Dual syringe

Claim 2

A syringe for injecting a plurality of liquids into a patient in predetermined sequence, said syringe comprising: a main body portion having a plurality of barrels therein, each of said barrels being adapted to contain an injectable liquid; a plunger in each barrel for injection of said liquid; a valve body portion below said main body portion, said valve body portion having a manually operable valve therein and a free space on the outlet side of said valve for receiving said injectable liquids, said valve being movable successively to a plurality of positions so as to place each of said barrels in communication with said free space in a predetermined sequence; means for preventing movement of said valve in a sequence other than the predetermined sequence, whereby dispensing of liquids in an incorrect order is prevented; and a needle in communication with said free space for injecting said liquids into a patient.

Claim 3

A syringe according to claim 1 having at least two barrels filled with different liquids.

Claim 4

A syringe according to claim 1 in which there are two barrels.

Claim 5

A syringe according to claim 3 in which said valve is a slide valve, slidable between two positions, the first position permitting dispensing of medication from the first barrel and the second position permitting dispensing of medication from the second barrel.

Claim 6

A syringe according to claim 4 including a locking pin, said locking pin being positioned initially so as to prevent movement of said valve and being moved at the completion of dispensing liquid from the first barrel to a position which permits movement of said valve.

Claim 7

A syringe according to claim 1 in which each of said plungers has a thumb pad at the top thereof and at least one of said thumb pads has raised markings which are distinguishable by touch from the other thumb pad including any markings thereon.

Claim 8

A syringe for injecting a pair of liquids into a patient in predetermined sequence, said syringe comprising: a body; two barrels in said body, each of said barrels being adapted to contain an injectable liquid; a plunger in each barrel for injection of said liquid; a manually operable slide valve in said body for controlling the dispensing of the respective liquids from said barrels, said valve being slidable between two positions, the first position permitting dispensing of medication from the first barrel and the second position permitting dispensing of medication from the second barrel; a locking pin, said locking pin being positioned initially so as to prevent movement of said valve and being moved at the completion of dispensing liquid from the first barrel to a position which permits movement of said valve; a cavity in said body on the outlet side of said valve for receiving said liquids; and a needle in communication with said cavity for injecting said liquids into a patient.

Claim 9

A syringe for injecting a pair of liquids into a patient in predetermined sequence, said syringe comprising: a body; two barrels in said body, each of said barrels being adapted to contain an injectable liquid; a plunger in each barrel for injection of said liquid; a manually operable slide valve in said body for controlling the dispensing of the respective liquids from said barrels, said valve being slidable between two positions, the first position permitting dispensing of medication from the first barrel and the second position permitting dispensing of medication from the second barrel; a locking pin, said locking pin being positioned initially so as to prevent movement of said valve and being moved at the completion of dispensing liquid from the first barrel to a position which permits movement of said valve; a cavity in said body on the outlet side of said valve for receiving said liquids; and a needle in communication with said cavity for injecting said liquids into a patient.

Claim 10

A syringe according to claim 1 in which only one barrel at a time is in communication with said free space.

Claim 11

A syringe according to claim 1 in which said means for preventing movement of said valve in a sequence other than the predetermined sequence are locking means.

Claim 12

A syringe according to claim 9 in which said locking means include a locking pin.

Claim 13

A syringe according to claim 1 in which said barrels are filled with different liquids.

Claim 14

A syringe according to claim 1 in which said valve is a slide valve.

Claim 15

A syringe according to claim 12 in which said slide valve has a plurality of openings extending therethrough.

Claim 16

A syringe according to claim 1 in which each of said barrels has a restricted outlet opening.

Claim 17

A syringe according to claim 1 in which said main body portion, said valve body portion and said needle are in fixed relationship with respect to each other.

Claim 18

A syringe for injecting a plurality of liquids into a patient in predetermined sequence, said syringe comprising: a body having a plurality of barrels, each of which is adapted to contain an injectable liquid. a plunger in each barrel for the injection of liquid; a manually operated valve for controlling the dispensing of the respective liquids from said barrels, and a free space on the outlet side of said valve for receiving said liquids; said valve being movable successively through a plurality of positions so as to place each of said barrels in communication with said free space in a predetermined sequence; and means for preventing movement of said valve in a sequence other than the predetermined sequence, whereby dispensing of liquids in an incorrect order is prevented.

Claim 19

A syringe for injecting a plurality of liquids into a patient in predetermined sequence, said syringe comprising: a body having a plurality of barrels, each of which is adapted to contain an injectable liquid. a plunger in each barrel for the injection of liquid; a manually operated valve for controlling the dispensing of the respective liquids from said barrels, and a free space on the outlet side of said valve for receiving said liquids; said valve being movable successively through a plurality of positions so as to place each of said barrels in communication with said free space in a predetermined sequence; and means for preventing movement of said valve in a sequence other than the predetermined sequence, whereby dispensing of liquids in an incorrect order is prevented.

Claim 20

A valve according claim 16, including a needle communicating with said free space.