Patent US4688699A successfully refreshed from Google Patents.
US4688699A
Expired / Lapsed
US
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Bactericidal mixture control system having flow and dispense duration controls for respective substances
Assignee: Autotrol Corp
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Filing: 1985-10-02
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Granted: 1987-08-25
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Expires: 2005-10-02
Abstract
Abstract A mixture control system for mixing a bactericidal chemical and water in a reservoir in batches. Flow of the water into the reservoir is initiated by a float actuated switch and the duration of the flow is controlled. While the flow is occurring, a dispenser dispenses chemical into the reservoir according to a preset dispensing cycle which is initiated when the water flow is initiated and also terminates therewith.
Inventors
- 👤 Paul R. Goudy, Jr.
- 👤 James A. Medhurst
- 👤 Donn R. Dresselhuys
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 20:22
CPC Classifications
G; G05; G05D; G05D11/00; G05D11/02; G05D11/13; G05D11/131; G05D11/132; Y; Y10; Y10T; Y10T137/00; Y10T137/7287; Y10T137/7358; Y10T137/7368
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
161 words
A bactericidal mixture control system in which water and a bactericide are mixed together in a reservoir, comprising: a valve adapted to admit the water into the reservoir; means for triggering the valve to open to admit the water into the reservoir; means for presetting the duration of an "open" time period during which the valve remains open independent of the triggering means; a dispenser adapted to admit the bactericide into the reservoir according to a dispense cycle including at least one "on" time period during which the dispenser dispenses and at least one "off" time period during which the dispenser does not dispense; means separate from said open time period presetting means for presetting the duration of the "on" time period; and means for presetting the duration of the "off" time period; wherein the means for triggering the valve to open is responsive to the level of liquid in the reservoir to initiate the running of the "open" time period.
Claim 2
Dependent Claim
161 words
A bactericidal mixture control system in which water and a bactericide are mixed together in a reservoir, comprising: a valve adapted to admit the water into the reservoir; means for triggering the valve to open to admit the water into the reservoir; means for presetting the duration of an "open" time period during which the valve remains open independent of the triggering means; a dispenser adapted to admit the bactericide into the reservoir according to a dispense cycle including at least one "on" time period during which the dispenser dispenses and at least one "off" time period during which the dispenser does not dispense; means separate from said open time period presetting means for presetting the duration of the "on" time period; and means for presetting the duration of the "off" time period; wherein the means for triggering the valve to open is responsive to the level of liquid in the reservoir to initiate the running of the "open" time period.
Claim 3
Dependent Claim
175 words
A mixture control system in which two substances are mixed together in a reservoir, comprising: a valve adapted to admit one of the substances into the reservoir; means for triggering the valve to open to admit said one of the substances into the reservoir; means for presetting the duration of an "open" time period during which the valve remains open; a dispenser adapted to admit the other of the substances into the reservoir according to a dispense cycle including at least one "on" time period during which the dispenser dispenses and at least one "off" time period during which the dispenser does not dispense; means separate from said open time period presetting means for presetting the duration of the "on" time period; means for presetting the duration of the "off" time period; means for permitting operation of the dispense cycle only during the "open" time periods; and wherein the means for triggering the valve to open comprises a float actuated switch which provides an impulse signal to initiate the running of the "open" time period.
Claim 4
Dependent Claim
175 words
A mixture control system in which two substances are mixed together in a reservoir, comprising: a valve adapted to admit one of the substances into the reservoir; means for triggering the valve to open to admit said one of the substances into the reservoir; means for presetting the duration of an "open" time period during which the valve remains open; a dispenser adapted to admit the other of the substances into the reservoir according to a dispense cycle including at least one "on" time period during which the dispenser dispenses and at least one "off" time period during which the dispenser does not dispense; means separate from said open time period presetting means for presetting the duration of the "on" time period; means for presetting the duration of the "off" time period; means for permitting operation of the dispense cycle only during the "open" time periods; and wherein the means for triggering the valve to open comprises a float actuated switch which provides an impulse signal to initiate the running of the "open" time period.
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) | 1990-08-24 | 1991-02-23 | 1991-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-08-24 | 1995-02-23 | 1995-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-08-24 | 1999-02-23 | 1999-08-25 | $7700.00 | Window Closed / Lapsed |