System and method for dispensing a predetermined amount of a fluid
A system and method for dispensing a predetermined portion of a beverage or drink additive using a cost effective portion control valve that replaces electrical components with mechanical components. The present invention dispenses a controlled portion of a beverage when a lever is activated. A magnetically coupled linkage system can control the exact amount of fluid dispensed. A valve block contains a beverage input, a beverage outlet, and a valve seal. A lever arm is connected to the valve seal and connected to a magnetic housing containing a valve magnet. A yoke pivots about the valve block where the yoke contains a yoke magnet aligned to interface with the valve magnet. A lever arm return spring is connected to the lever arm and the valve block to bias the lever arm return spring to a resting position. As the yoke pivots beyond a predetermined distance, the yoke magnet separates from the valve magnet allowing the lever arm to return to the resting position closing the valve.
1. A fluid dispensing apparatus comprising:
a base member defining a passageway for the passage of fluid;
a valve member mounted to the base member, the valve member normally closing the passageway;
a handle member pivotally connected to the base member; the handle member and the valve member being operatively connected over a predetermined distance to allow opening of the passageway;
the handle member and the valve member releasing from each other at an end of the predetermined distance allowing the valve member to close the passageway; and
wherein the handle member and the valve member are operatively connected by a pair of magnets.
2. The fluid dispensing apparatus of claim 1 wherein said valve member further comprises a lever arm connected at a first end to magnet holder holding one of said pair of magnets and at a second end to at least one valve seal.
3. The fluid dispensing apparatus of claim 2 further comprising a single or pair of valve seals.
4. The fluid dispensing apparatus of claim 2 wherein a second of said magnets is contained in said handle member.
5. A method for dispensing a portion amount of liquid beverage comprising:
coupling a lever arm to a yoke and adapting said lever arm so that an operator can depress said lever arm to dispense liquid beverage;
allowing the lever arm and yoke to rotate about a pivot point as said lever arm is depressed;
magnetically coupling a lever arm to said yoke so that said lever arm follows said yoke as said yoke rotates, said lever arm opening a valve seal at a certain point in said rotation allowing said liquid beverage to be dispensed; and
biasing said lever arm with a lever arm return spring so that force increases on said lever arm as said lever arm rotates, wherein after a predetermined amount of rotation, said lever arm separates from said yoke returning to a position wherein said valve seal closes and said dispensing stops.
6. The method of claim 5 further comprising an adjustment screw allowing adjustment of said predetermined amount of rotation.
7. The method of claim 6 wherein said adjustment screw is attached to a base member and encounters said lever arm during rotation to prevent further rotation of said lever arm.
8. The method of claim 5 further comprising a yoke return spring that causes said lever arm and yoke to return to a rest position when said handle is released by said operator.
9. The method of claim 5 wherein said magnetic coupling comprises a yoke magnet attached to said yoke and a lever arm magnet attached to said lever arm.