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US 4,272,368 AGranted
Fluid filter and indicator
AssigneeParker-Hannifin Corporation
InventorsBrian A. Foord, Donald C. Leutz
Life of this patent
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AssigneeParker-Hannifin Corporation
InventorsBrian A. Foord, Donald C. Leutz
Estimating the term…
A versatile filter structure adaptable for use in differently ported configurations includes accommodation for variations of bypass and shutoff valving and for filter element replacement from either end or centrally of the structure. A head casting is secured to a tubular housing and either may be the mounting device for the filter. A funnel shaped diverter having an oblique edge is removably mounted in the head casting and provides separation between inlet and outlet portions of the filter structure by means of an eliptical O-ring seal at the edge which engages the interior of the head casting. The diverter provides a smooth transition for fluid flow to the interior of the filter, supports one end of the filter element in the tubular housing, optionally houses a shutoff valve operative automatically upon filter element removal, and further houses a bypass valve for safeguarding against filter element blockage. The remote end of the housing which also supports the filter element consists in the different configurations of a welded-closed or removable end assembly, with or without a port and shutoff valving. An indicator mounted on the head casting is in fluid communication with opposite sides of the O-ring seal to monitor inlet and outlet pressure differentials. Dual diaphragms actuate and isolate a sensing piston in the indicator and a dual spring arrangement biases the piston for normal operation and to provide an indication of lack of filter element in the housing.
A filter assembly, comprising a housing, a filter element supportive in said housing, a diverter supported in said housing for directing the flow of fluid therein, said diverter being removable from one end of said housing, thereby also to allow removal of said filter element through said one end of said housing, said diverter having support means thereon for supporting said filter element, said diverter comprising a funnel-shape structure having an oblique peripheral edge in supportive engagement with said housing, said oblique edge having a seal thereon to provide fluid tight engagement with said housing, and a bypass valve supported in said diverter for opening and closing a path of fluid communication through said diverter and from one side to the other of said seal on said diverter.
A fluid filter, comprising a generally tubular housing having inlet and outlet ports for routing fluid through said housing, one of said inlet and outlet ports being transversely disposed to the longitudinal axis of said housing and adjacent one end of said housing, a tubular filter element in said housing in fluid communication with said inlet and outlet ports, a diverter in said housing disposed between said transverse port and said filter element for routing the flow of fluid therebetween, said diverter being generally in the form of a funnel having a conical portion and a central tubular portion, said tubular portion being adapted to support one end of said filter element, a support member at the other end of said housing for support of the other end of said filter element in concentric relation to said housing, said conical portion of said diverter terminating in an edge lying generally in a plane angled with respect to the central axis of said housing, said edge being generally in the form of an ellipse, and a fluid seal at said edge in engagement with the interior of said housing.
Dependencies are inferred from the claim text.