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US 6,787,033 B2Granted
Apparatus for filtering impurities out of fluid
AssigneeBaldwin Filters, Inc.
InventorsJohn H. Beard, Michael J. Rodebush
Life of this patent
Estimating the term…
Abstract
Impurities contained in a fluid are removed by a filter having a housing containing a full flow filter, a bypass filter, and a conduit. The conduit includes a pressure reduction section. The full flow filter, bypass filter, and conduit are positioned such that the bypass filter is downstream of the full flow filter, and the pressure reduction section creates a pressure differential across the bypass filter that draws a predetermined portion of the fluid through the bypass filter. All of the fluid passes through the full flow filter. The predetermined portion of the fluid that passes through full flow filter is also filtered a second time by being drawn through the bypass filter.
Claims23
A filter, comprising:
- a housing;
- an inlet port;
- an outlet port;
- a first filter element contained inside of the housing, the first filter element comprising a tubular shaped first filtering media;
- a bypass filter element comprising a tubular shaped bypass filtering media, the bypass filtering media disposed radially inside of the first filtering media with the bypass filtering media extending through an area between opposed axial ends of the first filtering media;
- a venturi conduit extending at least partially through the bypass filter element, the venturi conduit having a first entrance port and a second entrance port, the second entrance port being proximate a narrowed neck section of the of the venturi conduit for creating a venturi effect for drawing fluid through the bypass filtering media;
- a first collection chamber between the bypass filter element and the first filter element;
- a second collection chamber between the venturi conduit and the bypass filter element;
- wherein the filter defines a first flow path for fluid running from the inlet port, through the first filter element, through the first collection chamber to the first entrance port, and through the venturi conduit to the outlet port;
- and
- wherein the filter defines as second flow path for fluid running from the inlet port, through the first filter element to the first collection chamber, through the bypass filter element to the second collection chamber through the second entrance port and to the outlet port.
8 more elements
A filter, comprising:
- a housing extending between a closed end and a mounting end, the mounting end including an inlet port and an outlet port;
- a first filter element contained inside of the housing, the first filter element comprising a tubular shaped first filtering media;
- a bypass filter element comprising a tubular shaped bypass filtering media, the bypass filtering media disposed radially inside of the first filtering media with the bypass filtering media extending through an area between opposed axial ends of the first filtering media;
- a venturi conduit extending at least partially through the bypass filter element, the venturi conduit having a first entrance port and a second entrance port, the second entrance port being proximate a narrowed neck section of the of the venturi conduit for creating a venturi effect for drawing fluid through the bypass filtering media;
- a first collection chamber between the bypass filter element and the first filter element;
- and
- a fluid passageway extending radially inward around an end of the of the bypass filter element to fluidically connect the first collection chamber with the first entrance port of the venturi conduit.
4 more elements
A filter for placement in a housing, comprising:
- a first filter element comprising a tubular shaped first filtering media;
- a bypass filter element comprising a tubular shaped bypass filtering media, the bypass filtering media disposed radially inside of the first filtering media with the bypass filtering media extending through an area between opposed axial ends of the first filtering media;
- a venturi conduit extending at least partially through the bypass filter element, the venturi conduit having a first entrance port and a second entrance port, the second entrance port being proximate a narrowed neck section of the of the venturi conduit for creating a venturi effect for drawing fluid through the bypass filtering media;
- a first collection chamber between the bypass filter element and the first filter element;
- and
- a fluid passageway extending around the bypass filter to fluidically connect the first collection chamber with the first entrance port of the venturi conduit.
3 more elements
Dependencies are inferred from the claim text.