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US 12,589,417 B2Granted
Pressure washer
AssigneeAndreas Stihl AG & Co. KG
InventorsSimon Trinkle, Michael Renz, Christopher Tost
Life of this patent
Estimating the term…
Abstract
A pressure washer has a connection for a source of liquid; a high pressure pump; a main line by way of which liquid via the high pressure pump is conveyable from the connection to a spray opening of the main line; and a supplemental pump for adding an additive to the liquid. The pressure washer is conceived in such a way that the additive by way of the supplemental pump is able to be fed to the main line upstream of the high pressure pump.
Claims17
A pressure washer comprising:
- a connection for a source of liquid;
- a high pressure pump;
- a main line by way of which liquid is conveyable via said high pressure pump from said connection to a spray opening of said main line;
- said main line having a suction chamber between said connection and said high pressure pump;
- said main line having a pressure chamber between said high pressure pump and said spray opening;
- and,
- a supplemental pump for adding an additive to the liquid, wherein the additive by way of said supplemental pump is feedable directly to said suction chamber of said main line upstream of said high pressure pump without first passing through a bypass line which fluidly connects said pressure chamber and said suction chamber.
4 more elements
A pressure washer comprising:
- a connection for a source of liquid;
- a high pressure pump;
- a main line by way of which liquid is conveyable via said high pressure pump from said connection to a spray opening of said main line;
- and,
- a supplemental pump for adding an additive to the liquid, wherein the additive by way of said supplemental pump is feedable to said main line upstream of said high pressure pump;
- a further operator-controlled element for controlling said supplemental pump;
- a main line valve disposed in said main line and configured to adjust a free cross-sectional area of said main line;
- an operator-controlled element;
- said main line valve being operable via said operator-controlled element;
- wherein said further operator-controlled element has an activated state in which an operation of said supplemental pump is possible;
- and,
- said supplemental pump being configured to be operated only if said further operator-controlled element is in said activated state and said operator-controlled element is simultaneously activated.
9 more elements
A pressure washer comprising:
- a connection for a source of liquid;
- a high pressure pump;
- a main line by way of which liquid is conveyable via said high pressure pump from said connection to a spray opening of said main line;
- and,
- a supplemental pump for adding an additive to the liquid, wherein the additive by way of said supplemental pump is feedable to said main line upstream of said high pressure pump;
- a further operator-controlled element for controlling said supplemental pump wherein said further operator-controlled element is configured to influence a quantity of the additive fed to said main line;
- and,
- wherein a plurality of stages in which the quantities of the additive fed to said main line differ are adjustable via said further operator-controlled element.
5 more elements
A pressure washer comprising:
- a connection for a source of liquid;
- a high pressure pump;
- a main line by way of which liquid is conveyable via said high pressure pump from said connection to a spray opening of said main line;
- a supplemental pump for adding an additive to the liquid, wherein the additive by way of said supplemental pump is feedable to said main line upstream of said high pressure pump;
- a further operator-controlled element for controlling said supplemental pump;
- a hand-guidable spray unit;
- said spray opening being disposed on said hand-guidable spray unit;
- and,
- said further operator-controlled element being disposed on said hand-guidable spray unit.
6 more elements
Dependencies are inferred from the claim text.