Patent US3633757A successfully refreshed from Google Patents.
US3633757A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid filter
Assignee: Individual
•
Filing: 1968-09-06
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Granted: 1972-01-11
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Expires: 1988-09-06
Abstract
Abstract A fluid filter including a support and a sheath of filtering material which is fixed to and covers the support. A plurality of longitudinally flexible plates are disposed radially about an axis and constitute the support and a plurality of cylindrical members having radial grooves in which the plates are engaged to hold them in position.
Inventors
- 👤 Jean-Pierre Madern
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:16
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/11; B01D29/13; B01D29/15; B01D29/50; B01D29/52; B01D29/54; B01D2201/00; B01D2201/40
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
128 words
A cylindrical fluid suction filter which comprises: an internal support having at least two end members, one of said members having a bore adapted for mounting a suction tube thereon, said members each having a plurality of radial grooves on their inwardly facing sides; a plurality of elongate longitudinally flexible plates extending between said end members and arranged radially about the axis of said filter with their ends engaged in said radial grooves; and a flexible filter sheath fixed to said end members and enclosing said plates, said sheath acting under pressure differentials between the interior and exterior of said filter to flex said plates whereby upon changes in said pressure differential, said plates will shake and cause said sheath to cleanse itself of foreign particles collected thereon.
Claim 2
Dependent Claim
128 words
A cylindrical fluid suction filter which comprises: an internal support having at least two end members, one of said members having a bore adapted for mounting a suction tube thereon, said members each having a plurality of radial grooves on their inwardly facing sides; a plurality of elongate longitudinally flexible plates extending between said end members and arranged radially about the axis of said filter with their ends engaged in said radial grooves; and a flexible filter sheath fixed to said end members and enclosing said plates, said sheath acting under pressure differentials between the interior and exterior of said filter to flex said plates whereby upon changes in said pressure differential, said plates will shake and cause said sheath to cleanse itself of foreign particles collected thereon.
Claim 3
Dependent Claim
17 words
A filter according to claim 1, wherein the plates and the cylindrical members are made of P.V.C.
Claim 4
Dependent Claim
14 words
A filter according to claim 1, wherein the filter sheath is made of polypropylene.
Claim 5
Dependent Claim
39 words
The filter according to claim 1 wherein there is further provided intermediate support members positioned between said end members, said intermediate members having a bore extending therethrough and being provided with radially extending slots to accommodate said elongate plates.
Claim 6
Dependent Claim
38 words
The filter according to claim 4 wherein said support members include a coaxial flange defining a circumferential groove and said filter further includes retaining rings adapted to cooperate with said circumferential groove to fix said filter sheath therein.
Claim 7
Dependent Claim
14 words
A filter according to claim 5, wherein the retaining rings are made of Teflon.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-10 | 1975-07-12 | 1976-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-10 | 1979-07-12 | 1980-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-10 | 1983-07-12 | 1984-01-11 | $7700.00 | Window Closed / Lapsed |