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:
Mar. 02, 2021
Filed:
Nov. 06, 2019
Applicant:
Caterpillar Inc., Peoria, IL (US);
Inventors:
Ashwin A. Hattiangadi, Edwards, IL (US);
Abram M. Ingold, Metamora, IL (US);
Rong Qu, Dunlap, IL (US);
Assignee:
Caterpillar Inc., Peoria, IL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F01L 3/22 (2006.01); F01P 3/14 (2006.01); F01L 3/06 (2006.01); F02F 1/24 (2006.01); F02F 7/00 (2006.01); F16K 11/044 (2006.01);
U.S. Cl.
CPC ...
F01L 3/22 (2013.01); F01P 3/14 (2013.01); F01L 3/06 (2013.01); F01L 2303/00 (2020.05); F02F 2001/245 (2013.01); F02F 2007/0097 (2013.01); F16K 11/044 (2013.01);
Abstract
A valve seat insert of an engine has a valve seating surface including an outer curved segment forming a first wear crown for contacting the valve at an early wear state, an inner curved segment forming a second wear crown for contacting the valve at a later wear state, and a linear segment extending between the outer and the inner curved segments. A sloping segment is oriented at an acute angle relative to the valve seat center axis, forming a venturi or a diffuser for gases entering or exiting the cylinder.