Fluid handling – Processes
Reexamination Certificate
2000-05-11
2001-10-30
Hepperle, Stephen M. (Department: 3753)
Fluid handling
Processes
C137S111000, C137S112000, C137S114000, C137S625400, C137S907000
Reexamination Certificate
active
06308724
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates to a switchover device for a low capacity gas feed system of the type for use in feeding chlorine gas to a water supply to chlorinate the water. More specifically the invention relates to a switchover device for controlling gas flow from different gas supplies.
2. Related Art
Low capacity chlorine gas feed systems provide for the supply of gas from chlorine gas containers through a gas pressure regulator device to an injector wherein the chlorine gas is delivered to a water supply conduit. One chlorine feed system is illustrated in the assignee's Technical Data Sheet 910.250 titled “SONIX 100™ Chlorinator.” Attention is also directed to Conkling, U.S. Pat. No. 3,779,268, illustrating a regulator valve for a chlorine gas system.
One limitation of some chlorine gas supply systems is the amount of chlorine which can be delivered to the water supply. Use of a single gas cylinder permits the discharge of chlorine gas only at a limited flow rate before frosting of the valve makes the gas regulator valve inoperative.
In many areas, chlorine gas suppliers require that chlorine tanks be emptied completely before they can be returned to the supplier for refilling. Existing gas regulation systems have not provided an effective mechanism for insuring efficient use of all of the chlorine in the tanks. In other areas, chlorine gas suppliers require that chlorine tanks returned for refilling contain a predetermined quantity of chlorine in the tanks. Some gas regulation systems do not provide an effective mechanism for controlling the amount of gas left in the gas supply cylinders.
Another limitation of some chlorine gas systems is that they have not provided an effective and efficient system for switching over from one chlorine supply container to another chlorine supply container once the supply in the first container is exhausted. Further, some gas feed systems do not insure complete use or controlled use of the gas in the first container; other systems require mechanically complex regulator valve assemblies, and are expensive and unreliable.
SUMMARY OF THE INVENTION
The present invention provides a switchover device for a gas supply system. The switchover device includes an outlet in fluid communication with a vacuum source and a chamber. The device further includes two inlets each in fluid communication with a gas source and the chamber. A shuttle in the switchover device may be positioned so that it is in contact with one of the first inlet, the second inlet or with neither inlet.
In another embodiment, the present invention also provides a method for providing a gas to a gas supply system. A first gas is provided to a vacuum injector from a first source and a portion of the gas from the first source is depleted. A second gas is provided to the vacuum injector from a second source and the first gas source is further depleted while the second source is providing gas to the vacuum injector.
In another embodiment the present invention also provides for a switchover device for supplying gas to a gas supply system. The switchover device includes a valve body having an outlet, a first inlet and a second inlet. The outlet is in fluid communication with a vacuum source, the first inlet is in fluid communication with a first gas source and the second inlet is in fluid communication with a second gas source. The first inlet, the second inlet, or neither inlet may be selectively isolated from the outlet.
REFERENCES:
patent: 2547823 (1951-04-01), Josephian
patent: 2578042 (1951-12-01), Chandler
patent: 2630821 (1953-03-01), Arey et al.
patent: 2641273 (1953-06-01), Siebens
patent: 2754659 (1956-07-01), Dick
patent: 2775980 (1957-01-01), Renaudie
patent: 3001541 (1961-09-01), St. Clair
patent: 3133440 (1964-05-01), Conkling
patent: 3141331 (1964-07-01), Wilson
patent: 3154945 (1964-11-01), Busillo
patent: 3181358 (1965-05-01), Busillo
patent: 3194264 (1965-07-01), Greco
patent: 3220430 (1965-11-01), Haskett
patent: 3342068 (1967-09-01), Metzger
patent: 3544212 (1970-12-01), Maroney
patent: 3604445 (1971-09-01), Jordan
patent: 3646958 (1972-03-01), Braas
patent: 3691835 (1972-09-01), Metzger
patent: 3693653 (1972-09-01), Cramer et al.
patent: 3779268 (1973-12-01), Conkling
patent: 3989186 (1976-11-01), McMichael
patent: 4050305 (1977-09-01), Evans et al.
patent: 4099412 (1978-07-01), Nehrbass
patent: 4197809 (1980-04-01), Johnson
patent: 4202180 (1980-05-01), Cox
patent: 4223557 (1980-09-01), Brinkman
patent: 4241749 (1980-12-01), Petursson
patent: 4245513 (1981-01-01), Clements et al.
patent: 4250144 (1981-02-01), Ratigan
patent: 4254789 (1981-03-01), Westberg
patent: 4254790 (1981-03-01), Eriksson et al.
patent: 4257279 (1981-03-01), Marx
patent: 4324267 (1982-04-01), Bach
patent: 4333833 (1982-06-01), Longley et al.
patent: 4341234 (1982-07-01), Meinass et al.
patent: 4489016 (1984-12-01), Kriebel
patent: 4655246 (1987-04-01), Phlipot et al.
patent: 4674526 (1987-06-01), Athanassiu
patent: 4752211 (1988-06-01), Sabin
patent: 4830743 (1989-05-01), Koster et al.
patent: 4867413 (1989-09-01), Tessler
patent: 4923092 (1990-05-01), Kirschner et al.
patent: 4986122 (1991-01-01), Gust
patent: 4993684 (1991-02-01), Prina
patent: 5046701 (1991-09-01), Barber
patent: 5083546 (1992-01-01), Detweiler et al.
patent: 5095950 (1992-03-01), Hallberg
patent: 5151250 (1992-09-01), Conrad
patent: 5158748 (1992-10-01), Obi et al.
patent: 5189991 (1993-03-01), Humburg
patent: 5193400 (1993-03-01), Lew
patent: 5320128 (1994-06-01), Tablert
patent: 6105598 (2000-08-01), Cabrera et al.
patent: 44650 (1908-04-01), None
patent: 868.515 (1940-12-01), None
patent: 2012702 (1970-10-01), None
patent: 2206280 (1974-06-01), None
patent: 55-118109 (A) (1980-09-01), None
patent: WO 87/05133 (1987-08-01), None
Cabrera Mario D.
Haruch David
Stockinger Gregory
Van Grouw Albert
Hepperle Stephen M.
United States Filter Corporation
Wolf Greenfield & Sacks P.C.
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