US3794172A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Storage and dispensing apparatus for a reverse osmosis water purification system
Assignee: Desalination Systems Inc
•
Filing: 1972-08-29
•
Granted: 1974-02-26
•
Expires: 1992-08-29
Abstract
Abstract Storage and dispensing apparatus for a reverse osmosis water purification system includes a storage container or tank, in which purified water is stored, connected to a dispensing valve. The purified water in this storage tank is separated, as by a pressure transmitting diaphragm or a gradient barrier, from impure water used as feed for the purification unit and which is normally maintained also in the storage tank under pressure no greater than slightly above atmospheric for example, 10 psig more or less. Opening the purified water dispensing valve actuates a diaphragm valve which opens to supply impure water into the storage tank at an elevated pressure of, for example 40 to 100 psig more or less, thus pressurizing the purified water in the storage tank to a pressure substantially elevated above its normal storage pressure for delivery through the dispensing valve.
Inventors
- 👤 D Bray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:37
CPC Classifications
B; B01; B01D; B01D61/00; B01D61/02; B01D61/10; B01D2313/00; B01D2313/18; B01D2313/50; B01D2313/501
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
175 words
Apparatus for temporarily storing purified water produced by a reverse osmosis purification unit, and which pressurizes said purified water for delivery to point of use, in which the improvement comprises: a. a closed, pressure-resistant storage container into which said purified water is transferred from said purification unit and temporarily stored; b. means for maintaining said purified water in said storage container normally under pressure slightly higher than atmospheric; c. means for dispensing purified water from said storage container including a dispensing valve that is normally closed; d. means for introducing impure water under elevated pressure into said storage container, said impure water introducing means being actuated by means responsive to a reduction of pressure in the transfer pipe supplying purified water to said dispensing valve in said dispensing means caused by opening said dispensing valve in said dispensing means, thereby pressurizing the purified water stored in said storage container for delivery through said dispensensing valve; and, e. pressure transmitting means separating the purified water temporarily stored in said storage container from impure water introduced thereinto.
Claim 2
Dependent Claim
175 words
Apparatus for temporarily storing purified water produced by a reverse osmosis purification unit, and which pressurizes said purified water for delivery to point of use, in which the improvement comprises: a. a closed, pressure-resistant storage container into which said purified water is transferred from said purification unit and temporarily stored; b. means for maintaining said purified water in said storage container normally under pressure slightly higher than atmospheric; c. means for dispensing purified water from said storage container including a dispensing valve that is normally closed; d. means for introducing impure water under elevated pressure into said storage container, said impure water introducing means being actuated by means responsive to a reduction of pressure in the transfer pipe supplying purified water to said dispensing valve in said dispensing means caused by opening said dispensing valve in said dispensing means, thereby pressurizing the purified water stored in said storage container for delivery through said dispensensing valve; and, e. pressure transmitting means separating the purified water temporarily stored in said storage container from impure water introduced thereinto.
Claim 3
Dependent Claim
48 words
Apparatus according to claim 1 in which said means for introducing impure water into said storage container is controlled by a pressure responsive valve normally closed and which is opened by hydraulic means actuated by the opening of said dispensing valve included in said purified water dispensing means.
Claim 4
Dependent Claim
48 words
Apparatus according to claim 2 in which a transfer pipe line from said storage container connected to said dispensing means containing purified water normally under pressure slightly higher than atmospheric communicates with one side of the diaphragm of a diaphragm valvE to normally maintain said diaphragm valve closed.
Claim 5
Dependent Claim
63 words
Apparatus according to claim 3 in which said diaphragm valve is adjusted to be normally maintained closed by pressure on its diaphragm of purified water connected to said dispensing means and normally under pressure slightly higher than atmospheric, and is opened by lowering of the pressure of purified water on its diaphragm caused by opening the dispensing valve included in said dispensing means.
Claim 6
Dependent Claim
40 words
Apparatus according to claim 4 in which said diaphragm valve is adjusted to be normally maintained closed at a pressure on its diaphragm of greater than about 10 psig and to be opened at a pressure below about 10 psig.
Claim 7
Dependent Claim
36 words
Apparatus according to claim 1 in which the purified water temporarily stored in said container is maintained normally at a pressure slightly above atmospheric by means for releasing a restricted flow of liquid from said container.
Claim 8
Dependent Claim
63 words
Apparatus according to claim 2 in which the hydraulic means actuated by the opening of said dispensing valve comprises a water supply pipe connected to the transfer pipe supplying purified water to said dispensing valve at a point at which the pressure in said transfer pipe is lower than the control pressure in said pressure responsive valve when said dispensing valve is opened.
Claim 9
Dependent Claim
39 words
Apparatus according to claim 1 in which the means for introducing impure water into said storage container include a pipe line supplying said impure water directly from the pipe line supplying feed water to said reverse osmosis purification unit.
Claim 10
Dependent Claim
36 words
Apparatus according to claim 1 in which the means for introducing impure water into said storage container include a pipe line supplying said impure water directly from the blowdown outlet of said reverse osmosis purification unit.
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) | 1977-02-25 | 1977-08-27 | 1978-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-25 | 1981-08-27 | 1982-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-25 | 1985-08-27 | 1986-02-26 | $7700.00 | Window Closed / Lapsed |