Easy loading manual extruder for viscous material

Details Easy loading manual extruder for viscous material Easy loading manual extruder for viscous material

1991-02-04

1992-06-30

Wilson, John J.

Dentistry

Apparatus

Having intra-oral dispensing means

A61C 504

Patent

active

051258366

ABSTRACT:
A manual extruder or syringe having a longitudinal slot therein adjacent the full circumference front end for receiving the nozzle of a cartridge. A barrel of a syringe having a front end and a breach opening adjacent thereto for receiving a cartridge of the type having an angularly disposed nozzle and rear flange. The slot in the front end is only wide enough to receive the width of the nozzle and prevents the body portion of the cartridge from passing therethrough. The body portion can then easily be slid along the barrel into the front end to be held by the flange against a substantially full circumference shoulder. The front end can be made very rigid, and the shoulder extending substantially the full circumference of the front end securely holds the cartridge preventing any possibility of unintentional separation from the syringe. In one embodiment, a notch is also provided to permit the cartridge to be inserted with the nozzle pointing upward. In another embodiment, a track or guide is provided along the slot to help guide the body portion of the cartridge past the shoulder.

REFERENCES:
patent: 2505028 (1950-04-01), Boeger
patent: 4384853 (1983-05-01), Welsh

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