Liquid dispenser

Claim 2

A liquid dispenser comprising: a housing having a primary chamber therein and inlet and outlet ports communicating with said primary chamber, said inlet port opening into the upper end of said primary chamber and being adapted to be connected to a source of primary liquid above said chamber, said outlet port opening into the lower end of said primary chamber; means on said housing defining a secondary liquid chamber opening into said primary chamber, and means including an inlet passage adapted to be connected to a source of secondary liquid; plunger means slidable vertically in said primary chamber between upper and lower positions, said plunger means having passage means therethrough extending between said inlet and outlet ports, in said upper position said plunger means closing said inlet port and said secondary liquid chamber and in said lower position said passage means being in direct flow communication with said inlet port and said secondary liquid chamber so that liquids entering said primary chamber from said inlet port and said secondary liquid chamber will mix within said passage means and thereafter discharge from said primary chamber through said outlet port, said plunger means being movable downwardly from said upper position to said lower position soley by the introduction of fluid pressure through said inlet port into said primary chamber; and means biasing said plunger means toward said upper position.

Claim 3

A liquid dispenser as set forth in claim 1 including: a one-way valve in said inlet passage allowing flow of secondary liquid into said secondary liquid chamber.

Claim 4

A liquid dispenser as set forth in claim 2 including: a flow restriction in said secondary liquid chamber between said valve and said primary chamber.

Claim 5

A liquid dispenser as set forth in claim 1 wherein: said primary chamber and said plunger means are cylindrical, the outer surface of sAid plunger means being in sliding engagement with the wall of said primary chamber; an end wall is provided at one end of said primary chamber; said inlet port is in said end wall coaxial with the axis of said cylindrical primary chamber; said secondary liquid chamber opens at the cylindrical wall of said primary chamber; said passage means comprises at least one longitudinally extending bore in said plunger means offset from said axis and an annular groove in the outer surface of said plunger means communicating with said bore; when said plunger means is in said upper position said groove is between said secondary liquid chamber and said end wall, and one end of said plunger means closes said inlet port; and when said plunger means is in said lower position said one end of said plunger is displaced from said inlet port to open the same and said groove registers with said secondary liquid chamber.

Claim 6

A liquid dispenser comprising: a housing having a cylindrical primary chamber therein and inlet and outlet ports communicating with said primary chamber, said inlet port being adapted to be connected to a source of primary liquid; means on said housing defining a secondary liquid chamber opening into said primary chamber, and means including an inlet passage adapted to be connected to a source of secondary liquid; an end wall at one end of said primary chamber; said inlet port and said secondary liquid chamber being located at said end wall and communicating with said primary chamber at positions offset from the longitudinal axis of said primary chamber; cylindrical plunger means slidable in said primary chamber between first and second positions, the outer surface of said plunger means being in sliding engagement with the wall of said primary chamber, said plunger means having passage means therethrough extending between said inlet and outlet ports coaxial with said axis, in said first position said plunger means closing said inlet port and said secondary liquid chamber and said passage means being closed by said end wall, and in said second position said passage means being in direct flow communication with said inlet port and said secondary liquid chamber so that liquids entering said primary chamber from said inlet port and said secondary liquid chamber will mix within said passage means and thereafter discharge from said primary chamber through said outlet port; and means biasing said plunger means toward said first position.

Claim 7

A liquid dispenser comprising: a housing having a cylindrical primary chamber therein and inlet and outlet ports communicating with said primary chamber, said inlet port being adapted to be connected to a source of primary liquid; means on said housing defining a secondary liquid chamber opening into said primary chamber, and means including an inlet passage adapted to be connected to a source of secondary liquid; an end wall at one end of said primary chamber; said inlet port and said secondary liquid chamber being located at said end wall and communicating with said primary chamber at positions offset from the longitudinal axis of said primary chamber; cylindrical plunger means slidable in said primary chamber between first and second positions, the outer surface of said plunger means being in sliding engagement with the wall of said primary chamber, said plunger means having passage means therethrough extending between said inlet and outlet ports coaxial with said axis, in said first position said plunger means closing said inlet port and said secondary liquid chamber and said passage means being closed by said end wall, and in said second position said passage means being in direct flow communication with said inlet port and said secondary liquid chamber so that liquids entering said primary chamber from said inlet port and said secondary liquid chamber will mix within said passage means and thereafter discharge from said primary chamber through said outlet port; and means biasing said plunger means toward said first position.

Claim 8

A liquid dispenser as set forth in claim 5 wherein: said housing includes a body and a cap secured to said body at said one end of said primary chamber; and said end wall forms a part of said cap.

Claim 9

A liquid dispenser as set for in claim 5 including: a one-way valve in said inlet passage allowing flow of secondary liquid into said secondary liquid chamber.

Claim 10

A liquid dispenser as set forth in claim 7 including: a flow restriction in said secondary liquid chamber between said valve and said primary chamber.

Claim 11

A liquid dispenser comprising: a housing having a cylindrical upright chamber therein and an upper end wall; an outlet port at the lower end of said housing communicating with said chamber; a cylindrical plunger slidable vertically within said chamber; a passage extending longitudinally through said plunger; an inlet port and secondary liquid chamber at said upper end wall each opening into said upright chamber and out of alignment with said passage; and means biasing said plunger upwardly into engagement with said end wall to close said inlet port and said secondary liquid chamber, said plunger being movably downwardly in said upright chamber solely by the introduction of fluid pressure through said inlet port into said upright chamber.

Claim 12

A liquid dispenser comprising: a housing having a cylindrical upright chamber therein and an upper end wall; an outlet port at the lower end of said housing communicating with said chamber; a cylindrical plunger slidable vertically within said chamber; a passage extending longitudinally through said plunger; an inlet port and secondary liquid chamber at said upper end wall each opening into said upright chamber and out of alignment with said passage; and means biasing said plunger upwardly into engagement with said end wall to close said inlet port and said secondary liquid chamber, said plunger being movably downwardly in said upright chamber solely by the introduction of fluid pressure through said inlet port into said upright chamber.

Claim 13

A liquid dispenser as set forth in claim 9 including: an inlet passage for said secondary liquid chamber; and a one-way valve in said inlet passage permitting lIquid to flow downwardly into said secondary liquid chamber.

Claim 14

A liquid dispenser as set forth in claim 10 including: a flow restriction in said secondary liquid chamber between said valve and said upright chamber.

Claim 15

A liquid dispenser as set forth in claim 9 wherein: said housing comprises a cylindrical body and a cap secured to the upper end thereof, said cap providing said end wall.

Claim 16

A liquid dispenser comprising: a housing having a cylindrical upright chamber therein and an upper end wall; an outlet port at the lower end of said housing communicating with said chamber; a cylindrical plunger slidable vertically within said chamber, said plunger being a hollow cup-shaped member facing downwardly and providing an upper base portion; a passage extending longitudinally through said base portion; an inlet port and secondary liquid chamber at said upper end wall each opening into said upright chamber and out of alignment with said passage; and means biasing said plunger upwardly into engagement with said end wall to close said inlet port and said secondary liquid chamber, said biasing means comprising a coil spring in said cup-shaped member engaging said base portion.

Claim 17

A liquid dispenser comprising: a housing having a cylindrical upright chamber therein and an upper end wall; an outlet port at the lower end of said housing communicating with said chamber; a cylindrical plunger slidable vertically within said chamber, said plunger being a hollow cup-shaped member facing downwardly and providing an upper base portion; a passage extending longitudinally through said base portion; an inlet port and secondary liquid chamber at said upper end wall each opening into said upright chamber and out of alignment with said passage; and means biasing said plunger upwardly into engagement with said end wall to close said inlet port and said secondary liquid chamber, said biasing means comprising a coil spring in said cup-shaped member engaging said base portion.

Claim 18

A liquid dispenser as set forth in claim 1 including: a source of primary liquid above said primary chamber connected to said inlet port.