Molecular drag pump

Details Molecular drag pump Molecular drag pump

1999-03-12

2001-02-13

Freay, Charles G. (Department: 3746)

Pumps

With condition responsive pumped fluid control

Inlet throttle or stop valve

C417S423400

Reexamination Certificate

active

06186749

ABSTRACT:

The present invention relates to a molecular drag pump.
The term “molecular drag pump” is used to cover any secondary vacuum pump of mechanical type having a spinning rotor, regardless of whether it uses fins or a drum or a combination thereof.
BACKGROUND OF THE INVENTION
In industrial methods where an enclosure needs to be evacuated, the pump unit includes, in particular, a molecular drag pump connected to the enclosure to be evacuated via a valve.
OBJECT AND SUMMARY OF THE INVENTION
An object of the present invention is to reduce the size of such an assembly, and to reduce the number of sealing gaskets.
The invention thus provides a molecular drag pump comprising a rotor housed inside a case having a suction inlet and a delivery outlet, said pump being associated at its inlet with a valve comprising a valve mechanism inside a valve envelope, wherein the valve envelope is integral with said pump case.


REFERENCES:
patent: 0 332 107 A1 (1989-09-01), None
patent: 0 397 051 A1 (1990-11-01), None

Affiliated with

Also associated with

Rating

Molecular drag pump does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Molecular drag pump, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Molecular drag pump will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2613278