DOSING APPARATUS

• US 3,715,058 A
• Filed: 03/03/1971
• Issued: 02/06/1973
• Est. Priority Date: 04/04/1970
• Status: Expired due to Term

• Current Assignee: Augustien Maria Clymans
• Original Assignee: Augustien Maria Clymans
• Inventors: Clymans, Augustien Maria
• Primary Examiner(s): Reeves, Robert B.
• Assistant Examiner(s): Slattery, James M.
• Application Number:
  US05/120,664
• Time in Patent Office: 706 Days
• Field of Search: 222/349,350,62,225,216,378,223,351,366,361,420-422,444,449,148,149,224,342 73/422GC
• US Class Current: 222/148
• CPC Class Codes: G01F 11/16 for liquid or semiliquid

Abstract

A dosing device having a pin which is movable through a liquid chamber and comprises a recess which passes into the liquid and is filled after the forward stroke of the pin. The recess is emptied outside the chamber after a return stroke. Capable of cooperating with this pin is a spring-loaded member which is in the form of the recess and is capable of displacing a quantity of gas which may be in said recess after which the recess is filled with liquid.

Claims

1. A liquid dosing apparatus comprising a container for storing the liquid to be dosed, a liquid-tight seal on at least one side of said container, a cylindrical pin arranged for axial movement within said cylinder and through said liquid-tight seal, means connected to said pin at an end of the container remote from said liquid-tight seal for causing said axial movement of said pin, means connected to said container for supplying the liquid to be dosed thereto, a recess situated on a side of said cylindrical pin for accommodating therein a predetermined quantity of liquid when said pin has been moved to its fully lifted position so that said recess will be located within the storage container and for delivering said predetermined quantity of liquid to an outlet pipe connected to said container when said cylindrical pin is in a fully depressed position so that said recess will have been moved outside said container and into said outlet pipe through said liquid-tight seal, a member having approximately the same shape as said recess carried within said storage container and resiliently secured to said container so that when said cylindrical pin is in its fully lifted position and located within said container said member will be engaged within said recess so as to displace any matter therefrom.

2. The liquid dosing apparatus according to claim 1 wherein said recess is formed as a part of a cylinder envelope.

3. The liquid dosing apparatus according to claim 1 wherein said recess is formed as a drop.

4. The liquid dosing apparatus according to claim 1 wherein said liquid to be dosed is amalgam and further comprising a first communication means connected to said storage container for supplying and removing a protective inert gas thereto and therefrom, and second communication means connected to said outlet pipe connected to said container for supplying and removing therefrom said protective inert gas.

5. The liquid dosing apparatus according to claim 4 wherein said protective inert gas is argon.

6. The liquid dosing apparatus according to claim 1 further comprising means connected to said storage container for causing an impact on said cylindrical pin during axial movement of said pin from said container into said outlet pipe and at a point after the recess has exited said container.

7. The liquid dosing apparatus according to claim 6 wherein said means for causing said impact comprises a spring tensioned by the downward movement of said cylindrical pin and sudden relaxation thereof upon further movement the pin.

8. The liquid dosing apparatus according to claim 1 further comprising an electric heating coil wound about said container for heating said container and electrical connection means connected to said heating coil for causing energization thereof.