Vacuum pump and vacuum apparatus equipped with vacuum pump
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Apr 2, 2002
Grant Date -
N/A
app pub date -
Jul 6, 1999
filing date -
Jul 7, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A vacuum pump has an inner cylinder having a hollow portion in fluid communication with atmospheric air, an inner flange disposed on an upper side of the inner cylinder, and an inner sealing groove disposed on an upper end surface of the inner flange. An outer cylinder is disposed over the inner cylinder. The outer cylinder has an outer flange disposed on an upper side of the outer cylinder and an outer sealing groove disposed on an upper end surface of the outer flange. An intake port is disposed at the upper side of the inner and outer cylinders. An exhaust port is disposed at lower sides of the inner and outer cylinders. A pump mechanism pumps gaseous molecules from the intake port to the exhaust port to discharge the gaseous molecules from the exhaust port.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully