US 5,127,547 AGranted

Metering and dispensing apparatus

OwnerHorst Gerichinventor

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Abstract

A metering and dispensing machine that operates in accordance with the position of a cross-bar. The cross-bar is powered by a pneumatic cylinder and reciprocates two piston pumps that draw liquid from storage vessels during a back stroke. The liquid is expelled during a forward stroke through a valve and an outlet opening. The amount of liquid dispensed is determined by the pump chamber volume and pump piston draw distance. Each pump is removably secured directly to a valve block. To vary the ratio of liquids expelled from the pumps, at least one of the pumps is replaced with a larger or smaller pump. Each valve head includes a plug valve which is rotated from a fill position to a dispense position by an independent valve drive mechanism. The mechanism is actuated by sensor switches which are activated by predetermined positions of the cross-bar.

Claims13

Dependent claims

A machine for pumping predetermined volumes of fluid to a dispensing device, comprising:

a platform with an upstanding support;
a pump drive means attached to said support having a reciprocating drive shaft for supplying force to a cross-bar, said drive shaft having a free end which is connected to said cross-bar;
a pump means comprising a piston head and piston rod reciprocating within a pumping chamber for drawing in and discharging out a predetermined volume of said fluid, said piston rod having a distal end attached to said cross-bar;
a valve block attached to said pumping chamber having a valve bore intersected with an inlet channel, a pump chamber channel and a discharge outlet;
a rotatable valve having a shaft portion extending into said bore, said shaft having a through channel providing communication with either said inlet channel and pump chamber channel or said pump chamber channel and said discharge outlet;
a valve drive means connected to said rotatable valve for orienting said through channel in response to the position of said cross-bar;
a pressure sensor means for sensing fluid pressure at the dispensing device and for generating a fluid pressure signal;
a timer means connected to said pressure sensor means for activating said pump drive means in response to said fluid pressure signal at the dispensing device;
and,
a sensor means for detecting the position of said cross-bar and signaling said timer means to reverse the direction of said cross-bar while also signaling said timer means to actuate said valve drive means for changing the orientation of said through channel.

7 more elements

An apparatus for pumping and metering fluids to a dispensing outlet, comprising:

a base;
pump drive means secured to said base for supplying force to a cross-bar, said pump drive means having a reciprocable shaft connected to said cross-bar;
a first pump means connected to said cross-bar for receiving and discharging a predetermined quantity of fluid, said first pump means including a first valve having a through channel which is movable to provide communication between a fill opening and pump chamber and between said pump chamber and a discharge outlet;
a second pump means connected to said cross-bar for receiving and discharging a predetermined quantity of fluid, said second pump means including a second valve having a through channel which is movable to provide communication between a fill opening and pump chamber and between said pump chamber and a discharge outlet;
sensor means comprising a back stroke sensor and a forward stroke sensor which detect predetermined positions of said bar;
a pressure sensor means for sensing fluid pressure at the dispensing outlet and for generating a fluid pressure signal;
timer means which receives signals from said pressure sensor means and actuates said pump drive means for causing movement of said cross-bar, said timer means also receiving signals from said sensor means for reversing the direction of said cross-bar;
and,
valve drive means actuated by said timer means in response to a signal from said sensor means for moving said first and second valves in synchronization with said cross-bar position.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application: 07/646,390Filed 19 Feb 1991
Granted: 7 Jul 1992
Term ends: Not estimatedThe source records don’t support an estimate.

Classification10 codes

F04B 7/0011
The distribution member forming both the inlet and discharge distributor for one single pumping chamber: and having an oscillating movement
B01F 35/882
By feeding the materials batchwise: using measuring chambers, e.g. volumetric pumps, for feeding the substances
F04B 9/105
Having only one pumping chamber: reciprocating movement of the pumping member being obtained by a double-acting liquid motor
F04B 9/113
With two mechanically connected pumping members: reciprocating movement of the pumping members being obtained by a double-acting liquid motor