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US 4,498,989 AGranted
Fluid filter element and support
AssigneeNippondenso Co., Ltd.
InventorsSusumu Miyakawa, Toshiaki Fukuta, Hajime Akado, Yoshihiro Taki
Life of this patent
Estimating the term…
Abstract
A fluid cleaner system including a filter element of substantially cylindrical construction corrugated in a cross-section including the axis thereof to allow a fluid to flow axially from one end to the other end. The filter element is supported and sealed by support means and sealing means and mounted in a case and a cap. The support means and sealing means are simple in construction and yet allow the filter element to fully perform its function.
Claims10
A fluid cleaner system comprising:
- a casing and a cap coupled to each other for defining therein a filter chamber;
- and
- a filter unit disposed in said filter chamber having a filter element and a support device,
- said filter element having two-dimensional wave forms and being formed of a trapezoidal or a sectorial filter sheet by folding the same along a plurality of folding lines parallel to a base line of said trapezoidal or sectorial filter sheet,
- wherein said support device supports said filter element thereon and holds the same in said filter chamber, said support device comprises:
- an inner frame having an inner annular groove for receiving therein the innermost peripheral portion of said filter element;
- an outer frame having an outer annular groove for receiving the outermost peripheral portion of said filter element, said outer frame also having a circular flange extending radially outwardly from said outer annular groove and said circular flange being interposed between outer circular peripheral portions of said casing and cap;
- and
- a plurality of webs connecting said inner and outer frames with each other and supporting the lower fold edges of said filter element thereby to prevent distortion of said element on down draft of fluid therethrough.
6 more elements
A fluid cleaner system comprising:
- a casing and a cap coupled to each other for defining therein a filter chamber;
- and
- a filter unit disposed in said filter chamber and having a filter element and a support device,
- said filter element having two-dimensional wave forms and being formed of a trapezoidal or a sectorial filter sheet by folding the same along a plurality of folding lines parallel to a base line of said trapezoidal or sectorial filter sheet,
- wherein said support device supports said filter element thereon and holds the same in said filter chamber, said support device comprises:
- an inner frame having an inner annular groove for receiving therein the innermost peripheral portion of said filter element;
- an outer frame having an outer annular groove for receiving the outermost peripheral portion of said filter element, said outer frame also having a circular flange extending radially outwardly from said outer annular groove and said circular flange being interposed between outer circular peripheral portions of said casing and cap;
- and
- a plurality of webs connecting said inner and outer frames with each other, each of said plurality of webs having a vertical rib extending downwardly and abutting on said casing for axially securing said support device.
6 more elements
A fluid cleaner system comprising:
- a casing and a cap coupled to each other for defining therein a filter chamber;
- and
- a filter unit disposed in said filter chamber and having a filter element and a support device,
- said filter element having two-dimensional wave forms and being formed of a trapezoidal or a sectorial filter sheet by folding the same along a plurality of folding lines parallel to a base line of said trapezoidal or sectorial filter sheet,
- wherein said support device supports said filter element thereon and holds the same in said filter chamber, said support device comprises:
- an inner frame having an inner annular groove for receiving therein the innermost peripheral portion of said filter element, said inner frame being formed to have a cup-like shape with a lower end portion extending downwardly beyond said inner annular groove and abutting on said casing for axially securing said inner frame;
- an outer frame having an outer annular groove for receiving the outermost peripheral portion of said filter element, said outer frame also having a circular flange extending radially outwardly from said outer annular groove and said circular flange being interposed between outer circular peripheral portions of said casing and cap;
- and
- a plurality of webs connecting said inner and outer frames with each other.
6 more elements
A fluid cleaner system comprising:
- a casing and a cap coupled to each other for defining therein a filter chamber;
- and
- a filter unit disposed in said filter chamber and having a filter element and a support device,
- said filter element having two-dimensional wave forms and being formed of a trapezoidal or a sectorial filter sheet by folding the same along a plurality of folding lines parallel to a base line of said trapezoidal or sectorial filter sheet,
- wherein said support device supports said filter element thereon and holds the same in said filter chamber, said support device comprises:
- an inner frame having an inner annular groove for receiving therein the innermost peripheral portion of said filter element;
- an outer frame having an outer annular groove for receiving the outermost peripheral portion of said filter element, said outer frame also having a circular flange extending radially outwardly from said outer annular groove and said circular flange being interposed between outer circular peripheral portions of said casing and cap;
- and
- a plurality of webs connecting said inner and outer frames with each other;
- and
- seal means extending along the periphery of said casing and including a single gasket having a lip formed on inner periphery thereof,
- said circular outer flange of said outer frame extending outwardly from the bottom of said outer annular groove,
- said cap having a flanged positioned near the lower edge of said cap,
- said casing having an annular groove formed along the outer periphery thereof,
- said flange of said cap abutting on said outer flange of said outer frame, and the bottom wall of said outer annular groove of said outer frame abutting on the upper surface of said casing,
- said single gasket contacting with said flange of said cap and said circular flange on one side of said gasket, and with the bottom of said annular groove of said casing on the other side, and
- said lip of said gasket further contacting with said circular flange of said outer frame for ensuring seal function.
14 more elements
Dependencies are inferred from the claim text.