Patent US3850805A successfully refreshed from Google Patents.
US3850805A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter systems
Assignee: Sutcliffe Speakman and Co Ltd
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Filing: 1972-06-21
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Granted: 1974-11-26
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Expires: 1992-06-21
Abstract
Abstract The invention relates to a filter and water reclamation system in which a filter bed comprising a filter element of activated carbon and a filter bed comprising a filter element of sand are connected in series so that solids, detergent and wax are removed from water cycled through the system.
Inventors
- 👤 A Armstrong
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:22
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/28; C02F1/283; B; B01; B01D; B01D35/00; B01D35/18; B01D36/00; B01D36/04; C02F1/001; C02F1/02; C02F2101/00; C02F2101/30; C02F2101/301; C02F2101/32; C02F2103/00; C02F2103/44
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
228 words
A filter and water reclamation system for use with a washing apparatus, comprising tank means for receiving contaminated water to be filtered, pump means, first filter bed means with inlet and outlet means, filter element means in said first filter bed means comprising sand on a bed of graded gravel adapted to remove grit and other foreign bodies from said contaminated water, second filter bed means with inlet and outlet means, filter element means in said second filter bed means comprising a bed of activated carbon for removing detergent and/or wax from said contaminated water, reservoir means wherein clean water is collected after passage through said first and second filter means prior to passage to said washing apparatus, conduit means connecting said tank means, pump means, first and second filter bed means, and reservoir means in series for permitting contaminated water from said tank means to be cycled through said filter bed means to said reservoir means, and auxiliary conduit means connected between said reservoir means and the outlet means of said second filter bed means for permitting backwashing of said second filter bed means by means of the clean water contained within said reservoir means, whereby the water passing from said outlet means of said second filter means to said reservoir means is substantially clean of grit and other foreign bodies and free of detergent and/or wax.
Claim 2
Dependent Claim
228 words
A filter and water reclamation system for use with a washing apparatus, comprising tank means for receiving contaminated water to be filtered, pump means, first filter bed means with inlet and outlet means, filter element means in said first filter bed means comprising sand on a bed of graded gravel adapted to remove grit and other foreign bodies from said contaminated water, second filter bed means with inlet and outlet means, filter element means in said second filter bed means comprising a bed of activated carbon for removing detergent and/or wax from said contaminated water, reservoir means wherein clean water is collected after passage through said first and second filter means prior to passage to said washing apparatus, conduit means connecting said tank means, pump means, first and second filter bed means, and reservoir means in series for permitting contaminated water from said tank means to be cycled through said filter bed means to said reservoir means, and auxiliary conduit means connected between said reservoir means and the outlet means of said second filter bed means for permitting backwashing of said second filter bed means by means of the clean water contained within said reservoir means, whereby the water passing from said outlet means of said second filter means to said reservoir means is substantially clean of grit and other foreign bodies and free of detergent and/or wax.
Claim 3
Dependent Claim
55 words
A filter and water reclamation system as defined in claim 1, wherein there are two electrical heater means, one of said two electrical heater means being disposed in the base of said first filter bed means and the other of said electrical heater means being disposed in the base of said second filter bed means.
Claim 4
Dependent Claim
47 words
A filter and water reclamation system as defined in claim 1, wherein the filter element means associated with each filter bed means is disposed vertically above the respective outlet mEans whereby the water flows vertically downwardly through the filter element means associated with each filter bed means.
Claim 5
Dependent Claim
112 words
A filter and water reclamation system as defined in claim 1, wherein said tank means includes a settling tank to which is supplied the contaminated water to be filtered, and said tank means further including an overflow tank disposed in communication with the upper end of said settling tank for receiving therein the water which overflows from the settling tank so as to permit the heavy solids to be removed from the water within the settling tank, and said conduit means connecting said pump means to said overflow tank for permitting the contaminated water to be withdrawn therefrom by said pump means for supply to said first and second filter bed means.
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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) | 1977-11-25 | 1978-05-27 | 1978-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-25 | 1982-05-27 | 1982-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-25 | 1986-05-27 | 1986-11-26 | $7700.00 | Window Closed / Lapsed |