Jason Farris

US Patent:

20210030968, Feb 4, 2021

Filed:

Mar 22, 2019

Appl. No.:

16/982202

Inventors:

- Ra'anana, IL
Samuel DAUPHINAIS - Scottsdale AZ, US
Jason W. FARRIS - Gilbert AZ, US

International Classification:

A61M 5/315
A61M 5/20

Abstract:

An assembly for advancing a piston through a rotationally fixed cartridge includes a rotatable, axially fixed first member and an axially movable, rotatable second member connected thereto via a threaded connection and connectable to the piston. A friction pad is rotationally fixedly connected with the second member and includes first and second sets of fingers extending radially outwardly from a central disk. Both the first and second sets of fingers are configured to contact an interior side wall of the cartridge. The first set of fingers are angled toward a first rotational direction and are configured to wedge the friction pad between the side wall and the second member upon rotation of the first member in the first direction, thereby substantially preventing rotation in the first direction. The second set of fingers are angled toward a second rotational direction and are configured to substantially prevent rotation in the second direction.