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. 18, 2025
Filed:
May. 06, 2022
Caterpillar Inc., Peoria, IL (US);
Jon Tyler Immel, Chillicothe, IL (US);
CATERPILLAR INC., Peoria, IL (US);
Abstract
An anti-prefill device may be disposed at a radially central portion of an endcap mounted on one axial end of an annular filter medium in a filter system. The anti-prefill device includes a first, annular, fluid receiving portion including an externally threaded engagement surface configured to be threadingly engaged with a central, internally threaded boss of a filter base of the filter system at the axial end of the annular filter medium, the first, annular, fluid receiving portion defining an annular concave recess open upwards toward the filter base of the filter system, and a second, annular, fluid blocking portion configured as a cylindrical cap overlapping a radially central tubular portion of the first, annular, fluid receiving portion that projects upwards toward the filter base from a radially inner extent of the radially central portion of the endcap, the second, annular fluid blocking portion being oriented with a concave recess of the cylindrical cap open downwards toward the first, annular, fluid receiving portion.