US3637078A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Directional flow fluid filter
Assignee: Gould Inc
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Filing: 1970-06-22
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Granted: 1972-01-25
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Expires: 1990-06-22
Abstract
Abstract A fluid filter is disclosed incorporating a pleated filtering element disposed in a generally cylindrical housing. a helically shaped flow vane is disposed so as to spiral about the pleated element and to induce the flow of the fluid flowing through the filter to travel generally across the pleats rather than along the pleats, thus directing the flow over a larger percentage of the total area of the filtering medium.
Inventors
- 👤 Bartley Douglass Hollar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:13
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/22; B01D27/00; B01D27/08; B01D27/10; B01D27/103; B01D27/106
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
114 words
A fluid filter comprising in combination: a housing; a folded filter element disposed in said housing; a fluid inlet port in said housing adapted to receive fluid from a fluid supply; a fluid outlet port in said housing communicating with said inlet port through said filter element and adapted to direct fluid flow from said housing; and fluid flow-directing means disposed in said housing positioned immediately adjacent the folds of the filter element on the fluid inlet side of said filter element and positioned with an unobstructed path between said flow directing means and said filter element so as to induce fold-impinging flow of the fluid generally transverse to the folds of the filter.
Claim 2
Dependent Claim
114 words
A fluid filter comprising in combination: a housing; a folded filter element disposed in said housing; a fluid inlet port in said housing adapted to receive fluid from a fluid supply; a fluid outlet port in said housing communicating with said inlet port through said filter element and adapted to direct fluid flow from said housing; and fluid flow-directing means disposed in said housing positioned immediately adjacent the folds of the filter element on the fluid inlet side of said filter element and positioned with an unobstructed path between said flow directing means and said filter element so as to induce fold-impinging flow of the fluid generally transverse to the folds of the filter.
Claim 3
Dependent Claim
19 words
The apparatus of claim 1 in which said folded filter element is formed generally in a pleated cylindrical shape.
Claim 4
Dependent Claim
31 words
The apparatus of claim 2 in which said housing comprises a generally cylindrical container and the pleats of said filter element are generally parallel to the axis of the cylindrical housing.
Claim 5
Dependent Claim
24 words
The apparatus of claim 3 in which said fluid flow-directing means are disposed between said pleated filter element and the walls of said housing.
Claim 6
Dependent Claim
26 words
The apparatus of claim 2 in which said fluid flow-directing means comprise a generally helical member disposed about the circumference of said cylindrical-shaped pleated filter element.
Claim 7
Dependent Claim
34 words
The apparatus of claim 5 in which said inlet port communicates with the space between the housing and the filter element and said outlet port communicates with the inside of said cylindrical filter element.
Claim 8
Dependent Claim
15 words
The apparatus of claim 1 in which said fluid flow-directing means comprise a helical vane.
Claim 9
Dependent Claim
35 words
The apparatus of claim 7 in which said helical vane is disposed between said housing and said filter element and is positioned to induce fluid flow generally transverse to the folds of the filter element.
Claim 10
Dependent Claim
27 words
The apparatus of claim 7 in which the helical vane member comprises a strip of metal disposed in said space between the housing and the filter element.
Claim 11
Dependent Claim
21 words
The apparatus of claim 9 in which said strip of metal extends in width from said filter element to said housing.
Claim 12
Dependent Claim
23 words
The apparatus of claim 10 in which said helical strip of metal is secured at the top and bottom of said filter element.
Claim 13
Dependent Claim
18 words
The apparatus of claim 11 in which said cylindrical pleated filter element comprises a paper composition filter element.
Claim 14
Dependent Claim
92 words
A fluid filter comprising in combination: a housing; a pleated generally cylindrical filter element disposed in said housing, defining a first space between said filter element and said housing and a second space within said cylindrical filter element; a fluid inlet port in communication with the inside of said cylindrical filter element; and helically shaped vane means positioned immediately adjacent to the filter element with an unobstructed path between the vane means and the filter element so as to induce fold impinging fluid flow transverse to the pleats of the filter element.
Claim 15
Dependent Claim
92 words
A fluid filter comprising in combination: a housing; a pleated generally cylindrical filter element disposed in said housing, defining a first space between said filter element and said housing and a second space within said cylindrical filter element; a fluid inlet port in communication with the inside of said cylindrical filter element; and helically shaped vane means positioned immediately adjacent to the filter element with an unobstructed path between the vane means and the filter element so as to induce fold impinging fluid flow transverse to the pleats of the filter element.
Claim 16
Dependent Claim
59 words
In a fluid filter having a housing and a pleated filter element disposed in said housing, the improvement comprising: fluid flow-directing means disposed between the element and the housing in a position with an unobstructed path between the flow-directing means and the filter element so as to induce fold-impinging fluid flow transverse To the pleats of said filter element.
Claim 17
Dependent Claim
59 words
In a fluid filter having a housing and a pleated filter element disposed in said housing, the improvement comprising: fluid flow-directing means disposed between the element and the housing in a position with an unobstructed path between the flow-directing means and the filter element so as to induce fold-impinging fluid flow transverse To the pleats of said filter element.
Claim 18
Dependent Claim
15 words
The apparatus of claim 14 in which said fluid flow-directing means comprise a helical vane.
Claim 19
Independent Claim
43 words
A method for directing the flow of fluid in a filter having a substantially cylindrical pleated filter element comprising the step of mechanically deflecting the direction of fluid flow into a path generally transverse to and impinging against the pleats of the element.
Claim 20
Independent Claim
43 words
A method for directing the flow of fluid in a filter having a substantially cylindrical pleated filter element comprising the step of mechanically deflecting the direction of fluid flow into a path generally transverse to and impinging against the pleats of the element.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-24 | 1975-07-26 | 1976-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-24 | 1979-07-26 | 1980-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-24 | 1983-07-26 | 1984-01-25 | $7700.00 | Window Closed / Lapsed |