Self-priming centrifugal pump
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Aug 31, 2004
Grant Date -
Feb 27, 2003
app pub date -
Aug 12, 2002
filing date -
Aug 11, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A priming vacuum control system for use on a self-priming pump includes a priming vacuum control valve and a priming vacuum control valve-actuating system. The priming vacuum control valve is disposed between a vacuum pump and a priming chamber for the self-priming pump so as to decouple the vacuum communication between the vacuum pump and the priming chamber when the priming vacuum control valve is closed. In one illustrative embodiment, the priming vacuum control valve includes: a valve stem positioned within a valve body, and a valve spring or other means for biasing is operatively positioned between the valve body and the valve stem so as to apply a default closing force between the valve body and the valve stem. The 'guideless' priming vacuum control valve of the present invention eliminates the inherent problems of sticking, poor performance and high maintenance exhibited by the prior state of the art priming vacuum control valves containing guides.
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