Metered dose dispenser

• US 3,878,973 A
• Filed: 10/31/1973
• Issued: 04/22/1975
• Est. Priority Date: 10/31/1973
• Status: Expired due to Term

• Current Assignee: Pasquale R. Riccio
• Original Assignee: Pasquale R. Riccio
• Inventors: Riccio, Pasquale R.
• Primary Examiner(s): Tollberg, Stanley H.
• Application Number:
  US05/411,265
• Time in Patent Office: 538 Days
• Field of Search: 222/135,137,145,319,162,387,402.24,402.2,257,260 141/352,353,354 239/350
• US Class Current: 222/319
• CPC Class Codes: B05B 11/06 Gas or vapour producing the flow, e.g. from a compressible bulb or air pump
• CPC Class Codes: B65D 83/60 Contents and propellant separated
• CPC Class Codes: G01F 11/32 for liquid or semiliquid

Abstract

A metered dose dispenser has a piston-cylinder means for containing a body of liquid to be dispensed and having one member engageable by the finger of a user to exert pressure on the liquid. A metering valve means is mounted on the other member of the piston-cylinder means and has one portion which projects out of the said other member of the piston-cylinder means. The metering valve means is movable into and out of the other member of the piston-cylinder means for valving a metered amount of liquid from the piston-cylinder means when it is moved into the other member of the piston-cylinder means. The pressure on the liquid within the piston-cylinder means exerted by the finger pressure on the one member thereof is transmitted through the liquid being passed by the metering valve means and causes the metering valve means to emit the metered amount of liquid in a squirt. The device can be combined with a device for compressing air and, after the completion of the compression, suddenly releasing the compressed air and delivering it to a nozzle. In the combined structure there is provided a passage for conducting the liquid which is passed by the metering valve means to the nozzle where it is combined with the compressed air and emitted from the nozzle as a spray of find droplets of the liquid in compressed air.

Claims

1. A measured dose dispensing device comprising a pistoncylinder means for containing a body of liquid to be dispensed and having a piston member and a cylinder member, one member being engageable by the finger of a user to move it toward the other member for placing the liquid therein under pressure, said other member of said piston-cylinder means having a larger diameter recess therein at the end remote from said one member and a smaller diameter bore extending between said larger diameter recess and the space within said piston-cylinder means which contains said body of liquid, and a spring loaded stem extending through and movable through said recess and having a hollow stem portion on the end away from said one member of said piston-cylinder means and projecting out of said other member for engagement by another finger of the user to exert pressure thereon in the opposite direction from the pressure on the one member, said hollow stem portion being movable into and out of said other member of said piston cylinder means and having a solid stem portion with the same cross-sectional shape as said smaller diameter bore and movable into said bore when said stem is moved toward said one meMber for closing off the communication of said recess with said body of liquid during the initial movement of said stem into said one member, said hollow stem portion having an aperture therein which when the stem portion is out of the recess is out of communication with said recess and near the end of the movement of said hollow stem portion into said recess is placed in communication with said recess, whereby an amount of liquid corresponding to the volume of said recess is dispensed through said hollow stem portion.

2. A measured dose dispensing device as claimed in claim 1 further comprising a finger grip means on said hollow stem.

3. A measured dose dispensing device as claimed in claim 1 further comprising a spray head on said hollow stem.

4. A measured dose dispensing device as claimed in claim 1 in which said one member of said piston-cylinder means is a cylinder and the other member is a piston, said cylinder being movable over said piston.

5. A dispenser for dispensing liquid product in fine droplet form in compressed air, comprising a dispenser body, nozzle means opening out of said dispenser body, an air compressing piston-cylinder means mounted on said body and having a fixed member and a movable member movable relative to the fixed member through a compression stroke to compress the air, said body having a compressed air flow path therethrough from said air compressing piston-cylinder means to said nozzle means for conducting compressed air from said air compressing piston-cylinder means to said nozzle means, a valve member in said body and normally obturating said compressed air flow path, actuating pin means operatively associated with the movable member of said air compressing piston-cylinder means and said valve member for positively actuating said valve member to open said compressed air flow path near the end of said compression stroke only when said air compressing piston-cylinder means has compressed air to a predetermined pressure, a recess in said dispenser body, said body having a product flow path from said recess to said nozzle means, a measured dose dispensing device movably positioned in said recess and comprising a piston-cylinder means for containing a body of liquid to be dispensed and having two members, one member extending out of the recess and being movable toward the other for placing the liquid therein under pressure, and a metering valve means mounted on said other member of said piston-cylinder means and having a hollow stem portion projecting out of said other member into said recess and in communication with said product flow path, said hollow stem portion being movable into and out of said other member of the piston-cylinder means for valving a measured amount of liquid from the piston-cylinder means when said other member is moved into said recess while said hollow stem portion is abutted against the inner end of said recess.

6. A dispenser as claimed in claim 5 in which said one member of said piston-cylinder means is a cylinder and the other member is a piston, said cylinder movable over said piston, said piston, being movably positioned in said recess.

7. A dispenser as claimed in claim 5 in which said air compressing pistons cylinder means and the measured dose dispensing device are on opposite ends of said dispenser body.