Paint pump for airless spray guns

Details Paint pump for airless spray guns Paint pump for airless spray guns

1975-10-29

1977-06-21

Freeh, William L.

Pumps

Condition responsive control of pump drive motor

By controlling drive motor motive fluid

417390, F04B 4900

Patent

active

040308570

ABSTRACT:
This invention relates to a fluid actuated paint pump for high pressure airless spray guns and includes a novel unloading system in combination with a self-reversing fluid motor connected to a double-acting pump which supplies paint from a reservoir to an airless spray gun at a pressure which may run as high as 3500 psi.

REFERENCES:
patent: 1566995 (1925-12-01), Stanberwick
patent: 2048736 (1936-07-01), Esser
patent: 2161922 (1939-06-01), Goode
patent: 2593255 (1952-04-01), Bowman
patent: 2605716 (1952-08-01), Huber
patent: 2787223 (1957-04-01), Sargent
patent: 3103891 (1963-09-01), Fulton et al.
patent: 3139830 (1964-07-01), Uhezawa
patent: 3164101 (1965-01-01), Nederynon
patent: 3207080 (1965-09-01), Schlosser
patent: 3366066 (1968-01-01), Levey

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