High pressure fluid filter

Claim 2

A fluid filter device comprising: a housing open at one end and having an inner wall surface defining a chamber, a first port and a second port having their axis substantially coplanar and opening to said chamber, a tubular member disposed in said housing in spaced relation to the inner wall surface of said housing, a ridge formed on the inner wall surface of said housing extending from said inner wall surface into sealing engagement with said tubular member, said ridge extending completely around said inner housing in a plane which intersects the axes of said first and second port and separates said first port from said second port and divides the space between said inner surface and said tubular member into an upper chamber in communication with said first port and a lower chamber in communication with said second port, and filter means disposed within said tubular member having one side in communication with said upper chamber and the opposite side in communication with said lower chamber.

Claim 3

The filter device as defined in claim 1 and in which said ports are axially aligned.

Claim 4

The filter device as defined in claim 1 and including pressure responsive means carried by said housing and movable in response to changes in the pressure differential across said filter means and means indicating the movement of said pressure responsive means exteriorly of said housing to indicate the condition of said filter element.

Claim 5

The filter device as defined in claim 3 and in which said pressure responsive means is movable in opposite directions from an intermediate position depending upon which of said ports is used for an inlet and which is used for an outlet, said indicating means including indicia at two opposite positions indicating the clogged condition of the filter element.

Claim 6

A fluid filter device comprising an outer housing having a first port and a second port coaxially aligned with said first port, said outer housing having a substantially cylindrical chamber; a cap member removably secured to said outer housing and closing one end of said chamber; an inner housing defining a container extending into said chamber and circumferentially spaced from said outer housing; a plurality of apertures provided in said inner housing for communicating said upper chamber with the interior of said inner housing; said inner housing having an opening in communication with said lower chamber; a filter cartridge positioned within said container so that upon flow of fluid from said first port to said second port said fluid will flow into said upper chamber between said container and said inner wall through said apertures into the interior of said container and through said filter cartridge into said lower chamber and upon flow of fluid from said second port to said first port said fluid will flow into said lower chamber between said container and said inner wall through said opening into said container and through said filter chamber for exit through said apertures into said upper chamber; a rod carrier by said cap member for extension into said filter cartridge; a pressure responsive member axially movably carried on said rod for movement towards and away from said cap member; means to maintain said pressure responsive member in an inactive position on said rod relative to said cap member; and visual indicator means operably connected to said pressure responsive member to indicate fluid flow conditions within said filter cartridge within said filter cartridge upon movement of said pressure responsive member in response to a change in the pressure differential between said ports.

Claim 7

A fluid filter device comprising an outer housing having a first port and a second port coaxially aligned with said first port, said outer housing having a substantially cylindrical chamber; a cap member removably secured to said outer housing and closing one end of said chamber; an inner housing defining a container extending into said chamber and circumferentially spaced from said outer housing; a plurality of apertures provided in said inner housing for communicating said upper chamber with the interior of said inner housing; said inner housing having an opening in communication with said lower chamber; a filter cartridge positioned within said container so that upon flow of fluid from said first port to said second port said fluid will flow into said upper chamber between said container and said inner wall through said apertures into the interior of said container and through said filter cartridge into said lower chamber and upon flow of fluid from said second port to said first port said fluid will flow into said lower chamber between said container and said inner wall through said opening into said container and through said filter chamber for exit through said apertures into said upper chamber; a rod carrier by said cap member for extension into said filter cartridge; a pressure responsive member axially movably carried on said rod for movement towards and away from said cap member; means to maintain said pressure responsive member in an inactive position on said rod relative to said cap member; and visual indicator means operably connected to said pressure responsive member to indicate fluid flow conditions within said filter cartridge within said filter cartridge upon movement of said pressure responsive member in response to a change in the pressure differential between said ports.

Claim 8

In the fluid filter device as defined in claim 5, in which said circumferential ridge is provided with a sealing member in abutment with said container to prevent fluid leakage between said upper and said lower chambers.

Claim 9

The fluid filter device as defined in claim 5, and in which said means to maintain said pressure responsive member in an inactive position comprises a pair of springs acting in opposite directions on said pressure responsive member to maintain said member in an intermediate suspended position on said rod for movement of said member along said rod in either direction upon a creation of a pressure differential across the top or bottom of said member.

Claim 10

A fluid filter device comprising: a housing open at one end and defining a cylindrical chamber; a cap member adapted to be removably secured to said housing at said open end to close said chamber; a first port providing communication of said chamber to the outside of said housing; a second port providing communication between said chamber and the outside of said housing, said second port being opposite

Claim 11

A fluid filter device comprising: a housing open at one end and defining a cylindrical chamber; a cap member adapted to be removably secured to said housing at said open end to close said chamber; a first port providing communication of said chamber to the outside of said housing; a second port providing communication between said chamber and the outside of said housing, said second port being opposite

Claim 12

The fluid filter device as claimed in claim 8, in which said pressure responsive means comprises a member slidably supported on a rod, said rod being attached to said cap member for extension into said tubular member and opposite resilient means disposed around said rod to normally maintain said member in a balanced, intermediate, floating, position on said rod.

Claim 13

The fluid filter device as claimed in claim 8, in which said annular means comprises a ridge in circumferential abutment with said tubular member.

Claim 14

The fluid filter device as claimed in claim 10, in which said ridge extends in diagonal direction through said chamber between said first port and said second port.