Hydraulic metering device

Details Hydraulic metering device Hydraulic metering device

2006-08-15

2009-10-13

Kramer, Devon C (Department: 3746)

Pumps

Motor driven

Fluid motor

C417S392000, C417S399000, C417S401000, C417S547000, C417S552000, C417S570000

Reexamination Certificate

active

07600984

ABSTRACT:
The metering device for a liquid medium comprises a cylinder and a piston operatively disposed therein to define a metering chamber ahead of the piston. The outlet end of the cylinder is open and closed by an evacuation valve. The piston is driven forwardly through a working stroke to force the liquid medium in the metering chamber out of the chamber and past the evacuation valve. A check valve located in the metering chamber moves from a closed to an open position on each working stroke to preclude entrapment of air in the metering chamber and thus provide for more accurate metering. The metering device may include means to regulate the length of the working stroke.

REFERENCES:
patent: 600841 (1898-03-01), Oderman
patent: 603242 (1898-04-01), Weatherhead
patent: 990616 (1911-04-01), Whitaker et al.
patent: 1108984 (1914-09-01), Frey
patent: 2175881 (1939-10-01), Davis
patent: 2351930 (1944-06-01), Davis
patent: 2392030 (1946-01-01), Davis
patent: 2457339 (1948-12-01), Bertea
patent: 2550535 (1951-04-01), Davis
patent: 2605021 (1952-07-01), Churchill et al.
patent: 2818029 (1957-12-01), Petzold
patent: 2931313 (1960-04-01), Hughes
patent: 3306231 (1967-02-01), Cadiou
patent: 3930756 (1976-01-01), Bruggeman
patent: 4062424 (1977-12-01), Lyden
patent: 4106525 (1978-08-01), Currie et al.
patent: 4293059 (1981-10-01), Lucas
patent: 4436494 (1984-03-01), Yamaizumi
patent: 4522373 (1985-06-01), Shelbourn et al.
patent: 4577728 (1986-03-01), Gruett
patent: 4690171 (1987-09-01), Johnston
patent: 4739612 (1988-04-01), Stockbridge
patent: 4784578 (1988-11-01), Gruett
patent: 4784584 (1988-11-01), Gruett
patent: 5435130 (1995-07-01), Kroiss et al.

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