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US4990254A
Expired / Lapsed
US
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Portable water purifier
Assignee: Japan Oxygen Co Ltd
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Filing: 1990-01-24
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Granted: 1991-02-05
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Expires: 2010-01-24
Abstract
Abstract A portable water purifier comprises an outer elongated hollow body having openings formed at the upper and lower portions, a cup adapted to be inserted in the outer elongated hollow body from the lower opening thereof, a filtering elongated hollow body adapted to be inserted in the cup from the upper opening of the outer elongated hollow body, and a cap fitted detachably on the upper portion of the outer elongated hollow body to cover this upper opening. The cup and the filtering elongated hollow body are accommodated in the outer elongated hollow body when the portable water purifier is not used in a portable manner. When this portable water purifier is used, the cup is pulled out from the outer elongated hollow body and is set under the outer elongated hollow body, so that water is poured from the upepr opening of the outer elongated hollow body and is filtered through a filter in the filtering elongated hollow body. The filtered water is stored in the cup.
Inventors
- 👤 Shoji Toida
- 👤 Takeshi Kuwana
- 👤 Kazunori Iwasaki
- 👤 Tooru Goto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:13
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/30; C; C02; C02F; C02F1/00; C02F1/001; C02F1/002; C02F1/003; C02F1/28; B01D2201/00; B01D2201/30; B01D2201/301; B01D2201/302; C02F2307/00; C02F2307/04
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
203 words
A water purifier comprising: an outer elongated hollow body having openings at top and bottom portions, an outer body portion with an inner wall and an engaging protrusive portion provided on said inner wall of said outer body portion at a lower portion thereof; a cup adapted to be fitted into said outer elongated hollow body from said lower opening thereof and having a cup body portion with an outer wall and a stopper projection provided on said outer wall of, and at a lower portion of, said cup body portion thereof, said stopper projection sliding over said protrusive portion of said outer elongated hollow body to come in engagement with said protrusive portion when said cup is fitted in said outer elongated hollow body; a filtering elongated hollow body adapted to be fitted in said cup from said upper opening of said outer elongated hollow body, having a flange at a periphery of an upper portion thereof, said flange being engageable with an upper edge of said outer elongated hollow body, and having a filter disposed in a lower portion thereof; and a cap fitted detachable on an upper portion of said outer elongated hollow body to cover said upper opening thereof.
Claim 2
Dependent Claim
203 words
A water purifier comprising: an outer elongated hollow body having openings at top and bottom portions, an outer body portion with an inner wall and an engaging protrusive portion provided on said inner wall of said outer body portion at a lower portion thereof; a cup adapted to be fitted into said outer elongated hollow body from said lower opening thereof and having a cup body portion with an outer wall and a stopper projection provided on said outer wall of, and at a lower portion of, said cup body portion thereof, said stopper projection sliding over said protrusive portion of said outer elongated hollow body to come in engagement with said protrusive portion when said cup is fitted in said outer elongated hollow body; a filtering elongated hollow body adapted to be fitted in said cup from said upper opening of said outer elongated hollow body, having a flange at a periphery of an upper portion thereof, said flange being engageable with an upper edge of said outer elongated hollow body, and having a filter disposed in a lower portion thereof; and a cap fitted detachable on an upper portion of said outer elongated hollow body to cover said upper opening thereof.
Claim 3
Dependent Claim
110 words
A portable water purifier according to claim 1, wherein said outer elongated hollow body, said cup, said filtering elongated hollow body and said cap have a circular lateral cross section, said outer elongated hollow body has a vertical elongated groove formed in said inner wall of said outer body portion, extending from a lower end thereof to an upper portion thereof, and said cup has a holder protrusive portion formed at an upper outer wall thereof for, when used, supporting a lower edge of said outer elongated hollow body, said holder protrusive portion being located in said groove of said outer elongated hollow body when said cup is inserted therein.
Claim 4
Dependent Claim
30 words
A portable water purifier according to claim 1, wherein said outer elongated hollow body, said cup, said filtering elongated hollow body and said cap have an oval lateral cross section.
Claim 5
Dependent Claim
30 words
A portable water purifier according to claim 1, wherein said outer elongated hollow body, said cup, said filtering elongated hollow body and said cap have a square lateral cross section.
Claim 6
Dependent Claim
30 words
A portable water purifier according to claim 1, wherein said cap has a top plate formed of a flexible material and said top plate has an air hole formed therein.
Claim 7
Dependent Claim
110 words
A portable water purifier according to claim 5, wherein said outer elongated hollow body, said cup, said filtering elongated hollow body and said cap have a circular lateral cross section, said outer elongated hollow body has a vertical elongated groove formed in said inner wall of said outer body portion, extending from a lower end thereof to an upper portion thereof, and said cup has a holder protrusive portion formed at an upper outer wall thereof for, when used, supporting a lower edge of said outer elongated hollow body, said holder protrusive portion being located in said groove of said outer elongated hollow body when said cup is inserted therein.
Claim 8
Dependent Claim
30 words
A portable water purifier according to claim 5, wherein said outer elongated hollow body, said cup, said filtering elongated hollow body and said cap have an oval lateral cross section.
Claim 9
Dependent Claim
30 words
A portable water purifier according to claim 5, wherein said outer elongated hollow body, said cup, said filtering elongated hollow body and said cap have a square lateral cross section.
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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) | 1994-02-04 | 1994-08-06 | 1995-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-02-04 | 1998-08-06 | 1999-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-02-04 | 2002-08-06 | 2003-02-05 | $7700.00 | Window Closed / Lapsed |