Pumps – One fluid pumped by contact or entrainment with another – Liquid pumped by supplying or exhausting gaseous motive...
Reexamination Certificate
2006-05-23
2006-05-23
Freay, Charles G. (Department: 3746)
Pumps
One fluid pumped by contact or entrainment with another
Liquid pumped by supplying or exhausting gaseous motive...
C417S134000
Reexamination Certificate
active
07048513
ABSTRACT:
A gas pressure driven fluid pump having a pump tank with a liquid inlet and a liquid outlet. A float assembly is carried within the interior of the pump tank and is movable between a low level position and a high level position. A compression spring is connected between the float assembly and a pivot member. Due to the force applied by the compression spring, the pivot member rotates to a first position when the float reaches its high level position and rotates to a second position when the float reaches its low level position. A valve assembly is connected to said pivot member to switch between motive porting and exhaust porting in a snap over fashion due to rotation of said pivot member between said first position and said second position. A damper system may be connected to the valve assembly to slow movement of the valve assembly between motive porting and exhaust porting.
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International Search report on corresponding PCT application, Serial No. PCT/US03/39095, international filing date Dec. 10, 2003.
Dukes Jon W.
Pendergrass Rickie A.
Platts Drew L.
Soares Jairo L.
Freay Charles G.
Nelson Mullins Riley & Scarborough LLP
Spirax Sarco, Inc.
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