Self-proportioning fluid dispensing apparatus

Claim 2

In a gasoline dispensing system having three dispensers for dispensing three grades of gasoline from a first storage tank connected to one dispenser and a second tank connected to a second dispenser, the third dispenser being connected to both tanks, a fluid mixer comprising: a mixer body having a pair of inlets; a common outlet connecting to the third dispenser and defining a passageway from each said inlet to the common outlet; a throttling valve means including a valve body slidably disposed laterally in said mixer body and including a valve seat in each said passageway in axial alignment with said valve body, for inversely varying the opening through said passageways; a control valve assembly having a control valve body slidably disposed laterally in said mixer body intermediate said throttling valve means and said outlet, and a control valve orifice disposed in each said passageway with the ends of said control valve body terminating at said control orifices; selector means for sliding said control valve body across said control valve orifices; and actuator means being responsive to flow through said control valve orifices for operating said throttle valve means to equalize pressure in said passageways.

Claim 3

The gasoline dispensing system of claim 1 wherein said selector means has a manually adjustable means connected to said control valve body for determining the mixture of said third grade, and said actuator means is a pressure actuator having a movable member and a pair of pressure input chambers to the opposite sides of said movable member, each chamber communicating with one said passageway, said actuator means having a connector from said movable member to said throttle means to position said valve member in accordance with the relative pressure levels in said passageways.

Claim 4

The fluid mixer of claim 1 and including check valve means for opening and closing said passageways in response to pressure in said passageways.

Claim 5

A fluid dispensing apparatus for mixing a first and second liquid in varied proportions, comprising; a body having a central portion and defining a pair of flow passageways to either side of said central portion, said passageways having orifices at said central portion, the orifices being aligned on a first lateral axis of said body; a throttle valve having a valve body slidably disposed in said central portion along said lateral axis, the valve body extending outward into said passageways to said orifices; a control means for inversely varying the flow through said passageways, said control means having a control member body slidably disposed through said central portion on a second lateral axis upstream of said throttle valve, said control member being slidable into said passageways to inversely restrict the flow area of said passageways; and pressure actuator means connected to said throttle valve and communicating with the passageways interMediate said first and second axes, for operating said throttle valve to equalize pressures in said passageways.

Claim 6

A fluid dispensing apparatus for mixing a first and second liquid in varied proportions, comprising; a body having a central portion and defining a pair of flow passageways to either side of said central portion, said passageways having orifices at said central portion, the orifices being aligned on a first lateral axis of said body; a throttle valve having a valve body slidably disposed in said central portion along said lateral axis, the valve body extending outward into said passageways to said orifices; a control means for inversely varying the flow through said passageways, said control means having a control member body slidably disposed through said central portion on a second lateral axis upstream of said throttle valve, said control member being slidable into said passageways to inversely restrict the flow area of said passageways; and pressure actuator means connected to said throttle valve and communicating with the passageways interMediate said first and second axes, for operating said throttle valve to equalize pressures in said passageways.

Claim 7

The fluid dispensing apparatus of claim 4 wherein said throttle valve includes a positioning shaft extending outwardly from one end through one of said orifices and a balancing shaft stub extending from the opposite end through the second of said orifices.

Claim 8

The fluid dispensing apparatus of claim 4 wherein the ends of said throttle valve are frustoconically shaped to produce a smooth proportional change in the orifice opening with movement of the valve member.

Claim 9

A fluid dispensing apparatus for delivery of different ratios of a first and second liquid through a pair of flow passageways, comprising: a body portion defining said passageways; valve means in said flow passageways for inversely opening and closing said passageways; control means disposed in spaced relation from said valve means for varying the flow resistance of said passageways, said control means including a control shaft disposed for movement laterally of said passageways with the ends of said control shaft terminating in said passageways and inversely varying the cross-sectional flow areas thereof; an actuator having a diaphragm and a pair of opposed pressure input means disposed to the opposite sides of said diaphragm, said input means connecting respectively to the passageways between said control shaft and said valve means; means connecting said diaphragm to said valve means; said control shaft having an axial end opening; and adjusting means including a positioning rod threaded into said axial opening and rotatably mounted in said body portion for axially moving said control shaft relative to said passageways; the inner end of said axial opening having a vent to prevent trapping of fluid within said opening.

Claim 10

A fluid dispensing apparatus for delivery of different ratios of a first and second liquid through a pair of flow passageways, comprising: a body portion defining said passageways; valve means in said flow passageways for inversely opening and closing said passageways; control means disposed in spaced relation from said valve means for varying the flow resistance of said passageways, said control means including a control shaft disposed for movement laterally of said passageways with the ends of said control shaft terminating in said passageways and inversely varying the cross-sectional flow areas thereof; an actuator having a diaphragm and a pair of opposed pressure input means disposed to the opposite sides of said diaphragm, said input means connecting respectively to the passageways between said control shaft and said valve means; means connecting said diaphragm to said valve means; said control shaft having an axial end opening; and adjusting means including a positioning rod threaded into said axial opening and rotatably mounted in said body portion for axially moving said control shaft relative to said passageways; the inner end of said axial opening having a vent to prevent trapping of fluid within said opening.