Patent US3575349A successfully refreshed from Google Patents.
US3575349A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spraying apparatus
Assignee: Individual
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Filing: 1969-03-14
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Granted: 1971-04-20
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Expires: 1989-03-14
Abstract
Abstract In a spraying apparatus in which a liquid is atomized in a pulsating stream of combustion gas discharged from a combustion chamber equipped with a carburetor for use of liquid fuel, a valve is interposed between the tank for the sprayed liquid and an atomizing nozzle in the exhaust pipe of the combustion chamber and is automatically closed when the pressure in the exhaust pipe is reduced below the value normally maintained by the stream of combustion gas, thus shutting off the flow of spray liquid to the hot exhaust pipe when the liquid could flow backwards into the combustion chamber or burn the operator.
Inventors
- 👤 Karl-Heinz Stahl
- 👤 Fritz M Fend
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:02
CPC Classifications
F; F23; F23C; F23C15/00; A; A01; A01G; A01G13/00; A01G13/06; A01G13/065; A01M; A01M15/00; B; B05; B05B; B05B7/00; B05B7/24; B05B7/2489; B05B7/2491; F23C2700/00; F23C2700/02; F23C2700/023
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
307 words
In a spraying apparatus having a combustion chamber, a carburetor connected to said chamber for supplying the same with a combustible mixture of a liquid fuel with air of combustion, ignitioN means for igniting said mixture, an exhaust pipe connected to the chamber for discharging a stream of combustion gas from the same, a source of liquid fuel for said carburetor, a tank adapted to hold a liquid to be dispersed in said combustion gas for spraying there, an atomizing nozzle in said exhaust pipe, a conduit connecting said tank to said nozzle, a shutoff valve in said conduit, and operating means for operating said valve; the improvement which comprises: a. sensing means for sensing the gas pressure in said exhaust pipe; b. closing means operatively connected to said sensing means and responsive to reduction of the sensed pressure to a predetermined minimum value for closing said valve, 1. said closing means including yieldably resilient means biasing said valve toward the closed position, and latching means engageable with said valve for holding the same in the open position against the force of said biasing means, 2. said latching means being operatively connected to said sensing means for releasing the engaged valve when said sensing means senses the minimum value of said pressure; c. manual operating means for moving said valve between the open and closed positions thereof, 1. said sensing means including a cylinder member communicating with said exhaust pipe, a piston member exposed in said cylinder member to the pressure of said combustion gas, the pressure tending to move the piston member in a predetermined direction, and a spring opposing the movement, 2. said latching means including a latch member connected to said piston member for movement therewith; and d. locking means for locking said piston member against movement by said pressure and by said spring.
Claim 2
Dependent Claim
307 words
In a spraying apparatus having a combustion chamber, a carburetor connected to said chamber for supplying the same with a combustible mixture of a liquid fuel with air of combustion, ignitioN means for igniting said mixture, an exhaust pipe connected to the chamber for discharging a stream of combustion gas from the same, a source of liquid fuel for said carburetor, a tank adapted to hold a liquid to be dispersed in said combustion gas for spraying there, an atomizing nozzle in said exhaust pipe, a conduit connecting said tank to said nozzle, a shutoff valve in said conduit, and operating means for operating said valve; the improvement which comprises: a. sensing means for sensing the gas pressure in said exhaust pipe; b. closing means operatively connected to said sensing means and responsive to reduction of the sensed pressure to a predetermined minimum value for closing said valve, 1. said closing means including yieldably resilient means biasing said valve toward the closed position, and latching means engageable with said valve for holding the same in the open position against the force of said biasing means, 2. said latching means being operatively connected to said sensing means for releasing the engaged valve when said sensing means senses the minimum value of said pressure; c. manual operating means for moving said valve between the open and closed positions thereof, 1. said sensing means including a cylinder member communicating with said exhaust pipe, a piston member exposed in said cylinder member to the pressure of said combustion gas, the pressure tending to move the piston member in a predetermined direction, and a spring opposing the movement, 2. said latching means including a latch member connected to said piston member for movement therewith; and d. locking means for locking said piston member against movement by said pressure and by said spring.
Claim 3
Dependent Claim
172 words
In an apparatus as set forth in claim 1, said carburetor including a conduit having a throat portion, a portion converging toward said throat portion and normally open to the atmosphere, and a portion diverging from said throat portion and communicating with said combustion chamber, said source of liquid fuel including a container and a fuel nozzle connected to said container and having an orifice in said carburetor near said throat portion, the improvement further comprising an air nozzle having an orifice in said carburetor near said throat and pump means connected to said air nozzle for discharging intermittent pulses of starting air under pressure into said throat, the fuel nozzle having a terminal portion formed with said orifice in said throat portion and tapering toward said orifice at a predetermined apex angle, and another portion contiguously adjacent said terminal portion and tapering toward the same at an apex angle substantially greater than said predetermined angle, said pulses being discharged by said air nozzle against said tapering portions of said fuel nozzle.
Claim 4
Dependent Claim
33 words
said latching means including a latch member connected to said piston member for movement therewith; and d. locking means for locking said piston member against movement by said pressure and by said spring.
Claim 5
Dependent Claim
33 words
said latching means including a latch member connected to said piston member for movement therewith; and d. locking means for locking said piston member against movement by said pressure and by said spring.
Claim 6
Dependent Claim
41 words
said latching means being operatively connected to said sensing means for releasing the engaged valve when said sensing means senses the minimum value of said pressure; c. manual operating means for moving said valve between the open and closed positions thereof,
Claim 7
Dependent Claim
41 words
said latching means being operatively connected to said sensing means for releasing the engaged valve when said sensing means senses the minimum value of said pressure; c. manual operating means for moving said valve between the open and closed positions thereof,
Claim 8
Dependent Claim
26 words
said operating means including motion-transmitting means interposed between said bulb member and said mechanism for moving the same when said bulb member is compressed and expanded.
Claim 9
Dependent Claim
26 words
said operating means including motion-transmitting means interposed between said bulb member and said mechanism for moving the same when said bulb member is compressed and expanded.
Claim 10
Dependent Claim
65 words
In an apparatus as set forth in claim 1, said source of liquid fuel including a container adapted to hold a body of liquid fuel, a conduit connecting said body with said carburetor, and pressure means for admitting a gas to the portion of said container above said body of liquid under a pressure sufficient to drive the liquid of said body into said carburetor.
Claim 11
Dependent Claim
120 words
In an apparatus as set forth in claim 3, said carburetor including a conduit having a throat portion, a portion converging toward said throat portion and normally open to the atmosphere, and a portion diverging from said throat portion and communicating with said combustion chamber, said source of liquid fuel further including a fuel nozzle connected to said container and having an orifice in said carburetor near said throat portion, the improvement further comprising pump means for discharging intermittent pulses of starting air under pressure into said throat portion, said pressure means including a conduit connecting said pump means to said container, and metering means in said conduit for controlling the ratio of fuel and air supplied to said carburetor.
Claim 12
Dependent Claim
36 words
In an apparatus as set forTh in claim 1, a casing supporting said combustion chamber, said carburetor, said ignition means, said exhaust pipe, said tank, and said valve-operating means; and a carrying handle on said casing.
Claim 13
Dependent Claim
60 words
In an apparatus as set forth in claim 1, a cooling jacket spacedly enveloping said combustion chamber and said exhaust pipe, inlet means for admitting ambient air to a portion of said jacket adjacent said chamber, said jacket extending beyond said exhaust pipe in a direction away from said chamber and defining with said exhaust pipe an annular discharge opening.
Claim 14
Dependent Claim
248 words
In a spraying apparatus having a combustion chamber, a carburetor connected to said chamber for supplying the same with a combustible mixture of a liquid fuel with air of combustion, said carburetor including a conduit having a throat portion, a portion converging toward said throat portion and normally open to the atmosphere, and a portion diverging from said throat portion and communicating with said combustion chamber, ignition means for igniting said mixture, an exhaust pipe connected to the chamber for discharging a stream of combustion gas from the same, a source of liquid fuel for said carburetor, said source of liquid fuel including a container and a fuel nozzle connected to said container and having an orifice in said carburetor near said throat portion, a tank adapted to hold a liquid to be dispersed in said combustion gas for spraying there, an atomizing nozzle in said exhaust pipe, a conduit connecting said tank to said nozzle, a shutoff valve in said conduit, and operating means for operating said valve; the improvement which comprises: a. sensing means for sensing the gas pressure in said exhaust pipe; b. closing means operatively connected to said sensing means and responsive to reduction of the sensed pressure to a predetermined minimum value for closing said valve; c. pump means for discharging intermittent pulses of starting air under pressure into said throat portion; and d. common operating means connected to said pumping means and to said ignition means for operating the same in synchronization,
Claim 15
Dependent Claim
248 words
In a spraying apparatus having a combustion chamber, a carburetor connected to said chamber for supplying the same with a combustible mixture of a liquid fuel with air of combustion, said carburetor including a conduit having a throat portion, a portion converging toward said throat portion and normally open to the atmosphere, and a portion diverging from said throat portion and communicating with said combustion chamber, ignition means for igniting said mixture, an exhaust pipe connected to the chamber for discharging a stream of combustion gas from the same, a source of liquid fuel for said carburetor, said source of liquid fuel including a container and a fuel nozzle connected to said container and having an orifice in said carburetor near said throat portion, a tank adapted to hold a liquid to be dispersed in said combustion gas for spraying there, an atomizing nozzle in said exhaust pipe, a conduit connecting said tank to said nozzle, a shutoff valve in said conduit, and operating means for operating said valve; the improvement which comprises: a. sensing means for sensing the gas pressure in said exhaust pipe; b. closing means operatively connected to said sensing means and responsive to reduction of the sensed pressure to a predetermined minimum value for closing said valve; c. pump means for discharging intermittent pulses of starting air under pressure into said throat portion; and d. common operating means connected to said pumping means and to said ignition means for operating the same in synchronization,
Claim 16
Dependent Claim
275 words
In a spraying apparatus having a combustion chamber, a carburetor connected to said chamber for supplying the same with a combustible mixture of a liquid fuel with air of combustion, said carburetor including a conduit having a throat portion, a portion converging toward said throat portion and normally open to the atmosphere, and a portion diverging from said throat portion and communicating with said combustion chamber, ignition means for igniting said mixture, an exhaust pipe connected to the chamber for discharging a stream of combustion gas from the same, a source of liquid fuel for said carburetor, said source of liquid fuel including a container and a fuel nozzle connected to said container and having an orifice in said carburetor near said throat portion, a tank adapted to hold a liquid to be dispersed in said combustion gas for spraying there, an atomizing nozzle in said exhaust pipe, a conduit connecting said tank to said nozzle, a shutoff valve in said conduit, and operating means for operating said valve; the improvement which comprises: a. sensing means for sensing the gas pressure in said exhaust pipe; b. closing means operatively connected to said sensing means and responsive to reduction of the sensed pressure to a predetermined minimum value for closing said valve; c. a bulb member of resilient material; d. nozzle means connected to said bulb member for discharging intermittent pulses of starting air under pressure into said throat portion when said bulb member is alternatingly compressed and permitted to expand; and e. operating means responsive to said alternating compressing and expanding of said bulb member for operating said ignition means in synchronization with said pulses,
Claim 17
Dependent Claim
275 words
In a spraying apparatus having a combustion chamber, a carburetor connected to said chamber for supplying the same with a combustible mixture of a liquid fuel with air of combustion, said carburetor including a conduit having a throat portion, a portion converging toward said throat portion and normally open to the atmosphere, and a portion diverging from said throat portion and communicating with said combustion chamber, ignition means for igniting said mixture, an exhaust pipe connected to the chamber for discharging a stream of combustion gas from the same, a source of liquid fuel for said carburetor, said source of liquid fuel including a container and a fuel nozzle connected to said container and having an orifice in said carburetor near said throat portion, a tank adapted to hold a liquid to be dispersed in said combustion gas for spraying there, an atomizing nozzle in said exhaust pipe, a conduit connecting said tank to said nozzle, a shutoff valve in said conduit, and operating means for operating said valve; the improvement which comprises: a. sensing means for sensing the gas pressure in said exhaust pipe; b. closing means operatively connected to said sensing means and responsive to reduction of the sensed pressure to a predetermined minimum value for closing said valve; c. a bulb member of resilient material; d. nozzle means connected to said bulb member for discharging intermittent pulses of starting air under pressure into said throat portion when said bulb member is alternatingly compressed and permitted to expand; and e. operating means responsive to said alternating compressing and expanding of said bulb member for operating said ignition means in synchronization with said pulses,
Claim 18
Dependent Claim
225 words
In a spraying apparatus having a combustion chamber, a carburetor connected to said chamber for supplying the same with a combustible mixture of a liquid fuel with air of combustion, ignition means for igniting said mixture, an exhaust pipe connected to the chamber and having a discharge orifice for discharging a stream of combustion gas from said chamber, a source of liquid fuel for said carburetor, a tank adapted to hold a liquid to be dispersed in said combustion gas for spraying there, an atomizing nozzle in said exhaust pipe, a conduit connecting said tank to said nozzle, a shutoff valve in said conduit, and operating means for operating said valve; the improvement which comprises: a. sensing means for sensing the gas pressure in said exhaust pipe; b. closing means operatively connected to said sensing means and responsive to reduction of the sensed pressure to a predetermined minimum value for closing said valve; c. a silencer chamber having a flow section substantially greater than the flow section of said exhaust pipe and sealed to the portion of said pipe remote from said combustion chamber; and d. a discharge pipe aligned with said exhaust pipe and leading outward of said silencer chamber, said discharge pipe having an orifice in said silencer chamber spacedly opposite said orifice of the exhaust pipe and flaring toward said exhaust pipe.
Claim 19
Dependent Claim
225 words
In a spraying apparatus having a combustion chamber, a carburetor connected to said chamber for supplying the same with a combustible mixture of a liquid fuel with air of combustion, ignition means for igniting said mixture, an exhaust pipe connected to the chamber and having a discharge orifice for discharging a stream of combustion gas from said chamber, a source of liquid fuel for said carburetor, a tank adapted to hold a liquid to be dispersed in said combustion gas for spraying there, an atomizing nozzle in said exhaust pipe, a conduit connecting said tank to said nozzle, a shutoff valve in said conduit, and operating means for operating said valve; the improvement which comprises: a. sensing means for sensing the gas pressure in said exhaust pipe; b. closing means operatively connected to said sensing means and responsive to reduction of the sensed pressure to a predetermined minimum value for closing said valve; c. a silencer chamber having a flow section substantially greater than the flow section of said exhaust pipe and sealed to the portion of said pipe remote from said combustion chamber; and d. a discharge pipe aligned with said exhaust pipe and leading outward of said silencer chamber, said discharge pipe having an orifice in said silencer chamber spacedly opposite said orifice of the exhaust pipe and flaring toward said exhaust pipe.
Claim 20
Dependent Claim
26 words
In an apparatus as set forth in claim 9, a drain line communicating with said silencer chamber and leading downward from the same to said tank.
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) | 1974-04-19 | 1974-10-19 | 1975-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-19 | 1978-10-19 | 1979-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-19 | 1982-10-19 | 1983-04-20 | $7700.00 | Window Closed / Lapsed |