Pressure washer

Details Pressure washer Pressure washer

1991-03-08

1993-07-27

Kashnikow, Andres

Fluid sprinkling, spraying, and diffusing

With system fluid relief or return to supply

239571, 239310, 13754313, 417539, F04B 4900

Patent

active

052304710

ABSTRACT:
A pressure washer for delivering liquid under high pressure has an inlet conduit connected to a liquid supply, an outlet conduit connected to a spray nozzle with a valve which is selectively openable for spraying liquid and a plurality of piston operated pumping cylinders connected in parallel between the inlet conduit and the outlet conduit. A bypass conduit recirculates liquid from the outlet to the inlet conduit. A valve in the bypass conduit selectively permits leakage from the outlet conduit when the spray nozzle valve is open and opens communication between the outlet conduit and the bypass conduit when the spray nozzle valve is closed and pressure builds up in the outlet conduit.

REFERENCES:
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patent: 3246845 (1966-04-01), Techlen et al.
patent: 3429508 (1969-02-01), Russinik
patent: 3796228 (1974-03-01), Bedo et al.
patent: 4084609 (1978-04-01), Johnson
patent: 4277229 (1981-07-01), Pacht
patent: 4467703 (1984-08-01), Redwine et al.
patent: 4644972 (1987-02-01), Perrott
patent: 4758135 (1988-07-01), Woodward et al.
patent: 4860995 (1989-08-01), Rogers
patent: 5067654 (1991-11-01), Paige

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