US3638837A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Proportioning and cleaning device
Assignee: B AND B CHEMICAL CO Inc
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Filing: 1969-06-20
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Granted: 1972-02-01
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Expires: 1989-06-20
Abstract
Abstract A device to preselect and maintain a ratio of two liquids and have the ratio remain substantially constant and to maintain sufficient pressure to supply cleaning equipment, positioned up to several hundred feet away, with the correctly proportioned mixture, the device being composed of three systems, one for feeding the two liquids, one for mixing the two liquids and the third for pumping the mixture to the cleaning equipment, the first two systems being adapted to be shut off completely while the third system is connected to a source of supply of a chemical such as a paint stripper for pumping same to a remote point for usage. The two liquids are preferably a chemical and a solvent therefore.
Inventors
- 👤 Donald E Fullerton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:12
CPC Classifications
G; G05; G05D; G05D11/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
257 words
A pumping device for dispensing a fluid mixture of a chemical and solvent in a preselected ratio comprising, a supply source for said chemical, a supply source for said solvent under a predetermined line pressure, a mixing chamber for said chemical and solvent, a first pneumatically operated reciprocating constant stroke pump for feeding said chemical from the supply source to the mixing chamber at a selected input rate through an adjustable metering means, a second pneumatically operated, reciprocating constant stroke pump for feeding said solvent into said mixing chamber at a required input rate, said second pump being constructed and arranged to pass said solvent therethrough under said line pressure when at rest and being operative when said line pressure is insufficient to maintain said required input rate, a third pneumatically operated pump for delivering said fluid mixture from said mixing chamber to a dispensing means having a shutoff valve, air pressure applied independently to said first, second and third pump at a predetermined air pressure whereby the fluid mixture in the dispensing means and mixing chamber is maintained at a pressurized equilibrium and which predetermined air pressure causes each of said pumps to operate independently when said pressurized equilibrium is disturbed by opening said dispensing means shutoff valve to dispense said fluid mixture and to replenish the mixing chamber with said chemical and solvent in said preselected ratio, and means to individually adjust the air pressure to each of said first and second pumps, whereby they operaTe simultaneously at selected relative speeds to maintain said ratio.
Claim 2
Dependent Claim
257 words
A pumping device for dispensing a fluid mixture of a chemical and solvent in a preselected ratio comprising, a supply source for said chemical, a supply source for said solvent under a predetermined line pressure, a mixing chamber for said chemical and solvent, a first pneumatically operated reciprocating constant stroke pump for feeding said chemical from the supply source to the mixing chamber at a selected input rate through an adjustable metering means, a second pneumatically operated, reciprocating constant stroke pump for feeding said solvent into said mixing chamber at a required input rate, said second pump being constructed and arranged to pass said solvent therethrough under said line pressure when at rest and being operative when said line pressure is insufficient to maintain said required input rate, a third pneumatically operated pump for delivering said fluid mixture from said mixing chamber to a dispensing means having a shutoff valve, air pressure applied independently to said first, second and third pump at a predetermined air pressure whereby the fluid mixture in the dispensing means and mixing chamber is maintained at a pressurized equilibrium and which predetermined air pressure causes each of said pumps to operate independently when said pressurized equilibrium is disturbed by opening said dispensing means shutoff valve to dispense said fluid mixture and to replenish the mixing chamber with said chemical and solvent in said preselected ratio, and means to individually adjust the air pressure to each of said first and second pumps, whereby they operaTe simultaneously at selected relative speeds to maintain said ratio.
Claim 3
Dependent Claim
37 words
The pumping device defined in claim 1, including valve means for selectively switching said third pneumatically operated pump from said mixing chamber to a supply source for a second chemical to be pumped through said dispensing means.
Claim 4
Dependent Claim
46 words
The pumping device defined in claim 1 in which said adjustable metering means comprises a plurality of different sized orifices, each including an on-off valve, whereby any one or a combination of two or more of said orifices may be opened to determine said preselected ratio.
References Cited (Backward Citations)
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Cited
US3123342A
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US1990524A
Cited
US3239100A
Cited
US3454030A
Cited
US3474965A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-31 | 1975-08-02 | 1976-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-31 | 1979-08-02 | 1980-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-31 | 1983-08-02 | 1984-02-01 | $7700.00 | Window Closed / Lapsed |