US3757949A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid filter device
Assignee: CATBORUNDUM CO
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Filing: 1971-06-24
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Granted: 1973-09-11
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Expires: 1991-06-24
Abstract
Abstract In a liquid filter device, a tank for receiving filtered liquid has a frame disposed therein and pivotably mounted at one end thereof. Rollers mounted at each end of the frame support a driven conveyor which carries filter media. A head is adapted to discharge fluid onto the filter media. Due to the pivotable mounting, the frame including the conveyor can be moved to an upright position for cleaning the filter device.
Inventors
- 👤 E Halvorsen
- 👤 H Byrd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:36
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/09; B01D29/60; B01D29/605; B01D29/88; B01D29/90
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
117 words
A liquid filtering device comprising a tank for receiving filtered liquid, means for dispensing a sheet of filter media mounted at one end of said tank, a frame disposed within said tank, means for pivotably mounting one end of said frame on said tank, a conveyor mounted on said frame for supporting said filter media, an upper support for the drive section of said conveyor, said support comprising a plurality of rods forming a pocket for containing unfiltered liquid, a lower support for the return section of said conveyor said support comprising a plurality of rods attached to said frame, said frame being movable to an upright position to expose said tank and said conveyor for cleaning.
Claim 2
Dependent Claim
117 words
A liquid filtering device comprising a tank for receiving filtered liquid, means for dispensing a sheet of filter media mounted at one end of said tank, a frame disposed within said tank, means for pivotably mounting one end of said frame on said tank, a conveyor mounted on said frame for supporting said filter media, an upper support for the drive section of said conveyor, said support comprising a plurality of rods forming a pocket for containing unfiltered liquid, a lower support for the return section of said conveyor said support comprising a plurality of rods attached to said frame, said frame being movable to an upright position to expose said tank and said conveyor for cleaning.
Claim 3
Dependent Claim
42 words
A device according to claim 1 wherein said frame comprises a pair of elongated members, a pair of cross members joining said elongated members at the ends thereof, a roller at each end of said frame for mounting and driving said conveyor.
Claim 4
Dependent Claim
16 words
A device according to claim 2 including head for discharging the unfiltered fluid into the pocket.
Claim 5
Dependent Claim
37 words
A device according to claim 3 including means for driving said conveyor and a float extending into the pocket operably associated with said driving means for moving said conveyor when the unfiltered liquid reaches a predetermined level.
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) | 1976-09-10 | 1977-03-12 | 1977-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-10 | 1981-03-12 | 1981-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-10 | 1985-03-12 | 1985-09-11 | $7700.00 | Window Closed / Lapsed |