Patent US4575404A successfully refreshed from Google Patents.
US4575404A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pure water tank assembly for water distillation equipment
Assignee: YAMATIO SCIENTIFIC CO Ltd
•
Filing: 1983-09-23
•
Granted: 1986-03-11
•
Expires: 2003-09-23
Abstract
Abstract A pure water tank for distillation equipment comprises a casing on a water tank proper and a communicating pipe via which interiors of the casing and tank proper communicate each other. Water in the casing prevents air from entering into the pure water tank through a condenser when generation of steam is halted.
Inventors
- 👤 Hideo Goto
- 👤 Naoki Yoshida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:45
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/02; C02F1/04; C02F1/043; B; B01; B01D; B01D3/00; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86187; Y10T137/8622
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
276 words
A pure water tank assembly for water distillation equipment comprising: a pure water tank with an inlet opening at its upper portion and an outlet opening at its lower portion, a casing of smaller capacity than said pure water tank for receiving pure water and delivering pure water to said pure water tank, said casing being mounted at a level above the inlet opening of said pure water tank and including a casing inlet opening for connection to a pure water delivery conduit and a communicating port at a level higher than said casing inlet opening so that pure water moving through said casing inlet opening must move to a level higher than said casing inlet opening to move through said communicating port and pure water covers the casing inlet opening and air is prevented by the pure water in the casing from moving from the casing inlet opening to the communicating port, a pipe connecting the communicating port of said casing to the inlet opening of said pure water tank for moving pure water from said casing to said pure water tank, and a discharge opening positioned at a level below said casing inlet opening for discharging water from said casing away from said pure water tank, a discharge conduit connected to said discharge opening and valve means in said discharge conduit for controlling the flow of water from said casing, a water purity sensor mounted to said casing for determining the purity of the water in said casing and for opening and closing said valve means in response to the purity of the water in the casing to drain impure water from the casing.
Claim 2
Dependent Claim
276 words
A pure water tank assembly for water distillation equipment comprising: a pure water tank with an inlet opening at its upper portion and an outlet opening at its lower portion, a casing of smaller capacity than said pure water tank for receiving pure water and delivering pure water to said pure water tank, said casing being mounted at a level above the inlet opening of said pure water tank and including a casing inlet opening for connection to a pure water delivery conduit and a communicating port at a level higher than said casing inlet opening so that pure water moving through said casing inlet opening must move to a level higher than said casing inlet opening to move through said communicating port and pure water covers the casing inlet opening and air is prevented by the pure water in the casing from moving from the casing inlet opening to the communicating port, a pipe connecting the communicating port of said casing to the inlet opening of said pure water tank for moving pure water from said casing to said pure water tank, and a discharge opening positioned at a level below said casing inlet opening for discharging water from said casing away from said pure water tank, a discharge conduit connected to said discharge opening and valve means in said discharge conduit for controlling the flow of water from said casing, a water purity sensor mounted to said casing for determining the purity of the water in said casing and for opening and closing said valve means in response to the purity of the water in the casing to drain impure water from the casing.
Claim 3
Dependent Claim
203 words
A pure water tank assembly for water distillation equipment comprising: a pure water tank for accumulating distilled water therein, a water inlet at the upper portion of said tank and a water outlet at a lower portion of said tank, an inlet conduit connected to said water inlet, an auxilliary casing mounted at a higher level than said water tank, said casing being provided with a casing inlet port through which distilled water enters said casing, and a casing outlet port positioned at a level higher than said casing inlet port and connected to said tank inlet conduit and through which the distilled water flows into the tank from the casing, and a casing discharge port positioned at a level in said casing which is lower than said casing inlet port through which water in the casing is discarded, a discharge conduit in fluid communication with said casing discharge port for ducting water away from said casing, a sensor in said casing for detecting the purity of the water in the casing, and valve means in said discharge conduit responsive to said sensor for controlling the discharge water through said discharge port and said discharge conduit to drain impure water from said casing.
Claim 4
Dependent Claim
203 words
A pure water tank assembly for water distillation equipment comprising: a pure water tank for accumulating distilled water therein, a water inlet at the upper portion of said tank and a water outlet at a lower portion of said tank, an inlet conduit connected to said water inlet, an auxilliary casing mounted at a higher level than said water tank, said casing being provided with a casing inlet port through which distilled water enters said casing, and a casing outlet port positioned at a level higher than said casing inlet port and connected to said tank inlet conduit and through which the distilled water flows into the tank from the casing, and a casing discharge port positioned at a level in said casing which is lower than said casing inlet port through which water in the casing is discarded, a discharge conduit in fluid communication with said casing discharge port for ducting water away from said casing, a sensor in said casing for detecting the purity of the water in the casing, and valve means in said discharge conduit responsive to said sensor for controlling the discharge water through said discharge port and said discharge conduit to drain impure water from said casing.
References Cited (Backward Citations)
US3235469A
Cited
US3347754A
Cited
US3361649A
Cited
US3317405A
Cited
US3527676A
Cited
US3736320A
Cited
US3860234A
Cited
US4304638A
Cited
US4304494A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-03-10 | 1989-09-09 | 1990-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-03-10 | 1993-09-09 | 1994-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-03-10 | 1997-09-09 | 1998-03-11 | $7700.00 | Window Closed / Lapsed |