Patent US3670962A successfully refreshed from Google Patents.
US3670962A
Expired / Lapsed
US
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Flow control assembly and method
Assignee: Decatur Foundry and Machine Co Inc
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Filing: 1969-11-19
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Granted: 1972-06-20
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Expires: 1989-11-19
Abstract
Abstract The present control structure is a centrifugal governor operated relatively low pressure diaphragm valve for a wheeled liquid applicator including a tank for liquid under applied air pressure, the governor being driven from a ground wheel of the applicator by a friction wheel-flexible cable drive, or a belt and pulley drive, or the like. This structure controls the applicator nozzle pressure so that the output, in gallons per minute, is proportioned to the speed, thereby providing a constant gallons per acre output, regardless of the speed. An adjustable drive assembly including a friction wheel-cone provides means for varying the rate of fluid output.
Inventors
- 👤 Douglas Johnston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:52
CPC Classifications
B; B05; B05B; B05B9/00; B05B9/03; B05B9/04; B05B9/06; A; A01; A01M; A01M7/00; A01M7/0003; A01M7/0089; Y; Y02; Y02P; Y02P60/00; Y02P60/20; Y02P60/21; Y10; Y10T; Y10T137/00; Y10T137/0971; Y10T137/1044
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
174 words
In combination, a centrifugal governor operated diaphragm valve for controlling the spray nozzle pressure of a liquid applicator so that the output in gallons per minute is proportional to the applicator speed to provide a constant gallons per acre output and the like, regardless of the speed of the applicator within its predetermined operating range comprising a flow passage for liquids, a valve in said passage, a pressure balancing yieldable diaphragm operatively connected with said valve for movement therewith, said balancing diaphragm having an effective area subjected to inlet pressure substantially equal to the effective area of said valve subjected to inlet pressure, and an effective area subjected to outlet pressure substantially equal to the effective area of said valve subjected to inlet pressure, a centrifugal governor operatively connected with said valve for positioning the same in accordance with the speed of an applicator, and means for effecting operative rotation of said governor including rotatable means adapted to be driven at speeds proportional to speeds of an applicator on which said valve is mounted.
Claim 2
Dependent Claim
174 words
In combination, a centrifugal governor operated diaphragm valve for controlling the spray nozzle pressure of a liquid applicator so that the output in gallons per minute is proportional to the applicator speed to provide a constant gallons per acre output and the like, regardless of the speed of the applicator within its predetermined operating range comprising a flow passage for liquids, a valve in said passage, a pressure balancing yieldable diaphragm operatively connected with said valve for movement therewith, said balancing diaphragm having an effective area subjected to inlet pressure substantially equal to the effective area of said valve subjected to inlet pressure, and an effective area subjected to outlet pressure substantially equal to the effective area of said valve subjected to inlet pressure, a centrifugal governor operatively connected with said valve for positioning the same in accordance with the speed of an applicator, and means for effecting operative rotation of said governor including rotatable means adapted to be driven at speeds proportional to speeds of an applicator on which said valve is mounted.
Claim 3
Dependent Claim
179 words
The combination of claim 1, in which said means for effecting operative rotation of said governor further includes adjustable means to vary the preselected gallonage per acre, said adjustable means comprising a friction wheel-cone operatively connected to said governor for movement therewith, and a driven drive pulley operatively engaging said friction wheel-cone, at least one of said pulley and wheel-cone being adjustable in respect to the other to vary preselected gallonage per acre, said pulley being adjustable, and a calibrated rotatable disc member integrated with said pulley, rotation of said disc member in preselecting the required gallonage effecting the required movement of said pulley in respect to said wheel-cone, means for driving said pulley including rotatable means adapted for operative relation with wheels and the like of an applicator, said rotatable means comprising a friction speed sensor wheel adapted to engage the wheel tire of an applicator, said speed sensor being operatively connected to said pulley, and alarm means operatively mounted to warn a user that the governor is swinging on a radius greater than its preselected operating radius.
Claim 4
Dependent Claim
126 words
In combination a centrifugal governor operated diaphragm valve for controlling the spray nozzle pressure of a liquid applicator so that the output in gallons per minute is proportional to the applicator speed to provide a constant gallons per acre output and the like, regardless of the speed of the applicator within its predetermined operating range comprising a flow passage for liquids, a valve in said passage, a centrifugal governor operatively connected with said valve for positioning the same in accordance with the speed of the applicator, and means for effecting operative rotation of said governor including rotatable means adapted to be driven at speeds proportional to speeds of the applicator on which said valve is mounted and adjustable means to vary the preselected gallonage per acre.
Claim 5
Dependent Claim
126 words
In combination a centrifugal governor operated diaphragm valve for controlling the spray nozzle pressure of a liquid applicator so that the output in gallons per minute is proportional to the applicator speed to provide a constant gallons per acre output and the like, regardless of the speed of the applicator within its predetermined operating range comprising a flow passage for liquids, a valve in said passage, a centrifugal governor operatively connected with said valve for positioning the same in accordance with the speed of the applicator, and means for effecting operative rotation of said governor including rotatable means adapted to be driven at speeds proportional to speeds of the applicator on which said valve is mounted and adjustable means to vary the preselected gallonage per acre.
Claim 6
Dependent Claim
53 words
The combination of claim 3, in which said adjustable means comprises a friction wheel-cone operatively connected to said governor for movement therewith, and a driven drive pulley operatively engaging said friction wheel-cone, at least one of said pulley and wheel-cone being adjustable in respect to the other to vary preselected gallonage per acre.
Claim 7
Dependent Claim
43 words
The combination of claim 4, in which said pulley is adjustable, and a calibrated rotatable disc member integrated with said pulley, rotation of said disc member in preselecting the required gallonage effecting the required movement of said pulley in respect to said wheel-cone.
Claim 8
Dependent Claim
27 words
The combination of claim 5 and including means for driving said pulley including rotatable means adapted for operative relation with wheels and the like of an applicator.
Claim 9
Dependent Claim
34 words
The combination of claim 6, in which said rotatable means comprises a friction speed sensor wheel adapted to engage the wheel tire of an applicator, said speed sensor being operatively connected to said pulley.
Claim 10
Dependent Claim
139 words
In combination, a centrifugal governor operated diaphragm valve for controlling the spray nozzle pressure of a liquid applicator so that the output in gallons per minute is proportional to the applicator speed to provide a constant gallons per acre output and the like, regardless of the speed of the applicator within its predetermined operating range comprising a flow passage for liquids, a valve in said passage, a centrifugal governor operatively connected with said valve for positioning the same in accordance with the speed of the applicator, an alarm means operatively mounted to warn a user that the governor is swinging on a radius greater than its preselected operating radius, and means for effecting operative rotation of said governor including rotatable means adapted to be driven at speeds proportional to speeds of the applicator on which said valve is mounted.
Claim 11
Dependent Claim
139 words
In combination, a centrifugal governor operated diaphragm valve for controlling the spray nozzle pressure of a liquid applicator so that the output in gallons per minute is proportional to the applicator speed to provide a constant gallons per acre output and the like, regardless of the speed of the applicator within its predetermined operating range comprising a flow passage for liquids, a valve in said passage, a centrifugal governor operatively connected with said valve for positioning the same in accordance with the speed of the applicator, an alarm means operatively mounted to warn a user that the governor is swinging on a radius greater than its preselected operating radius, and means for effecting operative rotation of said governor including rotatable means adapted to be driven at speeds proportional to speeds of the applicator on which said valve is mounted.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-20 | 1975-12-20 | 1976-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-20 | 1979-12-20 | 1980-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-20 | 1983-12-20 | 1984-06-20 | $7700.00 | Window Closed / Lapsed |