US3877645A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for spraying liquid product
Assignee: FLEET CREDIT Corp A CORP OF RI
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Filing: 1974-05-28
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Granted: 1975-04-15
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Expires: 1994-05-28
Abstract
Abstract A liquid distributor apparatus for use on a vehicle including a liquid product supply tank and a pump for pumping liquid from the tank to a spray bar system for spraying liquid product in a preselected width of the spread along a path traversed by the vehicle. The rate of flow of liquid product through the nozzles on the spray bar system varies as a function of the square root of the pressure drop across the nozzle and a control system is provided to sense the pressure in the spray bar system and the vehicle speed and to control flow of product to the spray bar system to vary the pressure on the product in the spray bar system as a function of the square of the speed of the vehicle to thereby maintain a preset spread density independent of variations in the speed of the vehicle.
Inventors
- 👤 Frederick F Oligschlaeger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:22
CPC Classifications
B; B05; B05B; B05B9/00; B05B9/03; B05B9/04; B05B9/06; A; A01; A01M; A01M7/00; A01M7/0089; G; G05; G05D; G05D7/00; G05D7/06; G05D7/0617; G05D7/0623; B05B1/00; B05B1/28; B05B15/00; B05B15/60; B05B15/65; B05B15/658
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
267 words
In a liquid distributor apparatus for use in a vehicle to distribute liquid product along a path traversed by the vehicle at a time rate of flow generally proportional to vehicle speed to maintain a preset spread dEnsity, the distributor apparatus including a tank for carrying a quantity of liquid product, product pump means having an inlet connected to receive product from the tank and an outlet connected to a delivery conduit means for delivering liquid product under pressure thereto, spray bar means connected to receive liquid product from the delivery conduit means and having nozzle means operative over a range of pressures to spray liquid product generally uniformly across a preselected width of spread at a time rate of flow that varies generally as a function of the square root of the pressure drop across the nozzle means, pressure sensing means for sensing the pressure on the liquid product in said spray bar means, pressure signal means responsive to said pressure sensing means and operative over a range of pressures for producing a first electrical control signal correlative with the pressure on the liquid product in said spray bar means, vehicle speed sensing means for producing a second electrical control signal correlative with the speed of the vehicle, and control means responsive to said first and second electrical control signals for controlling the rate of flow of liquid product to said spray bar means to vary the pressure on the product in said spray bar means generally as a function of the square of the speed of the vehicle and thereby maintain a preset spread density.
Claim 2
Dependent Claim
267 words
In a liquid distributor apparatus for use in a vehicle to distribute liquid product along a path traversed by the vehicle at a time rate of flow generally proportional to vehicle speed to maintain a preset spread dEnsity, the distributor apparatus including a tank for carrying a quantity of liquid product, product pump means having an inlet connected to receive product from the tank and an outlet connected to a delivery conduit means for delivering liquid product under pressure thereto, spray bar means connected to receive liquid product from the delivery conduit means and having nozzle means operative over a range of pressures to spray liquid product generally uniformly across a preselected width of spread at a time rate of flow that varies generally as a function of the square root of the pressure drop across the nozzle means, pressure sensing means for sensing the pressure on the liquid product in said spray bar means, pressure signal means responsive to said pressure sensing means and operative over a range of pressures for producing a first electrical control signal correlative with the pressure on the liquid product in said spray bar means, vehicle speed sensing means for producing a second electrical control signal correlative with the speed of the vehicle, and control means responsive to said first and second electrical control signals for controlling the rate of flow of liquid product to said spray bar means to vary the pressure on the product in said spray bar means generally as a function of the square of the speed of the vehicle and thereby maintain a preset spread density.
Claim 3
Dependent Claim
48 words
In a fluid distributor apparatus according to claim 1 wherein said control means includes a flow control valve in the delivery conduit means for controlling flow of liquid product to the spray bar means, and electroresponsive means for moving said flow control valve between open and closed positions.
Claim 4
Dependent Claim
28 words
In a liquid distributor apparatus according to claim 2 wherein said control means includes means operative to prevent opening of the flow control valve at low vehicle speeds.
Claim 5
Dependent Claim
50 words
In a liquid distributor apparatus according to claim 2 wherein said control means includes means operative to prevent opening of the flow control valve at low vehicle speeds in which the spray bar pressures required for distributing fluid product at said preset spread density are below a preselected minimum pressure.
Claim 6
Dependent Claim
38 words
In a liquid distributor apparatus according to claim 1 wherein said pressure signal means includes means operative to vary said first electrical control signal as a generally linear function of the rate of flow through said nozzle means.
Claim 7
Dependent Claim
40 words
In a liquid distributor apparatus according to claim 1 wherein said pressure signal means includes means operative to vary said first electrical control signal as a function of the square root of the pressure sensed by said pressure sensing means.
Claim 8
Dependent Claim
261 words
In a liquid distributor apparatus for use on a vehicle to distribute liquid product along a path traversed by the vehicle at a time rate of flow generally proportional to vehicle speed to maintain a preset spread density, the distributor apparatus including a tank for carrying a quantity of liquid product, product pump means having an inlet connected to receive product from the tank and an outlet connected to a delivery conduit means, spray bar means connected to receive liquid product from the delivery conduit means and having nozzle means spaced therealong operative over a range of pressure to spray liquid product generally uniformly along a preselected width of spread at a time rate of flow that varies as a nonlinear function of the pressure drop across the nozzle means, means for sensing the pressure on the product in the spray bar means, pressure signal means responsive to said pressure sensing means and operative over a range of pressures for producing a first electrical control signal that varies as a generally linear function of the time rate of flow through the nozzle means, vehicle speed sensing means for producing a second electrical control signal that varies as a generally linear function of the speed of the vehicle over the ground, and control means responsive to said first and second electrical control Signals for controlling the rate of flow of liquid product to said spary bar means to vary the pressure on the product in the spray bar means and maintain a preset ratio between said first and second electrical control signals.
Claim 9
Dependent Claim
261 words
In a liquid distributor apparatus for use on a vehicle to distribute liquid product along a path traversed by the vehicle at a time rate of flow generally proportional to vehicle speed to maintain a preset spread density, the distributor apparatus including a tank for carrying a quantity of liquid product, product pump means having an inlet connected to receive product from the tank and an outlet connected to a delivery conduit means, spray bar means connected to receive liquid product from the delivery conduit means and having nozzle means spaced therealong operative over a range of pressure to spray liquid product generally uniformly along a preselected width of spread at a time rate of flow that varies as a nonlinear function of the pressure drop across the nozzle means, means for sensing the pressure on the product in the spray bar means, pressure signal means responsive to said pressure sensing means and operative over a range of pressures for producing a first electrical control signal that varies as a generally linear function of the time rate of flow through the nozzle means, vehicle speed sensing means for producing a second electrical control signal that varies as a generally linear function of the speed of the vehicle over the ground, and control means responsive to said first and second electrical control Signals for controlling the rate of flow of liquid product to said spary bar means to vary the pressure on the product in the spray bar means and maintain a preset ratio between said first and second electrical control signals.
Claim 10
Dependent Claim
27 words
In a liquid distributor apparatus according to claim 7 including means for varying the preset ratio to be maintained between said first and second electrical control signals.
Claim 11
Dependent Claim
67 words
In a liquid distributor apparatus according to claim 7 wherein the rate of flow of fluid product through the nozzle means varies as a function of the square root of the pressure drop across the nozzle means, said pressure signal means including means operative to vary said first electrical control signal as a function of the square root of the pressure sensed by said pressure sensing means.
Claim 12
Dependent Claim
39 words
A liquid distributor apparatus according to claim 7 wherein said spray bar means includes plural spray bar sections, and means for shutting off flow to at least one spray bar section while maintaining flow to another spray bar section.
Claim 13
Dependent Claim
185 words
A liquid spreader control system for a vehicle mounted liquid distributor apparatus of the type including a tank for carrying liquid product, a spray bar apparatus having fixed orifice nozzles spaced therealong for spreading liquid product, and pump means for delivering liquid product from the tank to the spray bar apparatus under pressure, said control system including pressure sensing means for sensing the pressure on the liquid product in the spray bar apparatus, pressure signal transducer means responsive to said pressure sensing means and operative over a range of pressures for producing a first electrical control signal correlative with the pressure sensed by said sensing means, vehicle speed sensing means for producing a second electrical control signal correlative with the speed of the vehicle, and control means responsive to said first and second electrical control signals for controlling the rate of flow of liquid product to said spray bar apparatus to vary the pressure on the product in the spray bar apparatus generally as a function of the square of the speed of the vehicle to maintain a preset spread density at varying vehicle speeds.
Claim 14
Dependent Claim
185 words
A liquid spreader control system for a vehicle mounted liquid distributor apparatus of the type including a tank for carrying liquid product, a spray bar apparatus having fixed orifice nozzles spaced therealong for spreading liquid product, and pump means for delivering liquid product from the tank to the spray bar apparatus under pressure, said control system including pressure sensing means for sensing the pressure on the liquid product in the spray bar apparatus, pressure signal transducer means responsive to said pressure sensing means and operative over a range of pressures for producing a first electrical control signal correlative with the pressure sensed by said sensing means, vehicle speed sensing means for producing a second electrical control signal correlative with the speed of the vehicle, and control means responsive to said first and second electrical control signals for controlling the rate of flow of liquid product to said spray bar apparatus to vary the pressure on the product in the spray bar apparatus generally as a function of the square of the speed of the vehicle to maintain a preset spread density at varying vehicle speeds.
Claim 15
Dependent Claim
60 words
A liquid spreader control system according to claim 11 wherein said control means includes a flow control valve for controlling flow of liquid product from the pump means to the spray bar apparatus, and electroresponsive means for moving said flow control valve between open and closed positions to control the pressure on the liquid product in the spray bar apparatus.
Claim 16
Dependent Claim
24 words
A liquid spreader control apparatus according to claim 12 including means operative to prevent opening of the flow control valve at low vehicle speeds.
Claim 17
Dependent Claim
46 words
A liquid spreader control apparatus according to claim 12 including means operative to prevent opening of the flow control valve at low vehicle speeds at which the spray bar pressure required for distributing liquid product at said preset spread density are below a preselected minimum pressure.
Claim 18
Dependent Claim
234 words
A liquid spreader control system for a vehicle mounted liquid distributor apparatus of the type including a tank for carrying a liquid product, a spray bar apparatus having fixed orifice nozzles spaced therealong for spreading liquid product, and pump means for delivering liquid product from the tank to the spray bar apparatus under pressure, said control system including pressure sensing means for sensing the pressure on the liquid product in the spray bar apparatus, the pressure on the liquid product in the spray bar means varying generally as a function of the square of the rate of flow of product through the nozzles, pressure signal transducer means responsive to said pressure sensing means and operative over a range of pressures for producing a first electrical control signal that varies as a function of the square root of the pressure and as a generally linear function of the time rate of flow through the fixed orifice nozzle, vehicle speed sensing means for producing a second electrical control signal that varies as a generally linear function of the speed of the vehicle over the ground, and control means responsive to said first and second electrical control signals for controlling the rate of flow of liquid product to said spray bar apparatus to vary the pressure on the product in the spray bar apparatus and maintain a preset rate between said first and second electrical control signals.
Claim 19
Dependent Claim
234 words
A liquid spreader control system for a vehicle mounted liquid distributor apparatus of the type including a tank for carrying a liquid product, a spray bar apparatus having fixed orifice nozzles spaced therealong for spreading liquid product, and pump means for delivering liquid product from the tank to the spray bar apparatus under pressure, said control system including pressure sensing means for sensing the pressure on the liquid product in the spray bar apparatus, the pressure on the liquid product in the spray bar means varying generally as a function of the square of the rate of flow of product through the nozzles, pressure signal transducer means responsive to said pressure sensing means and operative over a range of pressures for producing a first electrical control signal that varies as a function of the square root of the pressure and as a generally linear function of the time rate of flow through the fixed orifice nozzle, vehicle speed sensing means for producing a second electrical control signal that varies as a generally linear function of the speed of the vehicle over the ground, and control means responsive to said first and second electrical control signals for controlling the rate of flow of liquid product to said spray bar apparatus to vary the pressure on the product in the spray bar apparatus and maintain a preset rate between said first and second electrical control signals.
Claim 20
Dependent Claim
25 words
A control system according to claim 15 including means for varying the preset rate to be maintained between said first and second electrical control signal.
Claim 21
Dependent Claim
21 words
A control system according to claim 15 wherein said pressure transducer includes a nonlinear impedance device operated by said pressure sensor.
Claim 22
Dependent Claim
54 words
A control system according to claim 15 wherein said pressure transducer includes a first means for producing a voltage signal that varies as a generally linear function of the pressure sensed by the sensing means over a preselected pressure range, and means responsive to said voltage signal for producing said first electrical control signal.
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) | 1978-04-14 | 1978-10-14 | 1979-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-14 | 1982-10-14 | 1983-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-14 | 1986-10-14 | 1987-04-15 | $7700.00 | Window Closed / Lapsed |