Apparatus for dispensing a liquid on a remote object

Details Apparatus for dispensing a liquid on a remote object Apparatus for dispensing a liquid on a remote object

1992-07-21

1993-10-19

Bertsch, Richard A.

Pumps

Motor driven

Fluid motor

239119, 239120, 239499, 184 152, F04B 1700, F05B 128

Patent

active

052539849

ABSTRACT:
An apparatus for efficiently applying a subject liquid on an object of interest is disclosed. The apparatus includes a metering device (30), a discharge tube (280) and a nozzle (290). The metering device (30) includes a cylinder (115) and a piston (165) which is operatively disposed within the cylinder to define a metering chamber (177) ahead of the piston. The metering device (30) includes a liquid inlet (108) and a liquid outlet (109). Fluid flow to the liquid outlet (109) is controlled by a check valve (130). The piston (165) is driven forwardly through a working stroke to force the liquid in the metering chamber (177), out of the metering chamber, and past the check valve (130). The piston (165) breaks the plane of the open end of the cylinder on each working stroke to preclude entrapment of air in the metering chamber (177), and thus provide for a more accurate metering. The nozzle (290) includes a fluid passageway (301) which is disposed in fluid flowing relation relative to the metering device (30). The passageway (301) is intersected by an elongated cavity (304) which is disposed in substantially perpendicular relation thereto. Formed on the nozzle (290) is an overflow reservoir (340) which is disposed in fluid communication with the passageway (301) and which collects any non-ejected subject liquid.

REFERENCES:
patent: 2601893 (1952-07-01), Funke
patent: 3236455 (1966-02-01), Lewis et al.
patent: 4784578 (1988-11-01), Gruett
patent: 4784584 (1988-11-01), Gruett

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