US3810544A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter systems
Assignee: Sutcliffe Speakman and Co Ltd
•
Filing: 1972-06-21
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Granted: 1974-05-14
•
Expires: 1992-06-21
Abstract
Abstract The invention relates to a filter and water reclamation system comprising two filter beds in series, one containing sand and one containing activated carbon granules, half a charge of water in a cycle passing only through the sand filter, the other half passing through the sand filter and the activated carbon, the water in the system remaining at a substantially constant volume.
Inventors
- 👤 A Armstrong
- 👤 G Fletcher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:02
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/001; C02F1/004; C02F1/28; C02F1/283; C02F2101/00; C02F2101/30; C02F2101/301; C02F2103/00; C02F2103/44
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
357 words
A filter and water reclamation system, comprising in series tank means for receiving contaminated liquid containing entrained solids and detergent and wax to be filtered and reclaimed, sump means for collecting contaminated water from said tank means, first pump means disposed in said sump means, first filter bed means having inlet means and outlet means and including sand filter element means, second filter bed means having inlet and outlet means and including Activated carbon filter element means, said outlet means of said first filter bed means being in communication with said inlet means of said second filter bed means, reservoir means for filtered and reclaimed water, second pump means for delivering filtered and reclaimed water to a washing apparatus, first conduit means connecting said outlet means of said second filter bed means with said reservoir means, second conduit means connecting said outlet means of said first filter bed means to said inlet means of said second filter bed means, third conduit means connecting a discharge side of said first pump means with said inlet means of said first filter bed means, an outlet means of said reservoir means being connected by fourth conduit means with an inlet side of said second pump means, said outlet means of said first filter bed means also being connected by fifth conduit means with said inlet side of said second pump means, said second pump means being adapted to pump in a cycle of operation half a charge of water in said system, after passage of said charge through said first filter bed means, to said washing apparatus, the second half of said charge of water in said cycle passing from said first filter bed means through said second filter bed means to said reservoir means prior to passage through said second pump means to said washing apparatus, whereby contaminated water circulated from said tank means via said sump means to said first and second filter bed means is cleansed of entrained solids, detergent and wax so that clean water is passed from said outlet means of said second filter bed means to said reservoir means and to said washing apparatus.
Claim 2
Dependent Claim
78 words
A filter and water reclamation system as defined in claim 1, wherein there is air release valve means, one such air release valve means being on top of said first filter bed means and the other such air release valve means being disposed on top of said second filter bed means, whereby water passing into said filter bed means completely fills said filter bed means and forces air from said bed through said respective air release valve means.
Claim 3
Dependent Claim
39 words
A filter and water reclamation system according to claim 1, wherein there is electrical means one such means being disposed in the base said first filter bed means and one in the base of said second filter bed means.
Claim 4
Dependent Claim
43 words
A filter and water reclamation system according to claim 1, further including selectively shiftable valve means associated with said fourth and fifth conduit means for selectably controlling the flow of liquid therethrough for supply to the inlet side of said second pump means.
References Cited (Backward Citations)
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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) | 1977-05-13 | 1977-11-12 | 1978-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-13 | 1981-11-12 | 1982-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-13 | 1985-11-12 | 1986-05-14 | $7700.00 | Window Closed / Lapsed |