US3670898A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter having a flexible wall for filtering liquids
Assignee: Individual
•
Filing: 1970-06-17
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Granted: 1972-06-20
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Expires: 1990-06-17
Abstract
Abstract An apparatus for filtering a fluid medium, for example, dirty swimming pool water, comprises a hollow filter sleeve having a flexible wall which wall is caused to deform by the pressure of fluid medium flowing through the wall. The end of the sleeve is attached to a member which on reduction of the pressure of the fluid flowing through the wall causes the wall to straighten and assume its original position thereby causing debris resting on the wall to be moved from the wall.
Inventors
- 👤 Eugene Fournier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:33
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/62; B01D29/70; B01D29/72; B01D29/11; B01D29/13; B01D29/15
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
205 words
Apparatus for filtering a fluid comprising a first end disc member having a fluid outlet aperture and means for connecting said first end disc member to a support and connecting said outlet aperture to suction means, a second end disc member which is imperforate and is coaxial with and axially movable relative to said first end disc member, a flexible filter sleeve extending between said first end disc member and said second end disc member and having one end secured to the periphery of said first end disc member and the opposite end secured to the periphery of said second end disc member, and gravity actuated ballast means biasing said second end disc member axially away from said first end disc member to tension said flexible filter sleeve to approximately cylindrical form when no suction is applied to said outlet, portions of said sleeve between said end disc members flexing inwardly when said apparatus is immersed in a fluid containing solids and suction is applied to said outlet to form at least one annular recess receiving solids deposited on said filter sleeve, said filter sleeve being restored to its approximately cylindrical form by said biasing means to discharge said solids upon cessation of said suction.
Claim 2
Dependent Claim
205 words
Apparatus for filtering a fluid comprising a first end disc member having a fluid outlet aperture and means for connecting said first end disc member to a support and connecting said outlet aperture to suction means, a second end disc member which is imperforate and is coaxial with and axially movable relative to said first end disc member, a flexible filter sleeve extending between said first end disc member and said second end disc member and having one end secured to the periphery of said first end disc member and the opposite end secured to the periphery of said second end disc member, and gravity actuated ballast means biasing said second end disc member axially away from said first end disc member to tension said flexible filter sleeve to approximately cylindrical form when no suction is applied to said outlet, portions of said sleeve between said end disc members flexing inwardly when said apparatus is immersed in a fluid containing solids and suction is applied to said outlet to form at least one annular recess receiving solids deposited on said filter sleeve, said filter sleeve being restored to its approximately cylindrical form by said biasing means to discharge said solids upon cessation of said suction.
Claim 3
Dependent Claim
58 words
Apparatus according to claim 1, further comprising at least one perforate intermediate disc disposed coaxially between said end disc members and peripherally engaging and supporting said filter sleeve intErmediate said end disc members, and supporting means connecting said intermediate disc with said first end disc member to support it in fixed relation to said first end disc member.
Claim 4
Dependent Claim
20 words
Apparatus according to claim 2, in which said supporting means comprises a coaxial perforate tube communicating with said outlet aperture.
Claim 5
Dependent Claim
26 words
Apparatus according to claim 3, in which a plurality of said intermediate discs are spaced from one another and supported by sections of said perforate tube.
Claim 6
Dependent Claim
272 words
Apparatus for filtering a fluid comprising a first end disc member having a central fluid outlet aperture and means for connecting said first end disc member to a support and connecting said outlet aperture to suction means, a second end disc member which is imperforate and is coaxial with and axially movable relative to said first end disc member, a flexible filter sleeve extending between said first end disc member and said second end disc member and having one end secured to the periphery of said first end disc member and the opposite end secured to the periphery of said second end disc member, central perforate tube means fixed to said first end disc member and extending toward said second end disc member and communicating with said outlet aperture, a plurality of coaxial intermediate discs fixed on said tube means between said end disc members in axially spaced relation relative to said end disc members and to one another, said discs peripherally engaging and supporting said flexible filter sleeve, and gravity actuated ballast means biasing said second end disc member axially away from said first end disc member to tension said flexible filter sleeve to approximately cylindrical form when no suction is applied to said outlet, portions of said sleeve between said end disc members and said intermediate discs flexing inwardly when said apparatus is immersed in a fluid containing solids and suction is applied to said outlet to form annular recesses receiving solids deposited on said filter sleeve, said filter sleeve being restored to its approximately cylindrical form by said biasing means to disengage said solids upon cessation of said suction.
Claim 7
Dependent Claim
272 words
Apparatus for filtering a fluid comprising a first end disc member having a central fluid outlet aperture and means for connecting said first end disc member to a support and connecting said outlet aperture to suction means, a second end disc member which is imperforate and is coaxial with and axially movable relative to said first end disc member, a flexible filter sleeve extending between said first end disc member and said second end disc member and having one end secured to the periphery of said first end disc member and the opposite end secured to the periphery of said second end disc member, central perforate tube means fixed to said first end disc member and extending toward said second end disc member and communicating with said outlet aperture, a plurality of coaxial intermediate discs fixed on said tube means between said end disc members in axially spaced relation relative to said end disc members and to one another, said discs peripherally engaging and supporting said flexible filter sleeve, and gravity actuated ballast means biasing said second end disc member axially away from said first end disc member to tension said flexible filter sleeve to approximately cylindrical form when no suction is applied to said outlet, portions of said sleeve between said end disc members and said intermediate discs flexing inwardly when said apparatus is immersed in a fluid containing solids and suction is applied to said outlet to form annular recesses receiving solids deposited on said filter sleeve, said filter sleeve being restored to its approximately cylindrical form by said biasing means to disengage said solids upon cessation of said suction.
Claim 8
Dependent Claim
12 words
Apparatus according to claim 5, in which said intermediate discs are perforate.
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) | 1975-06-20 | 1975-12-20 | 1976-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-20 | 1979-12-20 | 1980-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-20 | 1983-12-20 | 1984-06-20 | $7700.00 | Window Closed / Lapsed |