Pilot operated valve with variable piston orifice
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Dec 6, 2005
Grant Date -
May 6, 2004
app pub date -
Oct 1, 2003
filing date -
Nov 5, 2002
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A valve assembly having a valve body, a piston, a modulating plug, a valve cover adjoining the valve body, and a throttling member. The valve body has an inlet and outlet port, a partition with a valve seat separating the valve body into a first and second flow passage. The piston has a throughbore including an orifice, reciprocably mounted in the valve body and movable between a first and second position. The modulating plug, in abutting contact with the piston and reciprocably mounted in the valve body, gradually moves between an open position, permitting a main fluid flow, and a closed position engaging the valve seat, blocking the main fluid flow. The throttling member is adapted to insure a gradual alteration of the cross-section of the orifice upon piston movement. A method of gradually opening the valve assembly modulating plug is also set forth.
First Claim
Other Claims data not available
Family
International Classification(s)
- 2003 Application Filing Year
- F16K Class
- 1094 Applications Filed
- 495 Patents Issued To-Date
- 45.25 % Issued To-Date
