Pump device and an ink jet recording apparatus having the pump d

Details Pump device and an ink jet recording apparatus having the pump d Pump device and an ink jet recording apparatus having the pump d

1988-07-25

1989-10-24

Hartary, Joseph W.

Recorders

Markers and/or driving means therefor

With ink supply to marker

417444, G01D 1516, B41J 304, F04B 700

Patent

active

048765589

ABSTRACT:
In a pump device wherein a piston is reciprocally moved in a predetermined range within a cylinder to thereby produce pressure, a liquid inflow hole is provided outside the predetermined range of the cylinder and a hermetically sealing member biased so as to hermetically seal the liquid inflow hole until the piston is moved by a predetermined amount is provided.

REFERENCES:
patent: 600626 (1898-03-01), Stumpf
patent: 4394669 (1983-07-01), Ozawa
patent: 4410900 (1983-10-01), Terasawa
patent: 4569641 (1986-02-01), Falk
patent: 4577203 (1986-03-01), Kawamura

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