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:
Jan. 02, 2018
Filed:
May. 22, 2015
Applicant:
Caterpillar Inc., Peoria, IL (US);
Inventor:
Mark Rosenfeld, Peoria, IL (US);
Assignee:
Caterpillar Inc., Peoria, IL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F02M 35/08 (2006.01); B01D 50/00 (2006.01); B01D 45/12 (2006.01); B01D 46/00 (2006.01); F02M 35/16 (2006.01); F02M 35/04 (2006.01); F02M 35/10 (2006.01);
U.S. Cl.
CPC ...
F02M 35/086 (2013.01); B01D 45/12 (2013.01); B01D 46/0065 (2013.01); B01D 50/002 (2013.01); F02M 35/04 (2013.01); F02M 35/048 (2013.01); F02M 35/10013 (2013.01); F02M 35/164 (2013.01); Y02T 10/146 (2013.01);
Abstract
A pre-filter includes a first stage, a second stage, and a third stage. The first stage includes a first stage screen, a brush disposed against the first stage screen, and an actuator to move the brush and the first stage screen relative to one another. The second stage includes a centrifugal separator. The third stage includes a filter media having pores of a predetermined size.