The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 11, 2020
Filed:
Jan. 30, 2017
Northrop Grumman Systems Corporation, Falls Church, VA (US);
Kenneth F. McKinney, San Diego, CA (US);
Andrew Simmons, San Diego, CA (US);
Kenneth Weidele, San Diego, CA (US);
Tim Manestitaya, San Diego, CA (US);
Alex Grammar, San Diego, CA (US);
Northrop Grumman Systems Corporation, Falls Church, VA (US);
Abstract
A feed mechanism for feeding a filament through a print head assembly in an FDM printer. The feed mechanism includes a first oval-shaped track having a plurality track elements extending around the first track and a second oval-shaped track having a plurality of track elements extending around the second track, where the first and second tracks counter-rotate. A space is defined between the first and second tracks that receives the filament in a manner so that the track elements that are in the space contact the filament, where rotation of the first and second tracks in opposite directions causes the filament to be driven through the space and onto the print head.