blocked. On the other hand, at times when the vacuum is broken, in which the negative pressure state of the vacuum port is released, the atmospheric air introducing valve is brought into a valve open state, whereby the vacuum port communicates with the atmosphere.

REFERENCES:
patent: 4402651 (1983-09-01), Ise
patent: 4432701 (1984-02-01), Ise
patent: 4655692 (1987-04-01), Ise
patent: 4865521 (1989-09-01), Ise et al.
patent: 6416295 (2002-07-01), Nagai et al.
patent: 2006/0278282 (2006-12-01), Nagai et al.
patent: 1287227 (2001-03-01), None
patent: 1877138 (2006-12-01), None
patent: 55-49599 (1980-04-01), None
patent: 63-193798 (1988-12-01), None
patent: 5-1000 (1993-01-01), None
patent: 6-37599 (1994-05-01), None
patent: 8-68400 (1996-03-01), None
patent: 2001-124000 (2001-05-01), None
patent: 2002-224984 (2002-08-01), None
patent: 2003-42134 (2003-02-01), None
patent: 2003-120598 (2003-04-01), None
patent: 2007-56746 (2007-03-01), None
Notice of Decision for Grant issued on Jan. 20, 2011 in Korean Patent Application No. 10-2008-0075183 (with English Translation).

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