Metered dispensing device

• US 4,269,331 A
• Filed: 02/15/1980
• Issued: 05/26/1981
• Est. Priority Date: 02/15/1980
• Status: Expired due to Term

• Current Assignee: John D. Watson
• Original Assignee: John D. Watson
• Inventors: Watson, John D.
• Primary Examiner(s): SKAGGS JR, H GRANT
• Application Number:
  US06/121,839
• Time in Patent Office: 466 Days
• Field of Search: 222/390, 222/391, 222/392, 74/424.8 R, 74/527, 401/172, 401/175, 85/33, 151/11
• US Class Current: 222/390
• CPC Class Codes: A47G 19/183 by applying external pressure, i.e. by pumping or squeezing
• CPC Class Codes: B65D 83/0011 moved by a screw-shaft
• CPC Class Codes: G01F 11/027 of the syringe type
• CPC Class Codes: Y10T 74/19735 Nut disengageable from screw
• CPC Class Codes: Y10T 74/20636 Detents

Abstract

A dispensing device to meter the discharge of a predetermined amount of a given material, particularly a food product having a thixotropic consistency, wherein a tubular chamber is defined by an elongated housing having a discharge nozzle and a floating piston head disposed in the chamber, the piston head being moved by a threaded shaft which is controlled by a spring-loaded tooth member that allows the shaft to be selectively rotated, causing the piston head to be moved to a predetermined distance, thereby discharging the required amount of material.

Claims

1. A metered dispensing device for thixotropic products, comprising:

a tubular housing defining a chamber having front and rear open ends;

a discharge nozzle removably secured to the rear open end;

a cap member removably secured to the front end;

a rotational release means mounted to said cap member;

said rotational release means comprising a guide member formed integrally with said cap member, and a control member slidably received in said guide member;

wherein said control member comprises a body member having a central opening therein and an inwardly projecting tooth member disposed in said opening;

said tooth also defining a latching pin;

a plurality of selectively spaced detents formed in said shaft to receive said latching pin, wherein the placement of said detents determines the amount of product to be discharged from said chamber; and

a biasing spring positioned between said guide member and said control member, to provide a controlled engagement between said control member and said shaft member;

a threaded shaft adapted to be removably mounted in said rotational release means for selective rotation thereof; and

a piston head disposed in said chamber for longitudinal movement therein, and positioned for engagement with said shaft.

2. A metered dispensing device as recited in claim 1, wherein said threaded shaft includes a knob at one end, and an extended neck member for engagement with said piston head.