Gas separation – Combined or convertible
Reexamination Certificate
2005-06-28
2005-06-28
Pham, Minh-Chau T. (Department: 1724)
Gas separation
Combined or convertible
C055S385300, C095S019000, C095S278000, C095S283000, C096S417000, C096S421000, C096S422000, C096S423000, C251S030020, C251S030030
Reexamination Certificate
active
06911062
ABSTRACT:
Method and apparatus for filtering contaminants from a pressurized fluid. First and second filter elements are arranged within a housing to receive a flow of pressurized fluid. Respective first and second portions of the flow are directed through the filter elements and impinge opposing sides of a piston member which is biased in a first position by a collapsible pressure responsive member, such as a buckling pin. So long as the differential pressure across the first filter element is below a selected threshold, the first portion of the flow passes through an outlet of the housing and the second portion of the flow is blocked. Once sufficient contaminants have been captured by the first filter element, however, the resulting increase in differential pressure causes a collapse of the pressure responsive member. This moves the piston to a second position and directs the second portion of the flow to the outlet.
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Fellers , Snider, et al.
Pham Minh-Chau T.
Taylor Innovations L.L.C.
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