Vacuum unit for steam sterilizer

Details Vacuum unit for steam sterilizer Vacuum unit for steam sterilizer

2008-05-23

2011-11-22

Kramer, Devon C (Department: 3746)

Pumps

One fluid pumped by contact or entrainment with another

Diverse pumps

C422S026000, C422S292000

Reexamination Certificate

active

08062002

ABSTRACT:
In a vacuum unit for use in drawing a vacuum on a steam sterilizer, a pump circulates water through an ejector and a reservoir. Fresh water is injected at the pump inlet to maintain a low temperature in the ejector so that it can operate efficiently. Excess water is taken from a location adjacent the bottom of the reservoir through an internal dip tube, and passed through a U-shaped conduit that serves as a condensate trap. To maintain the water discharge temperature below a predetermined level, fresh water is injected into the U-shaped conduit through a valve controlled by a temperature sensor downstream from the water injection point.

REFERENCES:
patent: 1438008 (1922-12-01), Young
patent: 5000907 (1991-03-01), Chevereau et al.
patent: 5906800 (1999-05-01), Napierkowski et al.
patent: 5997813 (1999-12-01), Yaskoff et al.
Drawing No. D-82-16118, May 22, 2006.
Drawing No. D-82-17326, Jul. 10, 2006.

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