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US3826426A Expired / Lapsed US ⏱️ 0.0 years remaining

Motor-driven spraying machine to be carried on the worker{40 s back

Assignee: Individual
•
Filing: 1973-05-30
•
Granted: 1974-07-30
•
Expires: 1993-05-30
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Abstract

Abstract A knapsack motor-driven spraying machine for spraying liquids for agricultural purposes, for disinfestations of other treatments comprising a container for the liquid to be sprayed, provided with means for hanging the machine on the worker''s back and including a pump for delivery the liquid under a predetermined pressure by means of an at least partially flexible delivery pipe ending with a handle including a nozzle controlled by a valve, provided to stop or reducing the liquid delivery, characterized by the fact that the pump is actuated by an internal combustion engine forming with said pump a compact unit carried on the outside of the rear wall of the container and each having self-carrying casing, on the side of the motor the motor pump unit being supported by fastening means including packing means and dampers to absorb the vibrations, while at the side where the pump is arranged its self-carrying casing is connected and supported by the container by two hollow connection members, one of which constitutes a portion of the suction pipe of the pump and the other is a portion of a recirculation pipe of the liquid, said two hollow connection members projecting into the inside of the container, where they are connected with pipes mounted into the container and which open near its bottom.

Inventors

  • 👤 G Bonvicini

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-29 23:13
CPC Classifications
F; F04; F04B; F04B43/00; F04B43/02; A; A01; A01M; A01M7/00; A01M7/0082; A01M7/0085; B; B05; B05B; B05B9/00; B05B9/03; B05B9/04; B05B9/08; B05B9/085; B05B9/0855; F04B17/00; F04B17/05

Claims Analysis

Total Claims: 7
Claim 1
Independent Claim 162 words
A spraying machine to be carried by the user, comprising a container for the liquid to be sprayed, means permitting the container to be sudpended from the user''S shoulders, a motor, means mounting said motor to the side of said container located away from the user''s back including vibration damper means interposed between said container and said motor, a pump, means mounting said pump to said container adjacent said motor comprising first and second fluid conduits exposed to the interior of said container, a third fluid conduit connecting said first fluid conduit to said inlet of said pump, a fourth fluid conduit connecting the outlet of said pump to said second fluid conduit, a flexible delivery hose connected to said fourth fluid conduit and provided with means for regulating the flow of liquid therefrom, and means within said fourth fluid conduit permitting the liquid therein to bypass said delivery hose and be conducted to said second fluid conduit at a predetermined pressure.
Claim 2
Dependent Claim 162 words
A spraying machine to be carried by the user, comprising a container for the liquid to be sprayed, means permitting the container to be sudpended from the user''S shoulders, a motor, means mounting said motor to the side of said container located away from the user''s back including vibration damper means interposed between said container and said motor, a pump, means mounting said pump to said container adjacent said motor comprising first and second fluid conduits exposed to the interior of said container, a third fluid conduit connecting said first fluid conduit to said inlet of said pump, a fourth fluid conduit connecting the outlet of said pump to said second fluid conduit, a flexible delivery hose connected to said fourth fluid conduit and provided with means for regulating the flow of liquid therefrom, and means within said fourth fluid conduit permitting the liquid therein to bypass said delivery hose and be conducted to said second fluid conduit at a predetermined pressure.
Claim 3
Dependent Claim 54 words
A spraying machine as in claim 1, wherein said motor is a single cylinder internal combustion engine provided with a crank shaft and said pump is provided with a housing within which is located a flexible diaphragm and a shaft, said crank shaft of said motor and said shaft of said pump being coaxial.
Claim 4
Dependent Claim 28 words
A spraying machine as in claim 2, wherein said pump further includes an eccentric operatively connected to a readial piston which actuates said flexible diaphragm of said pump.
Claim 5
Dependent Claim 35 words
A spraying machine as in claim 3, including a check valve located within said third fluid conduit and interposed between said container and said chamber of said pump within which said flexible diaphragm is located.
Claim 6
Dependent Claim 34 words
A spraying machine as in claim 4, including a check valve located within said fourth fluid chamber and interposed between said chamber within which said flexible diaphragm is located and said flexible delivery hose.
Claim 7
Dependent Claim 21 words
A spraying machine as in claim 5, wherein said delivery hose is positioned to extend generally vertically upward from said pump.

References Cited (Backward Citations)

US2958155A Cited
GB837369A Cited
US3421697A Cited
US3428255A Cited
AT267250B Cited
US3586238A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1977-07-29 1978-01-28 1978-07-30 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1981-07-29 1982-01-28 1982-07-30 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1985-07-29 1986-01-28 1986-07-30 $7700.00 Window Closed / Lapsed

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